U型伴热管输水管道对高寒地区冻土温度影响模拟  

Numerical Simulation Analysis of the Effect of U‑shaped Heat Tracing Water Pipeline on Permafrost Temperature in Alpine Region

作　　者：贾海锋 杨宝生 蔡汉成 杨晓明 赵俊光 付菊平 JIA Hai‑feng;YANG Bao‑sheng;CAI Han‑cheng;YANG Xiao‑ming;ZHAO Jun‑guang;FU Ju‑ping(China Railway Northwest Research Institute Co.Ltd.,Lanzhou 730000,China;China Railway Xinjiang Regional Engineering Construction Headquarters,Urumqi 830000,China;School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;China Railway Fourth Bureau Group Co.Ltd.,Hefei 230000,China)

机构地区：[1]中铁西北科学研究院有限公司,甘肃兰州730000 [2]中国中铁新疆区域工程建设指挥部,新疆乌鲁木齐830000 [3]兰州交通大学环境与市政工程学院,甘肃兰州730070 [4]中铁四局集团有限公司,安徽合肥230000

出　　处：《中国给水排水》2023年第11期49-55,共7页China Water & Wastewater

基　　金：中国中铁新疆区域工程建设指挥部科技研发项目(2019004)。

摘　　要：为了保证高寒地区分散居民埋地供水管道不冻结,防止周围冻土因管道散热而融化,造成埋地管道下沉损坏,使用U型管作为伴热管,考察其防冻保温效果。通过数值分析方法研究了U型伴热管对输水管和冻土层温度的影响。结果表明,U型伴热管伴热保温效果良好,在所研究的参数范围内,U型伴热管的进出口温差最大约为8℃,最小约为1℃。以管道长度为50 m和120 m的数值模拟数据为基础,通过U型伴热管去程和回程温差,预测U型伴热管出口处温度降到冰点以下时对应的输水管道长度分别为587 m和638 m。最后拟合得到了冻土层的最高温度关联式,通过此关联式可以获得不同的U型伴热管进口温度和进口流速的极限值,从而保证冻土层不被融化。In order to ensure that the buried water supply pipeline for scattered residents in alpine region does not freeze and to prevent the surrounding permafrost from melting due to heat dissipation of the pipeline and causing sinking damage to the buried pipeline,U‑type pipes were used as heat tracing pipes to investigate their anti‑freezing and heat preservation effects.Through the method of numerical analysis,the influence of U‑type heat tracing pipe on the temperature of water pipeline and permafrost layer was studied.The results showed that the U‑type heat tracing pipe had good effect of heat tracing and heat preservation;the maximum temperature difference between the import and export of the U‑type heat tracing pipe was about 8℃and the minimum was about 1℃in the range of the studied parameters.Based on numerical simulation data of pipe lengths of 50 m and 120 m,the corresponding supply pipe lengths were predicted to be 587 m and 638 m when the temperature at the outlet of U‑shaped heat tracing pipe dropped below freezing point,through the temperature difference between the inlet and outlet of U‑shaped heat tracing pipe.The maximum temperature correlation of the permafrost layer was obtained,and the limit values of the inlet temperature and the inlet flow rate of the U‑type heat tracing pipe could be obtained by this correlation.Thus,it could ensure that the permafrost layer would not be melted.

关 键 词：高寒地区 输水管道 U型伴热管 温度 

分 类 号：TU991[建筑科学—市政工程]