The schematic of one version of a photovoltaic converter with a solar energy concentrator is shown in Fig. 1. Concentratorscan be manufactured of carbon-filled plastic with 0.05-0.1 micron aluminum or silver mirror coatings. Galvanoplastic manufacture of concentrators is considered attractive. Highly efficient, radiation-resistant GaAs-based concentrators have been developed which are designed for a concentrated solar radiation flux (c=80... 100- fold), with 20% efficiency and operating temperatures up to 150°C. The investigations conducted at the Scientific-Research Institute of Thermal Processes (NIITP) have substantiated the selection of this solar concentrator scheme. They demonstrated that an orientational accuracy of the one-mirror scheme of not more than 1.5 degrees was sufficient.
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