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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5933

Title: The flux distribution from a 1.25m2 target aligned heliostat: comparison of ray tracing and experimental results
Authors: Maliage, M
Roos, TH
Keywords: Ray tracing
SolTrace
Heliostat
Beam down mirror
Calorimeter
Issue Date: May-2012
Citation: Maliage, M and Roos, TH. The flux distribution from a 1.25m2 target aligned heliostat: comparison of ray tracing and experimental results. Proceedings 1st Southern African Solar Energy Conference, Stellenbosch, 21-23 May 2012
Series/Report no.: Workflow;9141
Abstract: The purpose of this paper is to validate SolTrace for concentrating solar investigations at CSIR by means of a test case: the comparison of the flux distribution in the focal spot of a 1.25 m2 target aligned heliostat predicted by the ray tracing model with the experimental flux distribution measured using a calorimeter. Preliminary results show that the near-Gaussian shape and radial extent of the flux distribution in the focal spot of the 1.25m2 heliostat is well predicted by ray-tracing simulation using SolTrace. The level of flux is underpredicted by about 50%, however. The uncertainty of the peak flux measurement was found to be between 16 and 21%, so any conclusions regarding the flux level predictive accuracy of SolTrace first require repeating the experimental measurements taking care to increase the sensitivity of the flux measurement.
Description: Proceedings 1st Southern African Solar Energy Conference, Stellenbosch, 21-23 May 2012
URI: http://hdl.handle.net/10204/5933
Appears in Collections:Resource-based sustainable development
Sustainability science
Sustainable energy futures
Environmental and resource economics
General science, engineering & technology

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