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LED Case Lighting in Vertical and Semi-Vertical Open Refrigerated Cases

LED Case Lighting in Vertical and Semi-Vertical Open Refrigerated Cases. Eric Mullendore – Energy Analyst PECI 6/29/2010. Acknowledgements. We would like to thank the following for their support: Avista Utilities Bonneville Power Administration Puget Sound Energy. Purpose.

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LED Case Lighting in Vertical and Semi-Vertical Open Refrigerated Cases

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  1. LED Case Lighting in Vertical and Semi-Vertical Open Refrigerated Cases Eric Mullendore – Energy Analyst PECI 6/29/2010

  2. Acknowledgements • We would like to thank the following for their support: • Avista Utilities • Bonneville Power Administration • Puget Sound Energy

  3. Purpose Approval for new deemed measures for LED light bars in vertical and semi-vertical, open refrigerated display cases

  4. Agenda Background Measure Description Energy Savings Cost Measure Life Program Specifications Conclusions

  5. Background • Existing RTF approved measures for LED Lighting in Reach-in Refrigerated Display Cases • Units are ‘Foot of LED’ • High and Low Power LED Bins with the Same Baseline • Savings are weighted to represent mix of case • temperatures and light operating hours • Includes option to add motion sensors

  6. Proposed Measures • Units are ‘Foot of Fixture’ • High and Low Power LED Bins with Different Baselines • Savings are weighted to represent mix of light operating hours and lamp placement • Includes option to reduce lighting levels to achieve greater savings • No option to add motion sensor control at this time

  7. Proposed Measures

  8. Baseline • All baselines assume lighting in vertical or semi-vertical, open medium temperature refrigerated cases. (Measure can be applied to low temperature case) • Baseline variations: • Lamp (T10/T12, T8) • Lamp Count (1 or 2) • Lamp Placement (Inside or Outside Refrigerated Space) • Retrofit or New Final Rule for Commercial Refrigeration Equipment; Appendix B. USDOE. January 2009.

  9. Measures • Change Fluorescent Fixtures to LED • High Power LED Fixtures- ≥4.5 to 9 W/ Ft of LED • Installed under the canopy • Replaces 2 fluorescent lamps • Low Power LED Fixtures- <4.5 W/ Ft of LED • Installed under the canopy, shelf or on the rail • Replaces 1 fluorescent lamp • Delamp Fluorescents • Canopy may have +3 rows of fluorescents • May delamp in combination with LED measure

  10. Calculations &Variable Assumptions

  11. Energy Savings Difference between annual Base and Proposed Consumption Direct Savings: Light Fixture Energy

  12. Energy Savings • Indirect Savings: Refrigeration Energy • Portion of direct consumption rejects heat inside case • Refrigeration system uses energy to remove heat

  13. Energy Savings • Assumed Values- Direct Power Consumption • Fluorescent Power (W / Ft of fixture)* • 1 Lamp T12 in Existing Case: 10 - Grainger (40 W, 4 ft) • 1 Lamp T8 in Existing Case: 8 - Grainger (32 W, 4 ft) • 1 Lamp T8 in New Case: 7 - Manufacturer Specs (28 W, 4 ft) • Drivers / Ballast Power • Magnetic Ballast (T12) 15% of lamp power- Grainger • Electronic Ballast (T8) 5% of lamp power- Grainger • LED Driver 10% of lamp power- Manufacturer Spec • LED Power (W / Foot of fixture) • Low Power (products range from 2.5 to 4.0): 4.0 • High Power (products range from 5.5 to 8.4): 7.0 • *Values doubled for two lamp fixtures.

  14. Energy Savings • Assumed Values- Indirect Power Consumption • Annual Avg. EER (Btu/hr / W) • Medium Temp System 10.9 - DOE2.2R Grocery Model • methodologypreviously approved by RTF • % Heat transferred to Refrigeration System • Lamps Inside Refrigerated Space: 100% - DOE* • Lamps Outside Refrigerated Space: 50% - DOE* • Drivers/Ballast 0% - DOE* • *Final Rule for Commercial Refrigeration Equipment; Analytical Spreadsheets. USDOE. January 2009. www.hillphoenix.com/techInfo/handbooks/pdfs/6DMLH.pdf

  15. Weighting Case Lighting Operational Hours* Weighting applied to all measures *from rebates processed by PECI for +1,000 ft of medium temp cases that were retrofitted with LEDs

  16. Weighting Placement of Single Lamp Rows in Open Cases* Weighting applied to Low Power LED measures only *from data collected for +3,400 lamps during EnergySmart Grocer audits at 67 sites in the PNW

  17. Costs Materials: Baseline (New Case Only) T8 Fixture- 2 Lamp $72.42 Grainger T8 Fixture- 1 Lamp $58.91 Grainger Materials: Measure High Power Fixture(4 ft) $119.57 Low Power Fixture (4 ft) $ 93.08 Driver (2 Fixtures/Driver) $ 56.30 Misc. Parts (per Fixture) $ 1.63 Prices from Distributor and marked up 25% Labor Per Fixture $ 25.00 Installed Cost Per Foot of Fixture Ft of High Power Fixture $ 43.58 Ft of Low Power Fixture $ 36.96

  18. Measure Life LED Fixtures PG&E Study 52,560 hours Product Claim 1 50,000 hours Product Claim 2 50,000 hours LED Drivers Product Claim 1 50, 000 hours Product Claim 2 50, 000 hours System 24 hr / day operation 6 years 18 hr / day operation 8 years

  19. Program Specifications • Restricted to refrigerated vertical or semi-vertical, open display cases (MT or LT). • Must replace existing fluorescent fixture with a permanently installed LED fixture and driver. • LED fixtures 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. • Incentives paid based on length of fixture. • LED fixtures must be controlled by any baseline controls or timeclocks or a control system equivalent to baseline controls must be installed. • Delamping measures must be combined with an LED retrofit measure.

  20. Conclusion PECI seeks approval for the following deemed measures:

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