... be completely avoided. A tool for measuring these deviations is needed for quality assurance and concentrator optimization. parabolic dish slope error distant observer color target ray tracing optical measurement shape measurement 2008 American Society of Mechanical Engineers ...

... results in collector shape measurement, flux measurement, ray tracing, and thermal performance analysis for parabolic troughs. It is shown that the measurement methods and the parameter analysis give consistent results. The interpretation of the results and their annual evaluation give hints on identified...