Solar flux distribution on central receivers: A projection method from analytic function
| Autor: | Domingo Santana, A. Sánchez-González |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Multi-panel cylindrical receiver
Heliostat field optical efficiency Heliostat Multi-aiming strategy Renewable Energy Sustainability and the Environment business.industry Parallel projection Oblique projection Monte Carlo method Solar power tower Image plane Convolution Optics Energías Renovables Flux density concentration Projection method business Analytic function Mathematics |
| Zdroj: | Renewable Energy. 74:576-587 |
| ISSN: | 0960-1481 |
| DOI: | 10.1016/j.renene.2014.08.016 |
| Popis: | This paper presents a methodology to project the flux distribution from the image plane into the panels of any central receiver in Solar Power Tower plants. Since analytic functions derived from the convolution approach are conveniently defined on the image plane, its oblique projection solves the distorted spot found in actual receivers. Because of its accuracy describing the flux distribution due to rectangular focusing heliostats, we make use of the analytic function on the image plane by Collado et al. (1986). Based on the projection method, we have developed a computer code successfully confronted against PSA measurements and SolTrace software, either for flat plate or multi-panel cylindrical receivers. The validated model overcomes the computation time limitation associated to Monte Carlo technique, with a similar accuracy and even higher level of resolution. For each heliostat in a field, the spillage is computed besides the rest of optical losses; parallel projection is used for shading and blocking. The resulting optical performance tool generates the flux map caused by a whole field of heliostats. A multi-aiming strategy is investigated on the basis of the radius of the reflected beams, estimated from error cone angles. Publicado |
| Databáze: | OpenAIRE |
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