SYMPOSIA PAPER Published: 01 January 1997

The Effect of Refrigerants in the Mixed Lubrication Regime


Because of environmental concerns, CFC (chlorofluorocarbon) refrigerants must be replaced with HFCs (hydrofluorocarbons.) As a result, many tribological problems are caused especially in rotary piston compressors. To solve the problem, the effects of refrigerants on friction and wear characteristics of the oil and refrigerant mixtures at the mixed lubrication regime are investigated. The difference in refrigerants are clearly observed not only in boundary but also in the mixed lubrication regime. The effects of operating conditions on sliding conditions and experimental results are also discussed. It is concluded that for practical application where long life is essential, experiments must be conducted under the mixed lubrication regime. Also, the importance of defining the lubrication regime in terms of film parameter is emphasized.

Author Information

Mizuhara, K
Mechanical Engineering Laboratory, Tsukuba, Japan
Tomimoto, M
Hoya Corporation, Kitaoka, Japan
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Developed by Committee: D02
Pages: 38–48
DOI: 10.1520/STP11834S
ISBN-EB: 978-0-8031-5366-0
ISBN-13: 978-0-8031-2422-6