• 한국태양에너지학회 논문집
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• 제21권3호
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• pp.19-24
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• 2001

The amount of incident solar rays on inclined surfaces with various directions has been widely utilized as important data in installing solar collector, hot water system, and photovoltaic module, and designing solar buildings and house. This is because the performance of the solar energy applied systems is much affected by angle and direction of incident rays. Recognizing those factors mentioned above are of importance, actual experiment has been peformed in this research to obtain the angle of inclination with which the maximum incident rays can be absorbed. The results obtained in this research could be used in designing optimal solar systems.

• 태양에너지
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• 제8권1호
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• pp.107-121
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• 1988

The Korea Institute of Energy and Resources (KIER) has begun collecting horizental insolation data since May, 1982 at different locations. Because of a poor reliability of existing data, KIER's new data will be extensively used by the solar system users as well as by research institutes. But, the quality of the solar radiation data is not always good. This reports on an attempt to identify systematic error in such data using clear-day analysis for data rehabilitation. Clear-day analysis is successful in uncovering solar radiation data of questionable quality. It is not proven that rehabilitation process can improve the quality of data for daily or monthly means but it is suggested that the method can be used to improve the quality of data for monthly means of several years for use in many applications of solar energy planning. Earlier studies finding a maximum ETR of about 0.80 are confirmed.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2018년도 추계학술대회
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• pp.139-140
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• 2018

등부표는 태양광발전을 이용한 독립형 전력계통시스템으로 일사량과 표면온도에 의한 태양광 발전효율 저하에 따른 등명기 소등 또는 광력 미약으로 항로표지에 대한 신뢰성 확보에 대한 문제점이 발생하고 있다. 일부 항로표지용 고효율 충방전조절기 제품이 개발되고 있으나 "항로표지 장비 용품 표준화 규정"의 항로표지용 충방전조절기 표준규격(제3조3호)이 제정고시 되어 충방전조절기의 기능 및 성능개선을 추진할 필요가 있다. 본 연구에서는 개정된 충방전조절기의 표준규격의 성능을 만족하고 상용화가 가능한 구조기술을 개발하였다.

• 한국태양에너지학회 논문집
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• 제21권1호
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• pp.43-49
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• 2001

Informations of the solar radiation component are essential for modeling various solar energy systems. These Informations are particularly used for middle and high temperature applications, those need concentrating direct normal insolation. In order to estimate the performance of concentrating systems, it is necessary to know the intensity of the beam radiation, as only this component can be concentrated. The Korea Institute of Energy Research(KIER) has began collecting solar radiation component data since August, 1996. KIER's component data will be extensively used by concentrating system users or designers as well as by research institutes.

• 태양에너지
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• 제20권3호
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• pp.21-30
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• 2000

It is necessary to estimate the regression coefficients in order to predict the monthly mean daily global radiation on a horizontal surface. Therefore many different equations have proposed to evaluate them for certain areas. In this work, a new correlation has been made to predict the solar radiation for any area over Korea by estimating the regression coefficients taking into account percentage of possible sunshine, and cloud cover. Particularly, the multiple linear regression model proposed shows reliable results for estimating the global radiation with average deviation of -1 to 3 % from the measured values.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2012년도 전력전자학술대회 논문집
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• pp.93-94
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• 2012

본 논문에서는 태양광 모듈 집적형 전력변환장치 (Photovoltaic Module Integrated Converter, PV MIC)를 구동하기 위한 제어 시퀀스를 분석하고 이를 구현한다. 이를 위해 Cascade Buck-Boost Converter Topology를 채택하였고, 이를 기반으로 일사조건에 따른 최대 전력점 추종을 위해 PV MIC의 동작 모드를 결정하는 제어 시퀀스를 제안한다. 실제 PV Module을 연결한 PV MIC의 구동 실험을 통하여 제안한 제어 시퀀스를 검증한다.

• 한국태양에너지학회 논문집
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• 제30권2호
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• pp.33-38
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• 2010

The perimeter zone is space which receives a significant effect of ambient condition, it is necessary to improve the thermal performance in order to building energy saving. For this reason, a lot of study about the active approach is being performed, such as perimeter-less air conditioning system. But the performance of the perimeter zone is necessary to improve, through the passive approach. Therefore, the purpose of this study is to provide basic materials of energy-saving design of perimeter zone, based of the PAL that simulation changing the thickness of insulation and the rate of windows.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2020년도 추계학술발표대회
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• pp.583-584
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• 2020

본 논문은 신재생에너지와 전기자동차의 보급이 활발한 제주시에서 태양광 발전량과 기후변화 기록들을 활용할 수 있는 데이터처리 프레임워크를 구축하고 인공신경망으로 태양광 발전량 예측모델을 구축한다. 이 인공신경망 모델은 일조시간, 일사량, 전운량 등을 입력 노드로 설정하고 일별 생산량을 출력 노드로 설정한다. 가장 상관관계가 높은 발전기 3개에서 학습 패턴을 추출하였으며, 모든 대상 발전기에 대해 최대 평균 오류율은 평균 36.7 %를 보이고 있다.

• 한국태양에너지학회 논문집
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• 제25권1호
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• pp.45-55
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• 2005

In the summer, the irradiated solar heat gain through the roof has an effect on the thermal environment of the top floor units of apartment houses. This paper investigated the differences of the indoor air temperature, globe temperature and thermal comfort index between the top floor unit and the middle floor unit by measuring them at the sample units on the condition that all the openings of the units are opened. The purpose of this paper is to provide quantitative data about the irradiated solar heat gain during the summertime through the roof of an apartment house and these data to be the source to reevaluate the appropriate roof insulation efficiency. From this study, we obtained three brief results as follows. Indoor air temperature difference between the two sample units shifts a day. Indoor air temperature at the top floor unit is $0{\sim}1.8^{\circ}C$ higher than that of the middle floor unit from 12:00 p.m. to 12:00 a.m. and $0{\sim}2.8^{\circ}C$ lower from 12:00 a.m. to 12:00 p.m. The evaluation of the indoor thermal comfort index and the globe temperature shows similar results as the indoor air temperature measuring. Results of this experiment verified the actual existence of indoor air temperature difference between the top floor unit and the middle one and this difference comes from the heat storage of the roof.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 추계학술발표대회 논문집
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• pp.90-95
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• 2008

An SHGC(Solar Heat Gain Coefficient) is a determinant of total flux of solar radiation coming indoor and a critical factor in evaluating heating and cooling load. U-value represents heat loss while SHGC denominates heat gain. Recently, windows with high solar gain, mid solar gain or low solar gain are being produced with the development of Low-E coating technology. This study evaluated changes in energy consumption for heating and cooling according to changes in SHGC when using double-layered Low-E glass and triple layered Low-E glass in relation to double layered clear glass as base glass. An Office was chosen for the evaluation. For deriving optical properties of each window, WINDOW 5 by LBNL, an U.S. based company. and the results were analyzed to evaluate performance of heat and cooling energy on anannual basis using ESP-r, an energy interpretation program. Compared to the energy consumption of the double layered clear glass, the double layered Low-E glass with high solar gain consumed $69.5kWh/m^2,yr$, 9% more than the double layered clear glass in cooling energy. The one with mid solar gain consumed $63.1kWh/m^2,yr$, 1% less than the base glass while the one with low solar gain consumed $57.6kWh/m^2,yr$, 10% less than the base glass. When it comes to tripled layered glass, the ones with high solar showed 2% of increase respectively while the one with mid solar gain and low solar gain resulted 5% and 11% in decrease in energy consumption due to low acquisition of solar radiation. With respect to cooling energy. it was found that the lower the SHGC. the less energy consumption becomes.