地源热泵地埋管换热器热响应测试分析  

Analysis of Thermal Response Test for Borehole Heat Exchangers of Ground Source Heat Pump System

作　　者：李慧星[1] 李国柱[1] 陈其针[1] 付永亮[1] 张剑[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2011年第5期931-935,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家十二五科技支撑计划(2011BAJ05B02)

摘　　要：目的获得可靠的岩土综合导热系数,为地源热泵地埋管换热器提供正确的设计参数.方法以沈阳近郊低山丘陵地区某地源热泵工程为例,基于岩土热响应的原理,建立了现场测试岩土导热系数的方法,阐述了热响应测试的理论基础,利用线热源模型分析和计算了测试数据.结果该低山丘陵地区的岩土具有较好的导热能力,两处测井的岩土导热系数分别为2.12 W/(m.K)和2.33 W/(m.K);与推荐的相似岩土导热系数比较显示,测试结果在合理范围.结论岩土导热系数是正确设计地埋管换热器的先决条件,现场岩土热响应测试可以获得可靠的岩土综合导热系数;经过分析计算,测试地点的岩土综合导热系数为2.23 W/(m.K),具有良好的热传导能力;测试和分析方法可为相似工程提供应用借鉴.The paper aims to measure a reliable ground thermal conductivity to provide a basic parameter for proper designs of borehole heat exchangers. Taking a Ground Source Heat Pump （GSHP） project which is constructed in a hilly region of Shenyang suburbs as an example, based on the principle of soil thermal re- sponses, the research sets up an in-situ testing method for the ground thermal conductivity, and reviews the theory behind the thermal response test. Moreover, it analyses and calculates the test data using the line- source model. The results show that this hilly region has a better heat capacity, and the ground thermal con- ductivity of the two pilot boreholes are 2. 12 W/（m-K） and 2. 33 W/（ m. K）. Compared with the recom- mend values of similar rock-soil, test results indicate that the test values are reliable. The ground thermal con- ductivity is a prerequisite for correct designs of borehole heat exchangers. The in-situ thermal response test can obtain a reliable ground thermal conductivity. The average ground thermal conductivity of the test site is 2.23 W/（m-K）. Based on the thermal response test for borehole heat exchangers of GSHP in the hilly re- gion, this research provides a reference for similar practices.

关 键 词：地源热泵系统 地埋管换热器 热响应测试 导热系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK529[动力工程及工程热物理—热能工程]