same april 2016 luncheon presentation - james a. haley veteran's hospital: teco and esg's energy...

7/25/2019 SAME April 2016 Luncheon Presentation - James A. Haley Veteran's Hospital: TECO and ESG's Energy Savings Project

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2016 Energy Systems Group, LLC | www.energysystemsgroup.com

2016 Energy Systems Group, LLC | www.energysystemsgroup.com 1

TECO Peoples Gas andESG's Energy Savings

Project at James A. HaleyVeterans' Hospital

A review of the ongoing energy conservation

project being performed at the James A. Haley

Veterans' Hospital.

Daniel Townsend, PE, CEM

Energy Systems Group


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James A. Haley Veterans Hospital

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Background Information on Tampa VAMC

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Five local VA Facilities fall under the James A. HaleyVeterans Hospital

Our project focused on the Tampa VA Hospital Located west of the University of South Florida

North of Bruce B. Downs Blvd and Fowler Avenue intersection

Key Features 418 bed main hospital

118 bed nursing home

22 Special Programs: Spinal Cord Injury, Multi-Trauma, etc.

Multiple buildings with Central Thermal Plant


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2016 Energy Systems Group, LLC | www.energysystemsgroup.com2016 Energy Systems Group, LLC | www.energysystemsgroup.com

Overview of Project

Conducted through the UESC contract mechanism

Key Participants

Veterans Administration TECO Peoples Gas Utility

Energy Systems Group ESCO

Multiple Subcontractors

Utility Savings: $2.240 mil per year

Total Project Costs: $19.662 mil

Simple Payback: 8.8 years (8.7 with rebate)

Development Period: 11 months

Number of ECMs: 21 Energy Conservation Measures

Scope of audit: 20 buildings

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Contract Mechanism

Utility Energy Service Contract (UESC)

Permits utility companies to develop energy savingsprojects with federal agencies such as the VA, DoD,NASA, USDA, etc.

Projects reduce utility costs - electrical, water or gas

demand Why are the utilities interested?

Good customer relations

Regulatory requirements Capacity benefits

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Process Preliminary Feasibil ity Audit

ESG engineers and clients identify potential projects

Initial costs and economic benefits of the project areestimated

ECM list is refined using economic criteria Usually Life Cycle Cost Analysis / Simple Payback

Scope of final study developed in a cooperative effortwith the agency

Cost to develop Investment Grade Audit (IGA)

proposed Covers design expenses to finalize scope, savings and costs

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Process Investment Grade Audit

The Investment Grade Audit (IGA) is the final proposalshowing all key project information

Proposed Scope of Work Equipment cut sheets, drawings, technical information

Financial information

Total Project Costs

Total Annual Savings

Operation and Maintenance Savings if applicable

Energy savings calculations

Measurement & Verification (a.k.a., Performance Assurance)Plan

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Process IGA Savings Calculations

Savings Calculations Excel based calculation sheet, or

Industry vetted software used to calculate savings

Excel based calculations show the following: Known inputs

Assumptions Formula used to derive savings

Calculations (often in a table format)

Industry vetted software usually includes the following: Software name and version

Input values

Output values

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Process IGA Savings Calculations Example

Utility Savings: O&M

ECM Description Dependencies

Water

Savings

(kgal)

Sewage

Savings

(kgal)

Project

Savings

MMBTU

Project

Savings kW

Project

Savings

kWh

Project

Utility Cost

Savings

Project

O&M Cost

Savings

1 Indoor and Outdoor Lighting

2.1 Water Upgrade

3.1 UV Lights3.1.1 UV Lights On-going Maintenance

4.2 Steam Trap

5.1 Controls Upgrade

5.2 Kitchen Exhaust Hood Ventilation Control

6.1 Chiller Plant Optimization

6.2.1 Secondary Chilled Water Optimization(chillers)

6.2.2 Secondary Chilled Water Optimization(motors)

6.2.2.1 Remove Valves in Secondary Loop

6.2.3 Building 38 chilled water loop conversion

6.3 DX Unit Replacement at MRI

6.4 Building 30 AHU Ductwork Mod

6.5 Building 38 AHU Issues / Airflow Controls

6.6 Building 1 AHU-4 Removal

6.7 Replace Coils in AHU 12 and AHU 20

6.8 Chiller Insulation

6.9 Sterilization Condensate Recovery

6.10 Convert AHU-7 & 8 to VAV system

AHU 11

AHU 14

AHU 22 and 23

Bldg 41 conversion from DX units to ChilledWater units

7.1 Transformer Replacement

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Process IGA Savings Calculations ExampleTitle Summary of Project

Project 5.2 Kitchen Exhaust Hood Ventilation Control

Site Tampa, FL

Description Control Kitchen Exhaust Hood

Givens Existing Source

Electric Cost: = 0.0809 ($/kWh)

Assumptions Motor Load Factor see table

Current Hours Per Day = 24hrs per day

Proposed full speed ops = 6hrs per day

Proposed partial speed ops. 7hrs per day

Days per Year = 365

Assumed max CFM = 11100CFM

Installed hp = 20

Initial motor efficiency = 85%

Existing motor efficiency loss of 10% of original efficiency

Motor kWh improvement lower threshold 0.05

Formula Motor Power (kW) = (Motor HP x 0.746 (kW/hp) x Load Factor) / (Efficiency)

Speed Corr. Factor = ((New RPM)/(Existing RPM)) 3

Existing Energy Use (kWh) = (kW) x (Hours of Use)

New Energy Use (kWh) = (kW) x (Hours of Use) x (Speed Correction Factor)

Total Savings (kWh) = (Existing Energy Use) - (New Energy Use)

BTU/hr to change air temp = CFM x 1.08 x (T2-T1)

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Assumptions Motor Load Factor see table

Current Hours Per Day 24hrs per day

Proposed full speed ops 6hrs per day

Proposed parital speed ops. 7hrs per day

Days per Year 365

Assumed max CFM 11100 CFM

Installed hp 20

Initial motor efficiency 85%Existing motor efficiency loss of 10%of original efficiency

Motor kWh improvement lower threshold 0.05


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Formula Motor Power (kW) =(Motor HP x 0.746 (kW/hp) x LoadFactor) / (Efficiency)

Speed Corr. Factor =((New RPM)/(ExistingRPM)) ^ 3

Existing EnergyUse (kWh)

=(kW) x (Hours ofUse)

New Energy Use(kWh)

=(kW) x (Hours of Use) x (SpeedCorrection Factor)

Total Savings(kWh)

=(Existing Energy Use) - (New EnergyUse)

BTU/hr to changeair temp

= CFM x 1.08 x (T2-T1)


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Identification of Technical / Financial Risk

Mathematical Model built in Excel

Known and Unknown inputs identified

Simulation used to identify potential outcomes

Unknowns replaced with probability distributions

Outputs identified

Thousands of iterations run using Monte Carlo Simulation Output of each iteration recorded and used to make

Probability Distribution Function (PDF)

Output PDF identifies probability of achieving predicted

savings Tornado Chart used to identify need for further analysis

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Simulation Process

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Replacement of uncertain model

inputs with representative PDF

Outcome data gathered from

simulation output for further analysis


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Simulation Process Input Example

55%

60%

65%

70%

75%

80%

85%

90%

95%

100%

105%

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Simulation Process Output Example

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Process IGA Cost Development

Development of Scope of Work (SOW) with the clientsSubject Matter Experts

Facility engineers Maintenance personnel

Other key personnel

Use of SOW to obtain multiple bids from qualifiedsubcontractors

Selection of bids against multi-criteria evaluation Use of modified Analytic Hierarchy Process (AHP)

Intent is to get absolute best value for our clients

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Types of ECMs Identif ied at James A. Haley

Lighting upgrades LED, T-8 and controls

Water savings measures

Extensive building controls upgrades

Electrical distribution upgrades

Extensive HVAC (Heating, Ventilation, and AirConditioning) work Chiller plant optimization

Chilled water distribution improvements

Steam condensate recovery Redesign of air distribution systems

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Atypical ECMs

Sterilizer Condensate Recovery

Chilled Water Distribution Ultraviolet Lights in Air Handling Units

Increased use of pedal valves

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Summary

All projects are in effect self-supporting due to energysavings and payback requirements

$19.662 mil with 8.8 year payback

Substantial improvements to facilitys infrastructure andsystem reliability

Substantial improvement to the comfort of those wholive, work and visit the hospital

Large reduction in annual operating costs $2.240 mil per year reduction

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2016 Energy Systems Group, LLC | www.energysystemsgroup.com2016 Energy Systems Group, LLC | www.energysystemsgroup.com 21

Thank Youwww.energysystemsgroup.com

same april 2016 luncheon presentation - james a. haley veteran's hospital: teco and esg's energy...

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