Thermal stabilities of mixtures of trichlorofluoroethane and lubricating fluids contained in copper sealed tubes

O. Badr, M. Hussein, S.D. Probert and P.W. O'Callaghan

Applied Energy, 1984, vol. 16, issue 1, 52 pages

Abstract: Halocarbons are suitable working fluids in Rankine-cycle engines. However each engine's performance will deteriorate as a result of the thermal breakdown of the working fluid-lubricant mixture. Therefore, for a specified working fluid, the choices of lubricant and lubricant: fluid mixture ratio that will ensure that the mixture is chemically stable at the maximum expected cycle temperature, when in contact with the constructional materials of the engine, are vital. Using trichlorofluoroethane as the working fluid, and operating at a maximum cycle temperature of 140°C, experimental observations revealed that the Clavus mineral lubricating oil, with a lubricant: fluid mixture ratio of up to 10% by weight, in contact with copper, is a good choice.

Date: 1984
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