Example 25.9 A refrigeration cycle uses Freon-12 as the working fluid. The temperature of the refrigerant in the evaporator is –10°C. The condensing temperature is 40°C. The cooling load is 150 W and the volumetric efficiency of the compressor is 80%. The speed of the compressor is 720 rpm. Calculate the mass flow rate of the refrigerant and the displacement volume of the compressor.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Example 25.9 A refrigeration cycle uses Freon–12 as the working fluid. The temperature of
the refrigerant in the evaporator is -10°C. The condensing temperature is 40°C. The cooling load
is 150 W and the volumetric efficiency of the compressor is 80%. The speced of the compressor is
720 rpm. Calculate the mass flow rate of the refrigerant and the displacement volume of the
compressor.
Properties of Freon–12
Temperature C Saturation Enthalpy (kJ/kg) saturated Specific volume (m²/kg)
pressure MPa Liquid
Vapour
saturated vapour
-10
0.22
26.8
183.0
0.08
40
0.96
74.5
203.1
0.02
Transcribed Image Text:Example 25.9 A refrigeration cycle uses Freon–12 as the working fluid. The temperature of the refrigerant in the evaporator is -10°C. The condensing temperature is 40°C. The cooling load is 150 W and the volumetric efficiency of the compressor is 80%. The speced of the compressor is 720 rpm. Calculate the mass flow rate of the refrigerant and the displacement volume of the compressor. Properties of Freon–12 Temperature C Saturation Enthalpy (kJ/kg) saturated Specific volume (m²/kg) pressure MPa Liquid Vapour saturated vapour -10 0.22 26.8 183.0 0.08 40 0.96 74.5 203.1 0.02
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