Comparing Study of Biomimetic Spiral and Radial Staggered Layouts of the Heliostat Field

Abstract The radial staggered layout is classical and convenient which has almost been adopted by all the researchers while the biomimetic spiral layout is recommended in recent years, which has some obvious advantages and is promising to be demonstrated in real plant. However, the specific relationship between these two layouts is unknown. In this paper, a detailed compare and analysis of both layouts are introduced. The analysis is mainly concentrating on the circular field, because the large scale and heat storage are more suitable for the circular field that have been an irreversible trend in solar tower power plant. The two kinds of layout are compared from the following three aspects, which are the plant scale, optical efficiency and heliostat field area. Besides the two kinds of layouts, a few of combinations of both layouts are proposed and tested, such as replacing one or some zones of radial staggered field with spiral field, arranging the north field with radial staggered layout while the south part is biomimetic spiral or arranging in turn. The results show that some combination layouts indeed behave better than the original two kinds of layouts.

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