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건물에너지 절감을 위한 저온도차 발전 기술 적용 및 화이버 광학 집광에 관한 연구

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Alternative Title
A study on LTD power generation and fiber optic solar lighting for Building energy conservation
Abstract
Global energy consumption is increasing by the day, but the limited resources of major fossil fuels such as petroleum, coal and natural gas are expected to be depleted in the near future and likely to cause environmental
disasters if no sustainable resources are developed in near future. In order to secure stable energy supply, strenuous efforts are made around the world exploiting eco-friendly energy resources in parallel with encouraging the efficient use of energy in all sectors of society. Low-temperature differential (LTD) power generation has the potential to reclaim much of the energy consumed in buildings via harnessing various kinds of unused waste heat discarded by outdoor units of HVAC systems, cooling towers and heat pipes in buildings. On the other hand, much energy
could be saved in buildings if solar energy is wisely utilized where applicable. As studied in the latter part of this work, installation of fiber optic solar lighting could greatly reduce the energy consumption in buildings by reducing
lighting loads.
1. LTD power generation
Research on LTD power generation was carried out by using power generation via an LTD Stirling engine and power generation using Gadolinium with triboelectric nanogenerators (TENGs). Especially, comparisons
were made calculating the mechanical output against temperature differences and varying weights for a number of LTD Stirling engines. Of these, MM-7 engine showed the highest mechanical output of 2.98mW at △T=30°C. When
an AC motor was used, electric power of 0.09mW~0.12mW was measured. In the case of the Gadolinium Magnetic Generator, by conducting the experiment in the same manner, a mechanical output of about 29.4mW was observed at △T=45°C. This is much higher than those produced by LTD Stirling engines. In the case of TENG, when both methods were applied at the same time, the
resulting voltage was as high as 105V. Based on these results, it can be concluded that there are much room for utilizing waste heat using LTD engines in addition to those used here in connection with TENGs.
2. Fiber optic solar lighting system
For fiber optic solar lighting, two different types of solar concentrators (each mounted on a double-axis solar tracker) were used and their performance were compared; a parabolic dish and Fresnel lens. Illuminances of 400 ~ 600 lux were measured for the case of Fresnel lens, which are comparatively higher those by the parabolic dish of 100 ~ 200 lux. It is interesting to not about 5.9 million won of electric bill could still be saved by hiring the latter over the period of 30 years implicating the cost effectiveness of present systems.
Author(s)
김원식
Issued Date
2017
Awarded Date
2017. 2
Type
Dissertation
URI
http://dcoll.jejunu.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000007975
Alternative Author(s)
WonSik Kim
Affiliation
제주대학교 일반대학원
Department
대학원 에너지공학과
Advisor
천원기
Table Of Contents
LIST OF FIGURES Ⅳ
LIST OF TABLES Ⅷ
SUMMARY Ⅸ
Ⅰ. 서 론 1
1. 폐열을 활용한 저온도차 발전 기술 1
2. 화이버 광학 집광 시스템 3
Ⅱ. 이론적 배경 4
1. 스털링 엔진 4
1.1 스털링 사이클 4
1.2 스털링 엔진의 체적 및 압력 변화 5
1.3 이상적인 스털링엔진의 효율 10
1.4 스털링 엔진의 종류 및 특성 12
2. 가돌리늄 발전 시스템 16
2.1 가돌리늄의 역사 16
2.2 가돌리늄의 물리적 성질 16
2.3 가돌리늄의 기술적 적용 17
2.4 자력의 단위 17
3. TENG(triboelectric nanogenerator) 19
3.1 TENG 연구 사례 19
4. 화이버 광학 집광 21
4.1 광 에너지 21
4.2 광 에너지의 단위 22
4.3 자연채광 시스템(Daylighting System) 24
4.4 태양 위치의 천문학적 계산 28
Ⅲ. 저온도차 발전 기술 30
1. 실험장치 구성 30
1.1 저온도차 발전 장치 구성 ; 저온도차 스털링엔진 30
1.2 저온도차 발전 계측 장비 구성 34
1.3 저온도차 발전 장치 구성 ; 가돌리늄 발전장치 36
1.4 저온도차 발전 장치 구성 ; TENG(Triboelectric nanogenerator) 39
2. 실험방법 41
2.1 Mechanical power 41
2.2 Electrical power 45
2.3 TENG(triboeletric nanogenerator) 49
3. 실험결과 및 고찰 53
3.1 Mechanical power ; 저온도차 스털링엔진 53
3.2 Mechanical power ; 가돌리늄 발전장치 61
3.3 Electrical power ; 저온도차 스털링엔진 67
3.4 Electrical power ; 가돌리늄 발전장치 68
3.5 TENG의 성능 측정 71
4. 소결론 80
Ⅳ. 화이버 광학 집광 시스템 82
1. 화이버 광학 집광 시스템 장치 구성 82
1.1 화이버 광학적 집광 시스템 ; 제어부 82
1.2 화이버 광학적 집광 시스템 ; 센서부 84
1.3 화이버 광학적 집광 시스템 ; 집광부 87
1.4 화이버 광학적 집광 시스템 ; 전송부 90
1.5 데이터계측 장치 91
2. 실험방법 94
3. 실험결과 및 고찰 96
4. 전력요금 비교 98
5.소결론 102
Ⅴ. 결 론 103
참 고 문 헌 105
감 사 의 글 110
Degree
Master
Publisher
제주대학교 일반대학원
Citation
김원식. (2017). 건물에너지 절감을 위한 저온도차 발전 기술 적용 및 화이버 광학 집광에 관한 연구
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Faculty of Applied Energy System > Energy and Chemical Engineering
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