Theoretical and experimental analysis of an innovative dual-axis tracking linear Fresnel lenses concentrated solar thermal collector

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dc.contributor.authorPerini, Simoni
dc.contributor.authorTonnellier, Xavier
dc.contributor.authorKing, Peter
dc.contributor.authorSansom, Christopher L.
dc.date.accessioned2017-07-10T14:18:36Z
dc.date.available2017-07-10T14:18:36Z
dc.date.issued2017-06-21
dc.description.abstractLinear concentrating solar thermal systems offer a promising method for harvesting solar energy. In this paper, a model for a novel linear Fresnel lens collector with dual-axis tracking capability is presented. The main objective is to determine the performance curve of this technology by means of both experiment and theoretical analysis. A mathematical model including the optical model of the concentrator and the heat transfer model of the receiver pipe was developed. This tool was validated with experimental data collected using a proof of concept prototype installed in Bourne, UK. The performance curve of the collector was derived for temperatures between 40 °C and 90 °C. The results show that the global efficiency of the collector is limited to less than 20%. The energy losses have been analysed. The optical losses in the lens system accounts for 47% of the total energy dissipated. These are due to absorption, reflection and diffraction in the Fresnel lenses. Furthermore manufacturing error in the lens fabrication has to be considered. One third of the solar radiation collected is lost due to the low solar absorptance of the receiver pipe. Thermal radiation and convection accounts for 6% of the total as relatively low temperatures (up to 90 °C) are involved. In order to increase the performance of the system, it is recommended to install an evacuated receiver and to insulate the recirculation system. Considering data from manufacturers, these improvements could increase the global efficiency up to 55%. Utilising the results from this work, there is the intention of building an improved version of this prototype and to conduct further tests.en_UK
dc.identifier.citationSimoni Perini, Xavier Tonnellier, Peter King, Christopher Sansom, Theoretical and experimental analysis of an innovative dual-axis tracking linear Fresnel lenses concentrated solar thermal collector, Solar Energy, Volume 153, 1 September 2017, Pages 679-690en_UK
dc.identifier.cris17972768
dc.identifier.issn0038-092X
dc.identifier.urihttp://dx.doi.org/10.1016/j.solener.2017.06.010
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12176
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectSolar energyen_UK
dc.subjectFresnel lensen_UK
dc.subjectTwo-axis tracking systemen_UK
dc.titleTheoretical and experimental analysis of an innovative dual-axis tracking linear Fresnel lenses concentrated solar thermal collectoren_UK
dc.typeArticleen_UK

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