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

• Main Authors: Abu-Bakar, S.H., Muhammad-Sukki, F., Freier, D., Ramirez-Iniguez, R., Mallick, T.K., Munir, A.B., Mohd Yasin, S.H., Mas'ud, A.A., Bani, N.A.
• Format: Article
• Published: Elsevier 2016
• Subjects: K Law (General); TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.um.edu.my/18036/; http://dx.doi.org/10.1016/j.energy.2016.01.006
• Institution: Universiti Malaya

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.