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Computing the solar vector
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DOI：10.1016/S0038-092X(00)00156-0.png)
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摘要
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High-concentration solar thermal systems require the Sun to be tracked with great accuracy. The higher the system concentration, the greater this accuracy must be. The current trend in solar concentrator tracking systems is to use open-loop controllers that compute the direction of the solar Vector based on location and time. To keep down the price of the tracking system, the controller is based on a low-cost microprocessor. These two facts impose important restrictions on the Sun position algorithm to be used in the controller, as it must be highly accurate and efficiently computable at the same time. In this paper, various algorithms currently available in the solar literature are reviewed and a new algorithm, developed at the Plataforma Solar de Almeria, which combines these two characteristics of accuracy and simplicity, is presented. The algorithm allows of the true solar vector to be determined with an accuracy of 0.5 minutes of are for the period 1999-2015. (C) 2001 Elsevier Science Ltd. All rights reserved.
Keyword:
solar vector
sun position
solar tracking
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期刊
IF:
6.6
论文数:
1.4W
被引数:
6.2W
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