Out-Of-Compliance Grocery UES Measure Recommendations

1. Out-Of-Compliance Grocery UES Measure Recommendations Regional Technical Forum June 17, 2014

2. 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

3. 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

4. Background – Remaining Potential Note: Remaining potential based on PNW territory only.

5. What hasn’t been done • Estimating measure interactions very limited • Only looked at HVAC interaction within measure • Possible to have interactions among measures

6. 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?

7. Display Case LEDs (Open Cases)

8. 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

9. Recommendation Memo Items

10. 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

11. 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

12. 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

13. 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.”

14. Floating Head Pressure Control on Single Compressors

15. Measure Overview • What does it do? • Installs Floating Head Pressure Controls on single compressor systems • Allows head pressure of system to follow ambient dry bulb temperature instead of preset on/off operation based on cut-in/cut-out pressures • Savings occur from: • Load reduction of refrigeration system

16. Recommendation Memo Items

17. 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

18. Updated Compressor Weights

19. 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

20. 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

21. Proposed Decision “I _______________ move that the RTF: • Restrict measure to grocery sector only • Direct staff to look at potential for FHPC outside of the grocery sector and bring back to RTF at next meeting • 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.”

22. Door gaskets on walk-ins and reach-ins

23. 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

24. Recommendation Memo Items

25. 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

26. 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%.

27. 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

28. 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%

29. 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

30. 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

31. Proposed Decision “I _______________ move that the RTF: • 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’ measure as a “Small Saver” UES; • Set the measure status to ‘Active;’ and • Set the sunset date to June, 2019.”

32. Door Auto Closer on walk-ins and reach-ins

33. 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

34. Recommendation Memo Items

35. Staff Highlighted Areas • Unintentional door open time • Based on professional judgment only

36. 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

37. 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

38. 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

39. 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.”

40. Strip Curtains on Walk-ins

41. 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

42. Recommendation Memo Items

43. 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

44. 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

45. 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

46. Strip Curtain Takeback

47. Strip Curtain Takeback December 2007 BPA M&V presentation

48. Strip Curtain Takeback • Effect of adjusted post-install times on savings • Range of 9% -> 20% savings difference

49. 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

50. 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