济南市浅层岩土导热系数影响因素分析

doi:10.3976/j.issn.1002-4026.2019.03.016

Abstract

Abstract: The selection of thermal and physical parameters of rock and soil has obvious influence on the heat exchange efficiency of ground source heat pump system. According to test data of thermal properties of rock and soil samples from Jinan, the correlations between the lithology and thermal physical parameters such as thermal conductivity and specific heat capacity. The analysis showed that heat conductivities of rocks were generally higher than that of the Quaternary loose strata. Heat conductivities of rocks ranked from high to low as sedimentary rock，magmatic rock，metamorphic rock. The density, water content and porosity of limestone had significant effects on the thermal physical parameters. Lab measurements indicated heat conductivity of limestone increased linearly with the increase of its density, decreased linearly with increase of its moisture content or porosity. The formulas for estimating heat conductivity and thermal diffusivity with porosity as a single variable were obtained. This work should be instructive to the investigation, evaluation and development of shallow geothermal energy in Jinan.

Key words: shallow geothermal energy, thermalphysical properties, physical properties, influencing factors, Jinan

CLC Number:

P641.8

GAO Zhi-you, ZHU Xi, ZHANG Yong, WANG Wan- li, SUN Ming-yuan, ZHANG Qing-lian. Analysis of influencing factors on heat conductivities of shallow layer rock and soil in Jinan[J].Shandong Science, 2019, 32(3): 103-112.

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Analysis of influencing factors on heat conductivities of shallow layer rock and soil in Jinan

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