SolTrace and Tonatiuh use ray-tracing methods to intersect the reflected solar rays with the receiver surfaces and construct irradiance profiles. DELSOL and HELIOS both use a convolution of the sunshape and optical errors for rapid calculation of the incident irradiance profiles on the receiver surfaces. All are available for free from their respective developers. The four optical modeling tools evaluated were DELSOL, HELIOS, SolTrace, and Tonatiuh.
Four optical modeling tools were evaluated using the National Solar Thermal Test Facility heliostat field combined with flat plate receiver geometry as a benchmark. Solar optical modeling tools are valuable for modeling and predicting the performance of solar technology systems.
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