The Analysis of Autoignition for Combustible Liquids

• Main Authors: Li-Chen Wang, 王儷禎
• Other Authors: San-Ping Ho
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/77492479639956988698

碩士 === 長榮大學 === 職業安全與衛生研究所 === 96 === Cone calorimeter is used to simulate the heat flux of light on the coating surface inside the accident tank. Different heat flux can be applied to obtain different ignition time and temperature on the fuel surface. The higher heat flux causes shorter ignition time and lower temperature because more heat can be maintained on the fuel surface with less heat transfer through the fuel depth. The vertical wind effect can cause turbulent on the fuel surface to lower the autoignition temperature from the cone calorimeter test. The lower power light is recommended to use in the interior finish of the tank. The autoignition of epoxy occurs when the diameter of the container is 6 cm, 7 cm, and 8 cm and the ambient temperature is 45 ℃ in the light heat test. The vapor concentration can not be ignited because it does not reach the explosive limit in smaller container. The heat flux is largest at the center of the light and is smaller in the edge of the light on the fuel surface of the container. The 8 cm container will take more time to ignite than 6 cm one because the vapor concentration can not reach the explosive limit uniformly on the fuel surface in epoxy tests. The diesel oil can be ignited in any size of the container because its lower flash point results in more vapors on the fuel surface to reach it explosive limit. The diesel oil is easy to ignite in the lager container than smaller container when it exposure under the light range. The flash point of the fuel, ambient temperature, and the container size will affect the autoignition of the combustible liquids.