Optimización del rendimiento del refrigerador doméstico con lubricantes variados para el refrigerante R134a : un análisis comparativo

Muhammad Ehtesham ul Haque; Abdul Samad Khan; Adeel Ahmed Khan; Muhammad Anus Irshad

doi:10.36561/ING.29.9

Authors

Muhammad Ehtesham ul Haque NED University of Engineering & Technology, Pakistan https://orcid.org/0000-0001-8751-348X
Abdul Samad Khan NED University of Engineering & Technology, Pakistan https://orcid.org/0009-0005-5449-635X
Adeel Ahmed Khan NED University of Engineering & Technology, Pakistan https://orcid.org/0009-0004-6790-8176
Muhammad Anus Irshad NED University of Engineering & Technology, Pakistan https://orcid.org/0009-0006-8193-4287

DOI:

https://doi.org/10.36561/ING.29.9

Keywords:

Lubricants, Polyol ester oil, Mineral oil, R-134a, EES, Domestic refrigerator

Abstract

The efficiency and performance of domestic refrigerators don’t only depend on refrigerant but also on lubricating oil used in the refrigerator compressor. The lubricant of the compressor is responsible for the absorption of heat energy evolved during the compressor work. The primary objective of this study is to examine and compare the effects of two distinct lubricating oils utilized with the refrigerant R134a on various performance metrics of the domestic refrigerator compressor, including evaporator capacity, compressor power consumption, and the coefficient of performance (COP) of the refrigerator. These performance parameters were compared for two different cases, viz., domestic refrigerator having R134a as a refrigerant with Mineral oil (MO) and Polyol ester oil (POE), and for two different methods such as manually by using R134a ph chart and EES software. The tests were conducted on a 329-liter refrigerating capacity double-door refrigerator. The effect of changing oil from MO to POE resulted in the increment of evaporator capacity from 1.81 kW to 1.99 kW and COP from 4.9 to 5.7 while the compressor power consumption reduced from 370 watts to 340 watts which concluded that POE oil is the better lubricant in the domestic compressor as compared to MO.

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