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

Meng, Xian-long; Sellami, Nazmi; Knox, Andrew R.; Montecucco, Andrea; Siviter, Jonathan; Mullen, Paul; Ashraf, Ali; Samarelli, Antonio; Llin, Lourdes F.; Paul, Douglas J.; Li, Wen-guang; Paul, Manosh C.; Gregory, Duncan H.; Han, Guang; Gao, Min; Sweet, Tracy; Freer, Robert; Azough, Feridoon; Lowndes, Robert; Xia, Xin-lin; Mallick, Tapas K.

Authors

Xian-long Meng

Nazmi Sellami

Andrew R. Knox

Andrea Montecucco

Jonathan Siviter

Paul Mullen

Ali Ashraf

Antonio Samarelli

Lourdes F. Llin

Douglas J. Paul

Wen-guang Li

Manosh C. Paul

Duncan H. Gregory

Guang Han

Min Gao

Tracy Sweet

Robert Freer

Feridoon Azough

Robert Lowndes

Xin-lin Xia

Tapas K. Mallick



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.

Citation

MENG, X.-L., SELLAMI, N., KNOX, A.R., MONTECUCCO, A., SIVITER, J., MULLEN, P., ASHRAF, A., SAMARELLI, A., LLIN, L.F., PAUL, D.J., LI, W.-G., 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. 2016. A novel absorptive/reflective solar concentrator for heat and electricity generation: an optical and thermal analysis. Energy conversion and management [online], 114, pages 142-153. Available from: https://doi.org/10.1016/j.enconman.2016.02.011

Journal Article Type Article
Acceptance Date Feb 4, 2016
Online Publication Date Feb 18, 2016
Publication Date Apr 15, 2016
Deposit Date Jan 17, 2020
Publicly Available Date Jan 17, 2020
Journal Energy conversion and management
Print ISSN 0196-8904
Electronic ISSN 1879-2227
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 114
Pages 142-153
DOI https://doi.org/10.1016/j.enconman.2016.02.011
Keywords Solar concentrator; Absorption; Reflection; Optical efficiency
Public URL https://rgu-repository.worktribe.com/output/819718

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