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Out-Of-Compliance Grocery UES Measure Recommendations. Regional Technical Forum June 17, 2014. Presentation Outline. Background Measure Overview Staff Highlighted Areas UES Workbook Measure Descriptions Measure Analysis and Input Details Savings, Cost, and Cost Effectiveness
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Out-Of-Compliance Grocery UES Measure Recommendations Regional Technical Forum June 17, 2014
Presentation Outline • Background • Measure Overview • Staff Highlighted Areas • UES Workbook • Measure Descriptions • Measure Analysis and Input Details • Savings, Cost, and Cost Effectiveness • RTF Staff Recommendation • Proposed Decision
Background • Multiple Grocery measures found Out-of-Compliance • Subsequent analysis determined remaining potential small • Extended sunset date at November 2013 meeting • Staff to develop plan to bring back into compliance • Grocery measures in question: • ECMs for Walk-ins – Done • Walk-in Evaporator Fan ECMotor Controllers – Done • Compressor Head Fan Motor Retrofit to ECM – Done • Display Case LEDs (Open Cases) • Floating Head Pressure Controls for Single Compressor Systems • Door Gasket Replacement • Auto Door Closers • Strip Curtains
Background – Remaining Potential Note: Remaining potential based on PNW territory only.
What hasn’t been done • Estimating measure interactions very limited • Only looked at HVAC interaction within measure • Possible to have interactions among measures
What direction to take? • Can ask RTF staff to: • Bring measure back including interactions • Will need to define a “full package” for grocery refrigeration cases • Estimate interactions among measures • RTF professional judgment • Ignore interactions • Staff estimate is that interactions are likely small and do not warrant further research. • Furthermore, estimation methods of measures are varied and it may not be practical to reliably determine interactions • Should staff resources be spent on estimating measure interactions for measures the RTF has categorized as Small Savers?
Measure Overview • What does it do? • Either: • Replaces existing fluorescent lamps on Open Display Cases with LEDs • Installs LEDs in new cases instead of fluorescent lamps • De-lamps fluorescent lamps in existing cases • Savings occur from: • Wattage reduction of lamps • Runtime and load reduction of refrigeration system • Load reduction on store HVAC heating system • Assuming grocery stores heat most of the year
Staff Highlighted Areas • Measure specs • Changed measure spec to align with BPA implementation which states that efficacy of LED lights must be within 10 lumens/watt of Design Lights Consortium specifications. • Removed requirement for permanently installed fixture (drop-in replacement lamps now allowed) • LED life • Manufacturer rating of 50,000 hours used • Results in a 7 year EUL based on HOU
Savings, Cost, & Cost Effectiveness • Go to the following sections in the Presentation tab in the proposed measure workbook: • Measure savings • Measure costs • Measure TRC B/C ratios
RTF Staff Recommendation • Use manufacturers claim of LED life in estimating EUL • Restrict RTF-approved period to 2 years to look at persistence of drop-in LED lamps • Approve the ‘Display Case LEDs (Open Cases)’ UES measure as a “Small Saver” • Set the measure status to “Active” • Set the sunset date to June, 2016 to account for rapidly evolving LED technology
Proposed Decision “I _______________ move that the RTF: • Approve the ‘Display Case LEDs (Open Cases)’ measure as a “Small Saver” UES; • Set the measure status to ‘Active;’ and • Set the sunset date to June, 2016.”
Measure Overview • What does it do? • Installs Floating Head Pressure Controls on single compressor systems • Allows head pressure of system to follow ambient wet bulb temperature instead of preset on/off operation based on cut-in/cut-out pressures • Savings occur from: • Load reduction of refrigeration system
Staff Highlighted Areas • Measure spec • Clarified that measure is applicable to grocery sector only • Remaining potential that qualifies this as a small saver is based on this assumption
Savings, Cost, & Cost Effectiveness • Go to the following sections in the Presentation tab in the proposed measure workbook: • Measure savings • Measure costs • Measure TRC B/C ratios
RTF Staff Recommendation • Restrict measure to grocery sector only • Approve the ‘Floating Head Pressure Control on Single Compressors’ UES measure as a “Small Saver” • Set the measure status to “Active” • Set the sunset date to June, 2019
Proposed Decision “I _______________ move that the RTF: • Approve the ‘Floating Head Pressure Control on Single Compressors’ measure as a “Small Saver” UES; • Set the measure status to ‘Active;’ and • Set the sunset date to June, 2019.”
Measure Overview • What does it do? • Replaces existing worn gasket with new gasket • Savings occur from: • Runtime reduction on refrigeration system • Load reduction on store HVAC heating system • Assuming grocery stores heat most of the year
Staff Highlighted Areas • Changed measure spec to include “hand test” to determine eligibility • Door open times • Two sources exist for door open times, with varying results • Gasket baseline • Many stores found to maintain gaskets outside program; professional judgment needed
Door Open Times • Two studies provide different results on door open times • Recommend using combination of both results • Weighted by ‘n’ in each sample *Note: Using only PECI data for Low-temp walk-in since none metered in ADM study. Mean and median of those 4 sites is around 4.5%.
Gasket Baseline • ADM study indicates high replacement rate even without maintenance contracts (12 out of 71 had contracts) • Professional judgment needed on interpreting results 79% 68% 53% 100%-53% = 47% de-rating factor Source: Commercial Facilities Contract Group 2006-2008 Direct Impact Evaluation Study ID: PUC0016.03 Volume 3 of 3 HIM Appendices
Gasket Baseline • Recommend applying Maintenance Adjustment Rate to savings estimate based on ADM evaluation findings • Accounts for gasket replacement being done in grocery stores without maintenance contracts • Recommend restricting measure to stores without maintenance contracts in place • If program did not check for maintenance contracts, Maintenance Adjustment Rate would change from 47% -> 39%
Savings, Cost, & Cost Effectiveness • Go to the following sections in the Presentation tab in the proposed measure workbook: • Measure savings • Measure costs • Measure TRC B/C ratios
RTF Staff Recommendation • Use the combined study samples to estimate door open times • Restrict the measure to stores without maintenance contracts • Incorporate the Maintenance Adjustment Rate • Approve the ‘Door Gaskets’ UES measure as a “Small Saver” • Set the measure status to “Active” • Set the sunset date to June, 2019
Proposed Decision “I _______________ move that the RTF: • Approve the ‘Door Gaskets’ measure as a “Small Saver” UES; • Set the measure status to ‘Active;’ and • Set the sunset date to June, 2019.”
Measure Overview • What does it do? • Installs a new Door Auto Closer on existing walk-in or reach-in case that either has one that is broken or does not have one at all • Savings occur from: • Runtime reduction on refrigeration system • Load reduction on store HVAC heating system • Assuming grocery stores heat most of the year
Staff Highlighted Areas • Unintentional door open time • Based on professional judgment only
Unintentional Door Open Time • Value is meant to represent time door is left unintentionally open • Not the same as door open/close times for accessing product • Use gasket study open times as a reality test
Savings, Cost, & Cost Effectiveness • Go to the following sections in the Presentation tab in the proposed measure workbook: • Measure savings • Measure costs • Measure TRC B/C ratios
RTF Staff Recommendation • Maintain door open time estimate of 25% • Approve the ‘Door Auto Closer’ UES measure as a “Small Saver” • Set the measure status to “Active” • Set the sunset date to June, 2019
Proposed Decision “I _______________ move that the RTF: • Approve the ‘Door Auto Closer’ measure as a “Small Saver” UES; • Set the measure status to ‘Active;’ and • Set the sunset date to June, 2019.”
Measure Overview • What does it do? • Installs a strip curtain on a walk-in freezer or cooler where none existed before (so my picture was a little misleading) • Savings occur from: • Load reduction of refrigeration system • Load reduction on store HVAC heating system • Assuming grocery stores heat most of the year
Staff Highlighted Areas • Temperature of Surroundings Parameter • Some walk-ins open to unconditioned spaces • No adjustment for PNW compared to CA • Strip Curtain Takeback • Do door open times increase after strip curtains are installed • Strip Curtain baseline • Many stores found to maintain strip curtains outside program; professional judgment needed
Temperature of Surroundings • Used to determine infiltration air temp • A small swing of infiltration temp produces a large swing in savings • Savings increase as infiltration temp increases • ADM study results use storage area temps in respective establishments • These include some indoor and unconditioned zones • No easy way to access ADM data on climate zone weightings to discern % or outdoor/indoor walk-ins used • Recommend limiting measure eligibility to walk-ins that open to conditioned spaces only • Likely that storage areas/grocery stores same in PNW and CA
Strip Curtain Takeback • Door open time is a primary determinant • No statistical data on door open times • Definitely none for strip curtain post-install • Some evidence does suggest significant takeback can occur
Strip Curtain Takeback December 2007 BPA M&V presentation
Strip Curtain Takeback • Effect of adjusted post-install times on savings • Range of 9% -> 20% savings difference
Strip Curtain Takeback • Recommend incorporating some level of takeback in estimate • BPA single case study shows ~160% in post case • No significant data on this estimate • Up to RTF professional judgment
Strip Curtain Baseline • Similar to gaskets: Many stores already doing maintenance regardless of contracts • Professional judgment needed on interpreting results 65% 76% 49% 100%-49% = 51% de-rating factor Source: Commercial Facilities Contract Group 2006-2008 Direct Impact Evaluation Study ID: PUC0016.03 Volume 3 of 3 HIM Appendices