A device and method for measuring contact thermal resistance and thermal conductivity of saturated soft soil interface

Abstract

The invention discloses a saturated soft soil interface contact thermal resistance and thermal conductivity measurement device and method, belonging to the technical field of soil thermal resistance measurement, a saturated soft soil interface contact thermal resistance and thermal conductivity measurement device, including a metal detection head, temperature Detector and heating power supply, the present invention evenly arranges double-capsule water replenishers on the metal detection head. During the soil detection process, while the soil is heated, the heat will also heat and evaporate the water in the double-capsule water replenishers. The moisture also migrates away from the heat source, thus entering the soil, replenishing the gradually drying soil near the heat source, thereby reducing the variation of soil moisture content, improving the detection accuracy of soil thermal resistance and thermal conductivity, and, through comprehensive The detection value of whether the soil moisture is supplemented or not can detect the effect of water migration on the thermal resistance of the soil. At the same time, more accurate detection data can be calculated through data comparison.

Description

technical field [0001] The invention relates to the technical field of soil thermal resistance measurement, in particular to a device and method for measuring saturated soft soil interface contact thermal resistance and thermal conductivity. Background technique [0002] Thermal resistance is the resistance of heat conduction materials to heat flow conduction, and thermal conductivity reflects the heat conduction capacity of a substance per unit volume. In fact it reflects the inherent ability of matter to conduct heat. This ability is determined by the atomic or molecular structure of the substance. It is a parameter to evaluate the thermal conductivity between substances. The greater the thermal resistivity of a thermally conductive material, the stronger its resistance to heat conduction. [0003] Thermal resistance θ=L / (λS)——Wire (2) In the formula: λ is the thermal conductivity, L is the thickness or length of the material, and S is the heat transfer area. The objec...

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Problems solved by technology

[0005] However, when measuring soil thermal resistance on site, the migration of water vapor and the dissipation of soil heat will also affect the accuracy of the measurement. Due to the sudden heating process, water vapor will migrate from the heat source to the outside, which will cause heat in the vicinity of the heating source. The soil dries out and the soil moisture content changes. The measured result is the soil thermal resistance after the moisture content is reduced, so there is a large error between the measured thermal resistance value and the actual thermal resistance value of the soil.

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