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국내의 시간에 따른 수평면전일사량 상관식 제안 및 정확성 평가(Ⅰ)
김하양(Ha-Yang Kim),김정배(Jeongbae Kim) 한국신재생에너지학회 2016 신재생에너지 Vol.12 No.S2
Recently, several studies have been conducted to show how the horizontal global solar radiation in Korea can be predicted using the Zhang-Huang (ZH) model proposed in 2002 for China. Previous results showed that that Cloud-cover Radiation Model (CRM) is unsuitable for Korea. Therefore, this study first corrected the coefficients of the ZH model to make it applicable to Korea and showed that ZH fitted model could make a prediction. This work added a term with the duration of sunshine as being closely related to the hourly solar radiation in Korea into the ZH model. Finally, this study proposed a new model to predict the hourly and daily total solar radiation for all regions, various seasons, and various weather conditions, including overcast and clear, with higher accuracy and lower error than other models proposed in Korea.
2012년 기상관측 결과와 한국형 수평면전일사량 예측식(I)
김하양(Kim Ha-Yang),김정배(Kim Jeongbae) 한국태양에너지학회 2016 한국태양에너지학회 논문집 Vol.36 No.1
To well design the solar energy system, the correlation to calculate and predict solar irradiation is basically needed. So, this study was performed to reveal the relationships between the solar irradiation and four meteorological observation data(dry-bulb temperature, relative humidity, duration of sunshine, and amount of cloud) that didn"t show from previous any other researches. And then, we finally proposed the various order non-linear correlation from the measured solar irradiation and four meteorological measurement data using MINITAB. To show the deviation and accuracy of the solar irradiation between measured and calculated, this study compared for the daily total solar insolation. From those results, the calculation error could well predicted about maximum 97% for the daily total solar insolation. But, the coefficients of the proposed correlations didn"t show any relationships. So, needs more studies to make the proper one correlation for the country.
식물의 성장과 열화상카메라로 측정된 열적 특성과의 연관성 분석
박상미(Park Sang-Mi),남다현(Nam Da-Hyun),김지형(Kim Ji-Hyung),조건영(Jo Geon-Young),김하양(Kim Ha-Yang),김정배(Kim Jeongbae) 한국태양에너지학회 2016 한국태양에너지학회 논문집 Vol.36 No.2
This study was experimentally performed to analyze the growth characteristics of a plant(wax tree or privet) using the surface temperature measured from thermal images captured using a thermal camera with water and cider. To do that, this study measured every each 12 hours the surface temperature and the stem temperature of leaves attached to the plant sample until the plants wilt on summer season in the laboratory room. From the experimental results, this study revealed that the temperature of front and back of the leaves is a little different due to the pore. The mean surface temperature of a leaf in cider is 0.52℃ higher than that of a leaf in water. The phenomena that the leaves of plants fall could be also demonstrated using the surface temperature. Before a leaf is falling from the tree, the temperature of the stem is lowered about 2℃ than those of other parts in a leaf. This result can be validated from previous result performed in University of Wisconsin.