Exposure testing of dielectric liquids for aircraft EHD heat exchanger applications

Author

Paschkewitz, John S.

Author_Institution

Transparency & Thermal Syst. Sect., Air Force Res. Lab., Wright-Patterson AFB, OH, USA

Volume

1

fYear

1998

fDate

25-28 Oct 1998

Firstpage

166

Abstract

An eight-week test evaluated long-term exposure effects of pulsed high voltage electric fields on fluid properties. Two electronics cooling fluids suitable for aviation use were tested: FC-72, a perfluorocarbon, and PAO, or polyalphaolefin, a dielectric cooling oil. These fluids were exposed to approximately 10,000 on-off cycles and tested for changes in fluid physical and electrical properties and chemical composition. Test results showed no significant changes in FC-72 properties, but a substantial reduction in the dielectric strength and increase in electrical conductivity of PAO. Further testing is required to isolate the cause of these changes

Keywords

aircraft testing; avionics; cooling; dielectric liquids; electric strength; electrical conductivity; electrohydrodynamics; heat exchangers; FC-72; PAO; aircraft EHD heat exchanger; chemical composition; dielectric cooling oil; dielectric liquid; dielectric strength; electrical conductivity; electronics cooling fluid; exposure testing; perfluorocarbon; polyalphaolefin; pulsed high voltage electric field; Aerospace electronics; Aircraft; Chemicals; Conductivity; Dielectric breakdown; Dielectric liquids; Electronic equipment testing; Electronics cooling; Petroleum; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1998. Annual Report. Conference on

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-5035-9

Type

conf

DOI

10.1109/CEIDP.1998.733904

Filename

733904