• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2011년도 제43차 동계학술발표논문집 19권1호
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• pp.299-300
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• 2011

태양에너지를 에너지 공급원으로 하고 LED 램프를 조명용 광원으로 사용하여 적은 전력 소모와 연장된 램프의 수명으로 에너지 소모를 크게 줄이고, 유지 보수 관리 비용을 획기적으로 줄일 수 있는 LED 조명제어시스템을 개발하였다. 점등 회로, 구동회로 등의 최적화된 설계와 구성으로 광 변환 효율을 높여 소형화, 경량화 되도록 하고, 환경 친화적인 조명 광원으로서 효율적인 성능을 얻을 수 있도록 한다.

• 해양환경안전학회지
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• 제17권2호
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• pp.161-166
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• 2011

본 연구에서는 태양전지로 구동되는 전기추진 소형선박을 제안하여 선체의 설계 및 모형선 시험을 행하였다. 선체 모양은 배의 안정성 및 태양과의 수광면적을 고려하여 차타마란형으로 제작하였다. 계산에 의하면 설계 선박의 선속을 5 knots로 할 때 1.1마력으로 충분한 추력이 산출되었으나 실제의 선속은 태양에너지 등 기후조건에 의해 산출된 값보다 약간 낮았다.

• 한국태양에너지학회 논문집
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• 제28권3호
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• pp.27-34
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• 2008

A series of outdoor tests were conducted on a fiber optic solar concentrator system for its performance on daylighting. The system is comprised of four main components - a parabolic dish reflector, a convex mirror, a homogenizer tube and an optical fiber cable. Results show that the system could be successfully applied for indoor lighting if some improvements are made for light transmiting (optical) cables. A maximum concentration ratio of 90 was observed delivering the illuminance of 4,800 lux at a distance of 1.2m from the diffuser for the outdoor illuminance of 102,100 lux.

• 한국ITS학회 논문지
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• 제12권1호
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• pp.109-120
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• 2013

본 논문에서는 태양광 발전을 이용한 하이브리드 도로조명 제어 시스템 설계를 제안한다. 제안하는 하이브리드 도로조명 점등제어 시스템은 태양광 발전을 이용하여 하이브리드 컨트롤러를 통해 전원을 공급하고 도로조명을 점등제어가 가능하도록 설계한다. 전력 부족시 상시전력을 공급하도록 제어하고 인체 감지시 자동 조명 제어가 되도록 게이트웨이는 도로조명에 zigbee를 이용하여 제어명령을 전송한다. 미리 설정해 놓은 타임 스케줄에 의해 시스템의 상태를 결정하고 동작시키는 점등제어 알고리즘을 적용한다. 본 논문에서 제안하는 하이브리드 도로조명 점등제어 시스템의 효율성 분석결과, 등주 당 하루에 129.6W의 전력소비를 하였고 1개월간 3.8KW, 연간 47.3KW를 소비하였다. 결과적으로 기존의 점등제어 시스템보다 76.2%의 전력소비량 감소와 76.8%의 전력요금이 감소되어 에너지 효율을 높일 수 있었다.

• International Journal of Computer Science & Network Security
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• 제22권3호
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• pp.89-94
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• 2022

The Saudi Vision 2030 defined the directions of the national economy and market towards diversifying sources of income, and developing energy to become less dependent on oil. The study sought through a theoretical review to identify the reality of the energy sector and the areas of investment available in the field of renewable energy. Findings showed that investment in the renewable energy sector is a promising source according to solar, wind, hydrogen, geothermal energy and burning waste than landfill to extract biogas for less emission. The renewable energy sector faces challenges related to technology, production cost, price, quantity of production and consumption, and markets. The study revealed some recommendations providing and suggested electronic marketing system to provide investors and consumers with energy available from renewable sources.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2011년도 춘계학술발표대회 논문집
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• pp.156-161
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• 2011

In case of newly constructed buildings, the construction type is almost Curtain-wall system or large window in building skin. However, these kind of buildings have problems with regulations on building energy efficiency. And national regulations on building energy efficiency limit only the V-factor of window(except infiltration), it is hard to predict energy consumption of Curtain-wall buildings which gain large solar energy in summer. In this study, the influence of LSG(Light to Solar Gain) on energy performance was theoretically analyzed with simulation. LSG is the value of VLT divide SHGC and represents the optical performance of the glass or glazing. The Window & Therm program developed in LBNL was used to analyze window systems and EnergyPlus was used to building energy. Cases of glazing are three types; single coated Low-e clear glazing, tripple coated Low-e clear glazing, tripple coated Low-e tinted glazing. The results of this study are follows; 1) The building energy consumption of Alt-l, 2, 3 were about 300, 253, $259kWh/m^2{\cdot}yr$ respectively. Therefore, improvement of LSG could save the energy up to 16%. 2) The saved energy could be converted 1 billion won as annual benefit of total energy costs 3) SHGC and LSG more influence on cooling energy than heating energy in office buildings.

• 한국태양에너지학회 논문집
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• 제31권2호
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• pp.82-88
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• 2011

The artificial increase in the solar intensity incident on solar cells using lenses or mirrors can allow solar cells to generate equivalent power with a lower cost. There are two types of concentration optics for solar energy conversion. One is to use mirrors, and the other is to use Fresnel lenses. The gains that can be achieved with a Fresnel lens or a parabolic mirror are compared. The result showed the gains are comparable and the two configurations were developed competitively. In application areas of Fresnel lenses as solar concentrators, several variations of design were devised and tested. Some PV systems still use commercially available flat Fresnel lenses as concentrators. A convex linear Fresnel lens to improve the concentration ratio and the efficiency is devised and flat linear Fresnel lens in thermal energy collection is utilized. In this study, we designed and optimized flat Fresnel lens and the 'light pipe' to develop 500X concentrated solar PV system. In the process, we compare the transmission efficiencies according to groove types. We performed rigorous ray tracing simulation of the flat Fresnel lenses. The computer aided simulation showed the 'grooves in case' has the better efficiency than that of 'grooves out case'. Based on the ray-trace results we designed and manufactured sample Fresnel lenses. The optical performance were measured and compared with ray-trace results. Finally, the optical efficiency was measured to be above 75%. All the design and manufacturing were performed based on that InGaP/InGaAs/Ge triple junction solar cell is used to convert the photon energy to electrical power. Field test will be made and analyzed in the near future.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2012년도 춘계학술발표대회 논문집
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• pp.248-254
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• 2012

In the situation of expanding domestic solar power supply business long-term performance modeling of a proposed solar-cooling and cleaning system to increase electromotive force and light transmission is carried out to test the effectiveness of the system. To test the effectiveness of the system, the data which comparing the solar power planet installing the system to not installing at the same time is used. A difference between the utilization factor of each comparison group were recorded. Approximately from one year to two years Field Test was performed, Result of apply to cooling/cleaning technology, Each of plant by From least 7 percent up to 16 percent utilization factor increased, and the cooling / cleaning is output through improved as a result of the determined.

• 전기학회논문지
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• 제66권8호
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• pp.1236-1241
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• 2017

We deposited Al-doped ZnO (ZnO:Al) thin films on glass substrates ($200mm{\times}200mm$) by using in-line magnetron sputtering system. Effects of various deposition parameters such as working pressure, deposition power and substrate temperature on optoelectronic characteristics including surface-texture etching profiles were carefully investigated in this study. We found that relatively low working pressure and high deposition power offered to obtain enhanced conductivity and optical transmittance. Haze properties showed similar trend with the transmittance. Furthermore, surface-texture etching study exhibited good morphologies when the films were deposited at $200-300^{\circ}C$. On the basis of these optimizations, we could find the deposition region that produces highly transparent and conductive properties including efficient light scattering capability.

• 전기전자학회논문지
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• 제21권3호
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• pp.211-218
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• 2017

본 논문에서는 CPU가 없는 자가동력 태양광 트랙커 시스템을 제안한다. 기존의 태양광 트랙커 시스템은 CPU를 사용하기 때문에 비용과 내구성의 문제가 발생한다. 또한, 기존의 태양광 트랙커 시스템은 설치 장소 및 환경의 영향을 받기 때문에 높은 발전효율을 기대하기 힘들다. 제안하는 태양광 트랙커 시스템은 광 추적센서와 모터의 연동회로를 이용하여 최대의 태양광을 추적하기 때문에 고효율 운전이 가능하고 아날로그 소자들로만 구성되어 있기 때문에 수동소자만큼의 시스템 수명이 보장된다. 또한, CPU를 사용하지 않기 때문에 프로그램 오류로 인한 오작동이 없으며, 설치 이후 유지 및 보수가 간단하다. 제안하는 태양광 트랙커 시스템의 타당성은 1년 동안의 실증 실험 결과를 통해 검증하였다.