colorado college barnes science center retro-commissioning ...€¦ · assessment report for this...

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Colorado College Barnes Science Center Retro-Commissioning

Preliminary Site Assessment

Submitted to: Colorado College Facilities Services

1125 Glen Avenue

Colorado Springs, CO 80905

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Barnes Science Center Preliminary Site Assessment RCx Report

Page i

This page left purposely blank for double-sided printing

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Executive Summary

This Preliminary Site Assessment includes an ASHRAE Level I report, and has identified energy cost

reduction opportunities, repair and maintenance items, and capital improvement projects to be considered for

further evaluation and development with estimation. The BESECx team performed an on-site preliminary

walk-through assessment of this facility noting present operating and maintenance practices, all possible

deficiencies and opportunities for improvements, and then developed a master list of findings compiled in

Appendix C. These deficiencies and opportunities for improvements have been sorted in one of three

categories, ECM’s (Energy Cost Reduction Opportunities), CIP (Capital Improvement Projects), or R&M

(Repair and Maintenance) items.

Even though this building is now 23 years old, with most of the HVAC systems exceeding their median

service life, Barnes Science Center is still a well performing classroom-laboratory building. This is result of

good energy efficiency decisions made during the mid-to-late 80s to incorporate heat recovery systems and

photo-operated lighting controls for lobby and stair towers.

The Energy Use Index (EUI) is an industry standard metric to evaluate the performance of a building,

expressed in the units of kBtu/sf/yr. Thermal data has been harvested from BTU meters installed and

operational during the spring of 2011, and electrical usage and demand data is available from the utility meter

installed in September 2008. Estimating based on normalized weather data for the high-temperature hot and

chilled water usage for the first three months of last year (before thermal meters were installed), the measured

energy consumption was approximately 10.0 MMBtu (10,000,000± kBtu) with an extrapolated EUI of 140

kBtu per square foot per year.

Published data for academic-research laboratory classroom building is sparse, but table below represents a

comparison with data from peer facilities with similar occupancy and operating characteristics.

Energy Performance Rating Comparisons

(EUI in kBtu/sf/yr)

Nat'l or

other Avg Barnes % Diff

CBECS 2003 climate specific average laboratory 255 140 -45%

Research Laboratory (non-higher education, from CBECS) 610 140 -77%

College/University (Campus-level) 283 140 -51%

CC Facilities Management is the on right track with this facility. The original MEP design intent was high-

performing relative to other facilities built in the late 1980s. The two air to air heat recovery systems and the

stair tower – lobby daylighting control system stand out as significant contributors to this building’s energy

performance.

Lord Kelvin once stated "if you cannot measure it, you cannot improve it." CC Facilities Management in

conjunction with the campus Sustainability group has recently begun to incorporate a measurement and

verification program to monitor the energy usage of key campus buildings and the central plant.

The retro-commissioning process includes an ongoing consultation with operational and maintenance

personnel, as well as building occupants. Concurrent with the preliminary site assessment, the Master List of

Deficiencies and Opportunities is developed; this list is one of the most significant deliverables from the

retro-commissioning process and ultimately becomes an important decision making tool. Every finding from

the investigation phase is summarized on the Master List, including those adjustments and repairs made

during the course of the investigation process. This PSA (Preliminary Site Assessment) documents over 25

ECM’s in Appendix C, along with a dozen suggested CIP's (capital improvement projects).

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TABLE OF CONTENTS

EXECUTIVE SUMMARY.....................................................................................................................................i

OWNER’S PROJECT REQUIREMENTS ...................................................................................................................... 1

RETRO-COMMISSIONING PROCESS OVERVIEW ................................................................................................. 1

OBJECTIVES OF THE RETROCOMMISSIONING PROCESS .......................................................................................................... 1

FACILITY DESCRIPTION .............................................................................................................................................. 4

GENERAL BUILDING ENERGY SYSTEMS DESCRIPTIONS ........................................................................................................ 4

ENERGY COST, USAGE, AND BASELINE METRICS .............................................................................................. 8

ENERGY AUDIT ..................................................................................................................................................................... 8

ELECTRICAL COSTS, USAGE, DEMAND, AND POWER FACTOR ............................................................................................... 8

NATURAL GAS COSTS AND USAGE ...................................................................................................................................... 11

ENERGY METERS ................................................................................................................................................................. 11

BASELINE ENERGY USAGE .................................................................................................................................................. 11

BENCHMARKING .......................................................................................................................................................... 12

EPA ENERGY STAR PORTFOLIO MANAGER ......................................................................................................................... 12

CBECS ............................................................................................................................................................................... 12

ENERGY COST REDUCTION MEASURES (ECM) .................................................................................................. 12

OBJECTIVES ......................................................................................................................................................................... 12

ECM MASTER FINDINGS LIST ............................................................................................................................................. 13

CAPITAL IMPROVEMENT PROJECTS (CIP) .......................................................................................................... 13

OPPORTUNITIES ................................................................................................................................................................... 13

CIP MASTER FINDINGS LIST ............................................................................................................................................... 13

FUME HOOD CONTROLS ...................................................................................................................................................... 13

REPAIR AND MAINTENANCE (R&M) ...................................................................................................................... 13

OBJECTIVES ......................................................................................................................................................................... 13

SYSTEMS AND EQUIPMENT CONDITION ANALYSIS AND ASSESSMENT ................................................................................. 14

HVAC SYSTEMS ................................................................................................................................................................. 14

LIGHTING SYSTEMS ............................................................................................................................................................. 14

BUILDING ENVELOPE .......................................................................................................................................................... 14

NEXT STEPS .................................................................................................................................................................... 15

ASHRAE LEVEL II ENERGY AUDIT .................................................................................................................................... 15

INVESTIGATIVE RETRO-COMMISSIONING PHASE ................................................................................................................. 15

REPORT INTELLIGENCE ............................................................................................................................................ 16

ABBREVIATIONS, ACRONYMS AND UNITS ........................................................................................................................... 16

DISCLAIMER ........................................................................................................................................................................ 16

REVISION HISTORY ............................................................................................................................................................. 16

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CHARTS

Chart 1: Comparison of Oct 2009 - 2011 Electric Unit Cost per Month ($/kWh) ...............................................9 Chart 2: Electric Usage Profile October 2009 - 2011 ..........................................................................................9 Chart 3: Electrical Demand Profile for October 2009 - 2011 ............................................................................10 Chart 5: Energy Usage Profile Oct 2010 through Sept 2011 .............................................................................11 Chart 6: Energy Usage Comparative to Weather Conditions Oct 2010 through Sept 2011 ..............................12

TABLES

Table 1: Past Year Electrical Costs ....................................................................................................................10

FIGURES

Figure 1: Lab AHU with Heat Wheel Control Diagram ......................................................................................5 Figure 2: Snapshot from BAS Submeter ............................................................................................................11

PHOTOS

Photo 1: Heat Wheel Serving Anatomy/Science Lab and Animal Suite .............................................................5 Photo 2: Anatomy/Science Lab and Animal Suite Pre & Final Filtration Bank ..................................................6 Photo 3: Building AHU Supply Fan ....................................................................................................................6 Photo 4: Atrium Lobby Lighting .........................................................................................................................7 Photo 5: Corridor Lighting ...................................................................................................................................7 Photo 6: Greenhouse Lighting .............................................................................................................................8 Photo 8: Door Leading to South Observatory Deck ..........................................................................................14 Photo 9: Observatory Dome ...............................................................................................................................15

APPENDICES

FACILITY ENERGY ACCOUNTING MATRIX........................................................................................... ................ APPENDIX A

ENERGY STAR STATEMENT OF ENERGY PERFORMANCE….................................................................. ................ APPENDIX B

MASTER FINDINGS LIST ................................................................. ......................................................................APPENDIX C

PHOTO LOG OF IDENTIFIED DEFICIENCIES AND OPPORTUNITIES ……………..................................... ................ APPENDIX D

BUILDING OPERATION SCHEDULE.................................................................................... .................................... APPENDIX E

UTILITY RATE SHEETS................................................................................................. ......................................... APPENDIX F

FACILITY DOCUMENTS CHECKLIST................................................................................................. ..................... APPENDIX G

EQUIPMENT SERVICE LIFE DATA …..……………….......................................................................................... APPENDIX H

INFRARED THERMOGRAPHY…..……………….......................................................................... ........................... APPENDIX I

ECM MANUFACTURER CATALOG DATA...................... .........................................................................................APPENDIX J

RCX TEAM CONTACT INFORMATION................................................................................................. .................. APPENDIX K

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Page 1

Owner’s Project Requirements

The Owner’s Project Requirements detail the functional requirements of a project and the expectations of the

Project Owner. These include project goals, measurable performance criteria, cost considerations,

benchmarks, success criteria, and supporting information. The source of some of these requirements is

Colorado College’s goal for achieving carbon neutrality by 2020 as documented in ―A Strategic Vision for

Energy Efficiency at Colorado College‖.

The following summarizes the key Owner’s Project Requirements identified for this retro-commissioning

project:

1) To achieve a 30% reduction in energy use through efficiency upgrades;

2) To identify no or low-cost ECM’s (Energy Cost Reduction Measures) to be possibly implemented

during investigation phase by either CC Facilities Maintenance staff or Long Building Technologies

with minimal capital investment;

3) To identify longer term Energy Cost Reduction Measures for planning purposes to further reduce

energy consumption through replacement or upgrade by attrition;

4) To identify Capital Improvement Projects (CIP), analyze the collected data, and document proposed

system solutions accordingly to justify resource needs to both stakeholders and decision makers;

5) To identify Repair and Maintenance (R&M) deficiencies that affect energy, IAQ, or occupant

comfort;

6) To perform condition assessments of systems and equipment during investigation phase and to

augment current equipment asset inventory of all building energy systems and equipment as required;

7) Summarize identified ECM, R&M, and CIP items for Colorado College Facility Management and

other stakeholders to select items for immediate implementation or to defer for future projects.

Retro-Commissioning Process Overview

Commissioning of existing buildings or ―retro-commissioning,‖ is an event in the life of a building applying a

systematic process for identifying and implementing operational and maintenance improvements and for

ensuring their continued performance over time. The retro-commissioning process most often focuses on

dynamic energy-using systems with the goal of reducing energy waste, obtaining energy cost savings, and

identifying and fixing existing problems. Retro-commissioning assures system functionality. It is an inclusive

and systematic process that intends not only to optimize how equipment and systems operate, but also to

optimize how the systems function together.

Objectives of the Retrocommissioning Process

Although Retrocommissioning may include recommendations for capital improvements, the primary focus is

on using O&M tune-up activities and diagnostic testing to optimize the building systems. Retro-

commissioning is not a substitute for major repair work. Repairing major problems should be performed

before retro-commissioning can be fully completed. The following have been identified by Portland Energy

Conservation, Inc. (PECI) as the typical primary objectives for retro-commissioning a project:

Benchmark current energy usage through energy audits

Improve facility operation and maintenance

Reduce energy and demand costs

Increase equipment life

Improve indoor air quality

Increase occupant satisfaction and reduce complaints

Reduce O&M staff time spent on emergency calls

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Facility Description

The following summarizes the general description of the building surveyed for the preliminary assessment:

a) Barnes Science Center, dedicated in 1988, and named Barnes Science Center April 23, 1990, in

recognition of the substantial trust fund established by Professor and Mrs. Barnes.

b) Description: 5-story 69,000 ft2 building houses academic and research laboratories, offices, and

classrooms for anthropology, chemistry and physics departments; unique academic features

include astronomical observatory, four greenhouses and a herbarium.

c) Exterior Doors: metal and aluminum storefront

d) Facility Documents available: see Appendix G

General Building Energy Systems Descriptions

BESECx performed a thermal infrared imaging survey during early November. A separate report was issued

to Colorado College Facilities Management which included other east campus buildings including Armstrong

Hall, Olin Hall, and Tutt Library. Preliminary assessment surveys of the facility were conducted during

November 2011 and with follow-ups in December and early January.

HVAC Systems: similar to the majority of buildings at CC campus, HTHW (High Temperature Heating

Water) is supplied from the central plant to a lower temperature secondary or tertiary building hydronic loop

through a heat exchanger located in the basement of Olin Hall (for more detail refer to the preliminary site

assessment report for this project).

Chilled water is provided for both Olin Hall and this facility from the central plant into the Barnes original

chiller room now used for storage as well as water service entrance and the motor control center.

The building chilled water services are separated by a plate and frame heat exchanger; due to the freeze

potential at Olin Hall, a propylene glycol solution is used.

The main building air handler is located in the basement room 113; the 50 hp supply fan is equipped with

adjustable inlet vanes. The DDC controls are programmed with a PID (Proportional + Integral + Derivative)

loop which adjust the speed of the 50 hp supply fan to ensure the farthest VAV terminal unit is supplied a

minimum of 1‖ w.g. static pressure. Correspondingly, to maintain a positive building pressure, the unit relief

fan operates to maintain a positive 0.05‖ w.g. relative to the outdoors. This unit is equipped with optimal start-

stop controls and air side economizer.

The Anatomy/Science Lab and Animal Suite is served by an air handler unit equipped with a 10 hp supply fan

motor is located in the basement. A heat wheel (see photo below) located between the exhaust system and

outside air intake is an effective air-to-air energy recovery technology. By rotating at the most optimum speed,

the wheel transfers heat energy during the winter from the exhausted air and pre-heat the incoming ventilation

makeup air. A desiccant type wheel transfers both sensible (heat) and latent (moisture) energy. At an outside

air temperature of 20°F, a downstream entering temperature of 58°F was observed; this calculates to a heat

transfer effectiveness rate of 78%. This unit is also equipped with an evaporative cooling coil downstream of

the chilled water coil.

The laboratory air handler unit is located in the fifth floor mechanical room, as equipped with a tilting heat

pipe coil located in both intake and exhaust streams. This unit is powered by two 60 hp fans with variable

speed drives optimizing the air flow rate based on lab space requirements. A BAS snapshot is depicted in the

figure below; the calculated temperature transfer efficiency of this heat recovery unit for the conditions of

28.7°F and discharge air temperature of 48.3° F is 46.5%.

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Figure 1: Lab AHU with Heat Wheel Control Diagram

The building computer center is served by two CRAC units rejecting heat to a recently upgraded dry cooler

located on the roof. This system is equipped with "free cooling" to reject data center heat outdoors through a

pumped glycol solution.

Photo 1: Heat Wheel Serving Anatomy/Science Lab and Animal Suite

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Photo 2: Anatomy/Science Lab and Animal Suite Pre & Final Filtration Bank

Photo 3: Building AHU Supply Fan

BAS / Temperature Controls: During 2010, upgrades were performed to the Siebe DMS-3500 DDC

building automation system including the new higher end AX interface.

Domestic Water Heating: Domestic hot water is generated by a steam heat exchanger located in the

basement of Olin Hall. The domestic hot water is supplied to fixtures at a setpoint of 125° F.

Interior Lighting: Classroom and office fixtures are primarily 32W T8 fluorescent recessed prismatic 2x4

lay-in troffers.

Formerly pneumatically controlled inlet vanes for 50 hp building AHU; new VFD currently provides variable air

flow volume

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Photo 4: Atrium Lobby Lighting

Photo 5: Corridor Lighting

Fluorescent Corridor lighting with PL13 lamps to be soon phased out of production

Original incandescent exit signage upgrade to

LED type

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Photo 6: Greenhouse Lighting

Lighting Controls: the majority of classroom and office spaces deploy dual-level split ballast switching.

Second faculty floor offices sampled during the site survey also had under cabinet lighting separately switched,

and faculty were observed performing computer work without the overhead lights on. Stairwells are equipped

with automatic low-voltage control with a photocell located in the fifth floor of the east stairwell to turn off

lights when the lighting level drop below 5 footcandles. The drawings indicate an astronomical timeclock

located in room 127; during the preliminary site visit, the accuracy of the timeclock was not verified. O

Plumbing Fixtures: fixtures observed appear to be the 1988 originals including water closets at 3.5 gallons

per flush. Facilities Management has confirmed the lavatory faucets were later modified with 1.5 gpm aerator

devices.

Energy Cost, Usage, and Baseline Metrics

Energy Audit

Prior to starting any energy analysis, a preliminary energy use analysis is performed to determine a building's

current energy and cost efficiency relative to other, similar buildings. This is normally done by calculating the

energy use and cost per sf per year, which can indicate the potential value of further levels of analysis.

Electrical Costs, Usage, Demand, and Power Factor

The electrical and natural gas energy usage for this facility has been provided by the local utility engineer and

compiled into an energy accounting matrix included in this report in Appendix A. Colorado Springs Utilities

(CSU) provides electrical power to this facility (see Appendix F for electrical rate schedule). Actual utility

invoices were not provided for review, only a compilation spreadsheet including on/off peak usage, demand,

facility access charges, and cost adjustment charges. It is always recommended to closely review utility bills

for calculation mistakes.

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Both consumption (in units kilowatt used per hour or kWh) and demand charges (kW) are itemized all monthly

electric bills. The demand charge may be explained as an ―overhead‖ charge to compensate for the capacity of

the electrical infrastructure brought to the facility. Demand in kW is measured as the peak usage at 15 minute

intervals (typical). The electrical unit cost per month is a combined demand (kW) and usage (kWh) as

depicted in the bar chart below.

Chart 1: Comparison of Oct 2009 - 2011 Electric Unit Cost per Month ($/kWh)

December value shall be discarded as it was a partial reading. However, it is noted the unit cost of electricity

in January of 2009 was $0.054; there was a noted increase of over 36% to November of 2011 at $0.074 per

kilowatt hour purchased. Recommend further investigation with Colorado Springs Utilities service

representative to determine the probable cause of this increase.

The chart below indicates the expected decrease in usage during the summer months. During March of 2009,

there may have been above typical activity in research, including heavy environmental chamber use during the

spring break.

Chart 2: Electric Usage Profile October 2009 - 2011

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

Un

it C

ost

($

/kW

H)

2009 2010 2011

70

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kWH

(Th

ou

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2009 2010 2011

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Over the past year, the electrical demand costs have been exceeding the energy consumption costs by an

average of 19% (see table and figure below).

Month Year Usage ($/mo)

Demand ($/mo)

% Diff

NOV 2011 $2,178.77 $2,774.34 27.3

OCT 2011 $2,189.57 $2,772.63 26.6

SEP 2011 $2,124.23 $2,508.57 18.1

AUG 2011 $2,187.20 $2,349.82 7.4

JUL 2011 $2,370.30 $2,730.17 15.2

JUN 2011 $2,356.06 $2,693.35 14.3

MAY 2011 $2,122.56 $2,505.46 18.0

APR 2011 $2,142.35 $2,606.06 21.6

MAR 2011 $2,001.19 $2,360.48 18.0

FEB 2011 $2,196.48 $2,629.45 19.7

JAN 2011 $2,081.88 $2,500.44 20.1

DEC 2010 $2,176.15 $2,670.68 22.7

Year Totals $26,126.74 $31,101.45 19.0

Table 1: Past Year Electrical Costs

The electrical demand charge includes two components, generation demand and consumer demand, both

charge by kVA (1000 volt-amperes, for reactive loads, the voltage and current are out of phase and the volt-

ampere will be greater than the wattage measurement). The demand charge (also referred to as a ―ratchet‖)

was developed for the local utility to recover costs associated with a given level of electric demand; it is

possible to pay a demand charges even if no consumption is recorded for the month. The demand charge

generally includes all costs associated with operating and maintaining a utility's generation, transmission and

distribution systems.

Chart 3: Electrical Demand Profile for October 2009 - 2011

Over the past year, monthly demand costs have averaged $15.61 / kVA (or kW) and contributed to 54.4% of

2011 average $0.0684 / kWH on a unit cost basis.

120

130

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150

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170

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190

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On

Pe

ak D

em

and

(kW

)

2009 2010 2011

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Power factor (PF) in simple terms is an efficiency measure of electrical power delivery to the customer. In

technical terms, the power factor is defined as the ratio of ―real power‖ for consumed by electrical loads (kW)

to the apparent power (kVA) in the load circuit. A load with a low PF draws more current than a load with a

high PF for the same amount of useful power transferred, but the utility customer is only billed for the power

used. Since a power factors below 1.0 requires a utility to generate more than the minimum volt-amperes

necessary to supply the real power (kW), this results in increased generation and transmission costs.

Consequently, Colorado Springs Utilities charges additional costs to customers with a lagging power factor

below ninety-five percent (95%) or for a leading PF.

Figure 2: Snapshot from BAS Submeter

Power factor correction devices may be installed at service entrance at for the electrical distribution system or

installed at the equipment or VFD. This will be investigated further during the next phase.

Natural Gas Costs and Usage

Natural gas is supplied from Olin Hall over to the Barnes science center; for measurement verification of

energy usage, it is recommended to consider a pulse-type submeter.

Energy Meters

During the spring of 2011, CC Facilities Management installed Btu meters for building HTHW and CHW in

key campus facilities which measure flow with a non-intrusive ultrasonic flow meter and system supply and

return temperatures utilizing RTD sensors with 0.03 °F accuracy. Data recorded from April of 2011 to last

month is included in the facility energy accounting matrix of Appendix A.

Baseline Energy Usage

Energy use index (EUI) is an industry standard indicator defined as a measurement of the total energy used in a

building (or facility) for a specific period of time stated in terms of one thousand British thermal units (kBtu)

per gross conditioned square foot per year (Btu/sf/yr).

The EUI calculated for the period of April 2011 through November 2011 includes electricity, gas, and central

plant high temperature hot water and chilled water. Information from the missing months extrapolated based

on normalized weather data.

The electrical and natural gas energy usage and energy costs for this facility have been collected for fiscal year

2009 through November 2011, calculated as total energy performance, and are depicted in graphs below.

Chart 4: Energy Usage Profile Oct 2010 through Sept 2011

Snapshot PF = 0.86; a

lagging power factor

below 0.95 is in the

utility penalty zone.

Peak demand value

for recorded by BAS

does not coincide with

utility measured value

Forthcoming

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Weather impacts the energy performance of a building; the chart below attempts to demonstrate relationship

between the building utility (electricity and gas) consumption and weather (HDD – Heating Degree Days

below 65°F).

HDD (heating degree days for a base temperature of 65°F)

Energy Usage (kBtu)

Chart 5: Energy Usage Comparative to Weather Conditions One Year Starting November 2010

Benchmarking

The value of an energy usage benchmark is to set a baseline for comparison to an implemented ECM. Also,

benchmarks are used to assess this facility with an ―average‖ building of the same type to provide a level to

comparison.

EPA Energy Star Portfolio Manager

At this time, laboratory/classroom buildings are not included in the Energy Star portfolio and cannot be rated

for comparison with peer facilities, the only higher education facilities are dorms / residence halls.

CBECS

The Commercial Buildings Energy Consumption Survey (CBECS) is a national sample survey that collects

information on the stock of thousands of U.S. commercial buildings, their energy-related building

characteristics, and their energy consumption and expenditures. CBECS was first conducted in 1979; the

eighth, and most recent survey, was conducted in 2003. Although CBECS is currently conducted on a

quadrennial basis, the 2007 Commercial Buildings Energy Consumption Survey (CBECS) has not yielded

valid statistical estimates. Unfortunately, similar to Energy Star, CBECS does not collect data for Higher

Education facilities except for specific use such as dormitory-residence halls.

Energy Cost Reduction Measures (ECM)

Objectives

After benchmarking baseline energy use for whole building, the RCx team accomplished the next tasks:

Performed preliminary walk-through survey to provide the information needed to identify low-

cost/no-cost operations, maintenance, and energy cost reduction opportunities relevant to the

specific building or buildings.

Evaluated energy conservation opportunities for expected savings, estimated implementation costs

(including any design work required), risks, and non-energy benefits (e.g., improved system

operation, better indoor comfort).

Recommended a number of energy cost reduction measures for implementation.

Also identified a number issues or deficiencies to be categorized as repair and maintenance items,

and opportunities for capital improvement projects.

Forthcoming

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ECM Master Findings List

The Master List found in Appendix C includes all ECMs considered during the preliminary assessment

process. The development of the Master List includes a brainstorming effort to catalogue all reasonable energy

reduction opportunities. Based on previous experience, only measures with reasonable paybacks were

included in this list.

Capital Improvement Projects (CIP)

Opportunities

Retro-commissioning a facility methodical may prevent the need for expensive capital improvements;

however, RCx is only the first step in improving the facility’s performance. Potential capital improvements

may be recommended during the RCx process, then deferred with a timetable for planned implementation as

funding is made available.

CIP Master Findings List

Potential capital improvement projects are also included in Appendix C to be discussed with facilities

management prior to proceeding with further evaluation.

Fume Hood Controls

ASHRAE Standard 90.1-2007 prescriptive compliance item 6.5.2.7 requires

buildings with fume hoods having a total exhaust rate greater than 15,000

CFM shall incorporate one of three solutions: (1) VAV hood exhaust and

room supply systems capable of producing exhaust the makeup air by 50% or

less the design values; (2) Direct makeup (auxiliary) air supply equal to at

least 75%of the exhaust rate, heated no warmer than 2°F below room

setpoint, cooled to no cooler than 3°F above room setpoint, no humidification

added, and no simultaneous heating and cooling used for dehumidification

control; or (3) heat recovery systems to precondition makeup air from fume

hood exhaust (similar to the system employed at Barnes Science Center).

Fume hood controls reduce energy use by monitoring sash height and

correspondingly regulating the amount of airflow into the hood at a face

velocity of 100 fpm. As the exhaust air flow reduces, the makeup air system

correspondingly decreases flow to adjust building pressurization to maintain setpoint. Assuming a 5’

operational fume hood exhaust volume averages 1000 cfm at 24‖, lowering the sash height of 25 hoods during

non-use could correspond to a reduction of 22,500 cfm or a corresponding savings of $70,000 a year. The

recommended industry high-performance standard is the Phoenix Valve, which has a retrofit cost of $12,600

per hood plus lab manifold exhaust VFD control, or a 4.5 year simple payback.

Repair and Maintenance (R&M)

Objectives

During the preliminary walk-through survey, existing building energy systems, equipment, or components in

need of repair and maintenance were also identified and documented in the R&M Master Findings List. As the

project progresses through the investigation phase, additional items will most likely be added to the list.

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Systems and Equipment Condition Analysis and Assessment

An important aspect of operation and maintenance engineering systems is assessing equipment condition. For

complex systems, it may be necessary to monitor several conditions (e.g., temperature, vibration, and load) so

that the overall condition can be assessed.1 The initial assessment steps include:

a) Determine if deficiency is occurring at more than one location;

b) Determine frequency of occurrence;

c) Determine if issue impacts other systems, subsystems, or components.

After the assessment of the deficiency, the problem is analyzed thus:

a) Review all aspects of identified issue;

b) Consider alternate solutions;

c) Recommend appropriate corrective action.

At this preliminary walk-through stage of the retro-commissioning process, observations were recorded in

Appendix D Photo Log of Identified Deficiencies and Opportunities. During the next stage, identified

deficiencies will be further developed with recommendations and estimated costs for ECM improvements or

estimated capital improvement upgrade or replacement costs.

HVAC Systems

HVAC equipment at the facility appears to be adequately maintained. A list of service work orders were not

provided for this facility to review. Reference Appendix D for noted deficiencies and H for tables indicating

service lives for various HVAC equipment.

Lighting Systems

All lighting fixtures typically in need of repair, maintenance, or lamp replacement appear to have previously

identified and reported by staff per proper protocol. Few lamps or ballast were observed to require

replacement, and may have been corrected prior to issuing this report.

Building Envelope

Major building envelope improvements are typically too expensive to implement. Appendix I includes some

thermographic imaging performed in conjunction with Olin Hall. The majority of easily correctable

deficiencies include door realignment in jamb and replacement of worn weather-stripping (photo below is a

sample of observations made).

Photo 7: Door Leading to South Observatory Deck

1 2007 ASHRAE Handbook—HVAC Applications

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It appears the design intent for the observatory was to isolate its heat loss by installing weather stripping at the

corridor entrance. During the preliminary site assessment, partition wall insulation and additional insulation

separating the space below was not verified, it is recommended to be reviewed during a retro-commissioning

process.

Photo 8: Observatory Dome

Next Steps

ASHRAE Level II Energy Audit

An ASHRAE Level II Energy Audit is not recommended for this facility. It is recommended to proceed

directly to the retro-commissioning process.

Investigative Retro-Commissioning Phase

The calculation of potential savings, payback of appropriate energy conservation measures (ECMs), expected,

and estimated cost to implement will be performed during the investigative phase. Investigative retro-

commissioning phase efforts may take from 2 to 3 days per site. More capital-intensive retrofit opportunities

incidental to the commissioning assessment may be identified. For a more accurate comparison of alternate

ECMs, a more comprehensive economic analysis may be warranted.2

2 2007 ASHRAE Handbook—HVAC Applications 36.10

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Page 16

Report Intelligence

Abbreviations, Acronyms and Units

The following are common industry abbreviations, acronyms, and units of measure used in this document: AFUE: Annual Utilization Fuel Efficiency

AHU: Air Handling Unit

ASHRAE: American Society of Heating, Refrigeration

and Air Conditioning Engineers

Btu: British thermal unit

BtuH: British thermal unit per Hour

BAS: Building Automation System

CAV: Constant Air Volume

CBECS: Commercial Building Energy Consumption

Survey

CFL: Compact Fluorescent

CFM or cfm: Cubic Feet per Minute

COP: Coefficient of Performance

DDC: Direct Digital Control

DHW: Domestic Hot Water

DX: Direct Expansion

ECM: Energy Cost Reduction Measure

EMS: Energy Management System

EPDM: Ethylene Propylene Diene Monomer

ERV: Energy Recovery Unit

EUI: Energy Use Index

FC or fc: foot-candle (unit of light intensity)

FY/CY: Fiscal Year/Calendar Year

GPM: Gallons per Minute

Hour: hr

HTHW: High Temperature Hot Water

HEX: Heat Exchanger

HVAC: Heating Ventilation and Air Conditioning

kBtu: One Thousand British Thermal Units

kW: Kilo-Watt

kWh: Kilo-Watt hour

LCCA: Life Cycle Cost Analysis

LED: Light Emitting Diode

LPD: Lighting Power Density

MAU: Makeup Air Unit

MBH: Thousand British Thermal Units per hr

MMBtu: Million British Thermal Units

NPV: Net Present Value

O&M: Operation and Maintenance

PSA: Preliminary Site Assessment

PV: Photovoltaic

RTU: Rooftop Unit

SEER: Seasonal Energy Efficiency Rating

SIR: Savings to Investment Ratio

SOW: Scope of Work

SPP: Simple Payback Period

TAB: Testing Adjusting & Balancing

TOD: Time of Day (scheduling)

Therm: 100,000 BTU+

VAV: Variable Air Volume

VFD: Variable Frequency Drive

W: Watt

Disclaimer

This Preliminary Assessment Report contains proprietary, confidential, and privileged information

specifically intended for our client. The intent of this report is to provide a preliminary evaluation of the

potential energy and demand savings with energy efficiency conservations measures evaluated for this

facility. The conclusions noted in this report are believed to be reasonably accurate relative to the standard of

care for this industry; however, dependent upon implementation, the actual energy savings results may vary.

BESECx will assume no responsibility for any loss, injury, or damage resulting from, or occurring in

connection with, the use of information contained or referred to in this report.

Revision History

A building energy assessment is a snapshot of conditions that exist during the analysis. The table below

documents any revisions that occur during the assessment process.

Vers Date Description milestones

0.1 16 January 2012 peer reviewed by P.E., CEM, CxA, draft

0.2 16 January 2012 provided to CC Facilities Mgmt for preliminary review final draft

1.0 Report Released Client review

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Barnes Science Center, Colorado College APPENDIX A

Page A-0

ENERGY ACCOUNTING

The overall purpose of the accounting matrix on the following page quantifies all the energy streamsentering the facility from available data over the past 1 to 2 years. The key element to note is the EUI(Energy Use Index or also known as Energy Use Intensity or even Energy Utilization or Usage Index)which quantifies all the energy consumed within a building into a common unit (Btu) divided by its totalsquare feet.

Please refer to spreadsheet next page.

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EUI Energy Accounting

Utility: Nat Gas Utility: Colorado Springs Utility

Acct No.: Gas Utility Acct No.:

Electric Meter No: Gas Meter No:

71,402 sf Rate Schedule: ETL (EMC) Gas Rate Schedule: G1C

Years: 2009 - 2011 Gas HVAC

Month Year#Days

/bill

Usage

(kWH)

Peak

Demand

On-Peak kW

($/mo)

Off-Peak

($/mo)

kWH Use

($/mo)

ECA+AC

($/mo)3

Billed Cost

($/mo)4

Unit Cost

($/kWH)

Energy

(kBtu)

Load

Factor5

Use

(ccf)

Energy

(kBtu)Cost

HTHW

(kBtu)

CHW

(kBtu)

Energy

(kBtu)

Consumed

(kBtu)Cost of Energy

EUI

(kBtu/sf)

Cost

($/sf)

DEC 2011 - 80,000 170 $2,400.00 $100.00 $2,000.00 $200.00 $4,000.00 $0.0500 272971 1 0.00 $0.00 648353 0 648,353 921,324.2 $9,186.82 12.90 $0.13

NOV 2011 31 85,350 175 $2,591.35 $182.99 $2,178.77 $415.80 $6,290.69 $0.0737 291226 0.654 0.00 588173 0 588,173 879,399.1 $10,996.07 12.32 $0.15

OCT 2011 32 87,150 169 $2,608.30 $164.33 $2,189.57 $425.40 $6,328.82 $0.0726 297368 0.671 0.00 359560 139388 498,948 796,316.1 $9,832.55 11.15 $0.14

SEP 2011 29 80,550 165 $2,474.56 $34.01 $2,124.23 $347.36 $5,850.10 $0.0726 274848 0.702 0.00 256230 404307 660,537 935,384.4 $9,719.32 13.10 $0.14

AUG 2011 30 81,750 149 $2,310.97 $38.85 $2,187.20 $317.25 $5,737.17 $0.0702 278942 0.759 0.00 208160 558442 766,602 1,045,544.4 $9,915.44 14.64 $0.14

JUL 2011 29 87,600 178 $2,730.17 $0.00 $2,370.30 $332.40 $6,378.95 $0.0728 298903 0.707 0.00 222825 548872 771,697 1,070,600.1 $10,631.47 14.99 $0.15

JUN 2011 32 88,800 159 $2,693.35 $0.00 $2,356.06 $343.20 $6,351.65 $0.0715 302998 0.726 0.00 329500 160006 489,506 792,503.6 $9,707.67 11.10 $0.14

MAY 2011 29 79,200 163 $2,505.46 $0.00 $2,122.56 $116.03 $5,599.41 $0.0707 270241 0.696 0.00 424405 59616 484,022 754,263.2 $9,262.93 10.56 $0.13

APR 2011 29 77,850 170 $2,606.06 $0.00 $2,142.35 ($86.10) $5,503.09 $0.0707 265635 0.658 0.00 93988 22489 116,477 382,112.1 $6,356.20 5.35 $0.09

MAR 2011 29 74,700 154 $2,360.48 $0.00 $2,001.19 ($79.80) $5,088.63 $0.0681 254887 0.697 0.00 300000 0 300000 554,886.9 $7,488.63 7.77 $0.10

FEB 2011 32 85,800 160 $2,496.05 $133.40 $2,196.48 ($422.46) $5,469.55 $0.0637 292762 0.700 0.00 500000 0 500000 792,761.6 $9,469.55 11.10 $0.13

JAN 2011 29 81,000 171 $2,288.79 $211.65 $2,081.88 ($473.10) $5,146.02 $0.0635 276383 0.682 0.00 500000 0 500000 776,383.3 $9,146.02 10.87 $0.13

Subtotals 331 989,750 165.3 $30,065.54 $865.23 $25,950.59 $1,435.98 $67,744.08 $0.0684 3,377,166 0.692 0 0.00 $0.00 4,431,194 1,893,120 6,324,314 9,701,479 $111,712.67 135.87 $1.56

DEC 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

NOV 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

OCT 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

SEP 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

AUG 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

JUL 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

JUN 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

MAY 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

APR 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

MAR 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

FEB 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

JAN 2010 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

Subtotals 0 0 #DIV/0! $0.00 $0.00 $0.00 $0.00 $0.00 #DIV/0! 0 ###### 0 0.00 $0.00 0 0 0

DEC 2009 34 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

NOV 2009 31 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

OCT 2009 32 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

SEP 2009 28 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

AUG 2009 30 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

JUL 2009 29 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

JUN 2009 32 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

MAY 2009 30 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

APR 2009 29 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

MAR 2009 31 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

FEB 2009 29 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8] JAN 2009 30 #DIV/0! 0 ###### [8] [8] [8] [8] [8] [8] [8]

Subtotals 365 0 ####### $0.00 $0.00 $0.00 $0.00 $0.00 #DIV/0! 0 ###### 0 0.00 $0 0 0 0

[1] Utility measured kW On-Peak at 15 minute intervals [6] HDD: Fahrenheit-based heating degree days for a base temperature of 65F (est. avg error = 0.8%)

[2] Monthly Power Factor data not availble [7] CDD: Fahrenheit-based cooling degree days for a base temperature of 65F (est. error = 0.4%)

[3] Electric Cost Adjustment plus Access Facility Daily Charge [8] Electrical meter installed in June of 2009; Btu Meters installed winter of 2011

[4] Billed cost is monthly service charge, not sum of usage, demand, and ECA charges. [9] Quantifying accurate central plant Btu costs in progress; assumed HTHW @ $8.00 /MMBTU & CHW @ $4.50 /MMBTU

Energy Use Index

Facility:

Address:

City|ST|Zip:

Gross Area:

Barnes Science Center, Colorado College

1040 N Nevada Ave

Colorado Springs, CO 80903

Colorado Springs Utility

9604956600

544004

None – verify

Electricity Totals

Work in Progress Page A-1 of 1

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Barnes Science Center, Colorado College APPENDIX B

Page B-0

ENERGY STAR RATING

Fiscal year 2009 utility data was entered into the EPA Energy Star Portfolio Manager database resultingin the report include on the pages to follow.

One purpose of the Energy Star “STATEMENT OF ENERGY PERFORMANCE” is to compare to othersimilar buildings using the Environmental Protection Agency’s (EPA’s) Energy Performance Scale of 1–100, with 1 being the least energy efficient and 100 the most energy efficient. However, at this time,higher education facilities except for dorms / residence halls are not rated.

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Barnes Science Center, Colorado College APPENDIX C

Page C-0

MASTER FINDINGS LIST

The overall purpose of the Master List of Findings is to identify improvement measures including ECM’s,R&M’s, and CIP’s that upon implementation will improve building and system performance to meet theOwner’s project requirements of energy and O&M cost reduction, and/or improve the indoorenvironmental quality.

Please refer to spreadsheet next page.

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ECM Description Issue / Deficiency / Opportunity Recommended ImprovementEstimated Cost

Range [1]

1

Fume Hood Face

Velocity Exhaust Control

Fume hoods are notorious energy consumers in all

academic and research laboratories.

Approximately 8 existing fume hoods have been successfully

retrofitted with Siemens Fume Hood Controllers interlocked with a

variable volume exhaust damper. Recommend retrofitting remaining

27 fume hoods.

$7500 to $11,500

per fume hood

2

PF (Power Factor)

Correction

CSU penalizes customers for lagging PF as described in

the Electrical Costs, Usage, Demand, and Power Factor

section of the Preliminary Site Assessment, this facility

has recorded a lagging PF below 0.95 (refer to report

and Appendix A Energy Accounting Matrix).

Investigate power factor correction devices including an automatic

device (capacitors switched by contactors) at service entrance and at

motors to decrease the magnitude of reactive power.~$10,000

(Berwick Electric

currently

estimating)

3

Retro-commissioning

with focus on Control

Sequence Tune-up and

Optimization

Observed existing control strategies that may not be

providing optimum control for thermal comfort and

energy savings, such as adjusting setpoints, increase

deadband, economizer control, optimum start/stop,

staging, hot/cold deck reset, etc. Heating setpoint

dropped to 68°F on 7 November 2011 with significant

results; refer to ECM section of Preliminary Site

Assessment report for detail.

Perform DDC control optimization by point-to-point commissioning to

ensure correct operation for each HVAC system. Review all

sequences for occupied, unoccupied, warm-up, and cool-down

modes of operation for AHU’s. Studies conducted by LBNL

(Lawrence Berkeley National Laboratory) and PECI (Portland Energy

Conservation, Inc.) indicate retro-commissioning services result in

energy cost savings ranging from 5% to 30%.

$9,500 to $18,000

depending on the

depth & rigor of

RCx scope

4

Owner Training for

Systems

Recommissioning

O&M staff may not have readily available resources to

judge if existing building energy systems are operating

per design intent or at optimized and tuned steady-state.

Provided tuned system parameter benchmarking to maintenance

personnel after retro-Cx. Provide additional training to maintenance

personnel on tuned systems to ensure optimal system operation.

$9,500 to $18,000

depending on the

depth & rigor of

RCx scope

5

TAB Services & Building

Pressure Static Control

Tune-up

During the post-construction test, adjusting, and

balancing of the system, the TAB contractor provides the

temperature controls contractor a static pressure value

required to ensure the farthest VAV terminal unit is

supplied adequate pressure to operate at the design

airflow.

For this project, a 1.0 inch w.g is utilized as the target static pressure

according to the documented sequences of operation. Recommend

validation during retro-commissioning process through system air re-

balancing, measurement, and validating if this static pressure

setpoint values could be reduced.

Certified TAB

contractor up to

$20,000

depending on the

depth & rigor of

TAB scope

6

Premium Efficiency

Motors

Based on accelerated testing of motor insulating

materials, life expectancy of electric motors averages 15

to 17 years. AHU-D motor and a couple others have

already been upgraded by attrition.

Recommend replacement of 5 hp+ with NEMA Premium efficiency

motors; smaller motors by attrition. Cost avoidance (an action taken

in the present designed to decrease costs in the future) may be

considered in energy cost reduction calculations.

Installed cost of

(1) premium 10 hp

motor estimated at

$2400

7

Sensor Location

Optimization

Wall sensors in some classrooms are across room from

RA grille and may not be measuring representative

space temperature.

Review feasibility of relocating sensors to optimum location or return

air openings to augment light fixture slots. Include in retro-

commissioning

scope

RCx Preliminary Assessment Phase Issues Log Project: Barnes Science Center

APPENDIX C

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8

Reduce HVAC operating

time / Optimize TOD

(Time of Day) Schedules

Observed several unoccupied spaces in the occupied

mode for relatively long durations.

Recommend review of BAS TOD schedule operating parameters for

occupied periods including coordination with the weekly published

"Colorado College Room Usage and Equipment Requirements".

Also recommend space overrides and possibly multiple unoccupied

setpoints.

Include in retro-

commissioning

scope

9

HWP Differential

Pressure Setpoint

Optimization

Often VFD setpoint values for differential pressure

setpoints are set arbitrarily during construction.

Recommend measurement and validation of optimum pressure drop

across furthest or worst case heating coil, and tune the sequence of

operation.

Include in retro-

commissioning

scope

10


time / Optimize TOD

(Time of Day) Schedules


mode for relatively long durations; observed AHU A-I

occupied schedule programmed for Sunday through

Saturday, 7:00 a.m. to 6 p.m.

Recommend review of BAS TOD schedule operating parameters for

occupied periods including coordination with the weekly published

"Colorado College Room Usage and Equipment Requirements".

Also recommend space overrides and possibly multiple unoccupied

setpoints.

Include in retro-

commissioning

scope

11

Optimum Start-Stop

Control Strategy

Optimal start-stop is a control strategy that compares the

occupied-period setpoints with the actual space

temperature and determines how long it will take to

recover to setpoint; this algorithm reduces fan system

operation by about 5-10% while ensuring that space

temperatures are at setpoint prior to occupancy.

Optimize HVAC system start /stop time through a PID algorithm to

bring building within specified comfort parameters by scheduled

occupied time and "coast" system to unoccupied period. Note

ASHRAE Standard 90.1 mandates optimal start-stop control of all fan

systems over 10,000 CFM in capacity to eliminate unnecessary

heating.

Include in retro-

commissioning

scope

12

Outdoor Air Delivery

Monitoring with Air Flow

Measuring Stations

"To measure is to know" (Lord Kelvin). Air handlers may

be over-ventilating both unoccupied and occupied

spaces.

Air flow stations shall utilize thermal based air measurement. The

sensor accuracy shall read airflow rates within ±2% of reading with

±2% repeatability

and temperature within ±0.15 deg F.

Estimate available

upon request

13

HW Coil PD (pressure

drop) reduction

Fouled AHU HW and CHW coils increase airflow

resistance and fan energy up to 20%.

Recommend measuring pressure differential across coil and

chemical or steam clean coils per industry standard to reduce fan

energy.

Estimate available

upon request

14

Greenhouse

Environmental Control

Systems Optimization

Observed during operation, a small "dead band"

between heating and evaporative cooling/fan operation.

Recommend system tune-up to match the academic and research

temperature and humidity requirements of each greenhouse. Estimate available

upon request

15

Reduce Duct Leakage On average, almost 15% of cooling energy is wasted

due to HVAC system air leakage; some studies have

quantified energy costs due to duct leakage as high as

$5 cfm per year.

Seal existing duct, accessories, and equipment to reduce leakage.

Consider new technology of injecting a fog of aerosolized sealant

particles into a pressurized duct system.Estimate available

upon request

16

Infiltration Reduction Observed gaps at door head, sill, and at jambs. Some

doors appear to be out of plumb requiring adjustments,

new gaskets or resetting (reference APPENDIX D:

Photo Log of Identified Deficiencies and Appendix I

Infrared Thermography).

Replace all head and jamb seals, and sill sweeps (Refer also to R&M

(Repair and Maintenance) section regarding door alignment). Caulk

all exterior and interior wall penetrations. Cost estimation to be

performed during RCx Investigation Phase.

Estimate available

upon request

Work in Progress Page C-2 Level I

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17

Lighting Retrofit /

Upgrades

Observed incandescent & original building T-12

fluorescent fixtures in mechanical spaces.

Upgrade all remaining fluorescent fixtures with T-12 lamps and

magnetic ballasts with T-8 25W lamps and electronic ballasts. Estimate available

upon request

18

Lighting Optimization &

Capacity Reduction |

Corridors, Toilets &

Stairwells

Lighting fixtures have been upgraded to indirect T-8

fixtures (reference APPENDIX D: Photo Log of

Identified Deficiencies).

IESNA (Illuminating Engineering Society of North America)

recommends 10-15-20 fc for areas of egress. Safety issues trump

energy cost reduction, however, de-lamping existing fixtures should

be reviewed. Recommend measuring illumination levels throughout

building to identify spaces above IESNA Lighting Handbook levels

and ANSI / ASHRAE / IESNA Standard 90.1-2004 densities. Review

opportunity to add split ballast switching, occupancy sensors, de-

lamping, etc. to reduce the lighting runtime based on need.

Estimate available

upon request

19

Light reduction controls

per IECC 505.2.2.1

For areas not controlled by an occupant-sensing device,

it is required to have a manual control to also allow

occupants to reduce the connected lighting load in a

reasonably uniform illumination pattern by at least 50

percent.

Per IECC 2006, 505.2.2.1 Lighting reduction may be achieved by

dual switching of alternate rows of luminaires, alternate luminaires or

alternate lamps; switching the middle lamp luminaires independently

of the outer lamps; switching each luminaire or each lamp; or other

methods.

Estimate available

upon request

20

Lighting Controls |

Classrooms, Restrooms,

Storage, Offices

Utilize dual technology type occupancy sensors to reduce lighting

runtimes based on need. Also consider lighting occupancy controls

for some spaces to combine daylight-harvesting control to turn lights

off or to dim when enough ambient daylight is available while room is

occupied.

Estimate available

upon request

21

Pneumatic Compressed

Air System leakage

reduction

Air leakage in pneumatic control system results in lower

end-of-line pressures and loss of control.

Recommend isolating and repairing leak, and verifying proper

operation. A single 1/32" diameter hole leaking 1 scfm at $0.06 kWh

costs expends over $100 per year of electrical costs. Estimate available

upon request

22

Lab Exhaust

Optimization

The number of air changes in the original design may

not correspond with actual use of laboratories and

classrooms.

Recommend studying design intent and verifying actual design

implementation or if adjustments have been made during

recommended retro-commissioning process

Recommend

including in RCx

scope

23Cogged Belts Observed fan motor belts are standard V-type. Cog type belts fit in standard sheaves and can reduce up to 2%

power consumption. Recommend switching on an attrition basis. Estimate available

upon request

24

Replace OA Fan & Zone

Exhaust with Heat

(energy) Recovery

system

Make-up air ventilation systems require large amounts of

energy during heating season to temper air for space

comfort levels.

Review countercurrent heat exchange solutions that recover energy

between the inbound and outbound air flow. Estimate available

upon request


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25

Measurement &

Verification Through

Submetering

To reiterate, "To measure is to know" (Lord Kelvin).

Currently unable to quantify building process loads from

HVAC fans and pumps and lighting.

Recommend monitoring device (Lon compatible if possible to match

CC standards) to measure true RMS Power in Watts, power factor,

and energy in Watt-hours plus peak demand in ratchet periods.

Accumulation of energy data for analysis is important for ECM cost

allocation.

Recommend

including detailed

M&V plan in RCx

scope

26

Owner Training for

systems

Recommissioning

O&M staff may not have readily available resources to

judge if existing building energy systems are operating

per design intent or at optimized and tuned steady-state.

Provided tuned system parameter benchmarking to maintenance

personnel after retro-Cx. Provide additional training to maintenance

personnel on tuned systems to ensure optimal system operation.

Recommend

including in RCx

scope

27

Lighting Optimization &

Capacity Reduction

New IESNA data indicates spaces occupied by

populations under 25 years old may be over illuminated.

Consider de-lamping spaces over lit by IENSA standards accordingly

to space needs.Recommend

review by CC FM;

perform in-house

28

HW Demand Reduction Domestic hot water is furnished via HTHW heat

exchanger in basement delivered at setpoint 125°F;

recirculation pump control not apparent and recommend

further investigation.

Facilities Management reports installation 1.5 GPM aerators on

lavatories. Recommend review of all low flow aerators on non-critical

lavatory faucets. Tune operation of recirculation pump. Check for

leakage.

Estimate available

upon request

29

Air Filtration Upgrade Large quantity of air (as-built documents lack detailed

mechanical equipment schedules) is filtered during peak

occupancy.

Review opportunity to reduce energy through use of long life lower

pressure drop air filters with equal or better efficiencies than currently

used.

Estimate available

upon request

30

Transformer Upgrade Older dry-type, three phase ventilated transformers

perform at lower efficiencies and have greater heat

losses than current equipment.

Replace original 480 volt to 208/120V electric transformers with new

dry type energy efficient transformers meeting the NEMA TP-1

energy efficiency levels.

Estimate available

upon request

31

Exterior Door Infiltration Of exterior 3-0x7-0 doors sampled, some were out of

alignment with air gaps at jambs and worn weather-

strips around door (refer also to appendix C).

Realign doors then replace all weather strip and threshold sweeps.

Remove existing caulk, clean prep and re-caulk at jamb.No to low cost if

performed by FM

CC

32

Vending Machine

Economizers

Campus building occupancy rates average 33%

annually; vending machine lights and compressors

typically operate 8760 hrs / yr. A typical vending

machine costs $300 of electricity per year to operate.

Recommend Vending Miser or equal device to power down a

vending machine during unoccupied periods and automatically

repowers the vending machine when the area is reoccupied. An

intelligent controller uses fuzzy logic to learn from the habits of the

building occupants, and modifies the time-out period accordingly.

$250; typ.

payback < 2 years

33

Plug Load Reduction Observed lab equipment, laptops, PC monitors, etc. on

during unoccupied evening hours. On an individual

basis, power consumption is minimal, however, an

accumulated wattage from dozens of pieces of

equipment left on when not in use is significant.

Recommend utilizing a student team to survey facility for PC's, lab

equipment, monitors, copiers, printers, speakers, etc. operating

unnecessarily in the standby mode, after hours or weekends. Also,

recommend cataloging by spreadsheet devices consuming standby

power in "sleep" mode.

No cost if

managed

internally


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34

Behavioral Modification Operational changes such as turning off lights when

daylight is adequate or turning off lights during

unoccupied periods may result in significant energy

reduction.

Implement reward program to reduce energy consumption via

behavioral modification of facility occupants, i.e. turning off lights,

equipment, PCs when not in use.

No cost if

managed

internally

NOTES

[1]

[2]

ECM's are not necessarily interactive.

ECM cost estimation source is RS Means.


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CIP Description Issue / Deficiency / Opportunity Recommended ImprovementEstimated Cost

Range [1]

1

BAS Upgrade from DDC-

Pneumatic hybrid

Current energy management control system is a Siebe

Environmental Control DMS-3500 DDC-Pneumatic

hybrid; DMS system is several DDC generations old,

and manufacturer is no longer producing replacement

parts or directly supporting equipment.

DDC systems solid-state sensors and controllers offer considerable

energy-efficiency advantages over conventional pneumatic systems.

Substantial savings are realized in calibration and maintenance, but

the critical value lies in the accuracy and reliability of the DDC

systems. These features can yield operational energy savings of 15%

Long Technology

2

Demand Control

Ventilation (DCV)

Observed several classrooms, faculty offices,

observatory, work areas, etc. not occupied during

scheduled BAS occupancy times. Monitoring occupant

emitted carbon dioxide to quantify occupancy and

accordingly modulate outdoor air dampers to adjust

ventilation rate appropriate to the condition.

Investigate feasibility of CO2 sensors to monitor the average level in

relation to the outdoor level in assembly and other key spaces at the

breathing level of 48" to 60" above finish floor for input to modulate

OA dampers to maintain CO2 setpoint per ASHRAE 62.1.(Waiting on cost

estimate from

Aircuity rep)

3

Building & Lab Air

Handling Units

Existing air handler unit age approaching 24 years;

median service life of an AHU is 20 years.

Recommend complete refurbishment of AHU.

Estimate pending

4

Anatomy/Science Lab

And Animal Suite

Existing system age including heat wheel approaching

24 years; one disadvantage to heat wheels is the

potential for cross contamination due to leakage or

wheel surface carryover.

Consider heat recovery system utilizing pumped coils.

(Waiting on cost

estimate from

Konvecta rep)

5

Scientific Equipment

Upgrades: Ultra-low

refrigeration equipment

Some refrigeration equipment observed to be passed

expected service life.

Consider upgrades to higher efficiency equipment. Also refer to

manufactured data included in appendix J.Request faculty

support for cost

estimation

6


Upgrades: environmental

chambers

Laboratory environmental chamber equipment observed

to be passed expected service life. Please reference

appendix C photo log of deficiencies and opportunities.

Consider upgrades to higher efficiency equipment. Also refer to

manufactured data included in appendix J. Request faculty

support for cost

estimation

7


Upgrades: Biological

Incubator

Laboratory incubator equipment observed to be passed

expected service life.

Consider upgrades to higher efficiency equipment.Request faculty

support for cost

estimation

8

Low Flow Fume Hoods Exhaust systems in academic and research laboratories

combined with the conditioned air required to replenish

and pressurize the buildingis a source of great energy

consumption.

Constant volume low flow fume hood manufacturers include

LabCrafters Inc. & Berkeley Hood. Request faculty

support for cost

estimation

Project: Barnes Science Center RCx Preliminary Assessment Phase Issues Log

APPENDIX C

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Project: Barnes Science Center RCx Preliminary Assessment Phase Issues Log

9

Roof Insulation Upgrade Roof replacement project possibly budgeted for future

capital project (current roof estimated at 8 to 10 years

old) [verify]; replacement projects are an excellent

opportunity to add insulation cost effectively.

Provide additional layer of rigid roof insulation as part of a re-roofing

capital project. Further investigation into campus master plan

required during next phase prior to cost estimation and

recommending improvement.

May include spray

foam on the

underside of the

top floor deck

10

Unoccupied/Occupied

Air Change Rates for

Labs

Forthcoming Forthcoming

Forthcoming

11


time / occupancy

sensors


mode for relatively long durations.

Recommend incorporating classroom & lab occupancy sensors to

both reduce or turn off lighting and adjust space setpoint to

unoccupied accordingly.

Recommend

including in BAS

upgrade scope

12

Greenhouse Window

Replacement

The existing greenhouse window systems appear to be

single glazed [CC FM Gary Griffin to verify]

The costs of new replacement windows for any facility may be

difficult to justify for a capital improvement project. After verification,

cost estimation

during offered

during next phase

NOTES

[1] CIP ROI calcs and labor/material cost estimation provided in next phase Level II Energy Audit or RCx.


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Barnes Science Center, Colorado College APPENDIX D

D-1 of 18

PHOTO LOG OF IDENTIFIED DEFICIENCIES AND OPPORTUNITIES

Following photos depict finding, issue, deficiency, or opportunity for either an ECM (energy cost

reduction measures) or a R&M item as keyed to Master Finding List.

R&M: Pressure differential gauge not connected, therefore not functional (at least one other gauge observed in this condition).

One of the existing fume hoods have been successfully retrofitted with Siemens Fume Hood Controllers interlocked with a variable volume exhaust damper. Only 8 of the 35 existing fume hoods have been retrofitted to limit face velocity to 100 fpm when not in

use.

Plate and frame heat exchanger located in basement of Barnes required to separate 20% glycol-water chilled water solution due to potential freezing in the semi – insulated perimeter chases of Olin Hall.

15 hp chilled water pump serving Olin Hall observed operating at 50° F outside ambient temperature circulating approximately 70°F water.

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D-2 of 18

New data center dry cooler with economizer; BAS observations indicating operating correctly

Lab exhaust air handler systems exhibit good maintenance practices

Cogged type belts increase efficiencies per manufacturer’s ratings by 2 to 5%

Equipment and piping are well labeled with directional flow arrows

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D-3 of 18

Water damaged fiberglass insulation may reduce

insulating value up to 80%

Building relief fans

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D-4 of 18

Recommend weatherstripping upgrade for mechanical room

door

See photo door below from interior; lab AHU exhaust stack seen from the top of roof

Observed damaged fiberglass piping insulation in several locations; recommend outsourcing a repair program & spreading cost several

facilities

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D-5 of 18

Noted static pressure value below expected clean filter value as documented on

sheet metal

Hot water pump disconnect in off position; advised CC Facilities Maintenance

Probable water leak and building envelope breach

requiring further review

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D-6 of 18

Magnehelic differential pressure gauge not connected

per design intent

Recommend upgrade by attrition all original T12

equipped light fixtures

Observed signs of corrosion at the bottom of unit required attention before unit is breached.

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D-7 of 18

Chilled water system drain down observed during site

visit

Observed several Victaulic fittings lacking insulation; refer to previous comment regarding insulation repair &

upgrade program

The larger lamp manufacturers (Sylvania, GE) are phasing out the type PL 13 fluorescent lamp. Lamp on right has

failed.

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D-8 of 18

Recommend upgrade by attrition all original T12 equipped light fixtures in Greenhouses

Observed stainless steel thermostat covers absorbing and possibly re-radiating to temperature sensor giving false elevated readings; recommend verification on BAS prior to correcting

See comment above

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D-9 of 18

Algae most likely expected in this environment; recommend cleaning heat transfer coil surfaces more often in these spaces.

Ditto, above.

Faculty provided greenhouse climate environment

parameters.

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D-10 of 18

Individual greenhouse environmental control system

independent of the BAS

Sampled accuracy of temperature sensor determined acceptable

Safety issue: Recommend staff electrician to review the missing circuit breaker cover

for subpanel ‘SDP’

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D-11 of 18

Approximately 4 ultra-low temperature -80°C (-112 ºF) scientific application storage freezers located in Barnes

Science Center

Replacement fluorescent lamps currently stored in the

fifth floor closet

Ditto note above

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D-12 of 18

Environmental growth chamber / biological incubator; current equipment used may not be as efficient

as newer models.

Recommend functional testing of lab freezer during retro-

commissioning process

Several pieces of critical lab equipment are on emergency

power

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D-13 of 18

Pair of doors exiting to South deck from the observatory area; recommend door alignment with weather-

stripping retrofit.

Recommend phase out of pneumatic actuators on dampers and coils with low voltage replacement systems

Flexible duct observed decomposing possibly due to misapplication for heat removal from environmental growth chambers; recommend insulated hard galvanized sheet-metal duct.

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D-14 of 18

Prefilter and filter

assembly examined

Recommend labeling light switch or replacing with pilot light to prevent accidental turning off of critical equipment by switching disconnect label

Recommend verification of heat recovery cleaning procedure is followed to maintain heat transfer

effectiveness

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D-15 of 18

Recommend low – leakage damper upgrades as budget allows

Missing section of insulation

post pipe repair

Observed duct liner failure in the air filter assembly

enclosure

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D-16 of 18

Pneumatically controlled inlet vanes for 50 hp building AHU removed and replaced with VFD; actuator abandoned in place

More than adequate space to store empty polypropylene glycol containers in the former chiller mechanical room; note expense of glycol purchased by the drum in order to maintain facility temperature during winter due to poor performing building envelope

Periodic cleaning of air intake systems recommended; Facilities Management may consider tasking to supervised

janitorial staff

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D-17 of 18

15 hp chilled water pump

serving Olin Hall

Another non-insulated pipe

fitting

Recommend airflow monitoring stations CIP with TAB verification and RCx validation of outdoor ventilation and makeup air rates

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D-18 of 18

Stored spare equipment blocking access to water

service entrance

Circuit breaker Lockout for abandoned chiller pump and

the motor control center

Hydronic piping installed above electrical service and

violation of NFPA 70 / NEC

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Barnes Science Center APPENDIX E

Page E-0

BUILDING OPERATION SCHEDULE

The intent of the attached schedule as part of a Facilities Operation Plan is to meet the objective ofoperating a healthy, comfortable, and energy efficient building.

Please refer to next page.

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Science Building Heating and Cooling Schedules (Barnes, Olin, Russell T. Tutt Science Center)

Science Buildings / Areas

Heating Season Days per week Cooling Season Days per week Cooling Season Days per week

Barnes Science Laboratory Classrooms (Note 1,2,3,9 ) 24 hrs per day 7 24 hrs per day 7 N/A N/A

Barnes General Classrooms / Offices 6:00 am - 8:00 pm 7 6:00 am - 8:00 pm 7 Evening & night hours 7

Barnes Anatomy / Science Lab (Note 3,4 ) 24 hrs per day 7 24 hrs per day 7 N/A N/A

Olin Laboratory Classrooms (Note 1,5,6 ) 24 hrs per day 7 7:00 am - 6:30 pm 7 Evening & night hours 7

Olin General Classrooms / Offices (Note 6 ) 24 hrs per day 7 7:00 am - 6:30 pm 7 Evening & night hours 7

Olin Fish Bowl (Note 6) 7:00 am - 6:30 pm 7 7:00 am - 6:30 pm 7 Evening & night hours 7

Olin Laboratory Classroom no. 482 (Note 6) 7:30 am - 6:30 pm 7 7:30 am - 6:30 pm 7 Evening & night hours 7

Tutt Science Center (TSC) Lab Classrooms & Animal Lab (Note 7) 24 hrs per day 7 24 hrs per day 7 N/A 7

TSC North Quadrant (All Floors) Classrooms & Offices (Note 6) 7:00 am - 11:00 pm 6 - (Off on Sunday) 7:00 am - 11:00 pm 6 - (Off on Sunday) Evening & night hours 6 - (Off on Sunday)TSC South Quadrant (All Floors) Classrooms, Labs & Offices (Note 8) 24 hrs per day 7 24 hrs per day 7 N/A 7

General Notes:A. Most building space temperatures are continuously monitored and maintained ranging from 70F - 74F depending upon user requirements and surrounding conditions as indicated by schedule.

C. The chiller plant operates only during warm, summer-like months and is normally turned off each day when the outside air temperature drops below 65-68F. Exception: (Note 3,7,8)

E. Building temperatures may not be uniform as "hot" or "cold" spots may exist.

G. This schedule is provided for information only and may be modified by contacting Facilities Services (X6568 or X6017). Schedule is not intended to include every possibility.

Detailed Notes:

2. Barnes Science Laboratory Classroom nos: Basement: 100, 102,104,106,108,110,116,120,128,130.

Third Floor: 305,303,307,323,325,327. Fourth Floor: 411,413,419,421,423,427,432,430,428,426,424,422,420,418,402. Fifth floor: 511,519,525,527,529,516

3. Barnes Science Laboratory Classrooms and Barnes Anatomy / Science and Animal Labs remain air conditioned spaces throughout the year, 24/7 unless scheduled 'OFF' by user.

5. Olin Laboratory Classrooms are not equipped for A/C throughout the year. Olin Lab space temperatures may vary outside the range between 70-74 degrees F. during the summer.

7. TSC Chemical Labs with Fume & Canopy Hoods and Animal Lab area remain air conditioned spaces throughout the year, 24/7 unless scheduled 'OFF' by user.

8. All spaces on all floors south of the Main Lobby in TSC are served by equipment that serve chemical labs 24/7, year round in addition to the animal lab located north of the lobby.

9. Barnes Science Laboratory Classroom space temperatures are not remotely monitored. Exception: Rooms 423 & 427.

Heating and Ventilation Air Conditioning & Ventilation Ventilation Only

Winter Summer

6. Late evening and/or night hours of operation imply that each space may be cooled by typically 'cool' nighttime outside air as conditions may allow.

B. The heating plant operates 'year round' 24 hrs per day. When requested or scheduled, any building space requiring 'heating' may be accommodated by the building mechanical system.

D. Cool outside air normally provides sufficient cooling for most spaces with the exception of large populated spaces such as lecture halls and theatres. Events in these large spaces should be scheduled with Facilities

Services for mechanical cooling.

4. Barnes Basement Anatomy / Science and Animal Lab Room nos. 109, 121,117,119,121,123,125,127,131,129,115,113. Most rooms have occupancy sensors which save energy by turning off the air supply to the room when

unoccupied. The Anatomy/ Science Lab can also be scheduled "off" by the user when it's not in use or when it's not required.

1. During summer-like conditions, lab experiments requiring 24/7 indoor environmental control are best accommodated in Barnes Science Lab Classrooms and should be coordinated with Facilities Services.

F. Building energy use is minimized by turning systems 'off' or 'setting back space temperatures' in buildings when not in use or when partially occupied. For example: weekdays during evening and/or night time hours of

operation including weekends, block breaks, Christmas break and holidays. This means that the heating/cooling will be scaled back when the building is, for the most part, unoccupied; temperatures may fall or rise

accordingly.

2/6/20128:52 PM SciencesBldgSchedRev6

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Page E-1

APPENDIX E – Equipment and Systems Asset InventoryThe following matrix indicates the specific systems to target for energy assessment, primarily all HVAC, domestic water heating, and lighting systems:

SystemEquipTag

Data Collection

Manufacturer Model No. Serial No Capacity Notes

HVAC Systems

Building Automation BAS

HW Pumps HWP-1:2

Air Handler Unit AHU-A Trane Climate Changer

Air Handler Unit AHU-B Trane Climate Changer

Air Handler Unit AHU-C Trane Climate Changer

Air Handler Unit AHU-D Trane Climate Changer

Air Handler Unit AHU-E Trane Climate Changer

Air Handler Unit AHU-F Trane Climate Changer

Air Handler Unit AHU-G Trane Climate Changer

Air Handler Unit AHU-H Trane Climate Changer

Air Handler Unit AHU-I Trane Climate Changer

Air Handler Unit AHU-J Trane Climate Changer

Air Handler Unit AHU-K Trane Climate Changer

Air Control System AS-1, ET-1

Exhaust Fans EF1

Exhaust Fans EF2

Exhaust Fans EF3

Exhaust Fans EF4

Air Compressor

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Page E-2

Plumbing Systems

Domestic WaterHeating

DWH-1

Storage Tank ST-1

HW RecirculationPump

HWRP-1

Notes:(1) missing info to be populated during next RCx phase

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Barnes Science Center APPENDIX F

Page F-0

Utility Rate Schedules

The table below is a snapshot of the Colorado Springs Utilities electrical rate schedule:

Rate Description$2.40 Access/Facilities charge per day$0.0489 Electric supply on-peak, per kWh$0.0203 Electric supply off-peak, per kWh($0.0020) ECA (Electric Cost Adjustment) per kWh$0.5286 On-peak demand, per kW per day$0.3436 Off-peak demand, per kW per day$0.0108 ECC (Electric Capacity Charge) per kWhNotes:On-peak periods Oct. - March: 4 to 10 p.m. Monday through FridayOn-peak periods April - Sept.: 11 a.m. to 6 p.m. Monday through FridayOff-peak periods: all other hours plus legally-observed holidaysSales tax is assessed unless tax exempt status is filed on record with CSU

Colorado Springs Utilities Natural Gas rate schedule snapshot:

Std Rate Seasonal Description$0.6037 $0.6251 Access charge per day$0.1276 $0.1073 Access charge per CCF$0.6034 - Natural gas cost per CCF

- $0.6597 Natural gas cost Nov. - Apr. per CCF- $0.5225 Natural gas cost May - Oct. per CCF

($0.0550) ($0.0550) Gas Cost Adjustment (GCA), per CCFnote 3 State sales taxnote 3 City sales taxnote 3 County sales tax

Notes:1) 12.01 PSIA pressure base2) Sales tax is assessed unless tax exempt status is filed on record with CSU3) recommend verification through utility billing access

Please refer to next pages for rate schedules.

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Armstrong Hall, Colorado College APPENDIX G

G-1 of 1

Facility Documentation ChecklistProject: ASHRAE Level I & II analysis

Building: Armstrong Hall

Location: 14 E. Cache La Poudre, Colorado Springs, CO 80903

Updated: 31 October 2011

Building DocumentationDescription Notes

Available

Record Drawings (as-builts) 1966 HVAC only; data center mods 1

Record Dwgs of minor alterations Data Center only

Utility Usage (past 3 years minimum) spreadsheet furnished

Utility bills (copies of recent) 8 samples

Utility provider data

Utility rep contact data

Utility rate schedules CSU ETL

Original project specifications

TAB Report available?

Pump curves

Fan curves

Operation and Maintenance Manuals access to review?

Original submittals

Installation manuals

Equipment manufacturer’s literature

System or Equipment warranties none / verify replacement equipment

Control Dwgs / BAS

Points list though online access

Sequences Of Operation though online access

Hard copy of the program

Lighting control dwgs & submittals

Time of day schedules though online access

Setpoint schedules by zone though online access

Maintenance logs Work Orders?

Current service contracts

Current O&M practices

Building Operation Plan

Previous Energy Audit report not applicable?

Previous commissioning report n/a not applicable

Office equipment info

List of items facility staff considers to bemost significant problems

available through staff interviews

Other: VPN access from Worner Cx project

Notes:1) Requested lighting, wall sections, elevations (bldg envelope), roof plan, RCP, etc.2)

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BLDG DOCUMENTATION CHECKLIST

BuildingEnergySystemsEngineering&Commissioning

www.besecx.com | [email protected]

Project: ASHRAE Level I & II analysis

Date: 30 August 2011

Building: Barnes Science Center, Colorado College

Location: 1040 North Nevada Avenue, Colorado Springs, CO 80903

Contact: Emily Wright, Colorado College Sustainability Coordinator

Building DocumentationEquipment or System

Energy Mech Lighting Envlpe Special other

Record Drawings (as-builts) includingrenovations, alterations, etc.

Utility bills (past 3 years minimum)

Utility provider contact data

Utility rate schedules

All Operation and Maintenance Manuals

TAB Report

Fan & Pump curves

Original submittals

Installation manuals

Original project specifications

Equipment manufacturer’s literature

Control dwgs / sequences of operation

Current service contracts

Time of day schedules

Maintenance logs

Current O&M practices

List of items facility staff considers to bemost significant problems

Building Operation Plan

Previous Energy Audit report

Previous commissioning report

Kitchen Appliance info

Office equipment info

Other: VPN & BAS access

Other:

Other:

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Armstrong Hall, Colorado College APPENDIX H

H-1 of 2

HVAC Equipment and Components Service Life EstimatesThe following Table from 2008 ASHRAE Handbook HVAC Applications offers median service lives forvarious HVAC equipment and components:

From Commercial Energy Auditing Reference Handbook, 2008, Steve Doty, P.E., CEM:

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Armstrong Hall, Colorado College APPENDIX H

H-2 of 2

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Barnes Science Center APPENDIX I

Barnes Science Center I-1 of 2

Infrared Thermography Survey

The intent of this infrared thermography survey was to identify excess energy loss through the building openings. The

main objectives were to identify missing thermal insulation, thermal bridges, and air leakage. Also, since water is an

excellent conductor of heat, latent moisture behind a building element may be detected behind cool surfaces appearing

colder or detected behind warm surfaces as warmer.

For this project, the IR camera was utilized as a tool to capture the infrared light spectrum of heat energy flow in or out

of the building envelope. Typically, a bright white color represents the higher temperature, and the darker purplish

colors indicate colder surfaces or moisture. In some cases, this may reverse later in the day or evening, due to higher

thermal capacitance of wet objects as the building cools in the evening, as the moisture in materials retains heat. This

evaluation is based on quantitative measurements, with the emissivity set to most common existing materials (typically

brick veneer). For further discussion, please refer to the summary of methodology in the main body of the report.

ASNT-ASTM IR BUILDING SPECIFIC DATA

DATE 4 November 2011

O.A.T Range: 31F to 34F

I.A.T Range: 69.0F to 72.0F (source: BAS)

T F Range: 38F to 43F

Outside – Rh | Inside Rh 43% | 40.2%

WIND SPEED 3.8 mph to 4.2 mph

BLDG VINTAGE | AREA 23 Yrs | 69,000 gross ft2

FLOORS Basement, 1st through 3

rd

WEATHER CONDITIONS Clear | Slight Breeze

PRIOR WEATHER <2” snow in previous 48 hours

Photo 1: South Façade of Barnes Science Center

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Barnes Science Center APPENDIX I

Barnes Science Center I-2 of 2

Location: West Entrance

Photo 2: White-yellow heat signature denotes higher surface temperature readings

Location: West Entrance Ramp

Photo 3: Note bright white high temperature anomalies at basement level; recommend further investigation

Location: South Lobby

Photo 4: Cabinet unit heater in west lobby; spot temperature at cabinet register measured at expected 141°F

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Barnes Science Center APPENDIX J

Page J-0

ECM and CIP MANUFACTURER CATALOG DATA

Following sheets include data from manufacturers to consider for increasing energy efficiency.

Figure 1: the Phoenix Valve for fume hood applications

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Barnes Science Center APPENDIX J

Page J-1

Percival Scientific, Inc. Biological Incubators and Environmental Growth Chambers http://www.percival-scientific.com/

http://www.percival-scientific.com/

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This Quotation Subject To Your Written Acceptance Within Thirty Days

1. Orders based on this quotation are subject to Air Purification Co.’s terms and conditions of sale and are subject to approval and acceptance by the Air

Purification Company. No Tax is included in the above quoted material. 2. These prices apply only to the specific materials and electrical characteristics listed in the above quotation. 3. All orders with the Air Purification Company are contingent upon strikes, accidents, government demands, inability to obtain materials, or other delays beyond

the companies control. 4. Unless noted above, only standard one-year manufacturer’s warranty is included. 5. All Prices are F.O.B. factory, full freight allowed, unless otherwise stated above.

QUOTATION

Air Purification Company 1861 W. 64th Lane • Denver, CO 80221-2347

(303) 428-2800 • (303) 428-2700 • CO/WY (800) 668-4966

Project: Colorado College -Barnes Bldg Date: 1/17/2011

Phoenix Controls Budget Location: Colorado Springs, CO

To: Colorado College Engineer: N/A

Addenda: N/A

Listed below are general guidelines for budgeting only. The complete work scope should be thoroughly developed on a full set of

bid documents by a professional engineer. The below information was taken from as-built drawings. They have NOT been field verified. The below budget is for parts and startup of the phoenix control system. There’s no other labor for removing existing equipment

and there’s no labor for installing new equipment. There are several contractors and subcontractors that may have to be involved to accomplish the installation.

You may have a General Contractor, Mechanical Contractor, Electrical Contractor, Temperature Control Contractor, or other contractors involved to perform the installations.

Air Purification Company isn’t an Engineer or Contractor.

Base Budget: 32 Phoenix – Low pressure VAV hood exhaust valves w/phenolic coating and high-speed actuators

26 Phoenix – Low pressure VAV general exhaust valves w/high-speed actuators 24 Phoenix – Low pressure VAV supply valves w/high-speed actuators 1 Phoenix – Macroserver point server for BacNet integration

5 Phoenix – 4 point routers 17 Phoenix – Room temperature sensors w/LCD display, slider setpoint and occupancy button

17 Phoenix – Duct temperature sensors 32 Phoenix – Fume hood monitors

32 Phoenix – Vertical sash sensors 24 RIB – Transformers 24 American Coil – Hot water coils

Start-up Total: $311,000

Alternate Budget 32 Zone Presence Sensors Total: $30,464

*All notes and exclusions apply to the base budget and all alternates *Excludes installation, wiring, valve transitions and transitions between valve and coil, control valves for

hot water coils, access doors for coils, hot water piping and fittings, sound attenuators, quick ship fees, *Please note, there are no plans and specifications for this project. The budget was based on discussions with

Colorado College personnel and copies of as-built drawings. The above quotation for the base budget and all of the following alternate pricing is based on past Phoenix Controls projects and standard Phoenix Controls

equipment. Pricing is subject to change as the specification is written and the plans are created. Room Breakout (FOR ACCOUNTING PURPOSES ONLY, the first room(s) will cost way more because of the integration

into the BAS AND we would have to purchase a macroserver, transformer(s), and router(s) even if only one room is done. )

105, 149, 313, 314, 326, 408, 440, 439, 438, 435, 418? $11,378 each room (X 11) 421 and 425 $22,756 each room (X 2)

315, 324 and 520 $15,171 each room (X 3) 325 $94,817

By: Tony Anderson Air Purification Company

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GOLD SERIES GP1 DUCT AND PLENUM SENSORS

, Inc. 1663 Hwy. 701 S., Loris SC 29569 Toll Free: 800.2 (232.8766) Fax: 843.756.1838 Internet: .com12

TM_G

P1

_R1

H

ing devices will indicate 0 fpm (0 m/s) when thereis no airflow across the sensors. Adding a filter ormoisture eliminator upstream of the airflow meas-uring device may dampen the wind effect on someinstallations.

2. Locate the application diagram in Figure 9 that bestfits your application. Verify that minimum placementdistances can be achieved to ensure proper perform-ance. Minimum distance requirements may necessi-tate relocating dampers or adding an extension�sleeve�. A standoff mounting option is available forapplications where ductwork is unavailable. Followthe placement procedure described in LOCATINGPROBES when the distance exceeds minimumrequirements.

3. The diagrams were developed to achieve an installedaccuracy of 3% of reading (�C� density probes) at lessthan or equal to the louver manufacturer�s maximumfree area velocity (i.e. the louver is applied properly).

4. Select a mounting style, insertion, internal or stand-off, that best suits the installation requirements ofthe application. Mounting styles do not need to bespecified until the product is ordered.

5. The best results can be achieved using one ofEBTRON�s sequencing control strategies which aredescribed in the APPLICATIONS section of theEBTRON�S Engineer�s Catalog for AirflowMeasurement Devices.

OUTSIDE AIR (OA) INTAKE APPLI-CATIONSEBTRON thermal dispersion devices are well suited foroutside air intakes that generally have flow rates lessthan 500 fpm (2.54 m/s). Unlike other technologies,EBTRON sensors do not require a developed velocity pro-file to accurately measure airflow rates and are not sub-ject to fouling in most outside air environments. Eachsensor is independent and can accurately average a vari-able velocity profile without the addition of straight ductor flow straighteners.

OA Intake Probe Placement Procedure

EBTRON offers free software, EBTRON Auto-SelectTool, to assist in optimizing the placement of EBTRONairflow measuring probes in ducts or plenums. Theselection tool uses a Microsoft® Excel® spreadsheetto create a schedule for printing or e-mailing toEBTRON. The latest version of the software can bedownloaded at www.ebtron.com/autoselecttool.

To manually perform the calculations for sensor loca-tion and placement manually, please use the followingprocedure:

1. Locate the airflow measuring device upstream of theoutside air damper (between the louver and thedamper). Determine minimum airflow rate, fpmmin at

the desired location that you wish to place the airflowmeasuring device as follows:

fpmmin=cfmmin/Cross Sectional Area (sq ft).

If the airflow measuring device is located within 10 ftof the intake louver or hood and the airflow rate is lessthan 200 fpm (1.02 m/s) consider relocating the air-flow measuring device, resizing the opening or addinga separate damper for the minimum outside air intake.Installations that do not meet this guideline have beensuccessfully installed and operated. However,EBTRON cannot recommend or approve installationsnot meeting this guideline. This guideline is basedupon the following laboratory and field experience:

a. Systems designed with outside air dampers sized for200 fpm (1.02 m/s) or less may not provide ade-quate control to maintain the desired minimum air-flow setpoint.

b. Transient wind gusts can result in airflow indicationsof 100 fpm (0.51 m/s) or more on outside airintakes, even when the intake damper is closed. A�low-limit� cutoff has been implemented on allGTx116 transmitters (beginning with firmware ver-sion 4.0), to force the output below a specified air-flow value to 0. �False� readings are strictly a result ofair movement induced by winds near the airflow sta-tion on outside air intakes. DO NOT ENABLE ANDADJUST THE OUTPUT SIGNAL OFFSET TO COMPEN-SATE FOR THIS EFFECT. All EBTRON airflow measur-

NOTE

Outside Air intake standoff mounting may result ingreater measurement uncertainty since the effec-tive area may be larger than the area used to deter-mine the volumetric flow rate. Therefore, the use ofthe Field Adjustable Gain and Offset feature may berequired for acceptable accuracy performance.

Figure 8. Typical OA Damper Installation

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Page K-0

Building Floor Plans from BAS

Basement Floor Plan

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Page K-1

Ground Floor Plan

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Second Floor Plan

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Third Floor Plan

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Fourth Floor Plan

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Fifth Floor Plan