Regolith thermal energy storage for lunar nighttime power

Computer Science

Scientific paper

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Electric Power Supplies, Energy Storage, Lunar Bases, Regolith, Thermal Energy, Fuel Cells, Gas Bags, Heat Exchangers, Night, Thermal Conductivity

Scientific paper

A scheme for providing nighttime electric power to a lunar base is described. This scheme stores thermal energy in a pile of regolith. Any such scheme must somehow improve on the poor thermal conductivity of lunar regolith in vacuum. Two previous schemes accomplish this by casting or melting the regolith. The scheme described here wraps the regolith in a gas-tight bag and introduces a light gas to enhance thermal conductivity. This allows the system to be assembled with less energy and equipment than schemes which require melting of regolith. A point design based on the new scheme is presented. Its mass from earth compares favorably with the mass of a regenerative fuel cell of equal capacity.

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