1 rmashrae rating systems 0416 10

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Linda Morrison

Jesse StanleyApril 16th 2010


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Energy efficiency

Renewable energy

Net zero buildings

Envelope

HVAC systems

Water efficiency and metering

Rating system, codes, best practice


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LEED-NC Version 3 [RATING SYSTEM]

Labs 21 [RATING SYSTEM SUPPLEMENT]

CO-CHPS [RATING SYSTEM]

ASHRAE 90.1-2007 [STANDARD]

ASHRAE 189.1-2009 [STANDARD]

PNNL 50% Energy Savings Design TechnologyPackage Medium Office[GUIDELINE]

Architecture 2030 [GUIDELINE]

Living Building Challenge [RATING SYSTEM]


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ASHRAE 189.1


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http://www.architecture2030.org/2030_challenge/targets.html
http://www.architecture2030.org/2030_challenge/targets.html


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Energy Star / Energy Use Index (kBTU/sf/yr)

Compares building performance to average building

Average building determined by Commercial Building Energy

Consumption Survey (CBECS) 2003Energy Star Target Finder score of 50 is average

Target Finder score of 75+ is qualified for Energy Star

Performance Rating Method 90.1

Compares design to baselineAll areas modeled as heated and cooled

Natural ventilation is an exceptional calculation

Limits on unmet hours


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Reduction fromASHRAE 90.1-2007

Energy Star

LEED -NCv3 Mandatory10%

Points up to 48%

NA

CO-CHPS Mandatory 25%Points up to 60%

Minimum 75Energy StarTarget Finder

ASHRAE189.1-2009

Comply with 189 NA


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Living Building Challenge:100% of a projects energy needs must be supplied by on-siterenewable energy on a net annual basis


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Renewables Green Power

LEED -NCv3 Not mandatory1 point for 1% energy cost

7 points for 13% energy cost

1 point for 35% of electrical

use for 2 years

CO-CHPS Mandatory Flex EnergySolar Ready7 points for 50+% annual site energywith monitoring system

after 40% reduction from 90.1-2007:Grid Neutral (electric, site)

Zero Net Energy (site)ASHRAE

189-2009Mandatory renewable ready for

minimum of 3.7 W/sf x roof area

Prescriptive:

Requires 6.0 kBtu/sf of conditioned space

Prescriptive Exception:

less than 4.0 kW/m2 dailyaverage incident radiation

AND

purchase 7 kWh/sf of Green

Power for 10 yrs


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Design to cost-effectively adapt:

PV 100% annual electric usage

Ground Source Heat Pumps 100% of heat / cool

Thermal Energy Storage 8 hours of heat / coolElectric Vehicles 50% of parking spaces

Biomass 80% of heating

Solar HW Heating 50% of pool

MER for future off-site district energy


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Flex Energy for Buildings

High-level overview of key systems and technologies

Checklist of design suggestions

Online calculator to estimate system capacities and sizerequirements

Simple electronic workbook to document design decisions


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Climate Zone ASHRAE 90.1 07 ASHRAE 189.1 09* PNNL 50% 90.1 04

Steel Framed Steel Framed Steel Framed

C. Z. 4 R-15.6 R-18.2 R-15.6

C. Z. 5 R-15.6 R-18.2 R-23.8

C. Z. 6 R-15.6 R-18.2 R-27.0

C. Z. 7 R-15.6 R-18.2 R-27.0

*Requires air barrier


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Climate Zone ASHRAE 90.1 07 ASHRAE 189.1 09 PNNL 50% 90.1 04

Insulation above Deck Insulation above Deck Insulation above Deck

C. Z. 4 R-20 c.i. R-25 c.i. R-30 c.i.

C. Z. 5 R-20 c.i. R-25 c.i. R-30 c.i.

C. Z. 6 R-20 c.i. R-30 c.i. R-30 c.i.C. Z. 7 R-20 c.i. R-35 c.i. R-35 c.i.


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Climate Zone ASHRAE 90.1 07 ASHRAE 189.1 09 PNNL 50% 90.1 04

U Factor SHGC U Factor SHGC U Factor SHGC

C. Z. 4 0.40 0.40 0.30 0.35 0.44 0.26

C. Z. 5 0.35 0.40 0.25 0.35 0.44 0.26

C. Z. 6 0.35 0.40 0.25 0.40 0.42 0.35

C. Z. 7 0.35 0.45 0.25 0.45 0.31 0.40

Nonmetal framing


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Rating System Shading Requirements

LEED-NCv3 NA

CO-CHPS NA

ASHRAE189.1-2009

Climate Zones 1-5:Fenestration on west, south, and eastshaded by permanent projections

with Projection Factor of 0.50 ormore


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Shading Requirements

LEED-NCv3 NA

CO-CHPS Shade (15 years of growth) to at least 30% of allSW, S, and SE surfaces with 80 ft of building.

ASHRAE189.1-2009

Shade 30% of east and west above grade wallsgrade to 20 ft within 5 years of growth

10 am for east and3 pm for west on summer solstice


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Fan EnergyASHRAE 90.1-2007

Constant Volume hp


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Economizer

ASHRAE 90.1-2007Economizers required for units above 65,000 Btu/h to 135,000 Btu/h

depending on climate zoneHigh Limit Shut offs depend on climate zone and control type

ASHRAE 189.1-2009Economizers required for units above 33,000 Btu/h for most ClimateZones 3-8

Rooftop units under a certain size must have a two stage capacity foruse with the outside air economizer

Fixed leaving air temperature systems must be capable of resettingsupply temperature during economizer operation

Economizer can be eliminated if cooling efficiency is high enough


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Heat RecoveryStandard Requirements MinimumEffectiveness

90.1 2007 Systems with 5000 cfm an d 70% or more outside air 50%

189.1 2009 Depends on Climate Zone, Supply flow, and % Outside Air 60%


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Standard Fume Hoods

90.1 2007 Fume Hood exhaust over 15,000 cfm must be either :Variable Air Volume

Dedicated Outside Air System

Or Heat Recovery

Labs 21 Consider not using Fume Hoods

Develop fume hood sash management planFume hood monitoring and control

Fume hood commissioning

Fume Hoods


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Building Automation Systems

Building Automation

CO-CHPS BAS RequiredIncludes recommended Sensors, Points Matrix, Trend

Capabilities, and System Architecture

HVAC and domestic hot water

Lighting

189.1 2009 7.3.3 Energy Consumption ManagementRequires measurement and data collection for various systems given

a certain connected load is met


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Emissions

CO-CHPS Mandatory Calculate,report, and verify annual GHG emissions tothe Climate Action Registry

189.1 2009 Emissions to air accounted for in LifeCycle Assessment of

material components and energy consumption

Green House Gas Emissions


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Living Building Challenge:

Net Zero Water

LBC allows initial water purchase only

Would require on site water treatment including black water100% of storm water and building water must be handled on sitefor reuse


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Indoor Water Sewer Conveyance Process Water

Reduction Reduction Efficiency

LEED-NCv3 Mandatory 20%

Points for 30%-40%

50% Reduction

Treat 50% on-site

Schools:

20% reductionNo garbage disposals

No once-throughcooling

CO-CHPS Mandatory 20%

Points for up to 50%Includes process

35% reduction

through efficiencyor reclaimed or

recycled water

See Indoor


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Fixture LEED-NCv3CO-CHPS

ASHRAE 189.1-2009

Toilets 1.6 gpf 1.28 gpf

Urinals 1.0 gpf 0.5 gpfFaucets 0.5 gpm

0.25 g metering

0.5 gpm

0.25 g metering

Kitchen Faucets 2.2 gpm 2.2 gpm

Showerheads 2.5 gpm 2.0 gpm


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Process Water

Efficiency

ASHRAE 189.1-

2009

No once-though cooling w/potable

Cooling tower drift:0.002% counterflow

0.005% cross-flow

Cycles of concentration

Recover condensate

SteamA/C units > 65,000 kBTU/hr

Labs 21 No domestic water once-through cooling at a flow rate

greater than 2 gallons per minute

20% process water reduction


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Metering

LEED-NCv3 NA

CO-CHPS WE3.1.1 1 point:

Separately meter domestic water, exterior irrigation and equipment

exceeding 20% of total and provide maintenance plan

WE3.1.21 point:

Water Management System with pulse output water meters

Indoor water

Gyms with showers

Landscaping

Recreational fields

Swimming pool

Cooling towers


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Metering

ASHRAE

189.1-2009

Water Consumption Management for potable > 1000 gal/day and

reclaimed water > 1000 gal/day

Cooling towers > 500 gpm through tower

Evaporative coolersmakeup water > 0.6 gpm

Steam and hot water boilers > 500,000 BTU/hr

Submeters for tenants

Irrigation > 25,000 sf

Labs 21 Document annual process water use and wastewater

Meters for process water


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Living Building Challenge:

First two projects to be certified in May 2010

Colorado:

1 not confidential The Lindholm Residence, Snowmass, CO

3 confidential Carbondale, Telluride (commercial/medical), other

Elsewhere:

70 officially registered projects in N. America

4 International (France, Ireland, Australia, Colombia)

14 Canada


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Linda Morrison

[email protected]

Jesse Stanley

[email protected]

1 rmashrae rating systems 0416 10

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