The Integrated Sublimator Driven Coldplate (ISDC) is a novel thermal control device that combines the functions of a flow-through coldplate and a sublimator while maintaining integration with a pumped fluid loop. This is in contrast to a Sublimator Driven Coldplate (SDC) which is not integrated with the fluid loop. The advantage of the ISDC is the consolidation of conventional hardware that perform singular functions into one capable of operating in multiple modes simplifying overall architecture, increasing failure tolerance, and providing system mass savings. Since the concept can transport heat via a pumped loop or remove heat via sublimation, consumables are minimized. A short duration staged vehicle would see the greatest benefit of implementing an ISDC in an Active Thermal Control System (ATCS). An Engineering Development Unit (EDU) has been designed, manufactured, and tested in Paragon’s ECLSS Human-rating Facility (EHF) to verify anticipated operation in all modes and validate analytical models used to predict thermal performance. The ISDC EDU has top and bottom mounting surfaces totaling roughly 0.5 m2 and is nominally designed for heat rejection of 1550 W including 1250 W from avionics mounted directly to it. The design is intended to be easily scalable to other sizes and heat loads as architectural requirements dictate. This paper discusses the results of ISDC EDU testing and correlation of those results to analytical predictions. The validated analytical model can be used to aid in the design of ISDC solutions to any number of anticipated system architectures.
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