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Figure 5.8 The measured COP at 35/30oC supply/return temperatures for the SH system and varying DHW temperature. 5 – Experimental Results 4.0 3.5 3.0 2.5 7.5 8.0 8.5 9.0 9.5 10.0 Gas Cooler Pressure [MPa] 3.89 3.57 3.44 35/33°C, 60°C 35/30°C, 70°C 35/30°C, 80°C 4.0 3.5 3.0 2.5 7.5 8.0 8.5 9.0 9.5 10.0 Gas Cooler Pressure [MPa] 40/35 40/35 40/35 °C, 60°C °C, 70°C °C, 80°C 3.86 3.50 3.24 Figure 5.9 The measured COP at 40/35oC supply/return temperatures for the SH system and varying DHW temperature. At constant supply/return temperatures for the space heating system, the maximum COP for the heat pump unit decreased quite rapidly when the hot water temperature was increased from 60 to 80oC. The measured average reduction of the maximum COP at 33/28, 35/30 and 40/35oC supply/return temperatures were about 0.5, 0.6 and 0.8%, respectively, per K rise in the hot water temperature. The falling COP was mainly a result of decreasing water flow rate at increasing set-point temperature, which led to less cool-down of the CO2 in the DHW preheating gas cooler and thus a higher temperature approach. The variation in the power input to 121 COP [-] 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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