THERMAL SCIENCE

International Scientific Journal

ASSESSMENT OF R290 AS A POSSIBLE ALTERNATIVE TO R22 IN DIRECT EXPANSION SOLAR ASSISTED HEAT PUMPS

ABSTRACT
In this paper, the energy performance of a direct expansion solar assisted heat pump has been experimentally assessed with R290 as an alternative to R22 to meet the requirements of Kigali agreement. The experiments have been per-formed at Calicut climatic conditions (latitude of 11.15° N, longitude of 75.49° E) during the winter climates of 2016. The performance parameters such as, compressor power consumption, condenser heating capacity, energy perfor-mance ratio, and solar energy input ratio were evaluated for energy perfor-mance comparison. The results showed that, R290 has 6.8% higher energy per-formance ratio when compared to R22, with 11% reduction in compressor pow-er consumption. Moreover, R290 has negligible global warming impact and zero ozone depletion potential when compared to R22. The effect of wind speed, col-lector area, ambient temperature, and solar insolation on the system perfor-mance found to be with an average value of 0.85%, 12%, 2.5%, and 4.5% for the selected refrigerants, respectively.
KEYWORDS
PAPER SUBMITTED: 2017-03-02
PAPER REVISED: 2017-05-30
PAPER ACCEPTED: 2017-06-15
PUBLISHED ONLINE: 2017-12-16
DOI REFERENCE: https://doi.org/10.2298/TSCI17S2369P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE Supplement 2, PAGES [S369 - S378]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, 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