Performance Sensitivities for Point-Focus Dish Systems with Secondary Concentrators

    Research output: NRELTechnical Report


    This paper describes an analytical study of several performance-related benefits of using a secondary concentrator in point-focus dish designs. Previous research efforts have shown that design-point performance of dishes can be improved with secondary concentrators, especially for dishes with higher optical errors or at higher receiver operating temperatures. This work addresses the sensitivityto changes in design-point parameter values corresponding to both tracking and optical errors. An analytical model and a ray-trace model were used in analyzing these sensitivities. Results indicate that properly designed secondaries can significantly increase the tolerance to tracking errors and decrease the sensitivity to changes in optical errors from design-point values. Two approaches arerecommended on which to base the design of the secondary.
    Original languageAmerican English
    Number of pages8
    StatePublished - 1988

    NREL Publication Number

    • NREL/TP-253-3324


    • solar concentrator
    • solar thermal
    • tracking


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