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2-10. The heating percentage is the amount of heating attainment level, a ratio of heating produced by the CO2 heat pump system in a day with respect to the actual heating load in a day. The cooling COP decreases by a unit of one as the heating percentage increases. However, the gain in heating COP makes the overall system attractive. COP with heating percentage 22 7 6 5 4 3 2 1 0 50% 60% 70% 80% Heating percentage 90% 100% Figure 2-10. COP vs heating percentages. 16 MPa is the highest discharge pressure that a commercially available CO2 compressor can withstand (Britzer, 2015). Hence a condition is included in the model that stops the increase in discharge pressure if such a state arises. There are some days (Winter days) in the year when there is excessive heating requirement which can lead to such a condition. Supplement heating is required to fulfil the heating load of such days. This supplement heating can be provided by power plants or by designing appropriate storage to meet the extra heating load. Figure 2-11 and Figure 2-12 show the P-h diagram for the CO2 cycle on a typical cold day in November and a hot day in July respectively. COPPDF Image | CO2 HEAT PUMPS FOR COMMERCIAL BUILDING APPLICATIONS
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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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