System for exchanging energy with a ground

Abstract

A system for exchanging energy with a ground is disclosed. In at least one embodiment, it includes an elongate ground bore, a flexible sealing device for separating sections of the bore and extending inside and generally all along the bore and being closed at its ends, wherein the flexible sealing device, in use, is filled with a liquid whereby the flexible sealing device is pressed against walls of the bore. The system further includes at least a first duct, and heat recovery device, wherein said the at least a first duct is operatively connected to the heat recovery device and extends into the flexible sealing device. At least one sealing device is provided at the flexible sealing device at a predefined level along the bore, which at least one sealing device is adapted to seal at the level between the flexible sealing device and the bore.

1 . A system for exchanging energy with a ground, comprising,
 an elongate ground bore;   a flexible sealing device for separating sections of said bore and extending inside and generally all along said bore and being closed at its ends, wherein said flexible sealing device, in use is filled with a liquid whereby said flexible sealing device is pressed against walls of said bore;   at least a first duct;   heat recovery device, wherein said first duct is operatively connected to said heat recovery device and extending into said sealing device; and   at least one sealing device provided at said flexible sealing device at a predefined level along said bore adapted to seal at said level between said flexible sealing device and said bore.   
     
     
         2 . A system for extracting energy according to  claim 1 , wherein said at least one sealing device comprises a collar, arranged within said flexible sealing device at said predefined level, the collar further being arranged and configured to exert a radial force against said bore. 
     
     
         3 . A system for extracting energy according to  claim 2 , wherein said collar is rigid and provided with material at its outer periphery which expands in contact with said liquid. 
     
     
         4 . A system for extracting energy according to  claim 3 , wherein the outer periphery of said rigid collar has includes a smaller diameter than the inner diameter of said flexible sealing device. 
     
     
         5 . A system for extracting energy according to  claims 1 , wherein said flexible sealing device ( 1 ) comprises a tubular plastic film. 
     
     
         6 . A system for extracting energy according to  claim 5 , wherein said tubular plastic film is composed of at least two film layers. 
     
     
         7 . A system for extracting energy according to  claims 1 , further comprising a second duct operatively connected to said heat recovery device and extending into said flexible sealing device. 
     
     
         8 . A system for extracting energy according to  claims 1 , wherein said at least a first duct includes a first and second duct each including a duct end which is open, the duct end of the first duct being located vertically below the duct end of the second duct. 
     
     
         9 . A system for extracting energy according to  claim 8 , wherein said first duct end is located in a general bottom third of said ground bore, and said second duct end is located in a general top third of said ground bore. 
     
     
         10 . A system for extracting energy according to  claim 8 , wherein said rigid collar is open for vertical flow of liquid. 
     
     
         11 . A system for extracting energy according to  claim 1 , wherein said at least a first duct includes a first and second duct, the first and second ducts being interconnected so as to form a continuous passage. 
     
     
         12 . A system for extracting energy according to  claim 11 , wherein said rigid collar is closed for vertical flow of liquid. 
     
     
         13 . A system for extracting energy according to  claim 1 , wherein the sealing device, at ground level, includes a mouth which is enclosed by a rigid tube of plastic material. 
     
     
         14 . A system for extracting energy according to  claim 12 , wherein the flexible sealing device, at ground level, includes a mouth which is closed by a sealing body. 
     
     
         15 . A system for extracting energy according to  claim 14 , wherein said sealing body is secured between a top of said rigid tube and said mouth of said flexible sealing device. 
     
     
         16 . A system for extracting energy according to  claim 15 , wherein said sealing body comprises a sealing ring secured to said top of said rigid tube, and a sealing lid, wherein said flexible sealing device is clamped between said sealing ring and sealing lid. 
     
     
         17 . A system for extracting energy according to  claim 1 , wherein said liquid is water. 
     
     
         18 . A system for extracting energy according to  claim 1 , wherein said flexible sealing device is made of non-rigid plastic. 
     
     
         19 . A system for extracting energy according to  claim 1 , wherein said flexible sealing device includes a thickness of 0.2-1.5 mm. 
     
     
         20 . A system for extracting energy according to  claim 1 , wherein said flexible sealing device includes a diameter which, in use corresponds substantially to the diameter of the bore. 
     
     
         21 . A system for extracting energy according to  claim 1 , wherein said first and a second ducts each is made of non-rigid plastic, 
     
     
         22 . A system for extracting energy according to  claim 1 , wherein said at least one sealing device comprises a jacket enclosing said flexible sealing device. 
     
     
         23 . A system for extracting energy according to  claim 22 , wherein said at least one sealing device comprises a collar, arranged within said flexible sealing device at said predefined level, the collar further being arranged and configured to exert a radial force against said bore and wherein said jacket is provided generally at the same level as said collar. 
     
     
         24 . A system for extracting energy according to  claim 22 , wherein said jacket is made of a material which expands in contact with water. 
     
     
         25 . A system for extracting energy according to  claim 22 , wherein said jacket is made of a rubber material. 
     
     
         26 . A system for extracting energy from a ground, comprising,
 an elongate ground bore;   a flexible sealing device for separating sections of said bore and extending inside and generally all along said bore and being closed at its bottom end, wherein said flexible sealing device, in use is filled with a liquid whereby said flexible sealing device is pressed against walls of said bore;   a first and a second duct; and   heat recovery device, wherein said first and second ducts are operatively connected to said heat recovery device and extending into said flexible sealing device, wherein each first and second duct has a duct end which is open, and wherein a duct end of the first duct is located vertically below the duct end of the second duct.   
     
     
         27 . A system for extracting energy according to  claim 9 , wherein said rigid collar is open for vertical flow of liquid. 
     
     
         28 . A system for extracting energy according to  claim 1 , wherein the sealing device, at ground level, includes a mouth which is closed by a sealing body. 
     
     
         29 . A system for extracting energy according to  claim 21 , wherein said first and a second ducts each is made of non-rigid plastic having a thickness of 0.2-1.5 mm. 
     
     
         30 . A system for extracting energy according to  claim 25 , wherein said jacket is made of a rubber material between 25 and 45 ° Sh.