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Figure 7-22 outside air air rev. valve outdoor unit outside air/dirt/mag separator variable-speed pressure-regulated circulator air vent spring check diverter valve indoor unit zone valves purge valves tankless electric water heater DHW ASSE 1017 anti-scald valve CW split system air-to-water heat pump (in heating mode) temperature setpoint controller (do not set above 120 oF) AB B A max 130 oF 3-pipe buffer tank indirect water heater with LARGE internal heat exchanger condenser heating mode refrigerant line set inside compressor TXV evaporator outside When this approach is used, it is critically important to specify an indirect tank with a large internal coil that allows the full rate of heat production from the heat pump to dissipate into the domestic water without forcing the heat pump’s condenser temperature above 130oF. Failure to do this will cause the heat pump’s operating temperature to quickly rise to a value at which an internal safety control turns off the compressor. It is also important to realize that the heat pump alone cannot generate domestic water temperature above approximately 120oF. When higher DHW delivery temperatures are needed, some form of supplemental heat input will be required. An electric tankless water heater is one option, as shown in Figure 7-22. Some air-to-water heat pumps have internal controls that can treat domestic water heating as a priority load. When a contact in the setpoint controller monitoring water temperature in the indirect tank calls for heating, the heat pump powers on the diverting valve. This directs all flow from the heat pump through the internal coil of the 65PDF Image | Heat Pump Systems 2020
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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
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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