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Figure 23 T_h diagram for 1st Heat exchanger Cooling profile of CO2 and heating profile of water for this specific case (for 1st heat exchanger in operation) is shown in figure 23. Cooling and heating curves (for CO2 and water respectively) are quite close to each other, better matching of cooling and heating cooling curves results in improved heat transfer. 60% 50% 40% 30% 20% 10% Lorenz efficiency with gas cooler side pressure Water 16-60 oC 0% 7500 8000 8500 Lorenz efficiency at 0C evaporation Lorenz efficiency at 5C evaporation Lorenz efficiency at -5C evaporation Gas cooler side pressure (kPa) 9000 9500 Figure 24 Lorenz efficiency (enthalpic mean temperature) with gas cooler side pressure It is hard to get a clear picture from the plot of actual COP so Lorenz efficiency (actual COP of the heat pump compared with the Lorenz COP) is plotted against the gas cooler pressure to see how this is going to vary with the evaporation temperature. COPLZ is based on the mean temperature during the heat rejection process, entropic mean temperature is used in this case due to variable temperature heat transfer process. Temperature at which primary fluid has same 25 EfficiencyPDF Image | heat recovery from R744 based refrigeration system
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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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