Effect of diffuse radiation on the performance of a rotationally asymmetrical optical concentrator.
Abu-Bakar, Siti Hawa
Munir, Abu Bakar
Yasin, Siti Hajar Mohd
Mas'ud, Abdullahi Abubakar
Bani, Nurul Aini
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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 the Proceedings of the 6th IEEE international conference on photonics (ICP), 14-16 March 2016, Sarawak, Malaysia. New York: IEEE [online], pages 71-73. Available from: https://dx.doi.org/10.1109/ICP.2016.7510017
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 plus/minus 30 degrees and plus/minus 40 degress 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.