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Design of an Ammonia Two-Phase Prototype Thermal Bus for Space Station
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Abstract
The feasibility of two-phase heat transport systems for use on Space Station was demonstrated by testing the Thermal Bus Technology Demonstrator (TBTD) as part of the Integrated Two-Phase System Test in NASA-JSCs Thermal Test Bed. Under contract to NASA-JSC, Grumman is currently developing the successor to the TBTD, the Prototype Thermal Bus System (TBS). The TBS design, which uses ammonia as the working fluid, is intended to achieve a higher fidelity level than the TBTD by incorporating both improvements based on TBTD testing and realistic design margins, and by addressing Space Station issues such as redundancy and maintenance. The TBS is currently being fabricated, with testing scheduled for late 1987/early 1988. This paper describes the TBS design which features fully redundant plumbing loops, five evaporators designed to represent different heat acquisition interfaces. 14 condensers which mate with either space radiators or facility heat exchangers, and several modular components.
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Citation
Brown, R., Gustafson, E., and Parish, R., "Design of an Ammonia Two-Phase Prototype Thermal Bus for Space Station," SAE Technical Paper 871506, 1987, https://doi.org/10.4271/871506.Also In
References
- Space Station Prototype Two-Phase Thermal Bus System Contract NAS 9-17479 Grumman Corp. September 1985
- Development of a Prototype Thermal Bus for Large Space Platforms Contract NAS 9-16781 Grumman Aerospace Corporation November 1982
- Alario, J. Brown, R. Otterstedt, P. “Space Constructive Radiator Prototype Test Program,” AIAA Paper No. 84-1793 June 25-28 1984
- Initial Two-Phase System Final Report Rockwell International November 1986
- Ammonia Thermal Bus Technology Demonstrator Ambient Test Quick Look Report Rockwell International January 1987
- Edeistein, F. Liandris, M. Rankin, J. “Thermal Test Results of the Two-Phase Thermal Bus Technology Demonstration Loop,” AIAA Paper No. 87-1627 June 8-10 1987
- Prototype Space Station Space Erectable Radiator System Contract NAS 9-17498 Grumman Corp. 1985
- Schmidt, R. Gustafson, E. “Space Station Active Thermal Control System Modelling,” AIAA Paper No. 87-1468 June 8-10 1987
- Brown, R. Gustafson, E. Long, W. “Design and Test of a Prototype Thermal Bus Evaporator Reservoir Aboard the KC-135 0-g Aircraft” AIAA Paper No. 87-1503 June 8-10 1987