potential for a system as large as the SPS. The proposed generators weigh approximately 1.6 Ib/kW. Cryogenic superconducting generators could reduce this specific weight to at least 50% of that of the proposed generators.” IV-B-l-c-3.0 Conclusions and Recommendations The preceding analysis indicates that a number of "thermal engine" conversion concepts are potentially available; however, the closed Brayton cycle stands out as the most promising option. Of the several reflector concepts discussed, the faceted and the tensioned net systems appear most attractive. Much analysis remains to be done on the reflector and cavity-type absorber as these are the components for which the least work has been done to date. A heat rejection system comprised of a fin-tube radiator coupled to a Brayton cycle heat exchanger through a low-temperature liquid metal fluid loop powered by an electromagnetic pump appears feasible for satisfying SPS requirements. Much work remains on devising new methods of weight optimization for the radiator, as this is the heaviest single component of the system. In view of its favorable characteristics for SPS application, the closed Brayton cycle system approach should be pursued in parallel with photovoltaic system studies.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==