A refrigeration system has ammonia as the refrigerant. The pressure and temperature entering the compressor are 30 psi and 10A????1F and the pressure and temperature leaving the compressor are 200psi and 300A????1F. The fluid leaving the condenser is at 200psi and 90A????1F. The rate of heat out of the condenser is 50,000 Btu/hr.


a) The specific work of the compressor in Btu/lbm

b) The mass flow rate of the ammonia in the system

c) The power required by the compressor in hp

d) The cooling capacity in tons of refrigeration

e) The coefficient of performance


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