1993-07-01

Evaluation of Space Station ATCS Evolution Growth Paths 932153

This paper determines the feasibility of potential Active Thermal Control System (ATCS) growth paths by assessing thermal, integration, and implementation impacts. TRASYS/IRTRAN models were used to evaluate the effects of increased radiator temperature, increased radiator area, and radiator wing addition on Space Station Freedom (SSF) elements, including energy reflected back to the ATCS. SINDA/FLUINT models were used to determine the heat rejection capability of an ATCS loop with an integrated heat pump that operates with Electrical Power System (EPS) peak power. The effects of upgrading the ATCS by advanced technology ORU implementation during maintenance replacements was also evaluated. The study results presented lead to conclusions on which paths are best suited for different growth scenarios.

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