Concepts for a Capillary-Pumped Heat Engine

Statistics – Applications

Scientific paper

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Heat Engines, Heat Pumps, Heat Pipes

Scientific paper

A scoping thermal analysis was done to generally investigate the thermal-hydraulic feasibility of capillary pumped heat engines. The analysis was motivated by recent advances in nano-scale materials science that have made it increasingly practical to manufacture high porosity wicks with a median pore diameter on the order of a few nanometers. Capillary-pumped heat engines (CPHE) are proposed to operate constructively like a Rankine cycle and to be generally feasible for wick evaporation rates equivalent to about 1 watt per square centimeter assuming wick material thermal conductivity coefficient on the order of a few W/m-K. Novel architecture for a radioisotope driven CPHE is discussed.

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