THERMAL SCIENCE

International Scientific Journal

Mian Umar Saeed

,

Shafiq R. Qureshi

,

Khurram J. Hashmi

,

Muhammad Ali Khan

,

Syed N. Danish

PERFORMANCE ASSESSMENT OF ALTERNATE REFRIGERANTS FOR RETROFITTING R22 BASED AIR CONDITIONING SYSTEM

ABSTRACT
The performance of zero Ozone Depletion Potential (ODP) refrigerants is investigated when retrofitted in R22 based air conditioning system. The options evaluated are R407C, R417A, R422D, R427A and R438A. In order to arrive at most suitable alternative/s to R22, energy and exergy performance of candidate refrigerants is carried out and compared against that of R22. The COPs and exergy efficiencies showed that none of selected refrigerant is as efficient as R22 however their values suggests that each may be considered as potential substitute for retrofitting. Having comparable COP to others but low cooling capacity of R417A makes it less attractive. With comparatively reduced COP, lowest exergy efficiency and highest mass flow rate, makes R422D the least desirable option. R407C, R427A and R438A emerged as most attractive substitutes. The lower discharge temperatures of substitutes will enhance the compressor life. Further, for substitutes there may be a possible change out of expansion valve.
KEYWORDS
ODP, alternative, COP, exergy efficiency
PAPER SUBMITTED: 2016-08-11
PAPER REVISED: 2016-11-28
PAPER ACCEPTED: 2016-12-03
PUBLISHED ONLINE: 2017-01-14
DOI REFERENCE: https://doi.org/10.2298/TSCI160811315S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 2, PAGES [931 - 941]
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Performance assessment of alternate refrigerants for retrofitting R22 based air conditioning system

© 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