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Compressor Exergy supplied: Exergy recovered: Expansion valve Exergy loss: Losses in exergy value and produced entropies were calculated by considering the expansion process as isenthalpic (having constant enthalpy) and furthermore losses occurred within the pipes were considered negligible. Figure 50-52 shows the contribution of four components in overall entropy production. In this particular case compressor and expansion valve are the major sources of entropy production in the system. Entropy produced in expansion valve 70% 60% 50% 40% 30% 20% 10% 0% 6500 7500 From EV at 0 evap From EV at -5 evap From EV at 5 evap Gas cooler pressure (kPa) 8500 9500 70% 60% 50% 40% 30% 20% 10% 0% 6500 From compressor at 0 evap From compressor at -5 evap From compressor at 5 evap Entropy produced in compressor 7500 8500 9500 Gas cooler pressure (kPa) Figure 50 Entropy produced in expansion valve and compressor 45 Contribution ContributionPDF Image | heat recovery from R744 based refrigeration system
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