Thermal Management System for Lunar Ice Miners

The millions of tons of water ice is considered to be the most important resource on the moon. Harvesting water ice from lunar regolith requires a dedicated thermal management system (TMS) since (1) it requires very high thermal energy input to sublimate ice into vapor (i.e., volatile) and (2) capturing these volatile in the near-vacuum environment also needs significant cooling capacity. Advanced Cooling Technologies, Inc (ACT) in collaboration with Honeybee Robotics (HBR) is developing a well-engineered TMS for Lunar ice mining vehicles that are powered by MMRTG. The TMS can strategically and directly use the waste heat of nuclear power sources to extract water vapor from icy-soil on the moon and use cold environmental temperature as the heat sink to collect volatile within a cold trap container. This will enable ice harvesting with optimized consumption of electricity. In Phase I, ACT successfully developed and demonstrated two key thermal features of the proposed TMS. They are:A coring drill that can directly use waste heat for ice extractionA cold trap container that can switch operation modes without using any moving parts and electricitynbsp;A preliminary full-scale TMS for a mining vehicle that can potentially meet NASAlsquo;s requirements was designed and analyzed. In Phase II, ACT/HBR team will further mature the proposed TMS for Lunar Ice Miners. The efforts include optimization of all thermal components and development and validation of a numerical model to simulate the ice mining operation in relevant environmental conditions. An end-to-end demonstration system will be set-up and tested in a Lunar environmental chamber. A detailed design of full-scale TMS with optimized SWaP will be developed and reported by the end of the Phase II program.