The COP of the refrigerator is

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Direction: A refrigerator based on ideal vapour compression cycle operates between the temperature limits of –20°C and 40°C. The refrigerant enters the condenser as saturated vapour and leaves as saturated liquid. The enthalpy and entropy values for saturated liquid and vapour at these temperatures are given in the table below.

T	h_f	h_g	s_f	s_g
(°C)	(kJ/kg)	(kJ/kg)	(kJ/kgK)	(kJ/kgK)
–20	20	180	0.07	0.7366
40	80	200	0.3	0.67

The COP of the refrigerator is

1. 2.0
2. 2.33
3. 5.0
4. 6.0

Correct Option: B

C.O.P =	h₂ – h₁
	h₃ – h₂

C.O.P =	164 – 80	=	84	= 2.33
	200 – 164		36