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Impact of Shuttle Orbiter Booster Fan Bypass on Integrated Environmental Control and Life Support Systems
Technical Paper
2006-01-2049
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In order to extend the Shuttle Orbiter's capability to remain docked to the International Space Station (ISS), a plan was developed that would conserve key consumables, most notably cryogenic oxygen which is used by the Orbiter Fuel Cells (FCs) to produce power. A significant part of the power reduction plan is to eliminate the use of the Orbiter's Booster Fan.
To accomplish air exchange between the ISS and Orbiter, a series of fans are used which include the ISS U.S. Lab (USL)/Pressurized Mating Adaptor (PMA) Intermodule Ventilation (IMV) Fan, the Orbiter Booster Fan, and a portion of the capability provided by the Orbiter Cabin Fan. The elimination of the Booster Fan from the series was predicted to reduce the air exchange significantly, but to not cause any adverse Environmental Control and Life Support (ECLS) conditions in either the Orbiter or ISS.
This reduction in air exchange affects the ability of the ISS to control Orbiter and ISS carbon dioxide, as well as affecting the relative contributions of the Orbiter and ISS in controlling humidity. The latter affects the ability of the ISS to manage condensate water. Because the Russians do not process condensate from the USL, the air exchange reduction could affect ISS planning and water balances.
A Station Development Test Objective (SDTO) was performed on STS-114 to determine if the Booster Fan could be successfully bypassed while maintaining an adequate Orbiter/ISS air exchange rate, and to determine the impact on carbon dioxide and humidity control. Flight data obtained from STS-114 was analyzed to determine how these impacts will affect future Orbiter/ISS missions.
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Citation
Dunaway, B. and Cudd, D., "Impact of Shuttle Orbiter Booster Fan Bypass on Integrated Environmental Control and Life Support Systems," SAE Technical Paper 2006-01-2049, 2006, https://doi.org/10.4271/2006-01-2049.Also In
References
- Dunaway, Brian R. The Boeing Company Houston, Texas Impact of No Booster Fan on Docked Operations 17 October 2002
- DiStefano, Frank J. III The Boeing Company Houston, Texas The Personal Computer Transport Analyzer Program September 2003
- Cudd, Douglas M. The Boeing Company Houston, Texas STS-114 L-1 ECLSS/Payload Thermal Compatibility Verification Analysis April 15 2005
- McCloud, Peter L. Dunaway, Brian R. The Boeing Company Graf, John C. Stephenson, Curtis A. NASA Johnson Space Center, EC Houston, Texas Analysis of the Effect of Age on Shuttle Orbiter Lithium Hydroxide Canister Performance 35 th International Conference on Environmental Systems Rome July 2005
- McCloud, Peter L. Dunaway, Brian R. The Boeing Company Houston, Texas Analysis to Characterize Fresh vs. Aged Shuttle Orbiter Lithium Hydroxide Performance 36 th International Conference on Environmental Systems Norfolk, VA July 2006