地埋管换热器地温监测系统补建实例及测试数据分析  

Reconstruction case and test data analysis of a ground temperature monitoring system for a practical ground source heat pump system

作　　者：姚木申 蔡芸[1] 卢宝[1] 赵苏民[1] YAO Mushen;CAI Yun;LU Bao;ZHAO Sumin(Tianjin Geothermal Exploration and Design Institute,Tianjin 300250,China)

机构地区：[1]天津地热勘查开发设计院,天津300250

出　　处：《河北工业大学学报》2021年第2期55-59,共5页Journal of Hebei University of Technology

基　　金：天津市地热资源开发利用动态监测项目(0615-184118060647)。

摘　　要：针对天津市某地源热泵项目补建了一套地温监测系统,获得了各监测点温度变化数据,并进行了全年变化规律分析。结果表明,地温监测线在增加保护套管后,其短期变化负荷作用下的温度数值与换热管壁相比存在一个相对固定的偏差,通过必要的数据修正,并不影响地温监测的可靠性。热影响半径与土壤热物性和运行负荷强度密切相关,而本文运行条件下热影响半径在1~1.5 m之间。背景地温监测孔与换热孔群外边界的距离建议大于15 m,以减小孔群换热对数据的干扰。A ground temperature monitoring system is reconstructed for a practical ground source heat pump system in Tianjin.Annual variations of ground te mperatures at different positions and depths are obtained and analyzed.Test results show that after adding protection tubes for monitoring lines,their short-period temperatures under thermal loads obviously deviate from the temperatures at the pipe walls,but such a relatively fixed deviation does not affect the reliability of monitoring ground temperatures after some necessary data modification.Thermal influencing radius(TIR)of ground heat exchangers(GHEs)depends mainly on the ther mal properties of surrounding soils and the intensity of operating loads,and the TIR ranges from 1 to 1.5 m under the present operating conditions.It is recommended that the distance between the monitoring borehole of ground temperature and the outer boundary of heat exchange pipe groups should be greater than 15 m,in order to reduce the possible disturbance by the heat transfer of GHEs.

关 键 词：地源热泵 地温监测 热影响半径 背景地温 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]