THERMAL SCIENCE

International Scientific Journal

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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 Issue 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

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence