CHEMICAL HEAT STORAGE SYSTEM, AND HEAT STORAGE METHOD

To provide a chemical heat storage system and a heat storage method that can suitably advance a heat storage operation of a chemical heat storage material by restraining decrease in an absorption rate of water vapor caused by deliquescence of an absorbing material.SOLUTION: A chemical heat storage system 11 comprises a recovery flow passage L1 for sending water vapor to a recovery device 13 from a heat storage device 12. The chemical heat storage system 11 comprises a condenser 14 for condensing water vapor by using a cooling medium, a condensate flow passage L2 for sending water vapor to the condenser 14 from the heat storage device 12, and an opening/closing control unit 32 for controlling opening/closing of the recovery flow passage L1 and opening/closing of the condensate flow passage L2. The opening/closing control unit 32 is constituted so as to perform control for switching from a condenser operation step for closing the recovery flow passage L1, opening the condensate flow passage L2, and operating the condenser 14, to a recovery device operation step for closing the condensate flow passage L2, opening the recovery flow passage L1, and operating the recovery device 13, during a heat storage operation of a chemical heat storage material HM.SELECTED DRAWING: Figure 1 【課題】吸収材の潮解を要因とした水蒸気の吸収速度の低下を抑えることで、化学蓄熱材の蓄熱動作を好適に進行させることのできる化学蓄熱システム、及び蓄熱方法を提供する。【解決手段】化学蓄熱システム１１は、蓄熱器１２から回収器１３に水蒸気を送る回収用流路Ｌ１を備える。化学蓄熱システム１１は、冷却媒体を用いて水蒸気を凝縮させる復水器１４と、蓄熱器１２から復水器１４に水蒸気を送る復水用流路Ｌ２と、回収用流路Ｌ１の開閉と復水用流路Ｌ２との開閉を制御する開閉制御部３２とを備える。開閉制御部３２は、化学蓄熱材ＨＭの蓄熱動作中に、回収用流路Ｌ１を閉鎖するとともに復水用流路Ｌ２を開放して復水器１４を作動させる復水器作動ステップから、復水用流路Ｌ２を閉鎖するとともに回収用流路Ｌ１を開放して回収器１３を作動させる回収器作動ステップに切り替える制御を行うように構成される。【選択図】図１