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Electrical power generation subsystem for Space Shuttle Orbiter

M. F. Blaski, Skip Owens

Abstract

The requirements, capabilities, and design of the Space Shuttle Orbiter electrical power generation (EPG) subsystem are presented. The Orbiter EPG subsystem is designed to have the flexibility to supply the basic Orbiter electrical loads and the power requirements of the payloads which, in some cases, are completely dependent on the Orbiter for both power and heat rejection. These needs are supplied by three hydrogen/oxygen fuel cell powerplants (FCPs), having the capability of providing a total of 14 kW average and up to 24 kW peak in the basic Orbiter configuration. Kits permit dedication of one FCP to the payload by providing an additional reactant tank pair for a seven-day mission and additional heat rejection capability.

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Key concepts: Orbiter, Space Shuttle, Payload (computing), Aerospace engineering, Power (physics), Flexibility (engineering), Electric power, Environmental science