Skip to main content

Research Repository

Advanced Search

Effect of diffuse radiation on the performance of a rotationally asymmetrical optical concentrator.

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


Nurul Aini Bani

Daria Freier

Firdaus Muhammad-Sukki

Siti Hawa Abu-Bakar

Roberto Ramirez-Iniguez

Abu Bakar Munir

Siti Hajar Mohd Yasin

Abdullahi Abubakar Mas'ud


This paper evaluates the performance of a recently patented rotationally asymmetrical dielectric totally internally reflective concentrator (RADTIRC) under diffuse radiation. The RADTIRC has a geometrical concentration gain of 4.969 and two half acceptance angles of ± 30° and ± 40° along the x-axis and z-axis respectively. Simulation and experimental work have been carried out to determine the optical concentration gain under diffuse radiation. It was found that the RADTIRC has an optical concentration gain of 1.94 under diffuse irradiance. The experimental results for the single concentrator showed an optoelectronic gain of 2.13, giving a difference of 9.8% due to factors such as the presence of direct radiation during experiments, the increase in diffuse radiation due to the reflection from surrounded buildings as well as from the ground reflection.


FREIER, D., MUHAMMAD-SUKKI, F., ABU-BAKAR, S.H., RAMIREZ-INIGUEZ, R., MUNIR, A.B., YASIN, S.H.M., MAS'UD, A.A. and BANI, N.A. 2016. Effect of diffuse radiation on the performance of a rotationally asymmetrical optical concentrator. In Proceedings of the 6th Institute of Electrical and Electronic Engineers (IEEE) International conference on photonics (ICP), 14-16 March 2016, Sarawak, Malaysia. Piscataway: IEEE [online], pages 71-73. Available from:

Conference Name 6th IEEE International conference on photonics (ICP)
Conference Location Sarawak, Malaysia
Start Date Mar 14, 2016
End Date Mar 16, 2016
Acceptance Date Mar 14, 2016
Online Publication Date Mar 14, 2016
Publication Date Jul 14, 2016
Deposit Date Sep 19, 2016
Publicly Available Date Sep 19, 2016
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Article Number 7510017
Pages 71-73
Keywords Building integrated photovoltaic systems; Optoelectronic gain; Rotationally asymmetrical dielectric totally internally reflecting concentrator; Solar photovoltaic; Building integrated photovoltaics; Buildings; Dielectrics; Optical reflection; Reflectivity
Public URL


Downloadable Citations