Ammonia enters the compressor of a refrigeration plant and is compressed from 190.2kPa, 98% dry to 972.2kPa with 50K of superheat. The refrigerant leaves the condenser as a liquid at 24°C and circulates with a mass flowrate of 5kg/min. Calculate: (a). compressor power (b). heat rejected in the condenser per minute (c). coefficient of performance (d). condition at entry to evaporator (e). plant capacity if enthalpy of fusion is 333kJ/kg

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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4.
Ammonia enters the compressor of a refrigeration plant and is compressed
from 190.2kPa, 98% dry to 972.2kPa with 50K of superheat. The refrigerant
leaves the condenser as a liquid at 24°C and circulates with a mass flowrate
of 5kg/min.
Calculate:
(a). compressor power
(b). heat rejected in the condenser per minute
(c). coefficient of performance
(d). condition at entry to evaporator
(e). plant capacity if enthalpy of fusion is 333kJ/kg
Ans: 17.442kW, 6543kJ/min, 5.2522, 0.1536, 23.769tonne/day
Transcribed Image Text:4. Ammonia enters the compressor of a refrigeration plant and is compressed from 190.2kPa, 98% dry to 972.2kPa with 50K of superheat. The refrigerant leaves the condenser as a liquid at 24°C and circulates with a mass flowrate of 5kg/min. Calculate: (a). compressor power (b). heat rejected in the condenser per minute (c). coefficient of performance (d). condition at entry to evaporator (e). plant capacity if enthalpy of fusion is 333kJ/kg Ans: 17.442kW, 6543kJ/min, 5.2522, 0.1536, 23.769tonne/day
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