地下水对地埋管换热器换热性能的影响分析  

Analysis of groundwater flow affecting the thermal performance of ground heat exchangers

作　　者：于孝民[1] 杨春光[1] 金路[1] 顾吉浩[2] 

机构地区：[1]河北省地矿局第二地质大队,河北唐山063000 [2]河北工业大学能源与环境工程学院,天津300401

出　　处：《河北工业大学学报》2012年第3期64-67,共4页Journal of Hebei University of Technology

基　　金：天津市应用基础及前沿技术研究计划(10JCYBJC08500)

摘　　要：在唐山地区测试了3组不同含水层条件下的地埋管换热器动态换热特性,初步获得了单位井深换热量随地下水流动状况的定量变化规律.结果表明,地下水流动会不同程度影响热响应试验结果.随着地下水流速增大,钻孔附近岩土的平均导热系数会呈增大趋势.随着地埋管换热器与地下水接触长度的增加,钻孔平均导热系数呈增大趋势,同时单位井深换热量也呈明显增加趋势,这对于减小富水性较强地区地埋管换热器系统的建设成本具有实际的应用价值.Groundwater flow is a major factor that affects the thermal performance of ground borehole exchangers（BHEs）.In-situ thermal tests were performed for three groups of BHEs in different aquifers in Tangshan,and the dynamic heat transfer rates of BHEs per depth varying with the groundwater flow parameters were obtained.Test results showed that with the increase of the vertical depth of BHEs that contact the groundwater,both the effective thermal conductivity of boreholes and the heat transfer rate of BHEs appeared to be a growing tendency.The present work can provide a useful guideline for the design of BHEs in those areas with abundant aquifers.

关 键 词：地源热泵 地埋管换热器 地下水流动 传热性能 

分 类 号：TU834.1[建筑科学—供热、供燃气、通风及空调工程]