Development of solar radiation models and maps of Thailand

Name: Krissanapong Kirtikara

Organization : King Mongkut' s Institute of Technology Thonburi. Faculty of Energy and Materials

keyword: Solar radiation

Abstract: The paper concerns the estimation of monthly average values of global solar radiation through the development of models relating the daily values of global radiation and sunshine hours for meteorological stations throughout Thailand. Regression coefficients relating the global radiation and sunshine hours at 7 meteorological stations, where both types of data have been collected, were obtained from polynomial regression analysis. It is then assumed that there exist relationships between these regression coefficients and the station latitude. The required coefficients at 33 meteorological stations were subsequently obtained by linear and parabolic interpolation and extrapolation using the established relationship of the 7 reference stations and constitute basic model parameters. Estimated values of global solar radiation at these 33 meteorological stations were calculated by making use of the acquired regression coeffictents and measured sunshine hour data. Radiation maps of Thailand were prepared from the estimated radiation values. To test the accuracy of the models measured radiation values of the year 1981 are compared with estimated values derived from the models using as inputs the corresponding measured sunshine hour data from the 7 reference stations. The differences in the monthly mean values of global radiation in most cases, 62 out of 84, are less than + 10%. Upon a yearly average basis, the difference is less than + 5% at all stations. This incidates that the models are acceptable. It is also concluded that the radiation maps of Thailand developed through this work adequately reflect the potential and availability of solar energy in various parts of Thailand

King Mongkut's University of Technology Thonburi. KMUTT Library

Address: BANGKOK

Email: info.lib@mail.kmutt.ac.th

Created: 1984

Modified: 2559-05-04

Issued: 2015-01-14

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BibliograpyCitation : KMITT Research and Development Journal vol. 7, no. 1 (Jun. 1984), p.81-89

CallNumber: 12002685

eng

©copyrights King Mongkut's University of Technology Thonburi

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