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Method to Estimate Thermal Conductivity of Subsurface Media

机译：估计地下介质的导热系数的方法

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摘要

Thermal conductivity is an essential parameter in heat transfer models including soil-water systems. Herein, an Internet of Things (IoT) tool and a computational method are advanced for vertically resolving in situ thermal conductivity values in soil-groundwater systems. A demonstrative application of this approach at a former petroleum refinery is presented. A line heat source is co-located with a vertical string of in situ temperature sensors. Five-minute multiple level temperature data were collected before, during, and after a 100-min long heating period. Vertically distributed temperature data are transformed into vertically discretized thermal conductivity values using an analytical solution. Results fall in the range of thermal conductivity values reported in the literature. Specifically, estimated thermal conductivity values from 0.3 to 7.3 m below ground surface range between 0.7 and 5.4 (W/m/C) with the highest values occurring in media with greater water content. Overall, the advanced method in this study provides a pragmatic approach for vertically resolving subsurface thermal conductivity values applicable for many scientific disciplines.
机译：导热系数是传热模型中的必要参数，包括土壤水系统。这里，用于垂直地解析土壤 - 地下水系统中的原位热导率值，提前了一种物联网（IOT）工具和计算方法。提出了这种方法在前石油炼油厂的证明应用。线路热源共同位于原位温度传感器的垂直串。在100分钟的长加热时段之前，期间和之后收集五分钟的多级温度数据。垂直分布的温度数据使用分析解决方案转换为垂直离散的导热性值。结果落入文献中报道的热导率值范围。具体地，估计的导热率值低于地面范围的0.7-5.4（w / m / c），其介质中具有较高的水含量的最高值。总的来说，本研究的先进方法提供了垂直解决适用于许多科学学科的地下导热率值的务实方法。

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  • 来源
    《Ground Water Monitoring & Remediation》 |2021年第1期|99-105|共7页
  • 作者

    Karimi Askarani Kayvan; Gallo Sam; Kirkman Andrew J.; Sale Tom C.;

  • 作者单位

    Colorado State Univ Dept Civil & Environm Engn 1320 Campus Delivery B09 Ft Collins CO 80523 USA|Colorado State Univ 1320 Campus Delivery B09 Ft Collins CO 80523 USA;

    Colorado State Univ 307 Univ Ave Ft Collins CO 80523 USA;

    BP Corporate Campus 150W Warrenville Rd Naperville IL 60563 USA;

    Colorado State Univ Dept Civil & Environm Engn 1320 Campus Delivery B09 Ft Collins CO 80523 USA|Colorado State Univ Ctr Contaminant Hydrol 1320 Campus Delivery Ft Collins CO 80523 USA;

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