| 摘要 |
<p>Geothermal collector comprising an input duct (10), an output duct (11), and a plurality of spaced tubes (12) having a cross-section smaller than the cross-section of the input duct (10) and the output duct, each of said tubes (12) being connected at its both ends to the input duct and the output duct (11), respectively. Said tubes are shaped as an "U" and are preferably made as a single piece. The connection of one tube to the input duct is provided with a hole effected on the input duct, the area of said hole being smaller than the area of the cross-section of said tube, in order to hinder the flow and induce turbulences inside the tube, though the same effect can be achieved by inserting obstacles along the tube.</p> |
