caa a22 4500 60545454X CHVBK 20210128100207.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s10064-014-0701-x doi (NATIONALLICENCE)springer-10.1007/s10064-014-0701-x Thermal conductivity map of the Oslo region based on thermal diffusivity measurements of rock core samples [Elektronische Daten] [Randi Ramstad, Kirsti Midttømme, Heiko Liebel, Bjørn Frengstad, Bjørn Willemoes-Wissing] A thermal conductivity map can serve as a good basis for ground-source heat pump projects in the pre-design phase. However, due to large variations, a thermal response test is required for larger projects to get the accurate values needed for proper design of the ground-source heat pump system. This study describes the systematic methodology for producing such a thermal conductivity map of a larger geographic area around Oslo, Norway. The map is based on the results of 1,398 thermal diffusivity measurements of rock core samples. The thermal diffusivity is measured and used in the calculation of the thermal conductivity of the different geological units in the bedrock map of the Oslo region. Large variations in thermal conductivity data were registered within the data sets for the different rock polygons and geological units and the greatest variation is found in metamorphic and sedimentary rocks. Rock polygons and geological units with magmatic origin show the least variation within the data sets. The internal micro structures of the rocks can have a strong influence on the thermal conductivity. This is pronounced in some foliated metamorphic rocks where the thermal conductivity is highest parallel to the orientation of the foliation. The median value for the whole data set is 2.62W/(mK), while the minimum and maximum value is 1.0 and 6.88W/(mK), respectively. The minimum value is a breccia, and the maximum value was measured in a quartzite/metasandstone. The lower and upper quartiles for the sets of rock polygons and geological units are 2.1-3.9W/(mK), respectively. Springer-Verlag Berlin Heidelberg, 2014 Thermal conductivity nationallicence Thermal diffusivity nationallicence Thermal conductivity map nationallicence Rock samples nationallicence Oslo region nationallicence Ground-source heat nationallicence Ramstad Randi Department of Geology and Mineral Resources Engineering, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway aut Midttømme Kirsti Christian Michelsen Research AS, P.O.Box 6031, NO-5892, Bergen, Norway aut Liebel Heiko Department of Geology and Mineral Resources Engineering, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway aut Frengstad Bjørn Geological Survey of Norway (NGU), NO-7491, Trondheim, Norway aut Willemoes-Wissing Bjørn Geological Survey of Norway (NGU), NO-7491, Trondheim, Norway aut Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/4(2015-11-01), 1275-1286 1435-9529 74:4<1275 2015 74 10064 https://doi.org/10.1007/s10064-014-0701-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10064-014-0701-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ramstad Randi Department of Geology and Mineral Resources Engineering, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway aut NATIONALLICENCE 700 1- Midttømme Kirsti Christian Michelsen Research AS, P.O.Box 6031, NO-5892, Bergen, Norway aut NATIONALLICENCE 700 1- Liebel Heiko Department of Geology and Mineral Resources Engineering, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway aut NATIONALLICENCE 700 1- Frengstad Bjørn Geological Survey of Norway (NGU), NO-7491, Trondheim, Norway aut NATIONALLICENCE 700 1- Willemoes-Wissing Bjørn Geological Survey of Norway (NGU), NO-7491, Trondheim, Norway aut NATIONALLICENCE 773 0- Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/4(2015-11-01), 1275-1286 1435-9529 74:4<1275 2015 74 10064