Lubricant return comparison of naphthenic and polyol ester oils in R-134a household refrigeration applications
Conference
·
OSTI ID:433724
- Witco Corp., Oakland, NJ (United States)
This paper presents mineral oils and polyol esters as possible lubricant options for domestic refrigeration applications employing R-134a as the heat exchange fluid. A performance comparison, based on data presented, is made between the mineral oils and polyol esters evaluated. To more closely examine lubricant return with N-70 and R-134a and ensure that the oil is not contributing to any deterioration in efficiency due to its accumulation in evaporators, a special test unit was designed with a difficult oil return configuration and its performance carefully monitored. Oil return with a hydrofluorocarbon-miscible polyol ester, R-133-O was also evaluated in this setup and its performance results compared to those obtained with the naphthenic refrigeration oil.
- OSTI ID:
- 433724
- Report Number(s):
- CONF-960606--
- Country of Publication:
- United States
- Language:
- English
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