20.500.12556/DiRROS-15395 Evaluation of thermal conductivity estimation models with laboratory-measured thermal conductivities of sediments 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. thermal conductivity non-cohesive sediment cohesive sediment estimation model true false true Springer Nature Angleški jezik Ni določen Delo ni kategorizirano 2022-08-25 09:54:44 2022-08-25 10:07:42 2022-10-03 11:55:10 0000-00-00 00:00:00 2022 0 0 15 str. vol. 81 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-01-01 550.3 1866-6280 10.1007/s12665-022-10505-7 119122179 s12665-022-10505-7.pdf s12665-022-10505-7.pdf 1 816512924847356493496114014B4F17 886ed3d51465ee693b879ab0e57aa24c1e2f140ad69f83dd3ca7e25afd270e72 aa65c3db-244c-11ed-b6b8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20345 12665_2022_10505_MOESM1_ESM.docx 12665_2022_10505_MOESM1_ESM.docx 1 548804D0648723A13826EAB0F2A8A9B2 4bf828927cd1189d081034d08181ff997a2198262a1cfb5e016741e52e625a8c b8e7f4a4-244c-11ed-b6b8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20346 Geološki zavod Slovenije 0 0 0