The effect of oil in refrigeration: Current research issues and critical review of thermodynamic aspects

Youbi-Idrissi, M.; Bonjour, Jocelyn

doi:10.1016/j.ijrefrig.2007.09.006

Cited by 87 publications

(31 citation statements)

References 58 publications

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“…In the case of a refrigerator, the lubricant used in the compressor is mixed with the refrigerant and travels through the refrigerating circuit. As compared to POE oil, which acts as an insulator in the refrigerant circuit and hinders the heat transfer, the high thermal conductivity of the nanolubricant facilitates more effective heat transfer, and therefore increases the speed of reducing the cooling load temperature [38]. Freezing capacity is a standard test for refrigerators [39].…”

Section: Resultsmentioning

confidence: 99%

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Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

Haque¹,

Bakar²,

Kadirgama³

et al. 2016

J. Mech, Eng, Sci.

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The performance of a domestic refrigerator with the addition of nanoparticles in the lubricant was experimentally investigated. Different sizes of nanoparticles of Al2O3 and TiO2 were added to the polyolester (POE) oil in two different volume concentrations (0.05 and 0.1 vol.%). Energy consumption tests and freeze capacity tests were then performed on the refrigerator. The investigation results showed that the refrigerator worked normally and safely with the nanolubricants. The results of the experiments indicated that the refrigerator performed better with nanolubricants as compared to pure POE oil. The COP of the systems was increased by 19% and 22% when 0.05% and 0.1% Al2O3 nanoparticles were added to the POE oil respectively. The system with 0.1% volume concentration of Al2O3 and TiO2 nanoparticles added to the POE oil consumed 27.73% and 14.19% less energy as compared to the pure POE oil system. Hence, this study showed that the addition of nanoparticles in the lubricant oil of the refrigerator is practical and it enhanced the performance of the refrigerator

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Section: Resultsmentioning

confidence: 99%

“…In Figure 6(b), the freezing capacity of 0.05% of Al2O3 is 60% less than the pure POE oil system. This improvement is due to the presence of nanoparticles in the refrigerating circuit [38]. The lubricating oil of the compressor travels with the refrigerant into the entire refrigerant circuit.…”

Section: Resultsmentioning

confidence: 99%

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

Haque¹,

Bakar²,

Kadirgama³

et al. 2016

J. Mech, Eng, Sci.

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“… bulk liquid;  aerosol;  vapour [2]. The amount of oil (concentration) in air is presented in ISO 8573 [5].…”

Section: The Presence Of Lubricant In Refrigeration Cyclementioning

confidence: 99%

“…Contaminants in refrigeration system influence thermodynamic parameters of the refrigerant. These parameters influence the effectiveness of heat exchange in the heat exchanger and the work of compressor and the throttling valve (expansion valve) [1,2].…”

Section: Introductionmentioning

confidence: 99%

Presence of Contaminants in Refrigerant and Their Effect on Refrigeration Cycle

Skrzyniowska¹

2014

JEPE

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Refrigerant is a medium used in refrigeration cycle. Until now in thermodynamic models calculations of refrigerant is not considered with lubricant and moist air but as an ideal pure gas (without any contaminants). This is also the case in refrigeration cycle where the refrigerant is very often considered as an ideal one. Lubricant, air and water vapour are not considered in thermodynamic calculations in spite of their existence. The problems in the existing research are summarized. A further study is suggested on refrigerant systems. This circulation of such calculations is at the origin of a deviation from a theoretical behaviour. This article aims at reviewing the researches of oil-refrigerant, air-refrigerant, moist air-refrigerant or oil-moist air-refrigerant mixtures and focuses particularly on mixture enthalpy calculation. This paper deals with the description of the real mixture of refrigerant and contaminants (lubricant, water, moist air and other remains of refrigerants at elevated pressures and temperatures) which flow in a refrigerating cycle and the main point of this paper is to appoint thermodynamic parameters of such a mixture using the thermodynamic formulas.

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“…To our knowledge, only a few papers are available in the literature which have considered caloric properties of the RWF and evaluated the effect of admixtures on the efficiency of the compressor system (Meltser, 1969;Hughes et al, 1982;Hewitt et al, 1996;Corr et al, 1996;Medvedev et al, 2004;Youbi-Idrissi et al, 2003Zhelezny, 2002;Zhelezny et al, 2004Zhelezny et al, , 2007aLottin et al, 2003), and the heat transfer (Zü rcher et al, 1998a,b;Kedzierski, 2001Kedzierski, , 2003. A very good review on this phenomenon has been recently published by Youbi-Idrissi and Bonjour (2008).…”

Section: Introductionmentioning

confidence: 99%

Influence of compressor oil admixtures on theoretical efficiency of a compressor system

Zhelezny

Nichenko

Semenyuk

et al. 2009

International Journal of Refrigeration

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The effect of oil in refrigeration: Current research issues and critical review of thermodynamic aspects

Cited by 87 publications

References 58 publications

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

Presence of Contaminants in Refrigerant and Their Effect on Refrigeration Cycle

Influence of compressor oil admixtures on theoretical efficiency of a compressor system

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