| Summary: | 碩士 === 淡江大學 === 建築學系 === 87 === Designing any type of buildings, there are two important things to be calculated-- one is the gain of heat and the other is amount of natural light. When we calculate, we need to use the data of "solar radiation" and "daylight illuminace" to be our reference. My project is focus on the statistics of quantifying diffuse daylight and solar radiation in northern Taiwan. First, I measure the data of solar radiation and quantifying diffuse daylight to build the data bank. Second, I deduce the regression models of solar radiation and diffuse daylight. Finally, I predict formulas of solar radiation & diffuse daylight.
Since my project is the research of "solar radiation" and "quantifying diffuse daylight", the instruments of the experiment need to put in a place without any cover at all time. For this reason, I choose the roof of the highest building at Tamkang University. I''ve recorded the data every hour ever day in a row and in any kind of weather for thirteen months.
These are the results coming from 3 ways of analyses:
1.About the range of radiation energy, I use the linear equation between solar radiation and duration of sunshine that was founded by Prescott in 1940 to regress the equation of solar radiation and duration of sunshine of northern Taiwan. Qg/Qa=0.1836+0.5854(n/N)
2.In the part of "quantifying diffuse daylight", via the special designed experiment, I use the relative position between sun and five illuminators, and trigonometric function of solid geometry to find the direct and diffuse daylight.
The model of clean day: Ed-cr=60.232SinAt-16.614
The model of cloudy day: Ed-cd=54.009SinAt-22.849
The model of partly-cloudy day: Ed-pc=50.268SinAt-3.8814
3.According to NBC&NOAA''s condition of sky, I sort out the data of "solar radiation" and "quantifying diffuse daylight". There are three conditions: fine day, cloudy day, and half-cloudy day. Also I make use of two-dimension and three-dimension regressive equations to deduce the dynamic model of direct and diffuse daylight.
According to the measurement of solar radiation and quantifying diffuse daylight and the quotation of theoretical model, I provide the result of regional solar radiation and quantifying diffuse daylight that we can refer in architectural design. I hope that it can help the study of heat insulation, natural light, energy-saving in architectural area.
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