태양광을 이용한 광생물반응기용 도광판 설계 및 제작에 관한 연구

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With rapid global industrialization, resource exhaustion and global environmental problems have become widespread and critical issues. In order to solve these problems, the use of new and renewable energy has attracted considerable attention. Among renewable energy sources, bioenergy from microalgae is considered to be very promising.
In this thesis, results of the optical design and fabrication of a light-guiding plate (LGP) to be used as an illumination system for photobioreactors are presented. A solar daylighting system was used as the light source for the LGP. This system consists of two parts: a light collector and a light transmitter. The light collector is made up of circular Fresnel lenses and is capable of solar tracking. The light transmitter is composed of plastic optical fibers (POFs) and delivers the sunlight collected by the light collector to the sides of the LGP.
First, we carried out modeling of light sources (exit ports of the POFs), a reflection film, and LGP patterns. Measured illumination distribution was used to model the light source. To model the reflection film, we used measured bidirectional reflective distribution function data. To model the LGP patterns, we assumed that they were Lambertian scatterers. The modeling parameters, i.e., the reflectance R and the scatterer width d of the LGP patterns, were determined by matching simulations with the experimentally measured illuminance distribution of a test LGP and were found to be R = 70% and d = 2.4 mm, respectively.
Next, we designed and fabricated an LGP that was optimized for the average deviation of the illuminance distribution by varying the maximum pattern spacing, minimum pattern spacing, and width of the Gaussian pattern-spacing function. A computerized numerical control (CNC) machine was used for the fabrication. The size of the fabricated LGP was 1000 mm × 500 mm × 10 mm. The measured optical characteristics of average illuminance and uniformity of illuminance distribution were 7,986 lx (photon flux density: 117.6 μΕ/(m2·s)) and 75.4%, respectively.
The LGP designed and fabricated in this work is intended to reduce energy consumption for biomass production. The LGP will be used as an illumination system for a flat-panel photobioreactor developed at the Biorefinery Center, Chosun University, and the overall energy efficiency will be tested.
Alternative Title
Design and Fabrication of Light-guiding Plate for a Photobioreactor Utilizing Sunlight
Alternative Author(s)
Hun Kim
조선대학교 광기술공학과
일반대학원 광기술공학과
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Table Of Contents

제1장 서 론 1

제2장 조명광학 기초이론 및 태양광 조명시스템 3
제1절 조명광학 이론 3
1. 복사측정학과 광도측정학 3
2. 광도측정학 단위 3
제2절 태양광 조명시스템 구성 8
1. 집광 시스템 8
2. 광전달 시스템 8
3. 도광판 9

제3장 태양광용 도광판 설계 14
제1절 도광판 모델링 14
1. 광원 14
2. 반사필름 14
3. 도광판 패턴 15
제2절 도광판 설계 23
1. 테스트용 도광판 제작 및 특성 측정 23
2. 도광판 패턴 모델 파라미터 결정 23
3. 도광판 설계 24

제4장 도광판 제작 및 성능평가 34

제1절 도광판 제작 34
제2절 도광판 성능평가 37
제3절 논의 42

제5장 결론 46

[참고문헌] 47
[감사의 글] 51
조선대학교 대학원
김훈. (2013). 태양광을 이용한 광생물반응기용 도광판 설계 및 제작에 관한 연구.
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General Graduate School > 3. Theses(Master)
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