Compatibility of refrigerants and lubricants with electrical sheet insulation under retrofit conditions
Abstract
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.
- Authors:
-
- Trane Co., La Crosse, WI (United States)
- Publication Date:
- Research Org.:
- Air-Conditioning and Refrigeration Technology Inst., Inc., Arlington, VA (United States)
- Sponsoring Org.:
- USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
- OSTI Identifier:
- 414066
- Report Number(s):
- DOE/CE/23810-72B; CONF-960709-2
ON: DE96013993
- DOE Contract Number:
- FG02-91CE23810
- Resource Type:
- Conference
- 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
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ELECTRICAL INSULATION; TESTING; REFRIGERANTS; LUBRICANTS; RETROFITTING; REFRIGERATION
Citation Formats
Doerr, R G, and Waite, T D. Compatibility of refrigerants and lubricants with electrical sheet insulation under retrofit conditions. United States: N. p., 1996.
Web.
Doerr, R G, & Waite, T D. Compatibility of refrigerants and lubricants with electrical sheet insulation under retrofit conditions. United States.
Doerr, R G, and Waite, T D. 1996.
"Compatibility of refrigerants and lubricants with electrical sheet insulation under retrofit conditions". United States. https://www.osti.gov/servlets/purl/414066.
@article{osti_414066,
title = {Compatibility of refrigerants and lubricants with electrical sheet insulation under retrofit conditions},
author = {Doerr, R G and Waite, T D},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/414066},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Nov 01 00:00:00 EST 1996},
month = {Fri Nov 01 00:00:00 EST 1996}
}