A four cylinder, single acting R-12 compressor 35 cm x 40 cm runs at 1000 r.p.m. The compressor clearance factor is 0.04 and the law of compression pV1.1=C. the operating pressures for the vapour compression refrigeration system are: 8.47 bar (350C) and 1.004bar (-300C). The refrigerant temperatures are: entering the compressor -200C, leaving the compressor 500C; entering the condenser 450C, leaving the condenser 250C, entering the expansion valve 300C and leaving the evaporator dry saturated. Assuming that heat removed in the compressor is 26 kJ/sec. calculate: The refrigerating capacity, The compressor power COP, Mass of condensing cooling water assuming the rise in temperature to be 100         Tabulate energy balance for 1 kg of refrigerant

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
Chapter44: Geothermal Heat Pumps
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A four cylinder, single acting R-12 compressor 35 cm x 40 cm runs at 1000 r.p.m. The compressor clearance factor is 0.04 and the law of compression pV1.1=C. the operating pressures for the vapour compression refrigeration system are: 8.47 bar (350C) and 1.004bar (-300C). The refrigerant temperatures are: entering the compressor -200C, leaving the compressor 500C; entering the condenser 450C, leaving the condenser 250C, entering the expansion valve 300C and leaving the evaporator dry saturated. Assuming that heat removed in the compressor is 26 kJ/sec. calculate:

  • The refrigerating capacity,
  • The compressor power
  • COP,
  • Mass of condensing cooling water assuming the rise in temperature to be 100

        Tabulate energy balance for 1 kg of refrigerant

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