| 摘要 |
The present invention relates to a circulation system to accumulate the thermal energy of a heating source. According to the present invention, the circulation system comprises: a heat collecting unit to heat a first thermal medium moving in the circulation system by the heat of the heating source; a heat accumulating unit provided with a container to store a second thermal medium therein, to store the heat of the first thermal medium; a first heat exchanging unit to exchange heat between the first and the second thermal medium on an upper portion inside the heat accumulating unit; a second heat exchanging unit to exchange heat between the first and the second thermal medium on a lower portion inside the heat accumulating unit; and a valve unit to selectively supply the first thermal medium to either one among the first and the second heat exchanging units. |
