| 摘要 |
PROBLEM TO BE SOLVED: To simplify the constitution of a device and permit coping with the volumetric change of heat storage material by a method wherein a reserving tank is filled with specified heat storage material fully with respect to the internal volume of the same while the side wall of a vessel of the reserving tank is provided with a bellows structure capable of being expanded and contracted into up-and-down direction. SOLUTION: A heat storage device is constituted of a reserving tank 1, in which a heating source 2 is accommodated, and a heat storage material 4, filled into the reserving tank 1. A sugar alcohol, having the principal constituent of erythritol, mannitol or the like, is used as the heat storage material 4. An electric heater, such as a pipe type and the like, is used as the heating source 2 and the electric heater of the degree of 0.5-20 kW, for example, is used in accordance with the internal volume of the reserving tank 1. The heat storage material 4 is filled into the reserving tank 1 by 100% with respect to the internal volume of the reserving tank in order to prevent the oxidizing of the heat storage material 4. In the case of erythritol, for example, the solid body of the same at 20 deg.C occupies 0.687 cm<3> or the liquid of the same at 130 deg.C occupies the volume of 0.781 cm<3> per 1 g. Accordingly, the side wall of the storage tank 1 is provided with a bellows 7, capable of being expanded and contracted in up-and-down, in order to follow the volumetric change of the heat storage material 4. |
