A plant for exploiting geothermal energy

Details A plant for exploiting geothermal energy A plant for exploiting geothermal energy

F - Mech Eng,Light,Heat,Weapons

24

J

F24J 3/08 (2006.01) E21B 43/17 (2006.01) E21B 43/30 (2006.01)

Patent

CA 2271301

A plant for exploiting geothermal energy by circulating water through a geological formation (1) at a substantial depth below the earth surface (2), comprises at least one supply hole (3) leading from the surface (2) down to said formation (1) and at least one return hole (4) for transporting heated water from the formation to the surface. The supply and return holes (3, 4) are interconnected by a plurality of heat absorbing holes (5) which are spaced more than 50 m apart. The heat absorbing holes (5) have a total length of many kilometres but a relatively small diameter in the order of 10 cm. A method for designing the plant involving determining the dimensions of the heat transfer holes (5) is also disclosed.

Cette invention concerne une installation permettant d'exploiter l'énergie géothermique grâce à l'eau qui circule à travers une formation géologique (1) et à une profondeur relativement importante sous la surface terrestre (2). Cette installation comprend au moins un trou d'alimentation (3) qui va de la surface (2) à ladite formation (1), et qui permet de transporter l'eau chauffée depuis ladite formation vers la surface. Des trous d'alimentation et de refoulement (3, 4) sont connectés entre eux par l'intermédiaire de plusieurs trous absorbant la chaleur (5), ces derniers étant disposés à plus de 50 mètres les uns des autres. Les trous absorbant la chaleur (5) ont une longueur totale de plusieurs kilomètres, mais un diamètre relativement réduit de l'ordre de 10 cm. Cette invention concerne également un procédé de construction de cette installation au cours duquel on calcule les dimensions des trous de transfert de chaleur (5).

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