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집광식 태양광발전시스템 설치를 위한 태양광자원 성분분석에 관한 연구
조덕기,강용혁,Jo, Dok-Ki,Kang, Young-Heack 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.2
Knowledge of the solar radiation components are essential for modeling many solar photovoltaic systems. This is particularly the case for applications that concentrate the incident energy to attain high photo-dynamic efficiency achievable only at the higher intensities. In order to estimate the performance of concentrating PV 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 PV system users or designers as well as by research institutes.
인공위성을 이용한 동북아시아 지역의 태양광자원 정밀조사 (중국지역 분석을 중심으로)
조덕기,강용혁,Jo, Dok-Ki,Kang, Young-Heack 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.3
Since the solar radiation is the main input for sizing any solar photovoltaic system, it will be necessary to understand and evaluate the solar radiation data. The works presented here is the analysis of solar radiation data for East-North Asia areas. The data utilized in the analysis consist of the global radiation on horizontal surface, measured at 2 different stations during 3 years for the period from 2002 to 2004 and estimated using satellite at 27 different stations over the China and Mongolia. Also the measured data has been collected at 16 different stations all of the South Korea and estimated using satellite at 12 different stations over the North Korea from 1982 to 2005. The Result of analysis shows that the annual-average daily global radiation on the horizontal surface is $3.57\;MJ/m^2$. We conclude, based on the analysis, that East-North Asia areas have sufficient solar energy resources for the photovoltaic power generation system.
PV시스템 설치를 위한 경사면 태양광에너지 분석에 관한 연구
조덕기,강용혁,Jo, Dok-Ki,Kang, Young-Heack 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.1
The amount of incident rays over inclination according to direction has been widely utilized as important data in installing photovoltaic systems. This is because the performance of the photovoltaic systems in much affected by angle and direction of incident rays. Recognizing that factors mentioned above are of importance, actual experiment on the moving route of the sun have been performed in this research to obtain the angle of inclination with which the maximum incident rays can be absorbed. After all, the standard for designing highly optimized photovoltaic systems will be provided for designers and employees working in the photovoltaic module related industries.
품질관리시스템을 활용한 태양에너지자원 신뢰성 향상에 관한 연구
조덕기,강용혁,Jo, Dok-Ki,Kang, Young-Heack 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.1
The Data quality management system(DQMS) organizes and helps manage and process time sequence data usually collected in monitoring networks and programs. DQMS places particular emphasis on data qualify while maintaining a highly organized and convenient structure for data. It operates with in a flexible and powerful commercial relational data base environment which can readily link to other software platforms from local spreadsheets to network server. The Korea Institute of Energy Research(KIER) has been solar radiation data since May, 1991 for 16 different locations. KIER's new data is expected to be extensively used by designer and researchers of solar systems in lieu of unreliable old ones. Unfortunately, the quality of the data has not always been properly mentioned. The purpose of this study is to systematically identify errors in such data set using DQMS in an effort to rehabilitate error-ridden old data. DET successfully uncovered solar radiation data that had questionable quality.
조덕기(Jo, Dok-Ki),강용혁(Kang, Young-Heak) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10
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 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 performed 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 thermal systems.
국내 태양광시스템 설치지역을 위한 일조시간에 의한 일사예측에 관한 연구
조덕기(Jo,Dok-Ki),윤창열(Yun,Chang-Yeol),김광득(Kim,Kwang-Deuk),강용혁(Kang,Young-Heack) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.4
Solar radiation data are the best source of information for estimating average incident radiation. Lacking this or data from nearby locations of similar climate, it is possible to use empirical relationships to estimate radiation from days of hours of bright sunshine. It is necessary to estimate the regression coefficients in order to predict the 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 16 different areas over Korea by estimating the regression coefficients taking into account hours of bright sunshine. Particularly. the proposed straight line regression model shows reliable results for estimating the global radiation on a horizontal surface with monthly average deviation of -0.2 to +0.5 % and each station annual average deviation of -1.6 to +1.7 % from measured values.
태양에너지 측정에 의한 한반도 주요 도시의 대기청명도 분석
조덕기(Jo, Dok-Ki),강용혁(Kang, Young-Heak) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10
The amount of incident solar rays on inclined surfaces with various directions has Since the atmospheric clearness index is main factor for evaluating atmosphere environment, it is necessary to estimate its characteristics all over the major cities in Korea Peninsula. We have begun collecting clearness index data since 1982 at 16 different cities in South Korea and estimated using empirical forecasting models at 12 different stations over the North Korea from 1982 to 2006. This considerable effort has been made for constructing a standard value from measured data at each city. The new clearness data for global-dimming analysis will be extensively used by evaluating atmospheric environment as well as by solar application system designer or users.
조덕기(Jo Dok-Ki),강용혁(Kang Young-Heack) 한국태양에너지학회 2009 한국태양에너지학회 논문집 Vol.29 No.4
Since the solar radiation is main input for sizing any solar photovoltaic system and solar thermal power system, it will be necessary to understand and evaluate the insolation data. The Korea Institute of Energy Research(KIER) has begun collecting horizontal global insolation data since May, 1982 and direct normal insolation data since December 1992 at 16 different locations. Because of a poor reliability of existing data, KIER's new data will be extensively used by solar energy system users as well as by research institutes. Among some significant results, the yearly avenlged horizontal global insolation was turned out 3.60 ㎾h/㎡/day and the yearly meo\Il 2.62 ㎾h/㎡/day of the direct normal insolation was evaluated for all days.
조덕기(Jo Dok-Ki),강용혁(Young-Heack) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.3
It is necessary to estimate empirical constants in order to predict the monthly mean daily global radiarion on a horizontal surface in the developing areas for alternative energy. 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 areas over Korea by calculating the regression models taking into account latirude, percentage of possible sunshine, and cloud cover. Results clearly demonstrates the reliability of the single linear equation for the estimation of global radiation, which is proposed by using percentage of possible sunshine method. When compared with the measured values, the average annual deviation falls between -3.1 to +0.6 %.