1 rmashrae rating systems 0416 10
TRANSCRIPT
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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
Jesse Stanley