Nontoxic Heat Transport Fluids for Spacecraft Two-Phase Thermal Control Systems

摘要

The report summarizes an investigation to determine the availability of a nontoxic, nonflammable, noncorrosive and thermally stable heat transport fluid suitable for two-phase thermal control systems in manned spacecraft. Approximately 860 chemical substances were sorted and ranked according to parameters that were defined and calculated to quantitatively evaluate fluids for the proposed application. A methodology was developed for the evaluation and ranking. A survey of world suppliers of heat transport fluids was also conducted to determine whether a suitable fluid is available. The investigation did not identify a fluid that can meet all the environmental and thermal property requirements required for safe and efficient performance in the spacecraft application.