2001-01-2152: A Cooling System for the EAPU Shuttle Upgrade - Technical Paper

Event: 31st International Conference On Environmental Systems

Authors

Hamilton Sundstrand Space Systems international, Inc.

Hamilton Sundstrand Space Systems international, Inc.

Abstract

Content: The 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 electronics at 132 °F (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.

Meta Tags

Topics: Thermal management
Hydraulic fluids
Hydraulic systems
Electric motors
Lubricating oils
Pumps
Batteries
Water
Reliability

Affiliated or Co-Author: Hamilton Sundstrand Space Systems international, Inc.

Details

DOI: https://doi.org/10.4271/2001-01-2152

Citation: Tongue, S., Guyette, G., and Irlbeck, B., "A Cooling System for the EAPU Shuttle Upgrade," 31st International Conference On Environmental Systems, Orlando, Florida, United States, July 9, 2001, https://doi.org/10.4271/2001-01-2152.

Additional Details

Publisher: SAE International

Published: 7/9/2001

Product Code: 2001-01-2152

Content Type: Technical Paper

Language: English