| 摘要 |
PURPOSE:To enable reasonable design and installation of a heat accumulator system to be realized by a method wherein the rate of effective heat flow corresponding to the conditions such as the configuration of heat exchanger and the depth where it is buried underground is obtained and a point which saturates the point where the change rate of the value of the effective heat flow rate increases is utilized. CONSTITUTION:In an underground heat accumulator comprising a heat exchanger 2 which is connected with a solar heat accumulator 5 and which is buried underground to form an underground heat accumulating zone 3, the arrangement is made such that all sides of the underground heat accumulating zone 3 are not thermally insulated in the range where the following condition is satisfied. W/d>=10, W/h>=10 wherein W is a side of a plane of the heat exchanger 2; h the height of the heat exchanger 2; and d the distance between the ground surface and the upper surface of the heat exchanger 2. Further, in the range where W/d>=5, W/h>=2 are satisfied, all sides of the aformentioned under- ground heat accumulating zone are thermally insulated. |
