Kristian Bär

TL;DR: In this article, the authors present a comprehensive environmental and economic life cycle assessment of a district heating system with varying shares of shallow to medium deep borehole thermal energy storage and alternative heat sources replacing conventional capacity.

TL;DR: In this article, more than 250 different numerical storage models are compared and the influence of the characteristic design parameters on the storage system's behavior and performance is analyzed by variation of parameters like borefield layout, fluid inlet temperatures and properties of the reservoir rocks.

TL;DR: In this article, a coupled geothermal-solarthermal case study in crystalline bedrock for an office building is presented and discussed, based on which a medium deep borehole thermal energy storage (MD-BTES) can be operated on temperature levels above 45°C.

TL;DR: In this paper, a data-based 3D structural model of the Upper Rhine Graben and its adjacent areas was constructed and compared to measured temperatures, showing that the regional thermal field is mainly controlled by the configuration of the upper crust, which has different thermal properties characteristic for the Variscan and Alpine domains.

TL;DR: In this paper, a comprehensive dataset detailing thermal conductivity and acoustic (compressional) wave velocity of 1430 oven-dry rock samples from clastic sedimentary (sandstone, arkose, greywacke), carbonatic (limestone, marl, dolomite, marble, coquina), plutonic (gabbro, gabbrodiorite, diorite and granodiorite), granite and volcanic (basalt, andesite, rhyolite) rock types is presented.