Northwest Power and ConservationCouncil

Pre-Rinse Spray ValvesPre-Rinse Spray Valves

RTFRTFJanuary 2007January 2007

Northwest Power and ConservationCouncil

Northwest Power and ConservationCouncil

GenesisGenesis Draft evaluation from California program evaluation Draft evaluation from California program evaluation

finds much reduced savingsfinds much reduced savings

Experience to date contains some surprisesExperience to date contains some surprises

EPAct 2005 set standards for spray headsEPAct 2005 set standards for spray heads

– 1.6 gpm for new heads beginning Jan 20061.6 gpm for new heads beginning Jan 2006

Northwest Power and ConservationCouncil

IssuesIssues

How do the CA (& other) findings impact RTF savings?How do the CA (& other) findings impact RTF savings?

Are program changes, protocols or screening in order?Are program changes, protocols or screening in order?

What PNW analysis & evaluation is needed?What PNW analysis & evaluation is needed?

Who wants to help?Who wants to help?

Northwest Power and ConservationCouncil

Savings EstimatesSavings Estimates Council 5Council 5thth Plan Plan

– 3800 kWh per unit (head)3800 kWh per unit (head) Per Unit data from evaluations in AWWA study Per Unit data from evaluations in AWWA study

– 4400 kWh per unit in 4400 kWh per unit in food servicefood service (n=36) (n=36)– 130 kWh per unit in 130 kWh per unit in groceriesgroceries (n=7) (n=7)

Program level savings Program level savings – CUWWC Phase 2 (draft) per CUWWC Phase 2 (draft) per claimedclaimed head for mix of fuels head for mix of fuels

& facilities & net of free-riders & removals: & facilities & net of free-riders & removals: – 51 kWh plus 28 therms plus 6400 gallons water51 kWh plus 28 therms plus 6400 gallons water

Northwest Power and ConservationCouncil

Savings FactorsSavings Factors Pre- and post-install flow ratesPre- and post-install flow rates Delta T (mixed minus cold)Delta T (mixed minus cold) Hours of use pre- and post-install Hours of use pre- and post-install

– Fewest data points on this with large uncertainty bandFewest data points on this with large uncertainty band Distribution of types of facilitiesDistribution of types of facilities Distribution of water heater types & efficienciesDistribution of water heater types & efficiencies Head retention & measure lifeHead retention & measure life Baseline penetration of low-flow headsBaseline penetration of low-flow heads Impact of EPAct 2005 standard for new heads Impact of EPAct 2005 standard for new heads

Northwest Power and ConservationCouncil

What We KnowWhat We Know PNW programs at King County, PSE, & ETO PNW programs at King County, PSE, & ETO Avista is considering program & PECI Avista is considering program & PECI

considering as part of Energy Smart Grocerconsidering as part of Energy Smart Grocer Recent study by SBW for American Water WorksRecent study by SBW for American Water Works

– Collects & synthesizes evaluation work to date in CA, Collects & synthesizes evaluation work to date in CA, PNW, CanadaPNW, Canada

– Much good data on key factors that influence savingsMuch good data on key factors that influence savings– Study is attachedStudy is attached

Northwest Power and ConservationCouncil

Preliminary ThoughtsPreliminary Thoughts Original savings estimate should be reviewedOriginal savings estimate should be reviewed

– May be in the ball park for food serviceMay be in the ball park for food service– But likely too high for groceriesBut likely too high for groceries

AWWA report has much useful data that AWWA report has much useful data that could be employed to re-estimate savingscould be employed to re-estimate savings

May need PNW measured data on hours of May need PNW measured data on hours of use pre- and post-installationuse pre- and post-installation

Get more PNW data on water tempsGet more PNW data on water temps Find a contractor to do this with oversight of Find a contractor to do this with oversight of

an RTF subcommitteean RTF subcommittee

Northwest Power and ConservationCouncil

Draft RecommendationDraft Recommendation Issue RFPIssue RFP

– Review savings estimates in light of recent Review savings estimates in light of recent evaluation findingsevaluation findings

– Identify and conduct research needed to revise Identify and conduct research needed to revise estimatesestimates

– Develop program recommendations, savings Develop program recommendations, savings protocolsprotocols

– RTF subcommittee to overseeRTF subcommittee to oversee

Northwest Power and ConservationCouncil

EndEnd