NDLI: Performance comparison of oil and oil less system with changing evaporator shape in domestic refrigerator

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Performance comparison of oil and oil less system with changing evaporator shape in domestic refrigerator

Content Provider	Scilit
Author	Oh, Been Sangkyung, Na Kim, Hyun Choi, Gyungmin
Copyright Year	2019
Description	Journal: Iop Conference Series: Materials Science and Engineering Generally, lubricating oil has the role of reducing the friction of the compressor. However, due to the presence of lubricating oil, the heat transfer performance in the evaporator is decreased and the pressure drop of the pipe in the system is increased. In this paper, performance of the oil absence was experimentally evaluated in the domestic refrigerator with different types of evaporator. The experiments were conducted in oil and oil-less systems. The on-off cyclic test and steady state energy test were performed to analyze the system performance such as power consumption, cooling capacity, coefficient of performance and operating characteristics. The grooved tube evaporator and the plane tube evaporator were also compared to investigate the influence of the lubricating oil with the evaporator tube type. The power consumption of the oil-less system was decreased compare to the oil system. This is because the pressure drop in the capillary tube was decreased and the heat transfer performance from the compressor discharge to the condenser outlet is improved. On the evaporator side, the grooved tube evaporator was improved compared to the plain tube evaporator in all systems. The inner fin on the grooved evaporator caused a larger heat transfer area and heat transfer coefficient of the refrigerant side. The oil that exists between the inner fins of the grooved evaporator influenced decreasing the heat transfer area.
Related Links	https://iopscience.iop.org/article/10.1088/1757-899X/604/1/012039/pdf
ISSN	17578981
e-ISSN	1757899X
DOI	10.1088/1757-899x/604/1/012039
Journal	Iop Conference Series: Materials Science and Engineering
Issue Number	1
Volume Number	604
Language	English
Publisher	IOP Publishing
Publisher Date	2019-08-01
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Materials Science and Engineering
Content Type	Text
Resource Type	Article

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