A refrigerating system workingon Bell-Coleman cyclereceivesair from cold chamber at -5'C and compresses it from I bar to 4.5 bar. The compressed air is then cooled to a temperature of 37°C before it is expanded in the expander. Calculate the C.O.P. of the system whencompression and expansion are (i) isentropic; and (ii) followthe law pyl= constant.
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