of 260. The mass calculations are based on 2.228 billion cells each supplying 4.04 watts to the power distribution system for a total of 9.00 gigawatts. TABLE 2.2-1 MASS ANALYSIS OF 9 GW GALLIUM ARSENIDE CONCENTRATOR SYSTEM 2.2.4 Gallium Arsenide Technical Discussion 2.2.4.1 System Performance Solar Constant 1.353 kW/m2 Collector Area 3.142E-2 m2 Collector Efficiency 9.5Z Cell Output 4.04 W Power Required to Bus 9.00 GW Collectors per SPS 2.228 billion Total Collector Area 70.0 square kilometers 2.2.4.2 Concentrator Design Many types of concentrators were considered, however, the Cassegrainian appears to be far superior in light of the design limits. Lenses were ruled out because they tend to be massive and may require large amounts of non- lunar material. A simple parabolic dish reflector offers some advantage over the Cassegrainian, however, it would add considerable difficulties to the design of the cooling system because the radiator would be facing the sun and would be separate from the primary reflector. The Compound Parabolic Concentrator (CPC) also has advantages over the Cassegrainian, in particular its tolerance to pointing error and its one piece construction.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==