(a) A food compartment is to be maintained at 21°C by a refrigeration system. The total cooling load of the food compartment is estimated to be 330 kJ/h and the heat rejection by the condenser is 480 kJ/h. The outdoor air temperature is 35°C. i) draw the schematic diagram of the refrigeration system ii) determine the power input required to operate the refrigeration system in kW. (b) A heat pump operates on a Reversed Carnot cycle with a COP of 7. It keeps the temperature of a space at 23°C by consuming 2.5 kW of power. i) draw the schematic diagram of the heat pump ii) find the temperature of the reservoir from which the heat is absorbed in °C. iii) find the heating load provided by the heat pump in kW.
(a) A food compartment is to be maintained at 21°C by a refrigeration system. The total cooling
load of the food compartment is estimated to be 330 kJ/h and the heat rejection by the
condenser is 480 kJ/h. The outdoor air temperature is 35°C. i) draw the schematic diagram of the refrigeration system
ii) determine the power input required to operate the refrigeration system in kW.
(b) A heat pump operates on a Reversed Carnot cycle with a COP of 7. It keeps the temperature
of a space at 23°C by consuming 2.5 kW of power. i) draw the schematic diagram of the heat pump
ii) find the temperature of the reservoir from which the heat is absorbed in °C.
iii) find the heating load provided by the heat pump in kW.
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