长沙市某区浅层地埋管岩土体热响应试验性能研究  

Research on Thermal Response Test Performance of Shallow Buried Pipe Rock and Soil in a District of Changsha City

作　　者：韦启珍 周星志 陈贺伟 WEI Qizhen;ZHOU Xingzhi;CHEN Hewei(China Energy Engineering Group Hunan Electric Power Design Institute Co.,Ltd.,Changsha 410007,China)

机构地区：[1]中国能源建设集团湖南省电力设计院有限公司,湖南长沙410007

出　　处：《电力勘测设计》2024年第1期69-76,共8页Electric Power Survey & Design

摘　　要：长沙市某区为高新技术发展示范基地,能源冷热需求量大,该片区地质条件复杂,邻近少有地源热泵热响应测试数据,通过性能研究,揭露研究区地层以第四系覆盖层及元古界泥岩、砂岩、板岩为主,10~40 m存在上层少量上层滞水;通过线热源模型热响应试验,测试岩土体综合平均导热系数为1.78~1.95 W/(m·K),钻孔热阻值为0.18~0.23(m·K)/W,并与钻孔取芯和室内热物性测试进行对比,吻合度较好。考虑长沙地区气候特征,在不考虑大量钻孔换热过程中存在热干扰和长时间持续运行情况下,通过换热计算,夏季每延米换热量最大可达51~53 W/m,冬季每延米换热量最大取值为47~49 W/m。A district in Changsha City is a demonstration base for high-tech development.It needs a lot of heat and cold energy.The geological conditions in this area are complex,and there are few ground source heat pump thermal response test data nearby.Through this performance study,it is revealed that the stratum in this research area is dominated by Quaternary overburden and Proterozoic mudstone,sandstone,slate,and there is a small amount of perched water in the upper layer 10~40 m;Through the thermal response test of the linear heat source model,the comprehensive average thermal conductivity of rock and soil mass is 1.78~1.95 W/(m·K),and the borehole thermal resistance is 0.18~0.23 m·K/W,which is in good agreement with the borehole coring and indoor thermal physical property test.Considering the climate characteristics of Changsha,the operation load is balanced and stable in summer and winter.Without considering the thermal interference and long-term continuous operation in the heat transfer process of a large number of boreholes,the maximum heat transfer per linear meter in summer can reach 51~53 W/m,and the maximum heat transfer per linear meter in winter is 47~49 W/m.

关 键 词：地源热泵 岩土体热响应 热阻 热物性 

分 类 号：P642[天文地球—工程地质学]