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Rapport 2414173 - October 2007 __________________________________________________________________ 4.4.Expansion devices and controls Transcritical heat pumps require high pressure control to minimize power consumption, as covered in Section 2.3. This optimal pressure is a function of evaporating pressure (or temperature) and R744 gas cooler outlet temperature. Figure 40 shows the location of a motorized control expansion valve, a solenoid valve (for defrost) and of a pressure sensor in a typical Ecocute unit for hot water supply. Figure 40 : Control valves and pressure sensor in an Ecocute unit Figure 41 : Control valves and sensor from Saginomiya The Ecocute units use electronic valves from Saginomiya, as shown in Figure 41. Electronic expansion valves that use information from operating parameters (water or R744 outlet __________________________________________________________________________________________ SHERPHA PROJECT - Transcritical R744 Heat Pumps – Technician's Manual 34/63PDF Image | Transcritical R744 (CO2) Heat Pumps 2017
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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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