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- W27172067 abstract "The solar plant consists of an ''array subsystem,'' which includes the cells and their supporting surface, a supporting structure and tracking equipment, and a ''power conversion subsystem,'' principally composed of solid state inverters and transformers. Many design variations were examined for each of these components. Since solar cells are expensive, the array design effort explored the use of lenses and mirrors to concentrate the solar radiation on the cells. When either a flat, unconcentrated cell array or a concentrator device is not aimed directly at the sun, its output decreases; therefore, low-cost solar tracking arrays were designed to increase the daily energy yield. Because the conversion efficiency of photovoltaic cells decreases with temperature, forced air and water cooling were considered in addition to natural convection cooling. The annual energy output was calculated for each plant concept in Phoenix, using the solar cell technology expected to be available in about 1990: for the silicon single-crystal cell used in the space program, a 16% conversion efficiency and the 1985 ERDA cost goal of 500$/kWp (peak) for this cell (1975$) was postulated. At the peak solar radiation in Phoenix, about 1.1 kW/m/sup 2/, this implies a cell cost of 88$/m/sup 2/. Photovoltaic power more » plants were also designed for an advanced concept cell, a thin polycrystalline film of Cu/sub 2/S--CdS with a projected efficiency of only 10%, but the potential for markedly reduced material and manufacturing costs. 100$/kWp or 11$/m/sup 2/ was assumed as a representative cost for this cell in the late 1990's consistent with the ERDA goal of 100$/kWp cells by 2000 A.D. « less" @default.
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- W27172067 date "1977-01-01" @default.
- W27172067 modified "2023-09-27" @default.
- W27172067 title "Evaluation of a photovoltaic central power station" @default.
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