基于无限长圆柱热响应的岩土体热物性测试方法  

Method to determine soil thermo-physical parameters based on thermal response of infinite cylinder

作　　者：余延顺[1] 许磊[1] 陈水锋[1] 钱普华[1] 

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《南京理工大学学报》2013年第2期305-308,共4页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(50806034);江苏省"六大人才高峰"资助项目(07-A-015);南京理工大学自主科研项目(2010ZYTS047)

摘　　要：岩土的热物性参数是影响地源热泵系统设计与运行的重要因素。该文基于半无限大物体恒热流作用下的非稳态传热理论,通过引入形状修正系数得到恒热流作用下无限长圆柱体的热响应,数据处理获得岩土体导热系数与导温系数的表达式。应用该理论对扬州市某住宅建筑地源热泵系统地下岩土进行热响应测试,测得岩土的平均导热系数与导温系数分别为1.03 W/(m.℃)和0.231 mm2/s。实测数据与理论结果吻合良好。The soil thermo-physical parameters are important factors for the design and operation of the ground source heat pump system.Based on the unsteady heat transfer theory of the semi-infinite body with the constant heat flux,the thermal response of the infinite cylinder is presented by introducing a shape correction coefficient,and the expressions of the soil thermal conductivity and the thermal diffusivity are obtained by data processing.Applying the presented theory,a soil thermal response test of the ground source heat pump system is performed for a residential building located in Yangzhou city.The results show that the soil thermal conductivity and thermal diffusivity are 1.03 W/(m·℃)and 0.231 mm2/s respectively,and the theoretical results are in good agreement with the test.

关 键 词：地源热泵 热响应测试 土壤热物性参数 形状修正系数 

分 类 号：TU832.1[建筑科学—供热、供燃气、通风及空调工程]