Abstract
The electric propulsion orbit transfer system for using the development of Solar Power Satellite (SPS) is evaluated from the point of view of energy investment. First, the energy cost of total SPS system is analyzed for the cases that the electric propulsion or the chemical propulsion is used as an orbit transfer system of SPS. Then, the minimum energy investment ratio in SPS to the total energy consumption on the earth in which the high levels of population and capital on the earth can be maintained is estimated by the evaluation model of SPS using World Dynamics. The simulation results show that about 12-18% reduction of energy investment ratio is possible in the case that the electric propulsion is used compared with in the case that the chemical propulsion is used as an orbit transfer system of SPS.
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