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

• Main Authors: Freier, D., Muhammad Sukki, F., Abu Bakar, S. H., Ramirez Iniguez, R., Munir, A. B., Yasin, S. H. M., Mas'ud, A. A., Bani, N. A.
• Format: Conference or Workshop Item
• Published: Institute of Electrical and Electronics Engineers Inc. 2016
• Subjects: T Technology (General)
• Online Access: http://eprints.utm.my/id/eprint/73154/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981736666&doi=10.1109%2fICP.2016.7510017&partnerID=40&md5=d17d985ebdd637a58a047b7624dee072
• Institution: Universiti Teknologi Malaysia

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.