The power input to the refrigerant vapour is 150kW and the mechanical efficiency of the compressor is
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Question:
The power input to the refrigerant vapour is 150kW and the mechanical efficiency of the compressor is 96%. The refrigerant is ammonia, the evaporation temperature for which is -7C and the condensation temperature is 48C. The ammonia can be assumed to be dry saturated at entry to the compressor and the liquid ammonia is cooled 46C on leaving the condenser. The refrigeration rate in the ice rink for the power input is 460kW. calculate;
1) The mass flow rate of refrigerant
2) The isentropic efficiency of the compression process
3)The heat available for heating purposes
Related Book For
Thermodynamics An Engineering Approach
ISBN: 978-0073398174
8th edition
Authors: Yunus A. Cengel, Michael A. Boles
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