โปรแกรมคอมพิวเตอร์เพื่อคาดการณ์ปริมาณแสงธรรมชาติโดยใช้ข้อมูลสภาพท้องฟ้าในภูมิอากาศแบบร้อนชื้น / กมล เกียรติเรืองกมลา = Computer program for daylight prediction using tropical sky data / Kamol Keatruangkamala
In the past, the levels of the illumination from daylight is predicted from experiment using the physical model. Since procedure is complicated. It waste time and money. Therefore, this research has proposed to determine a technique to predict levels of daylight in building. A user-friendly computer program has been developed to serve this purpose. The output of this program presents the illumination on horizontal plane at any required points. It’s moreover, basically analyzed the proper level of artificial light required and calculates extra cost from using the artificial light to offset the insufficient daylight. The studying process started from indentifying advantages and disadvantages of each technique of daylight prediction in buildings. As a result, two appropriate techniques has been selected. These provide the most accurate result as well as the simplicity of use selected. The first one is base on The Lumen Method. This approach is considered to be very simple to predict the illumination. However, it is quite weak to predict the illumination from complex building which include the top lighting. The second is The Sky Factor Method. It can accurately predict the illumination from side lighting but it requires complicated input and calculating procedure. Consequently, in order to satisfy the requirement of general use from various sources of daylight to use for complex building, the technique used in this research employs both calculation. To verify the accuracy of the computer simulation. A physical model was built and illumination levels inside a model was measured and compare which the value predicted from the computer simulation. The result from the computer simulation correlate very well with the physical model. This prove to be accuracy and demonstrate the applicability of the computer simulation. In conclusion many shapes and forms of room character were studied in order to prove the applicability of the proposed technique. It realized at the end of this study. The method used in this research is very powerful tool for general used. However, the light source from the sky is a crucial factor and careful investigation for the accurate result.
