Analytical Dynamic Modeling of Line-Focus Solar Collectors

[+] Author and Article Information
J. D. Wright

Solar Energy Research Institute, Golden, Colo. 80401

J. Sol. Energy Eng 103(3), 244-250 (Aug 01, 1981) (7 pages) doi:10.1115/1.3266247 History: Received June 08, 1981; Online November 11, 2009


Solar thermal electric power and industrial process heat systems may require a constant outlet temperature from the collector field. This constant temperature is most efficiently maintained by adjusting the circulating fluid flow rate. Successful tuning of analog or digital controllers requires a knowledge of system dynamics. Models relating deviations in outlet temperature to changes in inlet temperature, insolation, and fluid flow rate illustrate the basic responses and the distributed-parameter nature of line-focus collectors. When plotted in dimensionless form, the frequency response of a given collector is essentially independent of the operating conditions, suggesting that feedback controller settings are directly related to such easily determined quantities as collector gain and fluid residence time.

Copyright © 1981 by ASME
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