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Performance analysis of a solar window incorporating a novel rotationally asymmetrical concentrator.

Abu-Bakar, Siti Hawa; Muhammad-Sukki, Firdaus; Freier, Daria; Ramirez-Iniguez, Roberto; Mallick, Tapas Kumar; Munir, Abu Bakar; Yasin, Siti Hajar Mohd; Mas'ud, Abdullahi Abubakar; Bani, Nurul Aini


Siti Hawa Abu-Bakar

Firdaus Muhammad-Sukki

Daria Freier

Roberto Ramirez-Iniguez

Tapas Kumar Mallick

Abu Bakar Munir

Siti Hajar Mohd Yasin

Abdullahi Abubakar Mas'ud

Nurul Aini Bani


The race towards achieving a sustainable zero carbon building has spurred the introduction of many new technologies, including the BIPV (building integrated photovoltaic) system. To tackle the high capital cost of BIPV systems, LCPV (low-concentration photovoltaic) technology was developed. Besides the reduction of cost, the LCPV technology also produces clean energy for the building and promotes innovative architectural design. This paper presents a novel type of concentrator for BIPV systems. This concentrator, known as the RADTIRC (rotationally asymmetrical dielectric totally internally reflecting concentrator), was incorporated in a small double glazing window. The RADTIRC has a geometrical concentration ratio of 4.9069x. A series of experiments were carried out to evaluate the performance of the solar PV window both indoors and outdoors. It was found that the RADTIRC-PV window increases the short circuit current by 4.13x when compared with a non-concentrating solar PV window. In terms of maximum power generation, the RADTIRC-PV window generates 0.749 W at normal incidence, 4.8x higher than the non-concentrating counterpart.


ABU-BAKAR, S.H., MUHAMMAD-SUKKI, F., FREIER, D., RAMIREZ-INIGUEZ, R., MALLICK, T.K., MUNIR, A.B., YASIN, S.H. M., MAS'UD, A.A. and BANI, N.A. 2016. Performance analysis of a solar window incorporating a novel rotationally asymmetrical concentrator. Energy [online], 99, pages 181-192. Available from:

Journal Article Type Article
Acceptance Date Jan 6, 2016
Online Publication Date Feb 12, 2016
Publication Date Mar 15, 2016
Deposit Date Mar 3, 2016
Publicly Available Date Feb 13, 2017
Journal Energy
Print ISSN 0360-5442
Electronic ISSN 1873-6785
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 99
Pages 181-192
Keywords Solar photovoltaic; Solar concentrator; Rotationally asymmetrical concentrator; Building integrated photovoltaic system
Public URL


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