20.500.12556/DiRROS-17639 Overview of the thermal properties of rocks and sediments in Slovenia Pregled toplotnih lastnosti kamnin in sedimentov v Sloveniji The use of geothermal energy, which comes from both deep geothermal systems and the shallow underground, has been developing rapidly in the last few decades. The purpose of the paper is to present the results of measurements of the thermal properties of all rock samples and sediments that were available from boreholes, two tunnels and numerous surface locations in Slovenia in the period from 1982 to the end of 2022. In relation to the shallow geothermal potential, a special effort is needed to characterize the thermal properties of the rocks and sediments and to implement thermal energy transfer technology. In this sense, knowledge of the thermal conductivity of rocks and sediments is required to assess the possibility of low-enthalpy heat exchange in a given local area. The largest number of measurements was taken to determine thermal conductivity. Determinations of thermal diffusivity were carried out on a much smaller number of rock and sediment samples, as well as determinations of radiogenic heat production in rocks. The results of thermal conductivity measurements on 430 samples from 119 wells, 20 samples from two tunnels and 156 samples from surface locations are shown. The highest thermal conductivities are shown by samples of dolomite, quartz conglomerate and conglomerate, phyllonite, quartz phyllite and gneiss, while the lowest are measured in sediments such as clay, lignite with clay, peat and dry sand. The determined radioactive heat generation is the lowest for milonitized dolomite and highest for dark grey sandstone with shale clasts. Our results are comparable to those already published worldwide, and they could be the basis for the possible future Slovenian standard for the thermal properties of measured rocks and sediments. Raba geotermalne energije, ki izhaja iz globokih geotermalnih sistemov kot tudi iz plitvega podzemlja, se v zadnjih nekaj desetletjih hitro razvija. Namen prispevka je prikazati rezultate meritev toplotnih lastnosti vseh vzorcev kamnin in sedimentov, ki so bili na voljo iz vrtin, dveh predorov in številnih površinskih lokacij v Sloveniji v obdobju od 1982 do konca 2022. V zvezi s plitvim geotermalnim potencialom je potrebno posebno prizadevanje za karakterizacijo toplotnih lastnosti tal in plitvega podtalja ter za izvedbo tehnologije prenosa toplotne energije. V tem smislu je potrebno poznavanje toplotne prevodnosti kamnin in tal za oceno možnosti izmenjave toplote z nizko entalpijo na določenem lokalnem območju. Številčno največ meritev je bilo za določitev toplotne prevodnosti. Določitve toplotne difuzivnosti so bile izvedene na precej manjšem številu vzorcev kamnin in sedimentov, prav tako določitve produkcije radiogene toplote v kamninah. Prikazani so rezultati meritev toplotne prevodnosti na 430 vzorcih iz 119 vrtin, na 20 vzorcih iz predorov in na 156 vzorcih iz površinskih lokacij. Najvišje toplotne prevodnosti kažejo vzorci dolomita, kremenovega konglomerata in konglomerata, filonita, kremenovega filita in gnajsa, najniže pa so izmerjene v sedimentih, kot so glina, lignit z glino, šota in suh pesek. Ugotovljena radiogena tvorba toplote je najmanjša pri milonitiziranem dolomitu in največja pri temno sivem peščenjaku s klasti skrilavega glinavca. Naši rezultati so primerljivi z že objavljenimi v svetu in lahko predstavljajo osnovo za morebitni bodoči slovenski standard toplotnih lastnosti merjenih kamnin in sedimentov. thermal conductivity thermal diffusivity borehole tunnel surface rock sediment radioactive heat generation Slovenia toplotna prevodnost toplotna difuzivnost vrtina predor površje kamnina sediment radiogena tvorba toplote Slovenija true false true Geološki zavod Slovenije Angleški jezik Slovenski jezik Neznano 2024-01-05 03:37:08 2024-01-15 10:19:42 2024-01-16 03:40:56 0000-00-00 00:00:00 2023 0 0 str. 125-150 no. 1 vol. 66 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2023-08-04 550.3 0016-7789 10.5474/geologija.2023.005 164613891 1852-Article_Text-12342454-6-10-20230928.pdf 1852-Article_Text-12342454-6-10-20230928.pdf 1 B155601E78EDBD6C050A7B23A1BDE298 d67a9a7678756e5a6a125fb846d68769b025ae8b88c7b24975d3898293b57070 82b57769-b387-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24152 1852-Article_Text-12342455-1-10-20230804.pdf 1852-Article_Text-12342455-1-10-20230804.pdf 1 A4A3B186523B7C2D05A9E70F828091F8 edd61ab3bb7b17b17a132f99b7f9b57817dcfdcbfcaa56f2f3aec123334efa40 a783b80b-b387-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24153 Geološki zavod Slovenije Geologija 0 0 0