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An open air refrigeration system carries a load of 35 kW with a suction pressure of 103 kPa and a discharge pressure of 690 kPa.

An open air refrigeration system carries a load of 35 kW with a suction pressure of 103 kPa and a discharge pressure of 690 kPa. The temperature leaving the refrigerator is 5 °C and that leaving the cooler is 30 °C. The compression is polytropic with n = 1.33 and the expansion is also polytropic but with n = 1.35. Determine the power required and the COP.


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