LED Case Lighting With and Without Motion Sensors

1. LED Case Lighting With and Without Motion Sensors • Michele Friedrich – Sr. Engineer • PECI • 1/5/2010

2. Acknowledgements • We would like to thank the following utilities for support • BPA • PSE • AVISTA

3. Purpose • Approval to modify LED case lighting deemed measures and add LED case light motion sensor measures.

4. Agenda • Background • PECI experience • Market • Measures to approve • Description of Measure • Baseline • Measure • Energy Savings • Cost • Measure Life • Technical and Program Specifications • Conclusions

5. Background • PECI previous experience • RTF approved LED case lighting measures- 337,000 kWh saved in 2009 for BPA • Difference between current and proposed measures: • Current measures 18 hr or 24 hr/ day case lighting and LT or MT. New measures weight the savings using rebate data. • Current units are “per linear foot of case”. New units are “per linear foot of LED”. • Current measure has one LED light bar wattage. New measures have two bins for side bars and mullion bars. • New measures for motion sensors.

6. Background • PECI previous experience • Measure restricted to Reach-in cases • Obtained weighting from PECI rebate applications • LED demand – Side bars use ½ of Mullion bars’ watts • LT and MT rebate split is not changing over time • 18 hr vs. 24 hr case light operation split is constant

7. Background • PECI previous experience • LED case lights installed in 2009 from PECI rebates

8. Background • Market Size

9. Measures • Description of Measure • Refrigerated, Reach-in, Display Case Lighting • Reduce lamp electrical demand: Change Fluorescent to LED • Reduce Hours: Incorporate Motion Sensor

10. Measures for Approval

11. Current Measures- lights on 24 hr/day Current Measures -lights on 18 hr/day 11

12. Measures • Description of Baseline Across all baselines: • Reach-in refrigerated display case. Different baselines for implementation • Lamp (T12, T8, LED) • Retrofit or New

13. Measures • Description of Measure Different measures for implementation • Change Fluorescent fixture to LED • LED wattage – Side bars less than Mullion Bars. Addressed with bins (W / ft of LED) • Add Motion Sensor to LED • LED wattage – Side bars less than Mullion Bars. Addressed with bins (W / ft of LED)

14. Energy Savings • Difference between annual Base and Proposed Consumption • Direct – Light Fixture Energy • Refrigeration Energy • Portion of Direct consumption rejects heat inside case (refrig load)

15. Energy Savings • Refrigeration system uses energy to remove heat • ASH Energy • We found no literature on effectiveness of Anti-Sweat Heaters (ASH) from the reduction of case lighting energy. • PNNL demonstrations found no frost or condensation on doors after LED with motion sensors were in operation for over 3 months.

16. Energy Savings • Assumed Values • Fluorescent Wattages (W / linear foot of lamp) • T12: 14.6 - GRAINGER (73 W, 5 ft) (PG&E WP = 75) • T8: 11.6 - GRAINGER (58 W, 5 ft) (PG&E WP = 58) • Drivers / Ballast % additional Wattage (DF) • Fluorescent Ballast 5% of lamp - GRAINGER • LED driver 5% of lamp - LED POWER LED Wattages (W / linear foot of lamp) • Side (less than 4): 3.5 – PECI rebates • Mullion (between 4 and 7.5): 7.0 – PECI rebates

17. Energy savings

18. Energy Savings • Assumed Values • Refrigeration (All PNW Climate Zones) • Annual Avg. EER (Btu/hr / W) • Medium Temp: 10.9 - DOE2.2R grocery model, PNW • Low Temp: 5.0 - DOE2.2R grocery model, PNW • % Heat transferred to Refrigeration System • Lamps: 100% - inside case (neglect conduction) • Drivers/Ballast 50% - observations (some in, some out)

19. Energy Savings • Assumed Values • LED dimming when un-occupied: 20% - PNNL, LARGE CHAIN, SMUD • Motion Sensor % of lighting operational hours at reduced wattage • 18 HR /day case lighting: 29% - PNNL (EUGENE) • 24 HR /day case lighting: 39% - PNNL (EUGENE, POULSBO)

20. Energy Savings • Graph of PNNL daily motion sensor activated light data

21. Energy Savings Data from SMUD and Large Chain case lighting motion sensor demonstrations SMUD: 51% Hrs at 20% W Large Chain

22. Measure Costs • Cost Inputs: • Fluorescent (new case): $60.00 / door - Hussmann • LED lighting equipment: • Side Bar: $111 / 5 ft bar - PNNL • Center Bar: $185 / 5 ft bar - PNNL • Labor: $60 / door - PNNL • Motion Sensor • Equipment: $65 / 25 ft of case - PNNL, LED Power • Labor: $65 / 25 ft of case - PNNL, LED Power

23. Measure Life Assumptions • LED Lights • 52,560 hours PG&E Study • 70,000 hours LED POWER • No Motion Sensor • 24 hr / day: 6 years (52,560 / 8760) • 18 hr / day: 8 years (52,560 / 6570) With Motion Sensor • 24 hr / day: 9 years [52,560/ (8760*(0.61 + 0.39*0.2))] • 18 hr / day: 10 years [52,560/ (6570*(0.71 + 0.29*0.2))] • Motion Sensor • 8 years PG&E work paper for space lighting motion sensors

24. Program Specifications For the Measure • Terms and Conditions • Restricted to refrigerated reach-in display cases only. • Must replace existing reach-in refrigerated display case fluorescent fixture with a LED fixture. • Fluorescent magnetic ballasts can not be used to power the LED. • LED lighting system must be a permanently installed fixture. • LED lights must have minimum CRI of 75 and provide a minimum of 70% of initial lumens at 50,000 hrs. • Manufacturer’s warranty must be a minimum of three years. • The motion sensor must reduce lighting load to 20% or less when unoccupied. • Case lights on existing timer must continue to turn lights off at night after installing motion sensor. • Incentives paid based on linear feet of LED. Rebate and energy savings values vary based on lamp size (T8 or T12) and LED wattage (low or high).

25. Conclusion Approval to modify LED case lighting deemed measures and add LED case light motion sensor measures.