Theoretical concentration of solar radiation by central receiver systems |
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| Authors: | Takemaro Sakurai Yukio Shibata |
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| Affiliation: | Emeritus Professor of Tohoku University, Hachiman 4-13-6, Sendai, Japan 980;Research Institute for Scientific Measurements, Tohoku University, Sanjo-machi, Sendai, Japan 980 |
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| Abstract: | Solar concentrations by central receiver systems have been calculated theoretically for various values of obliquity of the incident radiation, assuming that plane heliostat-mirrors, sufficiently small in dimension, cover a circular field without clearance. Through this calculation, the performance characteristics of this system such as the availability of the radiant energy incident on the heliostat-field, the distribution of interruption by an adjacent mirror, the optimum rim-angle for the mean area- and the mean volume-concentration and the attainable temperature were revealed. The study was extended towards the practical problem of decreasing the number of heliostats by increasing the dimensions of heliostat-mirrors, and the effect of increasing mirror-dimensions was argued for both plane and curved mirrors. |
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