| 摘要 |
PURPOSE:To vary the heat accumulating capacity of a heat accumulating tank according to the load of hot water supply, by disposing two auxiliary heat sources at different height above a water heating heat exchanger. CONSTITUTION:A low-temperature tank 7 is constituted by disposing a heat exchanger 6 connected to a solar heat collector via pipes 4, 5 at a lower portion of a heat accumulating tank 1, while an upper high-temperature tank 3a and a lower high-temperature tank 3b are formed by disposing auxiliary heat sources 2a, 2b at different heights above the low-temperature tank 7 in the heat accumulating tank 1. Here, arrangement is such that the capacity of the upper high-temperature tank 3a is equal to the sum of the capacity of the lower high-temperature tank 3b and that of the low-temperature tank 7. |
