Question

A cold storage is to be maintained at – 5°C while the surroundings are at 35°C. The heat leakage from the surroundings into the cold storage is estimated to be 29 kW. The actual C.O.P. of the refrigeration plant used is one third that of an ideal plant working between the same temperatures. Find the power required to drive the plant.

Answer 1

T₂ = – 5 + 273 = 268 K ; 

T₁ = 35 + 273 = 308 K 

Heat leakage from the surroundings into the cold storage = 29 kW

(where R_n = net refrigerating effect, and W = work done)

Hence power required to drive the plant = 12.98 kW.