人民黄河Issue(2)：114-116,3.DOI:10.3969/j.issn.1000-1379.2016.02.029
含水率对黏土及沙土导热系数的影响
Testing Study on Moisture Content Effect on Thermal Conductivity for Clay and Sand
摘要
Abstract
Thermal conductivity is one of the key influence factors of the heat exchange performance of Ground Coupled Heat Pump Systems (GCHP), which is effected significantly by soil moisture content around the ground heat exchanger system. The clay thermal conductivity under moisture content of 0%, 5%, 10%, 15%, 20%, 25% and 30%, as well as the sand thermal conductivity under moisture content of 0%, 5%, 10%, 15%, 20% and 25% were determined through thermal probe experiment. The results show that a variation with three phases of the thermal conductivity changes with clay moisture content, that firstly, the thermal conductivity increases slowly with a moisture content of 0%⁃5%, secondly, which sharply increases with a high positive linear correlation when the moisture content is 5%⁃25%, then the growth tendency is slow even begins to fall. The variation of sand is similar with that of clay, while the linear growth period is 5%⁃20%. Therefore, the soil thermal conductivity increases with a certain range of water moisture. It can be deduced that better thermal performance of GCHP is able to be obtained in the area with strong water abundance. Besides, the correlation equations of the second phases are fitted.关键词
土壤源热泵/导热系数/含水率/热探针法Key words
Ground-Coupled Heat Pump System/thermal conductivity/moisture content/thermal probe method分类
建筑与水利引用本文复制引用
段妍,晋华,郑强..含水率对黏土及沙土导热系数的影响[J].人民黄河,2016,(2):114-116,3.基金项目
国家自然科学基金资助项目（41372247）。 （）
