• 한국태양에너지학회 논문집
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• 제25권1호
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• pp.11-18
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• 2005

Since the direct normal insolation is a main factor for designing any solar thermal power system, it is necessary to evaluate its characteristics all over the country. We have begun collecting direct normal insolation data since December 1990 at 16 different locations and considerable effort has been made for constructing a standard value from measured data at each station. KIER(Korea Institute of Energy Research's new data will be extensively used by solar thermal concentrating system users or designers as well as by research institutes. From the results, we can conclude that 1) Yearly mean $5.4kWh/m^2/day$ of the direct normal insolation was evaluated for clear day all over 16 areas in Korea. 2) Clear day's direct normal insolation of spring and summer were $5.53kWh/m^2/day$ and $5.84kWh/m^2/day$, and for fall and winter their values were $5.3kWh/m^2/day$ and $4.94kWh/m^2/day$ respectively. So, spring and summer were higher, and fall and winter were lower than the yearly mean value.

• 한국태양에너지학회 논문집
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• 제24권2호
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• pp.83-88
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• 2004

Since the solar radiation is the main input for sizing any solar photovoltaic 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 at 16 different locations. Because of a poor reliability of existing data, KIER's new data will be extensively used by solar photovoltaic system users as well as by research institutes From the results, we can conclude that 1) The yearly averaged horizontal global insolation of Korea was turned out $3.57kWh/m^2.day$ in the periods of $1982\sim2001$. 2) Horizontal global insolation of spring and summer was respectively 24 % and 21 % higher than the yearly average value, and that of fall and winter was respectively 12 % and 34 % lower than the yearly average value.

• 한국인터넷방송통신학회논문지
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• 제20권5호
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• pp.157-162
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• 2020

기존의 태양광발전장치 중에서 반사판을 갖춘 장치는 태양에너지(일사량)를 태양광 모듈 표면에 집중적으로 입사되는 방식이지만 태양광 모듈을 통해 다시 반사되어 손실되는 태양에너지(일사량)는 고려되지 않는 구조로 되어있다. 또한, 태양광 모듈 주위에 반사판을 설치하여 발전량을 높이는 방안이 제시되고 있지만, 이는 다른 태양광 모듈의 음영에 따른 발전 저하에 영향을 주고 있다. 따라서 이러한 문제점을 개선하고자 본 논문에서는 1) 음영에 따른 태양광 모듈의 발전에 영향을 주지 않으면서 2) 태양광 모듈에서 반사되어 손실되는 태양에너지(일사량)를 회전하는 반사판을 이용하여 태양광 모듈에 다시 입사되는 방법을 연구 및 제안한다. 따라서 손실된 태양에너지(일사량)의 무수한 반사 각도에 따른 태양에너지를 재활용할 수 있는 방법을 통해 태양에너지(일사량)에 대한 손실을 최소화, 동일 일사량에 대한 발전량을 최대화하므로 태양광발전장치의 발전량을 증가시킬 수 있다.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 춘계학술발표대회 논문집
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• pp.209-214
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• 2008

Since the direct normal insolation is a main factor for designing any solar thermal power system, it is necessary to evaluate its characteristics all over the country. We have begun collecting direct normal insolation data since December 1992 at 16 different locations and considerable effort has been made for constructing a standard value from measured data at each station. KIER(Korea Institute of Energy Research)'s new data will be extensively used by solar thermal concentrating system users or designers as well as by research institutes. From the results, we can conclude that 1) Yearly mean 2.67 kWh/$m^2$/day of the direct normal insolation was evaluated for all days all over the 16 areas in Korea. 2) All day's direct normal insolation of spring and summer were 2.91 kWh/$m^2$/day and 2.23 kWh/$m^2$/day, and for fall and winter their values were 2.78 kWh/$m^2$/day and 2.77 kWh/$m^2$/day respectively. So, spring, fall and winter were higher, and summer was lower than the yearly mean value

• 한국태양에너지학회 논문집
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• 제28권1호
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• pp.51-56
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• 2008

Since the direct normal insolation is a main factor for designing any solar thermal power system, it is necessary to evaluate its characteristics all over the country. We have begun collecting direct normal insolation data since December 1992 at 16 different locations and considerable effort has been made for constructing a standard value from measured data at each station. KIER(Korea Institute of Energy Research)'s new data will be extensively used by solar thermal concentrating system users or designers as well as by research institutes. From the results, we can conclude that 1) Yearly mean $2.67\;kWh/m^2/day$ of the direct normal insolation was evaluated for all days all over the 16 areas in Korea. 2) All day's direct normal insolation of spring and summer were $2.91\;kWh/m^2/day$ and $2.23\;kWHm^2/day$, and for fall and winter their values were $2.78\;kWh/m^2/day$ and $2.77\;kWh/m^2/day$ respectively. So, spring, fall and winter were higher, and summer was lower than the yearly mean value.

• 태양에너지
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• 제20권2호
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• pp.19-30
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• 2000

Since the solar radiation is the main input for sizing any solar system, it will be necessary to understand and evaluate the insolation data. The Korea Institute of Energy Research(KIER) has began collecting horizontal global insolation data since May, 1982 at 16 different locations. Because of a poor reliability of existing data, KIER's new data will be extensively used by solar system users as well as by research institutes. From the results, we can conclude that 1) The yearly averaged horizontal global insolation of Korea was turned out $3,042kcal/m^2.day$ in the periods of $1982\sim1999$. 2) Horizontal global insolation of spring and summer were 24 % and 21 %, higher than the yearly average value, respectively, and for fall and winter, their values were 12 % and 34 % lower than the yearly average value, respectively.

• Journal of Astronomy and Space Sciences
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• 제35권1호
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• pp.47-54
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• 2018

Moon mineralogy mapper ($M^3$)'s work proved that the moon is not completely dry but has some hydroxyl/water. $M^{3{\prime}}s$ data confirmed that the amount of hydroxyl on the lunar surface is inversely related to the measured signal brightness, suggesting the lunar surface is sensitive to temperature by solar insolation. We tested the effect of solar insolation on the local distribution of hydroxyl by using $M^3$ data, and we found that most craters had more hydroxyl in shade areas than in sunlit areas. This means that the local distribution of hydroxyl is absolutely influenced by the amount of sunshine. We investigated the factors affecting differences in hydroxyl; we found that the higher the latitude, the larger the difference during daytime. We also measured the pyroxene content and found that pyroxene affects the amount of hydroxyl, but it does not affect the difference in hydroxyl between sunlit and shaded areas. Therefore, we confirmed that solar insolation plays a significant role in the local distribution of hydroxyl, regardless of surface composition.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 1999년도 Proceedings of International Symposium on Remote Sensing
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• pp.227-230
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• 1999

Surface solar radiation over the sea is estimated using Visible and Infrared Spin Scan Radiometer data onbord Geostationary Meteorological Satellite(GMS) 5 for January, 1997 to December 1997 in clear and cloudy conditions. The hourly insolation is estimated with a spatial resolution of 5$\times$ 5 km grid. The island pyranometer belonging to the Japan Meteorological Agency is used for validation of the estimated insolation. It is shown that the estimated hourly insolation has RMSE(root mean square) error of 104 W/$m^2$. The variability of the hourly solar radiation was investigated on 3 areas over seas around Korean Peninsula. The solar radiation of East Sea is similar to Yellow Sea. The maximum value of solar radiation is on June of year. The maximum value in south sea is on August because weather is poor by low pressure and front in June

• 태양에너지
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• 제6권1호
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• pp.70-76
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• 1986

Since the solar radiation is the main input for sizing any solar system, it will be necessary to understand and evaluate the insolation data. The Korea Institute of Energy and Resources (KIER) has began collecting horizontal insolation data since May, 1982 at 15 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. Among some significant results, we obtained the good results more than we had expected, it is very encouraging that the mean value of Korea's solar radiation is increased by more than 30%.

• 정보과학회 컴퓨팅의 실제 논문지
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• 제23권11호
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• pp.632-640
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• 2017

일사량은 태양광 발전시스템의 전력 생산량에 가장 큰 영향을 미치는 기상요소이며, 다른 기상요소들과 달리 기상청의 일기예보를 통해 제공받을 수 없다. 따라서 효율적인 태양광 발전시스템 운용을 위해 일사량 예측에 관한 연구는 필수적이다. 본 연구는 기상정보 데이터 기반의 Dynamic Piecewise 일사량 예측 모델을 제안한다. Dynamic Piecewise 일사량 예측 모델은 유사한 태양고도와 유사한 날씨의 데이터 조각들로 나누어 학습하기 위해, 예측하는 시점의 태양고도와 운량을 기준으로 전체 데이터를 동적으로 나눈 후 기계학습 알고리즘인 다중 선형회귀 알고리즘으로 학습하여 일사량을 예측하는데 사용된다. 본 연구의 성능을 검증하기 위해 제안 모델인 Dynamic Piecewise 일사량 예측 모델과 이전 연구에서 제안한 모델, 기존의 상관관계식 기반 일사량 예측 모델에 동일한 기상정보 데이터 셋을 적용하여 비교하였으며, 비교결과 본 연구에서 제안한 모델이 가장 정확한 일사량 예측 성능을 보였다.