Mathematics – Logic
Scientific paper
May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ieees..13...48a&link_type=abstract
IEEE Spectrum, vol. 13, May 1976, p. 48-50.
Mathematics
Logic
Energy Technology, Microwave Transmission, Satellite Power Transmission, Satellite Solar Energy Conversion, Satellite Solar Power Stations, Turbogenerators, Biological Effects, Energy Conversion Efficiency, Energy Requirements, Lunar Rocks, Space Commercialization, Space Manufacturing, Technology Assessment, Transmission Efficiency
Scientific paper
Beaming of solar energy to earth via microwave systems from space-orbiting solar power stations is reviewed briefly. Closed-cycle helium turbogenerators fired by solar concentrators are rated far higher in efficiency (40% even in the earth environment) than solar cell panels (18% efficiency), but their weight (10 kg/kW) imposes a severe launch penalty. Attention is given to possibilities of mining satellite power station raw materials and fabricating satellite power station structures on the moon, with much lower launch costs and weight problems. Costs of space solar power stations and rectifying cell power-beaming antennas ('rectennas') and power systems needed to meet energy needs of coming decades are estimated. Microwave high-power transmission techniques and likely microwave hardware for the job are discussed. Biological and ecological effects of high-power microwave beams are mentioned, but considered minor.
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