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SAE AIR64 Rev C

Electrical and Electronic Equipment Cooling in Commercial Transports
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SAE AIR64 Rev C

Electrical and Electronic Equipment Cooling in Commercial Transports

PUBLISH DATE 2021
PAGES 23
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This document considers the cooling of equipment installed in equipment centers, which usually consist of rack-mounted equipment and panel mounted equipment in the flight deck. Instances where these two locations result in different requirements are identified. This document generally refers to the cooled equipment as E/E equipment, denoting that both electrical and electronic equipment is considered, or as an E/E equipment line-replaceable-unit (LRU). The majority of cooled equipment takes the form of LRUs. The primary focus of this document is E/E equipment which uses forced air cooling to keep the equipment within acceptable environmental limits. These limits ensure the equipment operates reliably and within acceptable tolerances. Cooling may be supplied internally or externally to the E/E equipment case. Some E/E equipment is cooled solely by natural convection, conduction, and radiation to the surrounding environment. This document discusses specification requirements, system design considerations, component design, and system testing. It also discusses the analysis and test considerations for the thermal design of the avionic equipment. The discussion of supplementary cooling systems includes consideration of a refrigeration system. This document just covers air cooling of equipment. AIR1811 should be consulted for information on liquid cooling of equipment. Although this document is targeted at transport category airplanes, most of the material applies to other classes of aircraft with possible adaptions.
SDO SAE: SAE International
Document Number AIR64
Publication Date Aug. 10, 2021
Language en - English
Page Count 23
Revision Level C
Supercedes
Committee
Publish Date Document Id Type View
Aug. 10, 2021 AIR64C Revision
Sept. 1, 1992 AIR64B Revision
Oct. 1, 1970 AIR64A Revision