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LED Case Lighting With and Without Motion Sensors. Michele Friedrich – Sr. Engineer PECI 1/5/2010. Acknowledgements. We would like to thank the following utilities for support BPA PSE AVISTA. Purpose.

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LED Case Lighting With and Without Motion Sensors

  • Michele Friedrich – Sr. Engineer

  • PECI

  • 1/5/2010


Acknowledgements l.jpg
Acknowledgements

  • We would like to thank the following utilities for support

  • BPA

  • PSE

  • AVISTA


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Purpose

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


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Agenda

  • Background

    • PECI experience

    • Market

  • Measures to approve

    • Description of Measure

    • Baseline

    • Measure

  • Energy Savings

  • Cost

  • Measure Life

  • Technical and Program Specifications

  • Conclusions


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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.


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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


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Background

  • PECI previous experience

    • LED case lights installed in 2009 from PECI rebates - % of lights by Watts per linear foot of lamp


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Background

  • Market Size


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Measures

  • Description of Measure

    • Refrigerated, Reach-in, Display Case Lighting

      • Reduce lamp electrical demand: Change Fluorescent to LED

      • Reduce Hours: Incorporate Motion Sensor



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Old Measures 18hr/day

Input for B/C calculator for New Measure cost is $99/ln ft in 2008 Dollars


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Old Measures, 24 hr/day

Input for B/C calculator for New Measure cost is $99/ln ft in 2008 Dollars

12


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Measures

  • Description of Baseline

    Across all baselines:

    • Reach-in refrigerated display case.

      Different baselines for implementation

    • Lamp (T12, T8, LED)

    • Retrofit or New


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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 / linear ft of LED)

    • Add Motion Sensor to LED

      • LED wattage – Side bars less than Mullion Bars. Addressed with bins (W / linear ft of LED)


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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)


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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.


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    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



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    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)


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    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)


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    Energy Savings

    • Graph of PNNL daily motion sensor activated light data


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    Energy Savings

    Data from SMUD and Large Chain case lighting motion sensor demonstrations

    SMUD:

    51% Hrs at 20% W

    Large Chain


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    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


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    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


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    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).


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    Conclusion

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