This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Assessment of Lithium Hydroxide Conservation Via International Space Station Control of Orbiter Carbon Dioxide
Technical Paper
2002-01-2271
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In order to conserve mass and volume, it was proposed that the International Space Station (ISS) control the level of carbon dioxide (CO2) in the Space Shuttle Orbiter while the Orbiter is docked to the ISS. If successful, this would greatly reduce the number of lithium hydroxide (LiOH) canisters required for each ISS-related Orbiter mission.
Because of the impact on the Orbiter Environmental Control and Life Support Subsystem (ECLSS), as well as on the Orbiter flight manifest, a Space Shuttle Program (SSP) analysis was necessary.
STS-108 (ISS UF1) pre-flight analysis using the Personal Computer Thermal Analyzer Program (PCTAP) predicted that the ISS would be able to control the level of CO2 in the Orbiter (and throughout the stack) under nominal conditions with no supplemental LiOH required. This analysis assumed that the Carbon Dioxide Removal Assembly (CDRA) located in the U.S. Lab would be operating in its off-nominal “single bed” mode, and that the Vozdukh CO2 removal system located in the Service Module would be in its highest performance mode of operation.
Post-flight analysis was also conducted in order to fine-tune and expand the pre-flight analysis.
This paper will assess the assumptions and predictions of the PCTAP analysis, explain any discrepancies between the analysis and flight data, provide suggestions for improvement of the analysis, make predictions for future flights based on changes in Environmental Control and Life Support (ECLS) hardware performance or system configuration, and suggest performance improvements for future missions.
Authors
Citation
Dunaway, B., "Assessment of Lithium Hydroxide Conservation Via International Space Station Control of Orbiter Carbon Dioxide," SAE Technical Paper 2002-01-2271, 2002, https://doi.org/10.4271/2002-01-2271.Also In
References
- Kanon, Eric C. Rockwell International Personal Computer Thermal Analyzer Program October 1996
- Martin Marietta Company Thermal Radiation Analyzer System (TRASYS) June 1983
- Martin Marietta Company Systems Improved Numerical Differencing Analyzer (SINDA) March 1990
- Dunaway, Brian R. Rockwell International Employing TRASYS Database for PC Model 2 June 1995
- Dunaway, Brian R. Boeing Edeen, Marybeth NASA JSC Orbiter Capability for Providing Water to the International Space Station according to the Most Probable Flight Attitudes International Conference on Environmental Systems Toulouse, France July 2000
- Knox, James C. NASA MSFC International Space Station Carbon Dioxide Removal Assembly Testing International Conference on Environmental Systems Toulouse, France July 2000
- Thacker, Karen The Boeing Company ECLSS/Active Thermal Control, Houston STS-108 ECLSS/Payload Thermal Compatibility Verification Analysis October 2001
- “Best Guess CO2 Control Performance for STS-108 DTO,” 20 Nov 2001
- 2
- Dunaway, Brian R. Boeing Study Regarding Crewmember Water Vapor Generation Rates International Conference on Environmental Systems Orlando, Florida July 2001