High efficient solar tracker based on a simple shutter structure

Jin-Jia Chen, Te Shu Liu, Kuang Lung Huang, Po Chih Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In many photovoltaic (PV) or sunlight-illumination systems, solar trackers are always essential to obtain high energy/flux concentration efficiency, and that would lead to increase cost and extra power consumption due to the complex structure and heavy weight of the trackers. To decrease the cost while without sacrificing efficiency, a Fresnellens concentrator incorporated with a simple and cheap shutter, which consists of high reflective mirrors instead of conventional trackers, is proposed in this paper to provide solar tracking during the daytime. Thus, the time-variant and slant-incident sunlight rays can be redirected to vertically incident upon the surface of the Fresnel lens by appropriately arranging mirrors and swinging them to the proper slant angles with respect to the orientation of sunlight. The computer simulation results show that power concentration efficiency over 90%, as compared with the efficiency of directly normal incident sunlight, can be achieved with the mirror reflectance of 0.97 and for any solar incident angle within ±75 degrees to the normal of the Fresnel lens. To verify the feasibility and performance of the concentrator with the proposed shutter, a sunlight illumination system based on this novel structure is demonstrated. Both computer simulation and practical measurement results for the prototype of the sunlight illumination system are also given to compare with. The results prove the simple and high efficient shutter applicable to general PV or sunlight-illumination systems for solar tracking.

Original languageEnglish
Title of host publicationNonimaging Optics
Subtitle of host publicationEfficient Design for Illumination and Solar Concentration X
DOIs
Publication statusPublished - 2013 Nov 28
EventNonimaging Optics: Efficient Design for Illumination and Solar Concentration X - San Diego, CA, United States
Duration: 2013 Aug 252013 Aug 26

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8834
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherNonimaging Optics: Efficient Design for Illumination and Solar Concentration X
CountryUnited States
CitySan Diego, CA
Period13-08-2513-08-26

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Chen, J-J., Liu, T. S., Huang, K. L., & Lin, P. C. (2013). High efficient solar tracker based on a simple shutter structure. In Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X [88340X] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8834). https://doi.org/10.1117/12.2022832