Soil Thermal Response Test And Study On The Distribution Of The Thermal Conductivity In Handan-Xingtai Area

Ground source heat pump has been actively promoting and application at homeand abroad because of its advantages such as energy saving, high efficiency,preventing pollution and environmental friendly etc. The theory knowledge has beengradually added and extended in the process of the application for the ground sourceheat pump, it lays a solid foundation for its reasonable utilization. For aground-source heat pump project, it is very important for its prophase is able toaccurately design, because the design errors will cause a large deviation for theproject funds and the effect.This paper firstly introduces the hydrological and geological condition of theHandan and Xingtai region, then makes a test for the engineering examples on thesoil thermal response testing apparatus which made by our own. Based on thestandard requirements that conform to, the first generation of testing apparatus’working principle and structure are introduced, also the second generation of testinginstrument’ improvement were discussed. In the situation of the tester meet therequirements, we calculate and fitting the parameters applying of the traditional linesource model and the least square method to get the soil thermal propertiesparameters. The article has analyzed of the trend of the data and graph and gottencertain conclusions.At one time in the past, we have tested some different points in Handan-Xingtaiarea, and calculated the coefficient of thermal conductivity. To the different results indifferent locations, the paper analyzed and compared some factors in theHandan-Xingtai area such as the distribution of underground rock soil, distributionof groundwater and the climate which has an effect on the groundwater, then drew aconclusion. To the influence factors in the test system such as experimental time,velocity, the depth of the well, backfill and so on, this paper made a briefintroduction.On the basis of a large number of instances, the article summarizes thecoefficient of thermal conductivity in the area. In order to be able to find thedistribution of the coefficient of thermal conductivity in Handan-Xingtai area, andmakes the size of it can be found in this area. Thus, it can avoid the repetition of theexperiment for the different projects in the same area, also provide reference andsave a lot of money and time for the design and construction of the project, further to provide conditions for promoting the ground source heat pump in this area. Thispaper summarizes the distribution of the rock and soil thermal conductivity frompoint to area in Handan-Xingtai area, so the sudden increase or drop phenomenon ofrock and soil thermal conductivity caused by other individual factors can not beexcluded.