NDLI: Alternatives to ozone depleting refrigerants in test equipment

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Alternatives to ozone depleting refrigerants in test equipment

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hall, Richard L. Johnson, Madeleine R.
Copyright Year	1995
Description	This paper describes the initial results of a refrigerant retrofit project at the Aerospace Guidance and Metrology Center (AGMC) at Newark Air Force Base, Ohio. The objective is to convert selected types of test equipment to properly operate on hydrofluorocarbon (HFC) alternative refrigerants, having no ozone depleting potential, without compromising system reliability or durability. This paper discusses the primary technical issues and summarizes the test results for 17 different types of test equipment: ten environmental chambers, two ultralow temperature freezers, two coolant recirculators, one temperature control unit, one vapor degreaser, and one refrigerant recovery system. The postconversion performance test results have been very encouraging: system capacity and input power remained virtually unchanged. In some cases, the minimum operating temperature increased by a few degrees as a result of the conversion, but never beyond AGMC's functional requirements.
File Size	408076
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19950025346
Archival Resource Key	ark:/13960/t1fj7d05n
Language	English
Publisher Date	1995-03-01
Access Restriction	Open
Subject Keyword	Nonmetallic Materials Performance Tests Aircraft Maintenance Ozone Depletion Inertial Navigation Control Equipment Coolants Aircraft Equipment Environment Protection Alternatives Refrigerants Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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