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Status
Electronic Resource
Call number
Publication
SAND Report: SAND81-0159, April 1981.
Collection
Language
Library's review
ABSTRACT:
This report deals with the effects of certain systematic errors on performance and, therefore, their influence on the design of troughs. Systematic rotation error is the angle between the re-fleeter vertex-focus axis and the vertex-sun axis1 systematic receiver location error is the
This report deals with the effects of certain systematic errors on performance and, therefore, their influence on the design of troughs. Systematic rotation error is the angle between the re-fleeter vertex-focus axis and the vertex-sun axis1 systematic receiver location error is the
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vectorial deviation of a receiver from focus. The existence of systematic rotation errors and systematic receiver location errors can have a significant effect on the annual performance of parabolic trough collectors. These systematic errors can exist in addition to errors which are random in nature and which, therefore, can be treated statistically. Systematic rotation errors of 0.016 radians result in annual performance degradation of greater then 30%. Systematic receiver location errors can have a similar effect depending upon magnitude. This report is an extension of previous efforts in developing the analytical tools for optimizing parabolic trough designs for consideration by industry. The current work outlines the technique for calculating the influence of systematic errors on performance and suggests methods for identifying and minimizing these errors. Show Less