1. A refrigerated room is kept at -18C by a vapor- compression cycle with refrigerant. Heat...

 

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1. A refrigerated room is kept at -18°C by a vapor- compression cycle with refrigerant. Heat is rejected to cooling water that enters the condenser at 14°C at a rate of 0.35 Water 14 °C 22 °C R-134a as the 1.2 MPa QH 1.2 MPa 50 °C 5 °C subcool kg/s and leaves at 22°C. The refrigerant enters the condenser at 1.2MPA and 50°C and leaves Condenser at the same pressure subcooled by 5°C. If the compressor consumes determine 5.5 kW of power, Expansion valve Win Compressor (a) the mass flow rate of the refrigerant, (b) the refrigeration load and the COP, (c) the second-law efficiency of the refrigerator and the total exergy destruction in the cycle, and (d) the exergy destruction in the condenser. Take specific heat of water to be 4.18 kJ/kg-°C. Evaporator QL 1. A refrigerated room is kept at -18°C by a vapor- compression cycle with refrigerant. Heat is rejected to cooling water that enters the condenser at 14°C at a rate of 0.35 Water 14 °C 22 °C R-134a as the 1.2 MPa QH 1.2 MPa 50 °C 5 °C subcool kg/s and leaves at 22°C. The refrigerant enters the condenser at 1.2MPA and 50°C and leaves Condenser at the same pressure subcooled by 5°C. If the compressor consumes determine 5.5 kW of power, Expansion valve Win Compressor (a) the mass flow rate of the refrigerant, (b) the refrigeration load and the COP, (c) the second-law efficiency of the refrigerator and the total exergy destruction in the cycle, and (d) the exergy destruction in the condenser. Take specific heat of water to be 4.18 kJ/kg-°C. Evaporator QL