A Study on Lubricity of Polyolester for Alternative Refrigerant HFC- 134a
نویسندگان
چکیده
This paper presents the experimental research into the evaluation of lubricity for polyolester (POE) lubricant with HFC-134a refrigerant in rotary and reciprocating compressors for household refrigerators. In order to evaluate the lubricity for POE lubricant with HFC-134a refrigerant, we conducted 4-balls wear tests in the mixing environment of POE lubricant and HFC-134a refrigerant. In the present study, the effects of the weight fraction of the refrigerant on the lubricity for POE lubricant with HFC-134a refrigerant were clarified. In addition, wear configuration changes from adhesive wear to corrosive( chemical) wear, as the fraction of refrigerant increases, which is caused by metal fluoride and carboxylic acid salt generated by decomposition of HFC-134a refrigerant and POE lubricant. Also, for the factor by which corrosive (chemical) wear occurred in the high weight fraction of HFC-l34a refrigerant, it was found that the metal fluoride was more dominant than the carboxylic acid salt.
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