Pipe and system for utilizing low-energy

Abstract

A system for utilizing low energy includes a terminal, a heating circuit and a ground circuit, wherein heat bound to a medium circulating in the ground circuit is transferred with the terminal, such as a ground heat pump, to the heating circuit. The ground circuit is implemented with an inner pipe and outer pipe surrounding it in such a way that the outer end of the outer pipe is closed, wherein, depending on the flow direction, the medium can move at the end of the pipe from the inner pipe to the outer pipe and vice versa. Further, a pipe for utilizing low energy is provided.

1 - 13 . (canceled) 
   
   
       14 . A pipe for utilizing low energy, comprising recess portions ( 220 ) extending inwardly at an outer periphery of the pipe ( 20 ),
 the recess portions ( 220 ) being open over a portion of the outer periphery in such a way that heat energy is transferred in the pipe between a mediating medium conveyed in the pipe and a substance surrounding the pipe both from the outer periphery of the pipe ( 20 ) and through walls ( 222 ) of the recess portions ( 220 ) positioned closer to an axis of revolution of the pipe, and a locating wall ( 221 ) closest to the axis of revolution of the recess portion ( 220 ) functioning as a member determining a position of an inner pipe ( 10 ) arrangeable inside the pipe ( 20 ), wherein the pipe ( 20 ) comprises at least three recess portions ( 220 ), between which are walls ( 223 ) in such a way that a center part of the pipe ( 20 ) forms the inner pipe ( 10 ).   
   
   
       15 . The pipe according to  claim 14 , wherein the pipe ( 20 ) comprises an inner pipe ( 10 ) and outer pipe portions ( 200 ) separated from each other by the recess portions ( 220 ). 
   
   
       16 . The pipe according to  claim 14 , wherein the recess portions ( 220 ) in the pipe ( 20 ) are in a thread-like manner in a longitudinal direction of the pipe. 
   
   
       17 . The pipe according to  claim 14 , wherein a wall thickness of the recess portions ( 220 ) is smaller than a wall thickness of outer portions of the pipe. 
   
   
       18 . The pipe according to  claim 14 , wherein the recess portions ( 220 ) in the pipe ( 20 ) have a substantially U shape. 
   
   
       19 . A system for utilizing low energy, comprising a terminal ( 3 ) and a ground circuit, having a pipe system with circulating mediating medium to which low energy is bound, the low energy being utilized by the terminal ( 3 ), wherein the ground circuit is implemented with an inner pipe ( 10 ) and an outer pipe ( 20 ) surrounding it in such a way that an outer end of the outer pipe ( 20 ) is closed, wherein depending on the flow direction, the mediating medium moves at the end of the outer pipe from the inner pipe ( 10 ) to the outer pipe ( 20 ) or vice versa, wherein an outer periphery of the outer pipe ( 20 ) comprises recess portions ( 220 ) extending inwardly, the recess portion ( 220 ) being open over a portion of the outer periphery in such a way that heat energy is transferred between the mediating medium conveyed in the outer pipe ( 20 ) and a substance surrounding the outer pipe both from the outer periphery and through walls of the recess portion ( 220 ) positioned closer to an axis of revolution of the outer pipe, and wherein a locating wall ( 221 ) closest to an axis of revolution of the recess portions ( 220 ) functions as a member determining a position of the inner pipe ( 10 ) arranged inside the outer pipe, wherein the outer pipe ( 20 ) comprises at least three recess portions ( 220 ), between which are walls ( 223 ) in such a way a center part of the outer pipe ( 20 ) forms the inner pipe ( 10 ). 
   
   
       20 . The system according to  claim 19 , wherein the outer pipe ( 20 ) comprises the inner pipe and outer pipe portions ( 200 ) separated from each other by the recess portions ( 220 ). 
   
   
       21 . The system according to  claim 20 , wherein the outer pipe having the inner pipe ( 10 ) and outer pipe portions ( 200 ) is directed downwardly from a horizontal plane. 
   
   
       22 . The system according to  claim 19 , wherein the ground circuit further comprises a main pipe system connected to the terminal, and two or more outer pipes having the inner pipe ( 10 ) and outer pipe portions ( 200 ) are joined to the main pipe system. 
   
   
       23 . The system according to  claim 19 , wherein the system further comprises main pipe systems ( 1000 ,  2000 ), to which the inner pipes ( 10 ) and outer pipe portions ( 200 ) are joined via distribution tanks ( 80 ) and connections ( 81 ).