Eligibility For this measure, a no-heat/low-heat clear glass door must be installed on an upright display case. It is limited to door heights of 57 inches or more. Doors must have either heat reflective treated glass, be gas filled, or both. This measure applies to low temperature cases only—those with a case temperature below 0°F. Doors must have 3 or more panes. Total door rail, glass, and frame heater amperage (@ 120 volt) cannot exceed 0.39 amps per linear foot for low temperature display cases. Rebate is based on the door width (not including case frame). Algorithms The energy savings and demand reduction are obtained through the following calculations adopted from Southern California Edison. California’s Assumptions: Indoor Dry-Bulb Temperature of 75oF and Relative Humidity of 55%, (4-minute opening intervals for 16-second), neglect heat conduction through doorframe / assembly. Compressor Savings (excluding condenser): = [Q-coolingsvg/EER/1000] Δ kWcompressor kWhcompressor = kW x EFLH Δ Δ Q-coolingsvg = Q-cooling x K-ASH Anti-Sweat Heater Savings: kWASH = ASH / 1000 Δ Δ kWhASH = kWASH x t Δ Δ Definition of Terms The variables in the above equation are defined below: Q-cooling = Case rating by manufacturer (Btu/hr/door) Q-coolingsvg = Cooling savings (Btu/hr/door) kWcompressor = Compressor power savings (kW/door) Δ kWASH = Reduction due to ASH (kW/door) Δ K-ASH = % of cooling load reduction due to low anti-sweat heater (Btu/hr/door reduction) ASH = Reduction in ASH power per door (watts/door) Δ kWhcompressor = Annual compressor energy savings (excluding condenser Δ energy), (kWh/door) kWhASH = Annual Reduction in energy (kWh/door) Δ EER = Compressor rating from manufacturer (Btu/hr/Watts)
Eligibility For this measure, a no-heat/low-heat clear glass door must be installed on an upright display case. It is limited to door heights of 57 inches or more. Doors must have either heat reflective treated glass, be gas filled, or both. This measure applies to low temperature cases only—those with a case temperature below 0°F. Doors must have 3 or more panes. Total door rail, glass, and frame heater amperage (@ 120 volt) cannot exceed 0.39 amps per linear foot for low temperature display cases. Rebate is based on the door width (not including case frame). Algorithms The energy savings and demand reduction are obtained through the following calculations adopted from California’s Southern California Edison. Assumptions: Indoor Dry-Bulb Temperature of 75oF and Relative Humidity of 55%, (4-minute opening intervals for 16-second), neglect heat conduction through doorframe / assembly. Compressor Savings (excluding condenser): Δ kWcompressor = [Q-coolingsvg/EER/1000] Δ kWhcompressor = Δ kW x EFLH Q-coolingsvg = Q-cooling x K-ASH Anti-Sweat Heater Savings: Δ kWASH = Δ ASH / 1000 Δ kWhASH = Δ kWASH x t Definition of Terms The variables in the above equation are defined below: Q-cooling = Case rating by manufacturer (Btu/hr/door) Q-coolingsvg = Cooling savings (Btu/hr/door) Δ kWcompressor = Compressor power savings (kW/door) Δ kWASH = Reduction due to ASH (kW/door) K-ASH = % of cooling load reduction due to low anti-sweat heater (Btu/hr/door reduction) Δ ASH = Reduction in ASH power per door (watts/door) Δ kWhcompressor = Annual compressor energy savings (excluding condenser energy), (kWh/door) Δ kWhASH = Annual Reduction in energy (kWh/door) EER = Compressor rating from manufacturer (Btu/hr/Watts)
1244820.docx