Method for exploiting geothermal energy and heat exchanger apparatus therefor

摘要

Geothermal energy in blind holes is used by a device comprising a closed circuit feed of heat transmission medium. In the heat exchanger tube is a first chamber for feed of cold heat transmission medium. A second chamber in the tube feeds away heated heat transmission medium. In a geothermally usable first area (16) the first chamber is arranged concentrically around the second. The first and second chambers are separated by a heat-insulating dividing wall, which in cross-section runs approximately along the diameter of the heat exchanger tube.