CONCLUSIONS Based on the proceeding analysis and discussion, the following conclusions are submitted: (1) Existing SPS designs produced by ADL/Raytheon/GAEC and The Boeing Company utilize photovoltaic and Brayton cycle conversion systems, respectively. The design of both systems is predicated upon technology improvements to achieve the long life, high efficiency requirements. Therefore, from a technology status standpoint, no significant differences are noted between the system systems. (2) Based on the cost factors reported by the two designers and a "normalized" transportation cost of $140/KG to GEO, the capital costs of the two systems on a per KW basis are about the same.
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