| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat storage device capable of reducing influence of weight of a heat storage material upon expansion and shrinkage action of a heat transfer pipe caused by thermal expansion and preventing breakage and failure of the heat transfer pipe by allowing the action. SOLUTION: The heat transfer pipe 14 is meanderingly arranged so as to combine a plurality of U-shaped pipes having a curved part and a straight part. The curved part 20a curving and inverting like U shape in the uppermost stream part of the heat transfer pipe 14 is arranged above an upper face of a mixed heat storage material 13. The straight part 19 is arranged inside the mixed heat storage material 13. For this reason, since the mixed heat storage material 13 is not arranged on an upper face of the curved part 20a, movement of expansion and shrinkage caused in the straight part 19 of the heat transfer pipe 14 in the vertical direction is not regulated by weight from above. Consequently, weight burden of the heat transfer pipe 14 for expansion and shrinkage operation on an outer face can be reduced when compared with a case where it is completely buried into the mixed heat storage material 13. COPYRIGHT: (C)2004,JPO&NCIPI |
