Simple methods to approximate CPC shape to preserve collection efficiency
Authors: Jafrancesco D., Sani E., Fontani D., Mercatelli L., Sansoni P., Giannini A., Francini F.
Autors Affiliation: Italian National Institute of Optics, CNR-INO, Largo E. Fermi 6, 50125 Firenze, Italy
Abstract: The compound parabolic concentrator (CPC) is the most efficient reflective geometry to collect light to an exit port. Anyway, to allow its actual use in solar plants or photovoltaic concentration systems, a tradeoff between system efficiency and cost reduction, the two key issues for sunlight exploitation, must be found. In this work, we analyze various methods to model an approximated CPC aimed to be simpler and more cost-effective than the ideal one, as well as to preserve the systemefficiency. The manufacturing
easiness arises from the use of truncated conic surfaces only, which can be realized by cheap machining techniques.We compare different configurations on the basis of their collection efficiency, evaluated by means of nonsequential ray-tracing software. Moreover, due to the fact that some configurations are beam dependent and for a closer approximation of a real case, the input beam is simulated as nonsymmetric, with a nonconstant irradiance on the CPC internal surface.
Journal/Review: INTERNATIONAL JOURNAL OF PHOTOENERGY
Volume: 2012 Pages from: 863654-1 to: 863654-7
KeyWords: Nonimaging Fresnel Lens; Solar collectors; Traking errors; Concentrators; Optimization; Performance; Radiation; Optical designDOI: 10.1155/2012/863654Citations: 6data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-02-23References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here