SPS Feasability Study SD76SA0239-2

Figure 2.2-16. Simplified Solar Array Configuration Radiation shape factors for the arrays and reflectors were computed using the cross-string method. The material optical properties that were used in analysis $re shown in Table 2.2-4. In geosynchronous orbit the thermal effects of earth emission and albedo are negligible. For reflector absorptivities of 0.15, a concentration ratio of 1.85 was used in the analysis. A solar conversion efficiency of 18 percent and a solar constant of 442 Btu/hr-ft2 also was used. The governing equations for the array temperatures were solved using the XF0031 computer code. The calculated array and reflector temperatures are: Table 2.2-4. Optical Properties