Insulating tube for geothermal well intended to reduce the...

Details Insulating tube for geothermal well intended to reduce the... Insulating tube for geothermal well intended to reduce the...

F - Mech Eng,Light,Heat,Weapons

28

D

257/30

F28D 21/00 (2006.01)

Patent

CA 1187480

ABSTRACT OF THE DISCLOSURE The invention provides an apparatus for the recovery of geothermal energy. The apparatus comprises a first conduit which is inserted into a borehole in the ground so as to be in thermal contact therewith and a second conduit associated with the first conduit which is also inserted into the borehole. The second conduit is thermally insulated from the first conduit at least along the major portion of its length and the first and second conduits have upper ends providing respectively an inlet and outlet for a heat-transporting medium and lower ends which are closed to the borehole and in communication with each other to provide a closed path for the heat-transporting medium from the inlet to the outlet. The heat-transporting medium extracts heat from the ground during its passage down the first conduit and rises to the surface through the second conduit at least partly under the effect of the thermosiphon produced as a result of the heating of the heat-transporting medium during its passage down the first conduit.

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