U型埋管系统地下传热数值模拟  

Numerical Simulation of Heat Transfer of Soil Around U-Tube Undergroud Heat Exchanger

作　　者：张于峰[1] 陈成敏[1] 聂金哲[1] 周小珠[1,2] 胡晓微[1] 马洪亭[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]钦州学院物理与电子工程系,钦州535000

出　　处：《天津大学学报》2010年第8期717-721,共5页Journal of Tianjin University(Science and Technology)

基　　金：国家"十一五"科技支撑计划资助项目(2006BAJ04B04);国家科技支撑计划资助项目(2008BAJ12B03)

摘　　要：采用柱热源模型,建立了无限大区域内U型换热器与土壤间非稳态传热的二维数学模型.以天津地区的U型垂直埋管实验得到的数据作为参数,利用FLUENT软件进行模拟,得出该地区土壤源热泵间歇运行6年的土壤温度分布规律:距离地埋管最近的1,m点其变化速度最快、幅度最大;随着典型点与U管的距离增加,其变化速度及幅度都将减小;距离地埋管最远的7 m点其温度几乎不受热泵系统运行的影响,始终维持在初始温度14.5,℃左右.A two-dimensional unsteady conduction model of heat transfer between a U-tube heat exchanger and the soil in an infinite zone was established by employing the column heat reservoir model.The data obtained from a U-tube performance experiment conducted in Tianjin were used as input,and the temperature distribution of six-year soil in the same area was simulated by FLUENT software.The temperature of the nearest point,which is 1 m away from the pipe,drops the fastest in velocity and greatest in amplitude.The velocity and amplitude decrease as the dis-tance between the typical point and the U-tube increases.The temperature of the farthest point,which is 7 m away from the pipe,is free from the impact of the heat exchanger,remaining at the initial temperature of about 14.5 ℃.

关 键 词：U型埋管换热器 土壤源热泵 数值模拟 

分 类 号：X57[环境科学与工程—环境工程]