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Proceedings of CHT-17 ICHMT International Symposium on Advances in Computational Heat Transfer
May 28 - June 1, 2017, Napoli, Italy

DOI: 10.1615/ICHMT.2017.CHT-7


ISBN Print: 9781-56700-4618

ISSN: 2578-5486

NUMERICAL INVESTIGATION OF LUNAR REGOLITH THERMAL ENERGY STORAGE IN A LUNAR BASED SOLAR THERMAL POWER SYSTEM

pages 1437-1449
DOI: 10.1615/ICHMT.2017.CHT-7.1530
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Краткое описание

The manned deep-space exploration is a hot topic of the current space activities. The continuous supply of thermal and electrical energy for the scientific equipment and human beings is a crucial issue for the lunar outposts. In-Situ Resource Utilization (ISRU) can have a tremendous beneficial impact on robotic and human exploration of the Moon, Mars and other planets. In the lunar outposts, it is very necessary to utilize in-situ resource effectively and sufficiently to minimize the hardware which must be brought from the Earth and reduce the mission cost significantly. Since the night lasts for periods of about 350 hours at most locations on the lunar surface, massive energy storage is required for continuous energy supply during the lengthy lunar night and the in-situ resource utilization is demanded. Accordingly, the idea has been proposed to use lunar regolith for thermal energy storage and electrical power generation. A lunar based solar thermal power system with regolith thermal storage is presented in this paper. To improve the thermal conductivity and energy storage efficiency, the processed regolith is adopted in the regolith thermal storage. The solar heating of the regolith thermal storage can be enhanced by a concentrator that tracks the sun to direct the full solar flux to the regolith surface throughout the lunar day. The temperature evolution and distribution of the regolith energy storage system are analysed. The analytical results shows that the lunar based solar thermal power system with regolith thermal storage can meet the requirement of the continuous energy supply for lunar outposts.

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