土壤热导率测试系统研究

介绍了土壤热导率的测试方法,根据传热模型反解法设计了土壤热导率测试系统。结合工程实例,应用土壤热导率测试系统对北京某地区的土壤热导率进行了测试。测试系统采用的恒热流密度法可以获得最恶劣工况下土壤的热导率,从而确保了地源热泵的可靠性且测试误差较小,但恒热流密度法对电源的稳定性要求较高。

Study on Testing System of Soil Thermal Conductivity

The testing method of soil thermal conductivity is introduced.The testing system of soil thermal conductivity is designed according to the reverse solution of heat transfer model.Using the testing system of soil thermal conductivity,the soil thermal conductivity in a region of Beijing is tested with an engineering example.The soil thermal conductivity under the worst conditions can be obtained by the constant heat flow density method with the testing system,thus assuring the reliability of ground-source heat pump and a smaller test error,but the constant heat flow density method needs a higher stability of electric source.