Thermodynamics Forum

In a standard vapor compression refrigeration cycle, operating between an evaporator temperature of -10 C and a condenser temperature of 40 C, the enthalpy of the refrigerant, R12 (Freon 12) at the end of compression is 220 kJ/Kg. Show the cycle diagram on T-s plane.

Calculate,

A. The COP of the cycle

B. The refrigerating capacity and the compressor power assuming a refrigerant flow rate of 1 kg/min

You may use the exact of the R12 property table given below.

At -10 C,

P = 0.2191 MPa

hf = 26.85 kJ/kg

hg = 183.1 kJ/kg

At 40 C,

P = 0.9607 MPa

hf = 74.53 kJ/kg

hg = 203.1 kJ/kg

Answer:

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