An ammonia refrigeration plant operating between pressures of 1167kPa and 268kPa is to produce 0.5tonne of ice per hour from water at 0°C. The temperature after isentropic compression is 80°C and there is 4°C of undercooling in the condenser.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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6.
An ammonia refrigeration plant operating between pressures of 1167kPa
and 268kPa is to produce 0.5tonne of ice per hour from water at 0°C. The
temperature after isentropic compression is 80°C and there is 4°C of
undercooling in the condenser.
Calculate:
(a).the condition or the refrigerant at the beginning of compression
(b). the condition of the refrigerant entering the evaporator
(c). the mass flowrate of the refrigerant in kg/min
(d). the compressor power
(e). the heat rejected in the condenser per minute
Transcribed Image Text:6. An ammonia refrigeration plant operating between pressures of 1167kPa and 268kPa is to produce 0.5tonne of ice per hour from water at 0°C. The temperature after isentropic compression is 80°C and there is 4°C of undercooling in the condenser. Calculate: (a).the condition or the refrigerant at the beginning of compression (b). the condition of the refrigerant entering the evaporator (c). the mass flowrate of the refrigerant in kg/min (d). the compressor power (e). the heat rejected in the condenser per minute
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