Abstract
The stability and durability of POE refrigeration lubes are discussed. Hydrolytic
stability tests by the autoclave method were conducted at different temperatures with
hydrolytically stable POE (HSPOE, fully branched POE). The life of the HSPOE was estimated
from the Arrhenius plot. An oiliness agent was selected as an antiwear additive from antiwear
tests on a tribometer and from compressor durability tests with high side rotary compressors. In
addition to lubricity, insulation properties in hermetic motors are also needed for refrigeration
lubes for hermetic compressors. The volume resistivity and relative permittivity of the mixture
of POE and HFCs were measured, and it was confirmed that the mixture had insulation
properties equivalent to those of a mixture of mineral oil and HCFC-22. It was shown that the
moisture was effective for the resistivity of POE and HFC mixture.
The stability and durability of POE refrigeration lubes are discussed. Hydrolytic
stability tests by the autoclave method were conducted at different temperatures with
hydrolytically stable POE (HSPOE, fully branched POE). The life of the HSPOE was estimated
from the Arrhenius plot. An oiliness agent was selected as an antiwear additive from antiwear
tests on a tribometer and from compressor durability tests with high side rotary compressors. In
addition to lubricity, insulation properties in hermetic motors are also needed for refrigeration
lubes for hermetic compressors. The volume resistivity and relative permittivity of the mixture
of POE and HFCs were measured, and it was confirmed that the mixture had insulation
properties equivalent to those of a mixture of mineral oil and HCFC-22. It was shown that the
moisture was effective for the resistivity of POE and HFC mixture.
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ReplyDeleteAs the demand for more sustainable refrigeration options grows, R407c refrigerant has emerged as a popular choice due to its lower environmental impact compared to some older refrigerants.
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