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Open AccessArticle

A Misalignment Optical Guiding Module for Power Generation Enhancement of Fixed-Type Photovoltaic Systems

1
Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
2
Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
3
Metal Industries Research and Development Centre, Kaohsiung 81160, Taiwan
4
Interdisciplinary Program of Green and Information Technology, National Taitung University, Taitung 95092, Taiwan
5
Department of Physical Medicine and Rehabilitation, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan
*
Author to whom correspondence should be addressed.
These authors contributed equally.
Micromachines 2019, 10(10), 687; https://doi.org/10.3390/mi10100687
Received: 19 August 2019 / Revised: 3 October 2019 / Accepted: 7 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Advanced MEMS/NEMS Technology, Volume II)
: This study presents a misalignment light-guiding module to increase the effectiveness of absorbing light. For a general fixed-type photovoltaic (PV) panel, the misalignment light decreases the efficiency of the system. A solar tracking system was installed for obtaining higher power generation. However, the cost of the PV system and maintenance was 5–10 times higher than the general type. In this study, this module is composed of an array of misalignment light-guiding units that consist of a non-axisymmetric compound parabolic curve (NACPC) and a freeform surface collimator. The NACPC efficiently collects the misalignment light within ±30° and guides the light to the collimator. The light has a better uniformity and smaller angle at the exit aperture. The simulation results show that the optical efficiency of the unit was above 70% when the misalignment angle was smaller than 20°. The experimental results show that the power generation of the light-guiding unit was 1.8 times higher than the naked PV panel.
Keywords: misalignment light-guiding module; non-axisymmetric compound parabolic curve; freeform surface collimator misalignment light-guiding module; non-axisymmetric compound parabolic curve; freeform surface collimator
MDPI and ACS Style

Pan, C.-T.; Yen, C.-K.; Wang, S.-Y.; Sun, P.-Y.; Huang, S.-Y.; Hwang, Y.-M.; Liu, Z.-H.; Chu, L.-M.; Hoe, Z.-Y. A Misalignment Optical Guiding Module for Power Generation Enhancement of Fixed-Type Photovoltaic Systems. Micromachines 2019, 10, 687.

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