full2010.pdf - page 1438

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Data Analysis of Direct Solar Radiation in Nakhon Pathom
œ¼¦¢µ˜¸œ³®r ¥¸¤³Áµ³ 1* ¨³»ª·š¥r Á¡¦®oª¥¨¹ „2
Nurfatinah Yeemasoh1* and Suwit Phethuayluk2
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Abstact
In this study was analyted the direct solar radiation data in Nakhon Pathom province, with
three methods, such as the direct solar radiation from measured, calculation and simulation. The
direct solar radiation from the calculation and simulation were compared with the values measured
by pyrheliometer between January 2008 and December 2009. There has been determined that
deviation of 7-18 % from measured values. The higher of this deviation was found that on June and
November. Because, the two months are the joint of season change , summer to rainy and rainy to
winter, respectively. For the lower deviation was found that on March and April, which due to the
summer is the transparency sky season.
Keywords : Direct radiation, Global radiation, Diffuse radiation
1œ· ·˜ž¦·µ˜¦¸ µ µª·µ¢d ·„r ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥š´„¬·– ¡´š¨»Š 93110
Bachelor ’Degree Student in Physics, Faculty of science, Thaksin University, Phatthalung, 93110
*Corresponding author : Ú¦«´¡šr 087-8378732 E-mail :Nur_255@hotmail.com
2Ÿ«.,®o°Šž’·´˜·„µ¦¢d ·„rÁ·Š‡ªµ¤¦o °œ °Š—·œ µ µª·µ¢d ·„r ‡–³ª·š¥µ«µ˜¦r ¤®µª· š¥µ¨´¥š´„¬·– ¡´š¨»Š 93110