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Thermal response of solar receiver aperture plates during sun walk-offThe tracking mechanism for a point-focusing concentrator may be subject to failure. If this should occur, the solar image will travel across the aperture plate, and it may also impinge on the adjacent support structure. Such an event is called 'sun walk-off'. The present investigation is concerned with the transient response of different aperture plate materials to the intense heating produced in a typical walk-off situation for parabolic dish concentrators. Receivers for two solar module systems are considered, including a high-temperature receiver that utilizes a 2-milliradian (mrad) concentrator, and a lower-temperature receiver which is coupled with a 4-mrad concentrator. It is found that during a walk-off situation the solar image travels in a straight line in the radial direction. The results obtained for a copper aperture plate were disappointing. It appears that passive metallic plates without cooling or other protective support cannot withstand the intense heating.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Wen, L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Roschke, J.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1982
Subject Category
Energy Production And Conversion
Report/Patent Number
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics and American Society of Mechanical Engineers, Joint Thermophysics, Fluids, Plasma and Heat Transfer Conference
Location: St. Louis, MO
Start Date: June 7, 1982
End Date: June 11, 1982
Accession Number
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