NASA/DOE Reference System Concept: Constellation of many (60 in full configuration) large satellites in GEO supplies U.S. domestic baseload power, as alternative to generation via fossil fuels. Key Features: Silicon Planar Array 1 km aperture klystron phased array transmitter connected via slip-ring Large LEO Construction Base staffed by hundreds of astronauts 2 stage fully reusable winged delivery system Solar Electric OTV for Cargo transfer, Chemical OTV for Personnel Suggestor/Source: The specific design shown opposite was a Boeing proposal as part of the NASA-DOE investigation. Discussion Tins system was designed in response to the oil embargo of the early 1970's. Tims, the impetus for this design was purely an energy supply and energy independence need. Present-day environmental concerns about fossil fuel energy sources were not a driver. However about half of the $20 million expended on the studies was spent on environmental issues. Most important in distinguishing this reference system from more recent concepts is the fact that the reference system was designed to provide U.S. domestic baseload electricity needs through a constellation of 60 satellites, each of which would contribute 5 GW to the terrestrial grids. Wliile there was some investigation of providing baseload power to Europe, the needs of developing countries were not specifically addressed in any detail in the reference case. Human activity in space was emphasized throughout the design, deployment, and operation of the system. Advantages Disadvantages Continuous power generation All-weather operations Large scale power capacity Only addressed US domestic market Very large Human presence required for construction Large number of ETO launches Very large infrastructure investment before first revenue
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