A Light Collimator with Freeform Microlens Array for Natural Light Illumination Systems
| Autor: | Xiao-Rong Wu, 吳曉蓉 |
|---|---|
| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 Because of the energy crisis, green energy such as solar, wind, hydro and geothermal energies are being developed in many countries. Effective renewable energy consumption is also one of the goals. To save energy, development of the daylighting system is necessary. Therefore, we developed the Natural Light Illumination System (NLIS). The core of NLIS is to improve the sunlight utilization that directly using sunlight, and avoiding loss of energy transformation. This paper presents an innovative freeform lens used in NLIS. NLIS is used to guide the natural light indoors for illumination, which system is implemented in energy saving smart buildings to reduce energy consumption. In developing a daylighting system, the overall system efficiency is crucial. In the NLIS, whether the light propagates parallel strongly affects the efficiency. In this paper simulate a multi-curvature lens to collimate rays propagated from different angles. We describe a method based on freeform microlens array which increase transmission efficiency. Results show with the freeform microlens array collimator, the light propagates 50.26% more parallel and the efficiency increase 24.76%. Enhance the core values of NLIS in the building illumination. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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