engineering recuitment NHPC JE & THDC JE 2023 Mock Test Refrigeration and Air Conditioning Refrigeration Cycles and Devices Heat Engine, Heat Pump and Refrigerator
A refrigerator uses R-12 and operates on an ideal vapor compression cycle has condenser temperature of 45°C and an evaporator temperature of −15 °C. What will be the coefficient of performance of the cycle? (Given the following data)
Specific enthalpy of saturated vapour at –15°C = 180 kJ/kg,
Specific enthalpy of saturated liquid at 45°C = 80 kJ/kg,
Specific work done by compressor = 32 kJ/kg
1
3.125
2
4.125
3
3.525
4
2.725