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HPWH Performance Report 2. Overview of Technology This section provides an overview of the two technologies tested. 2.1 Sanden CO2 Heat Pump Water Heater The Sanden CO2 heat pump units consist of: ➢ One outdoor unit with compressor, condenser, evaporator, heat exchanger, pump, etc. The unit uses outdoor air as a heat source and CO2 as the refrigerant. (Model GUS-A45HPA or GS3- A45HPA)7 ➢ One indoor water tank with water loop and thermistor connection to outdoor unit to provide a start/stop signal. a. 160-litre (43-gallon) option – Model GAUS-160QQTA (SAN-43SSAQA) b. 315-litre (83-gallon) option – Model GAUS-315EQTD (SAN-83SSAQA) ➢ Heat trace and insulation8 on exterior water pipes to prevent freezing. ➢ Manufacturer rated performance: a. 3.09 EF , 2.9 UEFNC9 (160-litre system) b. 3.84 EF , 3.3 UEFNC (315-litre system) c. -29 to 60°C (-20 to 140°F) ambient air temperature operating range d. Tier 3 Advanced Water Heater Specification (formerly Northern Climate Spec) ➢ All Sanden units are factory-shipped with 65°C (149°F) hot water temperature set-point 2.2 Rheem Integrated Heat Pump Water Heater The Rheem integrated heat pump units consist of: ➢ One integrated unit with hot water tank, compressor, condenser, evaporator, backup heating element and controls combined; the unit uses outdoor air or indoor air as the heat source depending on if the system is ducted or unducted. a. 246-litre (65-gallon) option – Model PROPH65 T2 RH350 b. 303-litre (80-gallon) option – Model PROPH80 T2 RH350 ➢ Manufacturer rated performance a. 3.5 EF, 3.4 UEFNC (246 and 303-litre systems) b. 2.8 to 62.8°C (37 to 145°F) ambient air operating range c. Tier 3 Advanced Water Heater Specification (formerly Northern Climate Spec) ➢ All Rheem units were shipped with factory-default hot water temperature 7 See Appendix for Sanden and Rheem product specification sheets provided by the manufacturers. 8 Heat trace and insulation is not provided by the manufacturer. 9 Uniform Energy Factor NC from Advanced Water Heater Specification (formerly Northern Climate Specification). Source: neea.org/advancedwaterheaterspec 5PDF Image | CO2 Integrated Heat Pump Water Heater
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
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