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Pressure-viscosity coefficient of a refrigerant-oil mixture
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
Luleå tekniska universitet.
1993 (English)In: International journal of refrigeration, ISSN 0140-7007, E-ISSN 1879-2081, Vol. 16, no 2, p. 139-142Article in journal (Refereed) Published
Abstract [en]

A coaxial cylinder viscosimeter has been used to determine the pressure-viscosity coefficient of a pure refrigeration oil and of a mixture of refrigerant and oil at gauge pressures up to 15 MPa. The test fluid, Gargoyle Arctic oil 300, is a naphthenic-base oil. The refrigerant was R22, chlorodifluoromethane, which is a commercially important refrigerant. In a gap apparatus the refrigerant-oil mixture has been visually inspected at different pressures. Two different mechanisms are involved in the refrigerant-oil mixture: the change in solubility with pressure and the change in viscosity with refrigerant concentration. If the mixture is pressurized with excess refrigerant available then the concentration of refrigerant will increase with increasing pressure and therefore the viscosity will decrease. If the concentration is kept at a constant level then the viscosity will increase with pressure. The results from the cylinder viscosimeter showed that the viscosity increase with pressure for the mixture was almost the same as for the pure oil

Place, publisher, year, edition, pages
1993. Vol. 16, no 2, p. 139-142
National Category
Other Mechanical Engineering Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Computer Aided Design; Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-9209DOI: 10.1016/0140-7007(93)90070-OISI: A1993KM36300007Scopus ID: 2-s2.0-1842587202Local ID: 7c5582e0-f4ad-11db-ac9f-000ea68e967bOAI: oai:DiVA.org:ltu-9209DiVA, id: diva2:982147
Note
Godkänd; 1993; 20070427 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Isaksson, Ove

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