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6% 5% 4% 3% 2% 1% 0% 6500 7500 8500 9500 Entropy produced in gas cooler From gas cooler at 0 evap From gas cooler at -5 evap From gas cooler at 5 evap Gas cooler pressure (kPa) Entropy produced in evaporator 6% 5% 4% 3% 2% 1% 0% 6000 7000 8000 9000 Gas cooler pressure (kPa) From evaporator at 0 evap From evaporator at -5 From evaporator at 5 evap Figure 51 Entropy produced in gas cooler and evaporator 100% 80% 60% 40% 20% 0% Entropy production in components Gas cooler pressure (kPa) Entropy production in expansion valve Entropy production in compressor Entropy production in evaporator Entropy production in gas cooler Figure 52 Entropy production in components against gas cooler pressure Exergy efficiency of the components (gas cooler, expansion valve, evaporator and compressor) is shown in figure 53 and 54. Results showed most of (about 40%) the exergy losses occur in compressor, contribution from evaporator and expansion valve was almost same (about 23% from each) and was less than compressor, while least value for exergy losses was found for the gas cooler and was about 14% of total losses. On average exergetic efficiency for the compressor was about 70% (at 5 C evaporation) while for evaporator it was 22%, so there is more room for imporvement in evaporator as compared with compressor. 46 8610 8660 8670 8820 8820 8830 8880 8930 8930 8950 9050 9080 9110 9160 9160 9180 9220 9350 Contribution Entropy Production ContributionPDF 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
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