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Measuring of Thermal Conductivities of Soils and Rocks to Be Used in the Calculation of A Geothermal Installation

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  • Cristina Sáez Blázquez

    (Department of Cartographic and Land Engineering, University of Salamanca, Higher Polytechnic School of Avila, Hornos Caleros 50, 05003 Avila, Spain)

  • Arturo Farfán Martín

    (Department of Cartographic and Land Engineering, University of Salamanca, Higher Polytechnic School of Avila, Hornos Caleros 50, 05003 Avila, Spain)

  • Ignacio Martín Nieto

    (Department of Cartographic and Land Engineering, University of Salamanca, Higher Polytechnic School of Avila, Hornos Caleros 50, 05003 Avila, Spain)

  • Diego Gonzalez-Aguilera

    (Department of Cartographic and Land Engineering, University of Salamanca, Higher Polytechnic School of Avila, Hornos Caleros 50, 05003 Avila, Spain)

Abstract

The thermal conductivity of soils and rocks constitutes an important property for the design of geothermal energy foundations and borehole heat exchange systems. Therefore, it is interesting to find new alternatives to define this parameter involved in the calculation of very low enthalpy geothermal installations. This work presents the development of an experimental set-up for measurements of thermal conductivity of soils and rocks. The device was designed based on the principle of the Guarded Hot Plate method using as heat source a laboratory heater. The thermal conductivity of thirteen rocky and soil samples was experimentally measured. Results are finally compared with the most common thermal conductivity values for each material. In summary, the aim of the present research is suggesting a procedure to determine the thermal conductivity parameter by a simple and economic way. Thus, increases of the final price of these systems that techniques such as the “Thermal Response Test” (TRT) involvs, could be avoided. Calculations with software “Earth Energy Designer” (EED) highlighted the importance of knowing the thermal conductivity of the surrounding ground of these geothermal systems.

Suggested Citation

  • Cristina Sáez Blázquez & Arturo Farfán Martín & Ignacio Martín Nieto & Diego Gonzalez-Aguilera, 2017. "Measuring of Thermal Conductivities of Soils and Rocks to Be Used in the Calculation of A Geothermal Installation," Energies, MDPI, vol. 10(6), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:6:p:795-:d:101084
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    References listed on IDEAS

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    1. Blázquez, Cristina Sáez & Martín, Arturo Farfán & García, Pedro Carrasco & Sánchez Pérez, Luis Santiago & del Caso, Sara Jiménez, 2016. "Analysis of the process of design of a geothermal installation," Renewable Energy, Elsevier, vol. 89(C), pages 188-199.
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    Cited by:

    1. Franz Zach & Florian Kretschmer & Gernot Stoeglehner, 2019. "Integrating Energy Demand and Local Renewable Energy Sources in Smart Urban Development Zones: New Options for Climate-Friendly Resilient Urban Planning," Energies, MDPI, vol. 12(19), pages 1-28, September.
    2. Ignacio Martín Nieto & Cristina Sáez Blázquez & Arturo Farfán Martín & Diego González-Aguilera, 2020. "Analysis of the Influence of Reducing the Duration of a Thermal Response Test in a Water-Filled Geothermal Borehole Located in Spain," Energies, MDPI, vol. 13(24), pages 1-19, December.
    3. Luo, Jin & Qiao, Yu & Xiang, Wei & Rohn, Joachim, 2020. "Measurements and analysis of the thermal properties of a sedimentary succession in Yangtze plate in China," Renewable Energy, Elsevier, vol. 147(P2), pages 2708-2723.
    4. Pavel Neuberger & Radomír Adamovský, 2017. "Analysis of the Potential of Low-Temperature Heat Pump Energy Sources," Energies, MDPI, vol. 10(11), pages 1-14, November.
    5. Jiaming Wang & Hailong He & Miles Dyck & Jialong Lv, 2020. "A Review and Evaluation of Predictive Models for Thermal Conductivity of Sands at Full Water Content Range," Energies, MDPI, vol. 13(5), pages 1-15, March.
    6. Cristina Sáez Blázquez & Laura Piedelobo & Jesús Fernández-Hernández & Ignacio Martín Nieto & Arturo Farfán Martín & Susana Lagüela & Diego González-Aguilera, 2020. "Novel Experimental Device to Monitor the Ground Thermal Exchange in a Borehole Heat Exchanger," Energies, MDPI, vol. 13(5), pages 1-22, March.
    7. Cristina Sáez Blázquez & Arturo Farfán Martín & Ignacio Martín Nieto & Diego González-Aguilera, 2018. "Economic and Environmental Analysis of Different District Heating Systems Aided by Geothermal Energy," Energies, MDPI, vol. 11(5), pages 1-17, May.

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