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Experimental Determination of In Situ Utilization of Lunar Regolith for Thermal Energy Storage
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Abstract
A Lunar Thermal Energy from Regolith (LUTHER) experiment has been designed and fabricated at the NASA Lewis Research Center to determine the feasibility of using lunar soil as thermal energy storage media. The experimental apparatus includes an alumina ceramic canister (10 in. diameter by 18 in. length) which contains simulated lunar regolith, a heater (either radiative or conductive), 9 heat shields, a heat transfer cold jacket, and 19 type B platinum rhodium thermocouples. The simulated lunar regolith is a basalt, mined and processed by the University of Minnesota, that closely resembles the lunar basalt returned to earth by the Apollo missions. The experiment will test the effects of vacuum, particle size, and density on the thermophysical properties of the regolith. The properties include melt temperature (range), specific heat, thermal conductivity, and latent heat of storage. Two separate tests, using two different heaters, will be performed to study the effect of heating the system using radiative, and conductive heat transfer. The physical characteristics of the melt pattern, material compatibility of the molten regolith, and the volatile gas emission will be investigated by heating a portion of the lunar regolith to its melting temperature (1162 °C) in a 10-6 torr vacuum chamber, equipped with a gas spectrum analyzer. A finite differencing SINDA model was developed at NASA Lewis to predict the performance of the LUTHER experiment. The analytical results of the code will be compared with the experimental data generated by the LUTHER experiment. The code will predict the effects vacuum, particle size, and density has on the heat transfer of the simulated regolith.
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Richter, S., "Experimental Determination of In Situ Utilization of Lunar Regolith for Thermal Energy Storage," SAE Technical Paper 929277, 1992, https://doi.org/10.4271/929277.Also In
References
- Colozza, A.J. 1991 “Analysis of Lunar Regolith Thermal Energy Storage.” November 1991 NASA 2 2
- Crane, Roger A. 1991 “Evaluation of In-Situ Thermal Energy Storage for Lunar Based Solar Dynamic Systems.” March 1991 NASA 19 40 40 40 41
- Goldich, S.S. 1971 “Lunar and Terrestrial Ilmenite Basalt” Science 171
- Taylor, S. R. 1975 “Lunar Science: A Post-Apollo View.” Pergamon Press N.Y. 372 73
- Weiblen, P.W. Morey, G.B. 1980 “Early Lunar Petrogenesis, Oceanic and Extraoceanic.” Papike, J.J. Merrill R.B. Proceedings of the Conference on the Lunar Highlands Crust 81
- Weiblen, P.W. Murawa, M.J. Reid, K.J. 1990 “Preparation of Simulants for Lunar Surface Materials.” Proceedings of Space '90 Aerospace/ASCE/Albuquerque NM 98 99
- Yoder, H.S. 1976 “Generation of Basaltic Magma” Nation Academy of Sciences Washington, D.C. 71 72