This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Impact of Crewmember Schedule on System Performance
Technical Paper
2005-01-2918
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A simple simulation model is built to determine the oxygen, carbon dioxide, and water supplies needed from Earth, as well as their respective storage tank sizes required to sustain crewmembers activities in different scenarios. The scenarios investigated include full supply of oxygen, carbon dioxide, and water from Earth without regenerative technologies, constant re-supply and removal rates from regenerative technologies, and variable re-supply and removal rates from crops. Hourly crewmember schedule is implemented to determine its effect on the storage cost. No specific regenerative technologies are assumed, hence giving the freedom to minimize the storage tank size without technical constraints. Equivalent system mass (ESM) analysis on storage tanks is conducted to investigate the storage cost in all scenarios. ESM is a cost metric used to perform trade study analysis. The components considered in ESM are mass, volume, power, cooling and crew time. In this paper, a 15-year Mars surface mission is selected. Results indicate that crewmember schedule affects the storage tank capacity significantly when the re-supply/removal rate is constant. Crop effect is greater than crewmember schedule when it is introduced into the model. It becomes the driving force on the storage cost. However, when contingency, leakage and technology inefficiency levels are considered, the leakage and technology inefficiency rates of more than 1% have a larger impact on the storage ESM than crops do.
Authors
Topic
Citation
Ang, C., Chiam, T., and Yih, Y., "Impact of Crewmember Schedule on System Performance," SAE Technical Paper 2005-01-2918, 2005, https://doi.org/10.4271/2005-01-2918.Also In
References
- Gourdarzi, S. Ting, K.C. “Top Level Modeling of Crew Component of ALSS” 29 th International Conference on Environmental Systems, Denver, Colorado July 1999 SAE Technical Paper 1999-01-2042
- Finn, C.K. “Dynamic System Modeling of Regenerative Life Support Systems” 29 th International Conference on Environmental Systems, Denver, Colorado July 1999 SAE Technical Paper 1999-01-2040
- Finn, C.K. Meyers, K.E. Duffield, B. “Dynamic Model of the BIO-Plex Air Revitalization System” 31 st International Conference on Environmental Systems, Florida July 2001 SAE Technical Paper 2001-01-2318
- Jones, H. Finn, C.K. Kwauk, X. Blackwell, C. “Modeling Separate and Combined Atmospheres in BIO-Plex” 31 st International Conference on Environmental Systems, Florida July 2001 SAE Technical Paper 2001-01-2361
- Kortenkamp, D. Bell C. “Simulating Advanced Life Support Systems for Integrated Controls Research” 33 rd International Conference on Environmental Systems, Vancouver, BC, Canada July 2003 SAE Technical Paper 2003-01-2546
- Hanford, A.J. Advanced Life Support Baseline Values and Assumptions Document JSC May 2002
- National Research Council Recommended Dietary Allowances (RDA) National Academy Press Washington, D.C. 10th edition 1989
- Lange, K.E. Lin, C.H. Advanced Life Support Program Requirements Definition and Design Considerations JSC December 1996
- Institute of Medicine of the National Academies Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids National Academy Press Washington, D.C. 2002
- Jones, H. Cavazzoni, J. “Top-Level Crop Models for Advanced Life Support Analysis” 30 th International Conference on Environmental Systems, Toulouse, FRANC July 2000 SAE Technical Paper 2000-01-2261
- Hanford, A.J. Ewert, M.K. Advanced Life Support Systems Integration, Modeling, and Analysis Reference Missions Document JSC November 2001
- Jones, H. Cavazzoni, J. Keas, P. “Crop Models for Varying Environmental Conditions” 32 nd International Conference on Environmental Systems, San Antonio, Texas July 2002 SAE Technical Paper 2002-01-2520
- Hanford, A.J. Subsystem Details for the Fiscal Year 2004 Advanced Life Support Research and Technology Development Metric September 2004
- Hanford, A.J. Advanced Life Support Research and Technology Development Metric JSC September 2003
- Drysdale, A. Garton, H. Hasselbrack, S. Barker, R. Thompson, D. Scruggs, B. Fratto, L. “Clothing Systems for Long Duration Space Missions” 34 th International Conference on Environmental Systems, Colorado July 2004 SAE Technical Paper 2004-01-2580 .
- Anderson, M.S., personal communication, 2005