Compatibility of refrigerants and lubricants with motor materials under retrofit conditions
- Trane Co., La Crosse, WI (United States)
Motor materials were exposed to original refrigerants R-11, R-12, R-22 and R-502 in the presence of mineral oil for 500 hours. These same materials were then exposed to alternative refrigerants R-123, R-134a, R-407C (R-32/R-125/R-134a) and R-404A (R-125/R-143a/R-134a), respectively, in the presence of the appropriate lubricant for 500 hours. As a control, some samples were exposed to the original refrigerant/mineral oil for a total of 1,000 hours. These tests were conducted to determine whether exposure to the original refrigerant/mineral oil would affect compatibility of the motor materials with the alternative refrigerant/lubricant after retrofit. Motor materials exposed to the alternative refrigerant and lubricant (after an initial exposure to the original refrigerant and mineral oil) appeared to be compatible with the alternative refrigerant and lubricant. The only concerns were embrittlement of the polyethylene terephthalate (PET) sheet and sleeving insulations, and delamination and blistering of the Nomex sheet insulation in the R-22, R-502, and R-12. Embrittlement of the PET materials was attributed to moisture present during the exposure. Separation of the 475 varnish from metal surfaces in the R-123 was also a concern. The sheet and sleeving insulations were affected by the original refrigerant/mineral oil to a greater extent than by the alternative refrigerant and lubricant.
- Research Organization:
- Air-Conditioning and Refrigeration Technology Inst., Inc., Arlington, VA (United States); Trane Co., La Crosse, WI (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-91CE23810
- OSTI ID:
- 41339
- Report Number(s):
- DOE/CE/23810-51B; ON: DE95010185; TRN: AHC29512%%77
- Resource Relation:
- Other Information: PBD: 12 Jan 1995
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
REFRIGERANTS
COMPATIBILITY
LUBRICANTS
CHLOROFLUOROCARBONS
MATERIAL SUBSTITUTION
MOTORS
PROGRESS REPORT
AIR CONDITIONERS
REFRIGERATING MACHINERY
LUBRICATION
MATERIALS TESTING
ELECTRICAL INSULATORS
DAMAGE
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
EXPERIMENTAL DATA