A novel absorptive/reflective solar concentrator for heat and electricity generation: an optical and thermal analysis

Meng, X.-l. et al. (2016) A novel absorptive/reflective solar concentrator for heat and electricity generation: an optical and thermal analysis. Energy Conversion and Management, 114, pp. 142-153. (doi:10.1016/j.enconman.2016.02.011)

Meng, X.-l. et al. (2016) A novel absorptive/reflective solar concentrator for heat and electricity generation: an optical and thermal analysis. Energy Conversion and Management, 114, pp. 142-153. (doi:10.1016/j.enconman.2016.02.011)

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Abstract

The crossed compound parabolic concentrator (CCPC) is one of the most efficient non-imaging solar concentrators used as a stationary solar concentrator or as a second stage solar concentrator. In this study, the CCPC is modified to demonstrate for the first time a new generation of solar concentrators working simultaneously as an electricity generator and thermal collector. The CCPC is designed to have two complementary surfaces, one reflective and one absorptive, and is named as an absorptive/reflective CCPC (AR-CCPC). Usually, the height of the CCPC is truncated with a minor sacrifice of the geometric concentration. These truncated surfaces rather than being eliminated are instead replaced with absorbent surfaces to collect heat from solar radiation. The optical efficiency including absorptive/reflective part of the AR-CCPC was simulated and compared for different geometric concentration ratios varying from 3.6× to 4×. It was found that the combined optical efficiency of the AR-CCPC 3.6×/4× remained constant and high all day long and that it had the highest total optical efficiency compared to other concentrators. In addition, the temperature distributions of AR-CCPC surfaces and the assembled solar cell were simulated based on those heat flux boundary conditions. It was shown that the addition of a thermal absorbent surface can increase the wall temperature. The maximum value reached 321.5 K at the front wall under 50° incidence. The experimental verification was also adopted to show the benefits of using absorbent surfaces. The initial results are very promising and significant for the enhancement of solar concentrator systems with lower concentrations.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Knox, Professor Andrew and Siviter, Dr Jonathan and Ashraf, Mr Ali and Paul, Professor Douglas and Paul, Dr Manosh and Samarelli, Mr Antonio and Li, Dr Wenguang and Ferre Llin, Dr Lourdes and Mullen, Mr Paul and Montecucco, Dr Andrea and Han, Dr Guang
Authors: Meng, X.-l., Sellami, N., Knox, A. B., Montecucco, A., Siviter, J., Mullen, P., Ashraf, A., Samarelli, A., Ferre Llin, L., Paul, D. P., Li, W., Paul, M. C., Gregory, D. H., Han, G., Gao, M., Sweet, T., Freer, R., Azough, F., Lowndes, R., Xia, X.-l., and Mallick, T. K.
College/School:College of Science and Engineering > School of Chemistry
College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Energy Conversion and Management
Publisher:Elsevier
ISSN:0196-8904
ISSN (Online):1879-2227
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Energy Conversion and Management 114:142-153
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
614241Scalable Solar Thermoelectrics and Photovaltaics (SUNTRAP)Andrew KnoxEngineering & Physical Sciences Research Council (EPSRC)EP/K022156/1ENG - ENGINEERING ELECTRONICS & NANO ENG