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Title:Evaluation of thermal conductivity estimation models with laboratory-measured thermal conductivities of sediments
Authors:ID Adrinek, Simona (Author)
ID Singh, Rao Martand (Author)
ID Janža, Mitja (Author)
ID Żeruń, Mateusz (Author)
ID Ryżyński, Grzegorz (Author)
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Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo GeoZS - Geological Survey of Slovenia
Abstract:Thermal conductivity is one of the key parameters for estimating low-temperature geothermal potential. In addition to field techniques, it can be determined based on physical parameters of the sediment measured in the laboratory. Following the methodology for cohesive and non-cohesive sample preparation, laboratory measurements were carried out on 30 samples of sediments. Density, porosity and water content of samples were measured and used in thermal conductivity estimation models (TCEM). The bulk thermal conductivity (λb) calculated with six TCEMs was compared with the measured λb to evaluate the predictive capacity of the analytical methods used. The results show that the empirical TCEMs are suitable to predict the λb of the analysed sediment types, with the standard deviation of the residuals (RMSE) ranging from 0.11 to 0.35 Wm−1 K−1. To improve the fit, this study provides a new modified parameterisation of two empirical TCEMs (Kersten and Côté&Konrad model) and, therefore, suggests the most suitable TCEMs for specific sample conditions. The RMSE ranges from 0.11 to 0.29 Wm−1 K−1. Mixing TCEM showed an RMSE of up to 2.00 Wm−1 K−1, meaning they are not suitable for predicting sediment λb. The study provides an insight into the analytical determination of thermal conductivity based on the physical properties of sediments. The results can help to estimate the low-temperature geothermal potential more quickly and easily and promote the sustainable use of this renewable energy source, which has applications in environmental and engineering science.
Keywords:thermal conductivity, non-cohesive sediment, cohesive sediment, estimation model
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2022
Publisher:Springer Nature
Year of publishing:2022
Number of pages:15 str.
Numbering:vol. 81
PID:20.500.12556/DiRROS-15395 New window
UDC:550.3
ISSN on article:1866-6280
DOI:10.1007/s12665-022-10505-7 New window
COBISS.SI-ID:119122179 New window
Publication date in DiRROS:25.08.2022
Views:1204
Downloads:511
Metadata:XML DC-XML DC-RDF
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ADRINEK, Simona, SINGH, Rao Martand, JANŽA, Mitja, ŻERUŃ, Mateusz and RYŻYŃSKI, Grzegorz, 2022, Evaluation of thermal conductivity estimation models with laboratory-measured thermal conductivities of sediments. Environmental earth sciences [online]. 2022. Vol. 81. [Accessed 4 April 2025]. DOI 10.1007/s12665-022-10505-7. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=15395
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Record is a part of a journal

Title:Environmental earth sciences
Publisher:Springer Nature
Year of publishing:2022
ISSN:1866-6280

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0020
Name:Podzemne vode in geokemija

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:18.07.2022

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