THERMAL SCIENCE

International Scientific Journal

Raghavan Vijayan

,

Pss Srinivasan

EXPERIMENTAL EVALUATION OF INTERNAL HEAT EXCHANGER INFLUENCE ON R-22 WINDOW AIR CONDITIONER RETROFITTED WITH R-407C

ABSTRACT
The performance of one ton of refrigeration window air conditioner working with R-22 and retrofitted with eco friendly alternative refrigerant R-407C is experimentally investigated An internal heat exchanger is also added to the same air conditioner to provide liquid overfeeding operation. When retrofitting the R-22 system with R-407C, the coefficient of performance is found to drop by 7.28%, however when internal heat exchanger is included the performance is improved. It is observed that the inclusion of internal heat exchanger has increased the coefficient of performance by 5.86% when running on R-22 and 6.18% when running on R-407C, under the given conditions.
KEYWORDS
window air conditioner, internal heat exchanger, R-407C
PAPER SUBMITTED: 2008-05-23
PAPER REVISED: 2008-09-09
PAPER ACCEPTED: 2008-10-01
DOI REFERENCE: https://doi.org/10.2298/TSCI1001039V
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2010, VOLUME 14, ISSUE No. 1, PAGES [39 - 47]
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Experimental evaluation of internal heat exchanger influence on R-22 window air conditioner retrofitted with R-407C

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