An inventor comes to you saying he has invented a refrigerator that maintains a room at 20F while operating in a location at 80F with a coefficient of performance of 8.5, is this possible?

(9) The coefficient of performance of a residential heat pump is 2.85. If the input power to this heat pump is 2.7 kW, Calculate the rate of heat supply to the house, in kJ/h.

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Refrigerators to preserve perishable foods have long been one of the essential appliances in a household. The refrigeration system of the household refrigerator is basically based on the vapor-compression refrigeration cycle, as shown in Figure Q2.1. Among the important components of the vapor-compressions refrigeration cycle are a throttling valve (A) and a compressor (B). In this refrigeration system, tetrafluoroethane (R-134a) is used as the refrigerant. Condenser W B A Evaporator Figure Q2.1: Basic components of a refrigeration system. (a) If the refrigerant enters A as a saturated liquid at 1100 kPa and leaves at 120 kPa, (i) Estimate the quality of the refrigerant at the exit of A. (ii) Calculate the temperature drop during the process. (iii)With appropriate assumptions, prove that the conservation of energy for A as follows the equation below, h= h2 (b) If the refrigerant enters B as a saturated vapor at 120 kPa with flow rate of 1.5 m³/min and leaves at 1100 kPa, (i) Calculate…