Numerical Simulation of the General Insulation Material in the Application of Increasing Indoor Thermal Comfort

• Main Authors: Ming-Hsien Ting, 丁銘顯
• Other Authors: 呂良正
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/48778725342315137382

碩士 === 國立臺灣大學 === 土木工程學研究所 === 99 === The General Insulation Material, according to different thermal insulating mechanism, includes Insulation Material and Phase Change Material. Insulation Material due to its small thermal conductivity will retard the heat transfer process, so the objects remain at a fixed temperature range, or delays the effect caused by outdoor temperature to indoor temperature. Therefore, with smaller thermal conductivity the effect of retarding heat transfer will be better. Phase Change Material (PCM) will produce or release massive heat energy when processes phase change which is called latent heat. PCM can use the nature to reduce temperature oscillation amplitude or even achieve constant temperature. Therefore, these two kinds of material are widely used in engineering or building structure. Because of the effect of global warming, the electricity consumption in summer has been increasing rapidly. Therefore this research mainly discusses the general insulation material application to eliminate the thermal effect in building structures. Using commercial finite element software ABAQUS the model is simulated with well designed proper boundary condition. So, a 2D simplified model is constructed with windows, implemented to represent the physical space and to do the finite element analysis. First the effect of general insulation material applied to building in Taiwan’s climate is discussed. The effect is regarding to the Power Consumption Index (PCI), and Predicted Mean Vote Index (PMVI), defined in this thesis. Later the position of general insulation material, melting temperature of PCM and the position of different windows, in order to get the best effect of general insulation material is discussed. After knowing how to design general insulation material, the methods in references are modified to propose two thickness optimization design methods for general insulation material. One is an accurate method; the other is a simplified method. So, it can be predicted that how many thicknesses of general insulation material would be better to use in Taiwan. In addition, this research will discuss different types of climate, such as Sharurah, Saudi Arabia and Arcata, California, U.S.A. So, the effects of general insulation material can be compared with different types of climate and based on that some conclusions can be made. After that, two thickness optimization design methods are used to find the optimization thickness for general insulation material in these two different cities, and the results are compared with Taiwan.