A refrigerator uses R-134a as its refrigerant and operates on an ideal vapour compression refrigeration cycle between 0.14 MPa and 0.8 MPa. If the mass flow rate of the refrigerant is 0.05 kg/s, the rate of heat rejection to the environment is _________kW. Given data:
At P = 0.1 MPa, h = 236.04 kJ/kg,
s = 0.9322 kJ/kg-K
At P = 0.8 MPa,
h = 272.05 kJ/kg (superheated vapour)
At P = 0.8 MPa,
h = 93.42 kJ (saturated liquid)