A vapour compression refrigerator works between pressure limits of 10 bar and 3 bar. The working fluid is dry at the end of compression and there is no undercooling before the expansion valve. If refrigerant flow rate is 10 kg/min, determine (i) COP and (ii) the capacity of the refrigerant. Table for properties of the refrigerant is as under:
|
Pressure bar
|
Saturation temperature
|
Liquid heat kJ/kg
|
Latent heat kJ/kg
|
Liquid entropy kJ/kg K
|
|
10
|
25
|
298.90
|
1165.94
|
1.1242
|
|
3
|
–10
|
135.37
|
1297.68
|
0.5443
|