Tunnel thermal
TunnelThermie is the registered trademark for the use of geothermal and waste heat in tunnels for heating and air-conditioning purposes in company-related systems or structures or in adjacent residential and industrial buildings. Structural components of the tunnel are used to generate energy. The use of warm tunnel water from the interior of the mountain can also be referred to as tunnel thermal energy. The name is derived from " tunnel " and " geothermal energy ", since the tunnel structure essentially uses geothermal energy . The term was first coined in 2000 when the first considerations about the use of this form of energy in Austria on the occasion of the planning for the construction of the Lainzer Tunnel in Vienna . Developed the system by the former HL-AG , the Technical University of Vienna consulenten, the engineering firm and the iC to the Wiener Stadtwerke belonging Energiecomfort .
In the meantime, several projects have already been implemented or are in progress.
Description of the technology
Tunnels activate a high level of low-thermal energy due to their large areas in contact with the ground or rock. Since these surfaces are mostly made of concrete, these surfaces can be thermally activated and used for heat exchange purposes by inserting plastic absorber pipes into the fresh concrete, through which a heat transfer medium later flows. For example, heat can be extracted from the warmer structure in winter or waste heat can be dissipated into the cooler structure in summer.