管道多层反射结构保温性能影响因素分析

Analysis of Influencing Factors of Thermal Insulation Performance for Pipe Multilayer Reflective Structure

文中建立了管道多层反射保温结构传热模型,并对保温性能影响因素进行了分析。以超细高温玻璃棉为反射屏间隔保温材料,加入反射屏后,保温结构外表面温度及散热损失均降低。在200℃时,DN200管道添加3层反射屏相对于无反射结构减少了17.5%的散热损失。当反射屏层数相同时,管道温度越高,反射保温结构的节能效果越明显。在100℃时,反射结构的节能率小于10%。300℃时,节能可达35%以上。在相同温度下,随着反射屏层数的增加,节能效果越好,但是存在一个最佳的经济层数。

The heat transfer model of the multi⁃layer reflective insulation structure of the pipeline was established,and its thermal insulation performance influencing factors were analyzed.Using ultra⁃fine high⁃temperature glass wool as the insulation material for the reflective screen interval,after adding the reflective screen,the temperature of the outer surface of the insulation structure and the heat dissipation loss were reduced.At 200℃,the addition of three reflective panels in DN200 pipeline reduced the heat dissipation loss by 17.5%compared with the non⁃reflective structure.When the number of reflective screen layers is the same,the higher the pipe temperature,the more obvious the energy⁃saving effect of the reflective insulation structure is.The en⁃ergy saving rate of the reflective structure is less than 10%at 100℃.At 300℃,the energy saving can reach more than 35%.At the same temperature,as the number of reflective screens increases,the energy⁃saving effect is better.But there is an optimal number of economic layers.