1- In a simple cooling cycle for a household refrigerator R134a is used as the refrigeration,…

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1- In a simple cooling cycle for a household refrigerator R134a is used as the refrigeration, evaporator temperature (-20 °C) and the coolant temperature in the condenser (30°C) the refrigeration enters the compressor as saturated steam (x=1) if the flow rate of the refrigerant is (0.9 kg/s) calculate the following:

o Compressor Work

o Cooling effect

o Evaporator load

o Heat lost from the condenser

o COP

2- Cooling system used R404a as a refrigeration. the compressor work is 18kw, the pressure in the condenser 10 bar, the evaporator pressure 3 bar. Calculate the following:

o Refrigeration flow rate.

o Heat lost from the condenser

o Evaporator load

o Refrigeration effect

o COP

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