AI SearchSky luminance distribution patterns in tropical climate
Call Number: AIT Thesis no.ET-95-30 Material type:
TextSeries: Asian Institute of Technology. Thesis ; no. ET-95-30Publication details: Bangkok : Asian Institute of Technology, 1995Description: 107 leaves + 1 online resourceSubject(s): Online resources: Dissertation note: Thesis (M.Eng.) - Asian Institute of Technology, 1995 Summary: This study is aimed to display the sky luminance distribution patterns in tropical climates like Thailand with utilizing special designed measurement network and test the performance of the most recent developed model, from routine irradiance measurements, for describing the mean instantaneous sky luminance angular distribution patterns for all sky conditions from overcast to clear, through partly cloudy, skies. The analysis of mean instantaneous sky luminance distribution patterns shows that the predominant sky conditions in this tropical climate are partly cloudy skies. The delineation of the distribution patterns by using this model are special in line with the actual situation. The new model is able to predict the actual sky luminance in Thailand better than the CIE standard for most of the time. The assessment of the CIE standard algorithms shows poor performance with comparison to the new model. The analysis of illuminance on any surface shows that in clear and partly cloudy skies, there is a strong fluctuation of illumination level for different orientations of the plane, but in no circumstances in overcast skies. The variation of illuminance on those planes towards same direction, on the other hand, are considerable for all sky conditions for different plane elevation angles.
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22-AIT Thesis (Replacement)
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Asian Institute of Technology Library AIT Publications | AIT Thesis no.ET-95-30 (Browse shelf(Opens below)) | 3 | Available | 30050120742621 | |||||||||||||
40-Archives
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Asian Institute of Technology Library Archives | AIT Thesis no.ET-95-30 (Browse shelf(Opens below)) | Available | 30050120366694 |
A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering
Thesis (M.Eng.) - Asian Institute of Technology, 1995
This study is aimed to display the sky luminance distribution patterns in tropical climates like Thailand with utilizing special designed measurement network and test the performance of the most recent developed model, from routine irradiance measurements, for describing the mean instantaneous sky luminance angular distribution patterns for all sky conditions from overcast to clear, through partly cloudy, skies. The analysis of mean instantaneous sky luminance distribution patterns shows that the predominant sky conditions in this tropical climate are partly cloudy skies. The delineation of the distribution patterns by using this model are special in line with the actual situation. The new model is able to predict the actual sky luminance in Thailand better than the CIE standard for most of the time. The assessment of the CIE standard algorithms shows poor performance with comparison to the new model. The analysis of illuminance on any surface shows that in clear and partly cloudy skies, there is a strong fluctuation of illumination level for different orientations of the plane, but in no circumstances in overcast skies. The variation of illuminance on those planes towards same direction, on the other hand, are considerable for all sky conditions for different plane elevation angles.
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