Performance Analysis of Water (R718) As a Refrigerant in Medium Range Temperature
Renu Singh1, Alka Bani Agrawal2

1Renu Singh, (M.E. Persuing) U.I.T –RGPV,Bhopal B.E., GEC-REWA Bhopal
2Dr. Alka Bani, (Reader) Department of M. E. U.I.T-RGPV, India.

Manuscript received on July 11, 2013. | Revised Manuscript received on July 15, 2013. | Manuscript published on July 25, 2013. | PP: 86-89 | Volume-1 Issue-9, July 2013. | Retrieval Number: I0396071913/2013©BEIESP

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Abstract: Water as a refrigerant (R718) is compared with itself for sub-cooling and superheating conditions regarding various performance parameters in medium range temperature (50C to 35 0C). These performance parameters i.e. COPs, Pressure ratios , outlet temperature of refrigerants from the compressor and evaporator temperature , are simulated with the help of computer program in language C++ . “ In this paper study of sub-cooling and superheating effect of water(R718) as a refrigerant is compared. In case of superheating evaporator temperature is changed in which throttling valve exit temperature, evaporator temperature, and compressor outlet is kept constant, while condenser temperature varies (5oC to 35oC)”. It is found that for small range of degree of superheat COP is highest, and decreases with increase in degree of superheat. Assuming exactly the same cycle parameters, with increase in degree of sub-cooling, it increases again.
Keywords: Comparison, compressor, cycle, refrigeration, refrigerants, water, sub-cooling, superheating.