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5 – Experimental Results 4.0 3.5 3.0 2.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 Gas Cooler Pressure [MPa] 3.80 3.58 3.09 60°C 70°C 80°C Figure 5.28 The measured COP in the DHW mode as a function of the high-side pressure at varying DHW temperature. 100 80 60 40 20 0 02468 Heating Capacity [kW] 10.0 MPa DHW: 70°C A C COP 3.56 100 80 60 40 20 0 02468 Heating Capacity [kW] 9.0 MPa DHW: 60°C A C COP 3.80 Figure 5.29 The heat transfer process for the gas cooler in the DHW mode illustrated in T-Q diagrams at 60 and 70oC DHW temperature and optimum high-side pressure. According to Figure 5.28, the maximum COP and the corresponding opti- mum high-side pressure were not determined for the 80oC hot water mea- suring series, since the CO2 heat pump unit could not be operated above 10.8 MPa high-side pressure due to motor load limitations. Figure 5.30 shows the measured COP for the CO2 heat pump unit as a function of the temperature approach at varying hot water temperature, while Figure 5.31 demonstrates the relationship between the high-side pressure and the temperature approach. 136 Temperature [°C] Temperature [°C] COP [-]PDF Image | Residential CO2 Heat Pump System for Combined
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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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