A heat pump with refrigerant R22 is used for space heating between temperature limits of-20°C and 25°C. The heat required is 200 MJ/h. Assume specific heat of vapour at the timeof discharge as 0.98 kJ/kg.K. Other relevant properties are given below. The enthalpy (inkJ/kg) of the refrigerant at isentropic compressor discharge isPressureSpecific enthalpyP(MN/m²)SaturationtemperatureTsat (°C)-20250.24481.048h,(kJ/kg)177.21230.07hg(kJ/kg)397.53413.02Specific entropyS,(kJ/kg/K0.91391.1047S₂(kJ/kg.K)1.78411.7183

Given data. Heat pump with refridegerant R22. T1=-200C=-20+273=253K T2=25=25+73=298KHeat…

Answered: e refrigerant at isentropic compressor…

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e refrigerant at isentropic compressor discharge is

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Question

A heat pump with refrigerant R22 is used for space heating between temperature limits of
-20°C and 25°C. The heat required is 200 MJ/h. Assume specific heat of vapour at the time
of discharge as 0.98 kJ/kg.K. Other relevant properties are given below. The enthalpy (in
kJ/kg) of the refrigerant at isentropic compressor discharge is
Pressure
Specific enthalpy
P(MN/m²)
Saturation
temperature
Tsat (°C)
-20
25
0.2448
1.048
h,(kJ/kg)
177.21
230.07
hg(kJ/kg)
397.53
413.02
Specific entropy
S,(kJ/kg/K
0.9139
1.1047
S₂(kJ/kg.K)
1.7841
1.7183

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