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A Cooling System for the EAPU Shuttle UpgradeThe Shuttle orbiter currently uses hydrazine-powered APU's for powering its hydraulic system pumps. To enhance vehicle safety and reliability, NASA is pursuing an APU upgrade where the hydrazine powered turbine is replaced by an electric motor pump and battery power supply. This EAPU (Electric APU) upgrade presents several thermal control challenges most notably the new requirement for moderate temperature control of high-power electron ics at 132 of (55.6 C). This paper describes how the existing Water Spray Boiler (WSB), which currently cools the hydraulic fluid and APU lubrication oil, is being modified to provide EAPU thermal management.
Document ID
20100033396
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Tongue, Stephen (Hamilton Sundstrand Space Systems International, Inc. United States)
Guyette, Greg (Hamilton Sundstrand Space Systems International, Inc. United States)
Irbeck, Bradley (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 25, 2013
Publication Date
July 9, 2001
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
JSC-CN-6820
Report Number: JSC-CN-6820
Meeting Information
Meeting: 31st International Conference on Environmental Systems
Location: Orlando, FL
Country: United States
Start Date: July 9, 2001
End Date: July 12, 2001
Sponsors: Society of Automotive Engineers, Inc.
Distribution Limits
Public
Copyright
Other

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