| 20090084518 | PIPE AND SYSTEM FOR UTILIZING LOW-ENERGY - 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. | 04-02-2009 |
