THERMAL SCIENCE

International Scientific Journal

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Mehmet Das

,

Oguzhan Pektezel

EXPERIMENTAL AND NUMERICAL COMPARISON OF THERMODYNAMIC PERFORMANCES OF NEW AND OLD GENERATION REFRIGERANTS IN THE SAME COOLING SYSTEM

ABSTRACT
The use of new generation low GWP refrigerants in cooling systems is becoming increasingly common due to thermal performance and less environmental impact. In this study, the thermal performance of the new generation R290 refrigerant and the old generation R404A refrigerant in the same cooling system were investigated experimentally and numerically. The thermal performance values of both gases were compared, provided that the temperature of the cold room cooled by the vapor compression cooling system drops to 0°C. –5°C, 0°C, 5°C evaporator temperatures and 25°C, 30 °C, 35 °C condenser temperatures were used as operating parameters. The experimental results revealed that the highest COP values in the system for R290 and R404A were 4.68 and 3.94, respectively. An average of 9.38% increase in cooling capacity was detected with R290 compared to R404A refrigerant. In the numerical analysis part of the study, the evaporator surface temperature and air velocity distributions of both refrigerants in the cold room were shown numerically by using ANSYS FLUENT 19.1. As a result of the study, it was stated that R290 had higher thermal performance than R404A, according to both experimental and numerical analysis results.
KEYWORDS
Cold room, R290, thermal performance, COP, CFD analysis
PAPER SUBMITTED: 2022-02-05
PAPER REVISED: 2022-03-17
PAPER ACCEPTED: 2022-03-21
PUBLISHED ONLINE: 2022-05-22
DOI REFERENCE: https://doi.org/10.2298/TSCI220205069D
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 6, PAGES [4841 - 4854]
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Experimental and numerical comparison of thermodynamic performances of new and old generation refrigerants in the same cooling 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