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Effects of Varying Environmental Parameters on Trace Contaminant Concentrations in the NASA Space Station Reference Configuration
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Abstract
The effects of varying carbon dioxide (CO2) and oxygen (O2) concentrations, relative humidity, temperature, and pressure on the production and depletion of trace contaminants in the NASA Space Station Reference Configuration have been evaluated. This evaluation was conducted using a Space Station trace contaminant computer model developed specifically to predict the effects of chemical reactions and physical processes on gaseous trace contaminant concentrations as functions of time. The sensitivity of trace contaminant concentrations to changing CO2 and O2 concentrations, relative humidity, temperature, and pressure was determined. In addition, the effects of changing the initial concentrations of significant contaminants such as nonmethane hydrocarbons and nitrogen oxides on concentrations of other trace contaminants of importance were examined. Changing the initial concentrations of nonmethane hydrocarbons and nitrogen oxides produced more significant changes in the concentration levels of trace contaminants than did pressure and humidity variations. Oxygen and carbon dioxide changes had negligible effects on trace contaminant concentrations. Results which include implications of the analysis on the design of the Space Station trace contaminant control systems are presented.
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Brewer, D. and Hall, J., "Effects of Varying Environmental Parameters on Trace Contaminant Concentrations in the NASA Space Station Reference Configuration," SAE Technical Paper 860916, 1986, https://doi.org/10.4271/860916.Also In
References
- Systems Engineering and Integration Space Station Program Office Space Station Reference Configuration Description NASA Johnson Space Center Rept. No. JSC-19989 Houston, Texas August 1984
- Office of Space Transportation Systems Flammability, Odor, and Offgassing Requirements and Test Procedures for Materials in Environments that Support Combustion NASA Rept. No. NHB 8060.1B National Aeronautics and Space Administration 1981
- Brewer, Dana A. Hall, John B., Jr. A Simulation Model for the Analysis of Space Station Gas-Phase Trace Contaminants Acta Astronautica 1986
- Brewer, D. A. Ogliaruso, M. A. Augustsson, T. R. Levine, J. S. The Oxidation of Isoprene in the Troposphere: Mechanism and Model Calculations Atm. Environ. 18 2723 2744 1984
- Greenberg, J. R. Zimmerman, P. R. Ambient Hydrocarbon Measurements from Tropical Areas Paper presented at 2nd Symposium on the Composition of the Nonurban Troposphere Amer. Meteor. Soc. Williamsburg, VA. 1982
- Logan, J. A. Prather, H. J. Wofsy, S. C. McElroy, M. B. Tropospheric Chemistry: A Global Perspective J. Geophys. Res. 86 7210 7254 1981
- Huebert, B. J. Lazrus, A. L. Tropospheric Gas-Phase and Particulate Nitrate Measurements J. Geophys. Res. 85 7322 7328 1980
- Thompson, A. M. Cicerone, R. J. Clouds and Wet Removal as Causes of Variability in the Trace-Gas Composition of the Marine Troposphere J. Geophys. Res. 87 8811 8826 1982
- Kerwin, J.P. Temporarily Assigned Spacecraft Maximum Allowable Concentration (SMAC) Limits of Atmospheric Contaminants for Missions Up to Ten Days NASA Johnson Space Center Houston, TX. 1985
- Frederick, P. W. Spacelab 1 Aggregate Assessment Addendum NASA Marshall Space Flight Center, Marshall Space Flight Center AL. Nov. 3 1983
- Brewer, D. A. Augustsson, T. R. Levine, J. S. The Photochemistry of Anthropogenic Nonmethane Hydrocarbons in the Troposphere J. Geophys. Res. 88 C11 6683 6695 1983
- Logan, J. A. Nitrogen Oxides in the Troposphere: Global and Regional Budgets J. Geophys. Res. 88 C15 10785 10807 1983