When designing or evaluating a dish concentrator system, it is desirable to determine the incident flux profile on the receiver surface, regardless of the absorber surface geometry. During the design process, analytical tools are used to predict flux profiles. During product evaluation, a flux-mapper (beam characterization system) can be used to measure the flux profile on a flat target surface. Radiosity concerns typically limit flux mapping measurements of dish-engine systems to a flat plate target. We propose and demonstrate an analytical method to project such a measured flat-target flux profile onto a non-flat receiver surface. We analytically estimate the angular content of the flux profile, and use this estimate combined with the measured flat-plate flux profile to project an estimate of the flux pattern onto another receiver surface. In this paper, we analytically demonstrate the technique. We first model a dish concentrator using CIRCE2. We then develop an analytic flux-map, in CIRCE2, on a flat target, simulating a flux-mapper output. Next, we use our new software tool and the CIRCE2 angular flux binning to project this flux pattern onto a non-flat receiver surface. Finally, we run a CIRCE2 model of the same dish with the non-flat target geometry, and compare this CIRCE2 output to the projected data. We also demonstrate the technique using a measured flux-map from a dish system in the field.
- Advanced Energy Systems Division and Solar Energy Division
Projection of Flat-Plane Fluxmap Images Onto Non-Flat Receiver Surfaces
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Yellowhair, J, & Andraka, CE. "Projection of Flat-Plane Fluxmap Images Onto Non-Flat Receiver Surfaces." Proceedings of the ASME 2011 5th International Conference on Energy Sustainability. ASME 2011 5th International Conference on Energy Sustainability, Parts A, B, and C. Washington, DC, USA. August 7–10, 2011. pp. 485-494. ASME. https://doi.org/10.1115/ES2011-54153
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