Abstract: For high temperature steam vapor transport in the buried pipeline causes heat loss and leads to energy waste problems，several factors affecting heat loss were analyzed. Steam pipeline of physical model and mathematical model was established to simulate the different steam temperatures，different buried depth and temperature distribution under different insulation thickness. And temperature distribution pipeline and the surrounding soil were calculated and analyzed under different conditions. The results show that the heat loss of buried steam lines with the steam temperature, buried depth, changed the thickness of the insulating thickness changes，and the biggest affect of the heat loss was the insulation thickness. When the insulation thickness was from 40 mm to 80 mm，the heat loss per unit length declined 110.591 W/m，and the thermal effect was smaller and smaller .

Key words: Buried, Steam pipelines, Heat loss, Influence factors, Insulation

摘要：  针对高温蒸汽在埋地蒸汽管线中输送会造成热量损失最终导致能源浪费的问题, 分析了影响热损失的几个因素, 建立了蒸汽管线的物理模型和数学模型, 模拟了不同蒸汽温度、 不同埋地深度、 不同绝热层厚度下的温度场分布, 并对不同条件下管线及周边土壤的温度分布规律进行了计算分析。研究结果表明, 埋地蒸汽管线的热损失随蒸汽温度、 埋地深度、 绝热层厚度的变化而变化, 其中绝热层厚度对埋地管线的热损失影响最大, 绝热层厚度从4 0mm增加到8 0mm时, 单位长度管线热损失下降1 1 0. 5 9 1kW/m, 且对热损失的影响逐渐变小。

关键词: 埋地, 蒸汽管线, 热损失, 影响因素, 绝热层