Refrigerant 134a is a working fluid in an ideal vapor compression refrigeration cycle with a cold region at 0°C and a warm region at 26°C. Saturated vapor enters the compressor at 0°C and saturated liquid leaves the condenser at 26°C, The mass flow rate of the refrigerant is 0.08% kg/s. Determine (a) the enthalpies at states 1 and 2, (b) the compressor power (kW), (c) the enthalpy at state 4, (d) the refrigeration capacity (kJ/s) (the heat transfer rate to the refrigerant), (e) the coefficient of performance.

Refrigerant 134a is a working fluid in an ideal vapor compression refrigeration cycle with a cold region at 0°C and a warm region at 26°C. Saturated vapor enters the compressor at 0°C and saturated liquid leaves the condenser at 26°C, The mass flow rate of the refrigerant is 0.08% kg/s. Determine (a) the enthalpies at states 1 and 2, (b) the compressor power (kW), (c) the enthalpy at state 4, (d) the refrigeration capacity (kJ/s) (the heat transfer rate to the refrigerant), (e) the coefficient of performance.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?

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