【摘要】 为分析新型中空无规共聚聚丙烯管保温性能,运用有限元法对新型中空无规共聚聚丙烯管在不同空气层厚度和常规管道包覆不同厚度保温材料的热损进行了计算。结果表明,新型中空无规共聚聚丙烯管保温效果比常规包覆式管道明显提高。常年运行工况下,年平均温度为15℃(昆明地区),管内工质温度95℃,管道热损不高于93W/m~2时,新型中空无规共聚聚丙烯管保温层(空气层+护管)厚度比常规管道包覆玻璃棉厚度减少27.5%,岩棉厚度减少32.9%。在季节运行工况下,平均温度为8℃(昆明地区冬季),管内流体温度95℃,管道热损不高于163 W/m~2时,新型中空无规共聚聚丙烯管保温层厚度比常规管道包覆玻璃棉厚度减少20%,比岩棉层厚度减少25.8%。更多还原

【Abstract】 In order to analyze the performance of new hollow polypropylene random insulation pipe,finite element method(FEM) is applied to calculate heat loss for new hollow insulation pipe and conventional pipe coated with insulation materials.The results show that the insulation performance of the new hollow insulation pipe is significantly improved compared with the conventional pipe coated with insulation materials. The insulation layer(air layer+protective tube) thickness of the new hollow insulation pipe is 27.5% less than the thickness of the conventional pipe coated with glass wool,and 32.9% less than its thickness of the conventional pipe coated with rock wool under perennial operating conditions with the annual average temperature 15 ℃(Kunming) and working fluid temperature 95 ℃ in the working pipe for the maximum heat loss 93 W/m~2. The insulation layer thickness of the new hollow polypropylene random insulation pipe is 20% less than the thickness of the conventional pipe coated with glass wool,and 25.8% less than its thickness of the conventional pipe coated with rock wool under seasonal operating conditions with an average temperature 8℃(Kunming winter) and working fluid temperature 95℃ for the maximum heat loss 163 W/m~2.更多还原