For the common refrigerants R-12, R-22, R-123, R-134a, R-507A and R717. Estimate the following important characteristics...

 

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For the common refrigerants R-12, R-22, R-123, R-134a, R-507A and R717. Estimate the following important characteristics when used in a standard vapor compression cycle operating between the same two evaporation and condensation temperatures of -15°C and 30°C, respectively. The required cooling capacity is 1 kW. a) Evaporation Pressure b) Condensation Pressure c) Compression Ratio d) Compressor Exit Temperature e) Refrigerating Effect f) Refrigerant Mass Flow Rate g) COPstd (coefficient of performance of standard vapor compression cycle) h) Refrigerating Efficiency (COPstd/COPcarnot) Also, comment on the major differences observed. For the common refrigerants R-12, R-22, R-123, R-134a, R-507A and R717. Estimate the following important characteristics when used in a standard vapor compression cycle operating between the same two evaporation and condensation temperatures of -15°C and 30°C, respectively. The required cooling capacity is 1 kW. a) Evaporation Pressure b) Condensation Pressure c) Compression Ratio d) Compressor Exit Temperature e) Refrigerating Effect f) Refrigerant Mass Flow Rate g) COPstd (coefficient of performance of standard vapor compression cycle) h) Refrigerating Efficiency (COPstd/COPcarnot) Also, comment on the major differences observed.

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a Evaporation Pressure R12 Approximately 201 kPa R22 Approximately 328 kPa R123 Approximately 172 kP... View the full answer