A vapour compression refrigerator uses methyl chloride (R-40) and operates between pressure limits of 177.4 kPa . At entry to the compressor, the methyl chloride is dry saturated and after compression has a temperature of 102°C .The compressor has a bore and stroke of 75mm and runs at 8 rev/s with a volumetric efficiency of 80%. The temperature of the liquid refrigerant as it leaves the condenser is 35°C and its specific heat capacity is 1.624 kJ/kg. K. The specific heat capacity of the superheated vapour may be assumed to be constant. Determine: (a) refrigerator C O P (b) Mass flow rate of refrigerant and (c) Cooling water required by the condenser if its temperature rise is limited to 12°C. Specific heat capacity of water = 4.187 kJ/kg.K.
A vapour compression refrigerator uses methyl chloride (R-40) and operates between pressure limits of 177.4 kPa . At entry to the compressor, the methyl chloride is dry saturated and after compression has a temperature of 102°C .The compressor has a bore and stroke of 75mm and runs at 8 rev/s with a volumetric efficiency of 80%. The temperature of the liquid refrigerant as it leaves the condenser is 35°C and its specific heat capacity is 1.624 kJ/kg. K. The specific heat capacity of the superheated vapour may be assumed to be constant. Determine: (a) refrigerator C O P (b) Mass flow rate of refrigerant and (c) Cooling water required by the condenser if its temperature rise is limited to 12°C. Specific heat capacity of water = 4.187 kJ/kg.K.
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