skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Compatibility of refrigerants and lubricants with electrical sheet insulation under retrofit conditions

Conference ·
OSTI ID:414066
;  [1]
  1. Trane Co., La Crosse, WI (United States)

To determine whether exposure to the original refrigerant/mineral oil would affect compatibility of sheet insulation with alternative refrigerant/lubricant after retrofit, sheet insulation was exposed at elevated temperature to the original refrigerant and mineral oil for 500 hours, followed by exposure to the alternative refrigerant and lubricant for 500 hours. Most of the sheet insulation 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 concern was delamination and blistering of the sheet insulation containing Nomex, especially after removal of absorbed refrigerant at high temperature. This was attributed to incompatibility of the adhesive and not to the Nomex itself. Embrittlement of the polyethylene terephthalate (PET) sheet was initially observed, but 2048 subsequent tests under extremely dry conditions showed that embrittlement of the PET materials was attributed to moisture present during the exposure.

Research Organization:
Air-Conditioning and Refrigeration Technology Inst., Inc., Arlington, VA (United States)
Sponsoring Organization:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
DOE Contract Number:
FG02-91CE23810
OSTI ID:
414066
Report Number(s):
DOE/CE/23810-72B; CONF-960709-2; ON: DE96013993
Resource Relation:
Conference: Purdue international compressor engineering conference, West Lafayette, IN (United States), 21-26 Jul 1996; Other Information: PBD: [1996]
Country of Publication:
United States
Language:
English