| 摘要 |
PROBLEM TO BE SOLVED: To provide an accumulator which can exert high heat storage performance in an environment with temperature change through a year.SOLUTION: An accumulator 1 comprises: crushed stone 6 accumulating heat of underground; a heat storage tank 3 storing heat accumulated by the crushed stone 6; a heating medium tube 4 which heating medium moving heat storage of the heat storage tank 3 flows through; and a heat exchanger 5 in which a heat exchange is performed between the heating medium and cooling medium in a cooling medium tube 14 of an air conditioner 13. A normal paraffin 15 whose mean melting point is 12°C and a normal paraffin 16 whose mean melting point is 18°C are contained in the heat storage tank 3. |
