【摘要】 以哈尔滨某直埋供热管段作为研究对象，采用Flow Simulation有限元分析软件建立直埋供热管道三维仿真模型，仿真模拟稳态工况下供、回水管单位长度热损失，研究室外温度、管顶覆土深度、水平间距(管道外表面)、保温层厚度对供、回水管单位长度热损失的影响。室外温度对供、回水管单位长度热损失影响显著。在满足直埋供热管道最小覆土深度要求的前提下，可适当减小管顶覆土深度以降低工程造价。当水平间距小于等于1.0 m时，水平间距对供、回水管单位长度热损失的影响均比较小。实际应用中，可以考虑供、回水管采用不同的保温层厚度，以降低工程造价。更多还原

【Abstract】 Taking a directly buried heating pipe section in Harbin as the research object, the three-dimensional simulation model of the directly buried heating pipeline is established by using Flow Simulation finite element analysis software to simulate the heat loss per unit length of supply and return water pipes under steady-state conditions and study the influence of outdoor temperature, pipe top soil covering depth, horizontal spacing(pipe outer surface),insulation layer thickness on the heat loss per unit length of supply and return water pipes. The outdoor temperature has a significant effect on the heat loss per unit length of water supply and return water pipes. On the premise of meeting the requirements for the minimum soil covering depth of directly buried heating pipeline, the pipe top soil covering depth can be appropriately reduced to reduce the project cost. When the horizontal spacing is less than or equal to 1.0 m, the influence of the horizontal spacing on the heat loss per unit length of the supply and return water pipes is relatively small. In practical application, different insulation layer thicknesses can be considered for water supply and return water pipes to reduce the project cost.更多还原