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TECHNICAL PAPERS

Experimental Studies on a Heat Pump Operating With R22, R407C and R407A: Comparison From an Exergy Point of View

[+] Author and Article Information
B. Rakhesh, G. Venkatarathnam, S. Srinivasa Murthy

Refrigeration and Airconditioning Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600 036 (India)

J. Energy Resour. Technol 125(2), 101-112 (Jun 04, 2003) (12 pages) doi:10.1115/1.1538631 History: Received February 01, 2002; Revised October 01, 2002; Online June 04, 2003
Copyright © 2003 by ASME
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References

Figures

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Different cases of heat exchange
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Schematic view of the test stand
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Variation of overall COP (heating + cooling) with condensing and evaporating temperature
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Variation of heating capacity with condensing and evaporating temperature
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Variation of cooling capacity with condensing and evaporating temperature
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Variation of compressor isentropic efficiency with condensing and evaporating temperature
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Variation of compressor volumetric efficiency with condensing and evaporating temperature
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Variation of internal exergy efficiency of the cycle (refrigerant side alone) with condensing and evaporating temperature
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Variation of external exergy efficiency of the cycle (refrigerant side as well as water side) with condensing and evaporating temperature
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Variation of the exergy efficiency of the compressor with condensing and evaporating temperature
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Variation of exergy efficiency of the condenser with different fluids
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Variation of exergy efficiency of the evaporator with different fluids
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Distribution of exergy losses (external cycle) for different fluids at an evaporating temperature of 0\degree C
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Improvement that can be obtained in the external exergy efficiency of the cycle (refrigerant side as well as water side) when the compressor exergy efficiency is same as that for R22
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Improvement that can be obtained in the internal exergy efficiency of the cycle (refrigerant side only) when the compressor exergy efficiency is same as that for R22

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