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A Study on the Reliability Evaluation and Rehabitation of Solar Insolation Data by Field Measurement in Korea  

Jo, Dok-Ki (Korea Institute of Energy Research)
Kang, Young-Heack (Korea Institute of Energy Research)
Publication Information
Journal of the Korean Solar Energy Society / v.25, no.3, 2005 , pp. 11-18 More about this Journal
Abstract
The Korea Institute of Energy Research(KIER) has begun collecting horizontal global 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 solar insolation 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 insolation 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.
Keywords
Clear-day Analysis; Horizontal Global Insolation;
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