Dubey, S., et al., Temperature Dependent Photovoltaic (PV) Efficiency and its Effect on PV Production in the World - A Review, Energy Procedia, 33 (2013), June, pp.Ndiaye, A., et al., Degradation Evaluation of Crystalline-silicon Photovoltaic Modules After a Few Operation Years in a Tropical Environment, Solar Energy, 103 (2014), May, pp.F., et al., Aging of Solar PV Plants and Mitigation of their Consequences, Proceedings, 17th International Conference on Power Electronics and Motion Control IEEE-PEMC, Varna, Bulgaria, 2016 Xuan Tien, N., Shin, S., A Novel Concentrator Photovoltaic (CPV) System with the Improvement of Irradiance Uniformity and the Capturing of Diffuse Solar Radiation, MDPI Applied Sciences, 6 (2016), 9, pp.Muthu Manokara, A., et al., Performance Analysis of Parabolic Trough Concentrating Photovoltaic Thermal System, Procedia Technology, 24 (2016), July, pp.Lemaire, X., Glossary of Terms in Sustainable Energy Regulation, REEEP/Sustainable Energy Regulation Network, Glossary, Warwick Business School, Coventry, UK, 2004.Increases of about 50% (from 0.123 kW/m2 to 0.1832 kW/m2) were obtained for the yearly average collected power per reflector area when decreasing the collector height in 3.5% (from 143 mm to 138 mm). The results also indicate that some modified concentrating solar collectors are promising when evaluating the yearly averaged energy produced per unit area, leading to evident improvements in the performance when compared to the current standard solar concentrating SOLARUS systems. Undoubtedly, the methodology presented in this paper for the design of the solar collector represents an important tool to optimize the binomial cost/effectiveness photovoltaic performance in the energy conversion process.
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Results show that efficiency is deeply influenced by reflector geometry details, collector tilt and location (latitude, longitude) of the solar panel installation and, mostly, by costumer demands. On an annual performance basis, a comparative analysis between several solar collector geometries was effectuated to search for higher efficiencies but with controlled costs. More complex physical models based on open-source and advanced object-oriented Monte Carlo ray tracing programs (SolTrace, Tonatiuh) have been used to study the relation between the collector annual performance and its geometry.
![soltrace tuto linear fresnel soltrace tuto linear fresnel](https://d3i71xaburhd42.cloudfront.net/c66db7115ed56ab77b17735cbb2d46c93695a6f0/15-Figure5-1.png)
The analysis is first accomplished using a numerical model that uses geometrical optics to study the interaction between the sunlight and a concentrating collector along the year. The aim of this work is the redesign of the reflector geometry in hybrid concentrating collectors that are currently manufactured by SOLARUS Sunpower AB** to improve the energy efficiency of their solar collectors.