analysis. The primary purpose here is to compare the projected SSPS concept to other energy-generation technologies. The validity of the cost and technological projections required for SSPS feasibility is an important but separate issue and is discussed in some detail in the other sections . The disaggregation of annual operating energies indicates that operations maintenance, budgeted at approximately $88 million per year, accounts for by far the largest portion of annual operating energies (60%). The next most significant component is solar array maintenance which accounts for approximately 35%. Antenna interface, transmitting antenna, and receiving station maintenance are generally quite minor in terms of their energy requirements. The ratio of Btu per dollar expended used for operations maintenance was taken from the ratio derived for transportation-flight costs. This was the most energy intensive per dollar of the capital sectors and flights to GEO for servicing will clearly be a major portion of operations maintenance. The next most energy intensive process was solar array manufacture and the same Btu/dollar relationship is assumed for solar array maintenance. The lower portion of Exhibit 44 shows the normalized annual energies required. The normalization process consists of adjusting the total annual energies required for a yield of 41,610 GWh per year at a load 12 factor of 0.95 which is equivalent to 142.1 x 10 Btu per year at 3,414 Btu/kWh. 5. Computational Assumptions and Source Estimates For most of the capital components in the SSPS, precisely comparable economic sectors cannot be identified from the DSI 357-sector model. In keeping with DSI's own procedures, the components are allocated back to source materials. The mechanism by which this is achieved and the relative energy intensity of the various sectors applied to specific components are shown in Exhibit 45. Exhibit 46 provides a parallel analysis of annual operating costs. In this exhibit, operating energy requirements per dollar expended (Btu/$)
RkJQdWJsaXNoZXIy MTU5NjU0Mg==