Maliage, MRoos, TH2012-06-222012-06-222012-05Maliage, 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 2012http://hdl.handle.net/10204/5933Proceedings 1st Southern African Solar Energy Conference, Stellenbosch, 21-23 May 2012The 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.enRay tracingSolTraceHeliostatBeam down mirrorCalorimeterConference PresentationMaliage, M., & Roos, T. (2012). The flux distribution from a 1.25m2 target aligned heliostat: comparison of ray tracing and experimental results. http://hdl.handle.net/10204/5933Maliage, M, and TH Roos. "The flux distribution from a 1.25m2 target aligned heliostat: comparison of ray tracing and experimental results." (2012): http://hdl.handle.net/10204/5933Maliage M, Roos T, The flux distribution from a 1.25m2 target aligned heliostat: comparison of ray tracing and experimental results; 2012. http://hdl.handle.net/10204/5933 .TY - Conference Presentation AU - Maliage, M AU - Roos, TH AB - 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. DA - 2012-05 DB - ResearchSpace DP - CSIR KW - Ray tracing KW - SolTrace KW - Heliostat KW - Beam down mirror KW - Calorimeter LK - https://researchspace.csir.co.za PY - 2012 T1 - The flux distribution from a 1.25m2 target aligned heliostat: comparison of ray tracing and experimental results TI - The flux distribution from a 1.25m2 target aligned heliostat: comparison of ray tracing and experimental results UR - http://hdl.handle.net/10204/5933 ER -