Computer Science – Performance
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9416522b&link_type=abstract
Presented at the First Annual Wireless Power Transmission Conference, San Antonio, TX, 23-25 Feb. 1993; sponsored by the Center
Computer Science
Performance
Costs, Laser Power Beaming, Laser Propulsion, Lunar Landing, Orbit Transfer Vehicles, Propulsion System Performance, Space Transportation, Spacecraft Propulsion, Earth Orbits, Lunar Bases, Lunar Orbits, Payloads, Photovoltaic Conversion, Propulsion System Configurations, Transfer Orbits
Scientific paper
Earth-based laser sites beaming laser power to space assets have shown benefits over competing power system concepts for specific missions. Missions analyzed in this report that show benefits of laser beam power are low Earth orbit (LEO) to geosynchronous Earth orbit (GEO) transfer, LEO to low lunar orbit (LLO) cargo missions, and lunar-base power. Both laser- and solar-powered orbit-transfer vehicles (OTV's) make a 'tug' concept viable, which substantially reduces cumulative initial mass to LEO in comparison to chemical propulsion concepts. Lunar cargo missions utilizing laser electric propulsion from Earth-orbit to LLO show substantial mass saving to LEO over chemical propulsion systems. Lunar-base power system options were compared on a landed-mass basis. Photovoltaics with regenerative fuel cells, reactor-based systems, and laser-based systems were sized to meet a generic lunar-base power profile. A laser-based system begins to show landed mass benefits over reactor-based systems when proposed production facilities on the Moon require power levels greater than approximately 300 kWe. Benefit/cost ratios of laser power systems for an OTV, both to GEO and LLO, and for a lunar base were calculated to be greater than 1.
Bozek John M.
Landis Geoffrey A.
Oleson Steven R.
Stavnes Mark W.
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