New immiscible refrigeration lubricant for HFCs

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:215711

Sunami, Motoshi ^[1]; Takigawa, Katsuya; Suda, Satoshi; Sasaki, Umekichi ^[2]

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1. Nippon Oil Co. Ltd., Tokyo (Japan). Lubricant Marketing and Product Engineering Dept.
2. Nippon Oil Co. Ltd., Yokohama (Japan). Central Technical Research Lab.

This study examines the capability of a family of very low-viscosity alkylbenzenes (AB) used in high-side rotary compressors for HFCs. In the development of refrigeration lubricants for HFCs, miscibility is one of the most important problems to be solved. Therefore, PAG (polyalkylene glycols) and POE (polyol esters), which have good miscibility, have been applied in new HFC applications. However, it is difficult for these lubricants to maintain long-term durability in high-side rotary compressors. In friction tests under high HFC pressure, ABs with much lower viscosities than mineral oil maintained a much stronger oil film than the combination of mineral oil/R-12 or POE/HFCs. These results were also proven by compressor durability tests. From the study of the solubility of ABs and HFCs, it is suggested that the total amount of refrigerant can be reduced because HFCs are barely soluble with ABs inside the high-side shell.

• OSTI ID: 215711
• Report Number(s): CONF-950624--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CHLOROFLUOROCARBONS
COMPATIBILITY
DISSOLUTION
EXPERIMENTAL DATA
IMPURITIES
LUBRICANTS
MATERIAL SUBSTITUTION
REFRIGERANTS
REFRIGERATING MACHINERY
STABILITY
TRIBOLOGY
VISCOSITY