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Conceptual Design of a Solar Powered Heat Pump for Lunar Base Thermal Control System
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Abstract
When permanent bases are established on the moon, various methods may be employed to reject the heat generated by the base. One proposed concept is the use of a heat pump operating with a vertical, flow-through thermal radiator which is mounted on a Space Station type habitation module. Since the temperature of the lunar surface varies over the lunar day, the sink temperature for heat pump heat rejection will vary. As a result, the heat pump power demand will also vary over the lunar day. This variable power requirement could be provided by a fixed horizontal solar photovoltaic (PV) array placed on the lunar surface, since its power production will vary sinusoidally with the time of day. Using a dedicated PV array to power the heat pump may represent a favorable mass trade-off compared to enlarging the size of the base's central power grid due to power system simplification and improvements in efficiency. To effectively evaluate the potential mass and performance of this integrated power and thermal system, an analytical study was conducted for an equatorial lunar base.
Conceptual designs and mass estimates were made for lunar base power systems for three cases: no heat pump, grid connected heat pump, and heat pump with a dedicated horizontal PV array. The heat pump with dedicated PV array was found to have a power mass penalty of only 20 kg/kW, 43% less than the grid connected system.
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Ewert, M., Keller, J., and Hughes, B., "Conceptual Design of a Solar Powered Heat Pump for Lunar Base Thermal Control System," SAE Technical Paper 961535, 1996, https://doi.org/10.4271/961535.Also In
References
- Ewert, M.K. “Investigation of Lunar Base Thermal Control System Options,” SAE Technical Paper 932112 23 rd International Conference on Environmental Systems Colorado Springs, CO July 1993
- Costello, F.A. Swanson, T.D. “Lunar Radiators with Specular Reflectors,” 5th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Seattle, WA June 1990
- Swanson, T.D. et. al. “Low-Temperature Thermal Control for a Lunar Base,” SAE Technical Paper 901242 20 th Intersociety Conference on Environmental Systems Williamsburg VA July 1990
- Petri, D.A. Cataldo, R.L. Bozek, J.M. “Power System Requirements and Definition for lunar and Mars Outposts” 25th IECEC 1990
- Keller, J.R. “A Thermal Analysis of a Module Mounted Radiator System on the Lunar Surface,” June 1995
- Simonsen, L. et. al. “Conceptual Design of a Lunar Base Thermal Control System” paper # LBS-88-225 Lunar Bases a Space Activities in the 21st Century Conference Houston, Tex April 5-7 1988
- Goldman et. al. “Lunar Base Heat Pump Phase 1 Final Report” July 1994
- Incropera, F.P. DeWitt, D.P. Fundamentals of Heat and Mass Transfer John Wiley and Sons New York 1985
- Panczak, T. “Thermal Synthesizer System: An Integrated Approach to Spacecraft Thermal Analysis,” SAE Technical Paper 911582 21st Internaional Conference on Environmental Systems San Francisco, CA 1991
- Cullimore, B.A. SINDA/FLUINT, Systems Improved Numerical Differencing Analyzer and Fluid Integrator, Version 2.6, User's Manual September 1993
- Klavins, A. User's Manual, Thermal Synthesizer System December 1990
- Keller, J. R. “A Thermal Analysis of a Solar Powered Heat Pump System” Lockheed Martin Engineering and Science Services Co. October 1995
- James, M.L. Smith, G.M. Wolford, J.C. Apllied Numerical Methods for Digital Computation 2nd Harper and Row New York 1977
- “Lunar/Mars Exploration Initiative: Conceptual Design of Power Systems” December 1989
- Keller, J. R. “Lunar Dust Contamination Effects on Lunar Radiator Shading Systems” Crew and Thermal Systems Division of Johnson Space Center June 1995
- Andish, K.K. “Study of Fin Efficiency of the CTB Flow-Though Radiator Panel for Space Station Freedom Heat Rejection System April 1991
- Hughes, B. “Lunar Base Power System for Solar Heat Pumps - options for power system architectures” Lockheed Martin Engineering and Science Services Co. October 1995
- Domijan, A. Buchh, T.A. “PV Array Driven Adjustable Speed Drive for a Lunar Base Heat Pump” University of Florida December 31 1995
- Hanford, A.J. “Advanced Active Thermal Control System Architecture Study” Lockheed Martin Engineering and Science Services Co. October 1995