| 摘要 |
<p>An underground heat storage and supply system with a coil embedded in heat storage material (9) inside a vessel (1) as in the main patent, employs an inner coil (11) and an outer coil (12). These two coil sections are made from one tube, forming a continuous flow path. Both are connected to the user (3) and the energy source (2) by two sets of flow and return lines (4, 4.1 and 5, 5.1) interconnected by two pumps (6, 7). They are also controlled by two temperature dependent control valves (13, 14) so that the flow can be reversed. An alternative design uses two windings formed by one coil in close contact with another.</p> |
