Title:	Dome-Shaped Fresnel-Köhler: A Novel High Performance Optical Concentrator
Author(s):	P. Zamora Herranz, P. Benítez, L. Yang, J.C. Miñano, K. Araki
Keywords:	Module Manufacturing, Ray Tracing, High Efficiency, Concentrator, Design
Topic:	Material Studies, New Concepts and Ultra-High Efficiency
Subtopic:	Terrestrial Concentrator Systems
Event:	27th European Photovoltaic Solar Energy Conference and Exhibition
Session:	1AV.3.31
Pages:	253 - 256
ISBN:	3-936338-28-0
Paper DOI:	10.4229/27thEUPVSEC2012-1AV.3.31
Price:	0,00 EUR
Document(s):	paper

Abstract/Summary:

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The dome-shaped Fresnel-Köhler concentrator is a novel optical design for photovoltaic applications. It is based on two previous successful CPV optical designs: the FK concentrator with a flat Fresnel lens and the domeshaped Fresnel lens system developed by Daido Steel, resulting on a superior concentrator. This optical concentrator will be able to achieve large concentration factors, high tolerance (i.e. acceptance angle) and high optical efficiency, three key issues when dealing with photovoltaic applications. Besides, its irradiance is distributed on the cell surface in a very even way. The concentrator has shown outstanding simulation results, achieving an effective concentrationacceptance product (CAP) value of 0.72, on-axis optical efficiency over 85% and good irradiance uniformity on the cell provided by Köhler integration. Furthermore, due to its high tolerance, we will present the dome-shaped Fresnel-Köhler concentrator as a cost-effective CPV optical design. All this makes this concentrator superior to other conventional competitors in the current market.