A vapour compression refrigerator uses methyl chloride and works in the pressure range of 11.9 bar and 5.67 bar. At the beginning of the compression, the refrigerant is 0.96 dry and at the end of isentropic compression, it has a temperature of 55°C. The refrigerant liquid leaving the condenser is saturated. If the mass flow of refrigerant is 1.8 kg/min. Determine : (i) Co-efficient of performance. (ii) The rise in temperature of condenser cooling water if the water flow rate is 16 kg/min.

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter22: Condensers
Section: Chapter Questions
Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...
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A vapour compression refrigerator uses methyl chloride and works in the pressure range of 11.9 bar and
5.67 bar. At the beginning of the compression, the refrigerant is 0.96 dry and at the end of isentropic
compression, it has a temperature of 55°C. The refrigerant liquid leaving the condenser is saturated. If the
mass flow of refrigerant is 1.8 kg/min. Determine :
(i) Co-efficient of performance.
(ii) The rise in temperature of condenser cooling water if the water flow rate is 16 kg/min.
(iii) The ice produced in the evaporator in kg/hour from water at 15°C and ice at 0°C. Take : Specific enthalpy of fusion of ice = 336 kJ/kg
Specific heat of water = 4.187 kJ/kg.

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