A refrigeration cycle uses Freon-12 as working find. The temperature of the refrigerant in the evaporator is – 100 C. The condensing temperature is 400 C. the cooling load is 150 W and the volumetric efficiency of the compressor is 80%. The sped of the compressor is 720 rpm. Calculating the mass flow rate of the refrigerant and the displacement volume of the compressor.
Properties of Freon – 12
|
Temp (0 C)
|
Saturation pressure (MPa)
|
Enthalpy (kJ/kg)
Saturated
|
Specific volume (m3/kg) Saturated vapour
|
|
Liquid
|
Vapour
|
|
|
- 10
|
0.22
|
26.8
|
183.0
|
0.08
|
|
40
|
0.969
|
74.5
|
203.1
|
0.02
|