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http://dx.doi.org/10.7836/kses.2011.31.4.072

A Study on the Estimating Solar Radiation Using Hours of Bright Sunshine for the Installation of Photovoltaic System in Korea  

Jo, Dok-Ki (Korea Institute of Energy Research)
Yun, Chang-Yeol (Korea Institute of Energy Research)
Kim, Kwang-Deuk (Korea Institute of Energy Research)
Kang, Young-Heac (Korea Institute of Energy Research)
Publication Information
Journal of the Korean Solar Energy Society / v.31, no.4, 2011 , pp. 72-79 More about this Journal
Abstract
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.
Keywords
Solar Radiation; Global Radiation on Horizontal Surface; Hours of Bright Sunshine; Straight Line Regression Model;
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