A cascadable circular concentrator with parallel compressed structure for increasing the energy density

Nai-Lun Ku; Yi-Yung Chen; Wei-Che Hsieh; Allen Jong-Woei Whang

doi:10.1117/12.909878

21 February 2012 A cascadable circular concentrator with parallel compressed structure for increasing the energy density

Nai-Lun Ku, Yi-Yung Chen, Wei-Che Hsieh, Allen Jong-Woei Whang

Author Affiliations +

Proceedings Volume 8256, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices; 825619 (2012) https://doi.org/10.1117/12.909878
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

Due to the energy crisis, the principle of green energy gains popularity. This leads the increasing interest in renewable energy such as solar energy. Thus, how to collect the sunlight for indoor illumination becomes our ultimate target. With the environmental awareness increasing, we use the nature light as the light source. Then we start to devote the development of solar collecting system. The Natural Light Guiding System includes three parts, collecting, transmitting and lighting part. The idea of our solar collecting system design is a concept for combining the buildings with a combination of collecting modules. Therefore, we can use it anyplace where the sunlight can directly impinges on buildings with collecting elements. In the meantime, while collecting the sunlight with high efficiency, we can transmit the sunlight into indoor through shorter distance zone by light pipe where we needs the light. We proposed a novel design including disk-type collective lens module. With the design, we can let the incident light and exit light be parallel and compressed. By the parallel and compressed design, we make every output light become compressed in the proposed optical structure. In this way, we can increase the ratio about light compression, get the better efficiency and let the energy distribution more uniform for indoor illumination. By the definition of "KPI" as an performance index about light density as following: lm/(mm)², the simulation results show that the proposed Concentrator is 40,000,000 KPI much better than the 800,000 KPI measured from the traditional ones.

Citation Download Citation

Nai-Lun Ku, Yi-Yung Chen, Wei-Che Hsieh, and Allen Jong-Woei Whang "A cascadable circular concentrator with parallel compressed structure for increasing the energy density", Proc. SPIE 8256, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices, 825619 (21 February 2012); https://doi.org/10.1117/12.909878

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available