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Variable Capacity Heat Pump RTF Sub-Committee October 26 , 2011

Variable Capacity Heat Pump RTF Sub-Committee October 26 , 2011. Mira Vowles, P.E., CEM Emerging Technology Project Manager BPA Energy Efficiency. PNW Small Office Baseline Energy Use per SF. Based on EnergyPro model for PNW locations. PNW Small Office VC HP Energy Use per SF.

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Variable Capacity Heat Pump RTF Sub-Committee October 26 , 2011

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  1. Variable Capacity Heat Pump RTF Sub-CommitteeOctober 26, 2011 Mira Vowles, P.E., CEM Emerging Technology Project Manager BPA Energy Efficiency

  2. PNW Small Office Baseline Energy Use per SF Based on EnergyPro model for PNW locations

  3. PNWSmall Office VC HP Energy Use per SF Based on EnergyPro model for PNW locations

  4. Small Office VRF Savings Summary

  5. PNWMedium Office Energy Use Based on EnergyPro model for PNW locations

  6. PNWMedium Office Baseline Energy Use per SF Based on EnergyPro model for PNW locations

  7. PNWMediumOffice VC HP Energy Use per SF Based on EnergyPro model for PNW locations

  8. Medium Office VRF Savings Summary

  9. Small Office VRF Cost Effectiveness

  10. Medium Office VRF Savings Summary

  11. Proposed VRF Measures

  12. Variable Refrigerant Flow System Definition Variable refrigerant flow (VRF) systems, either heat-pump or heat-recovery styles, provide heating and air-conditioning, and typically consist of: 1. An outdoor unit with inverter driven compressor(s) and condenser fan, over 6 tons of capacity (72,000 Btu/h), 2. Multiple indoor units with multi-speed fans, electronic expansion devices and dedicated microprocessors, 3. Refrigerant piping between the outdoor and indoor units, 4. A zone temperature control device interlocked with a system controller.

  13. Office Building Definition • A building used primarily for office functions, including desk-work, reading and light equipment (computer, copier, printer, telephone, etc.) use. • Office occupancies are further defined by • overall occupant densities between 50 and 300 square feet per person, • overall lighting power densities between 0.5 and 2 watts per square foot, and • overall equipment plug loads between 0.1 and 1.5 watts per square foot.

  14. Office Building Definition • Can whole building regression analysis be used to verify savings? • How many systems need to be evaluated? • How can buildings with significant other changes be excluded? • Other?

  15. VRF Program Evaluation Questions • Can whole building regression analysis be used to verify savings? • How many systems need to be evaluated? • How can buildings with significant other changes be excluded? • Other?

  16. VRF Program Delivery Questions • Can this be a utility equipment rebate program, instead of an upstream program? • Limit to replacement on burn-out? • How to ensure replacement on burn-out? • Limit to baseline systems? • How to ensure baseline systems? • Other?

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