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A new refrigerator-freezer combination unit is being designed with a dual-evaporator system to be used in a recreational vehicle. The freezer compartment is to be at -14.0°C and the refrigerator compartment is to be at 8.0°C. The outlet of the condenser is at 20.0°C. The cooling capacities of both the refrigerator and the freezer compartments are to be 200. kJ/h each. The system will use refrigerant R-134a with a compressor isentropic efficiency of 70.0%.

Determine

a. The coefficient of performance for this design.

b. The mass flow rate of refrigerant required.

c. The quality at the outlet of the refrigeration evaporator.

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  • Category:- Physics
  • Reference No.:- M92101700

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