HOT WATER STORAGE SYSTEM

PROBLEM TO BE SOLVED: To provide a hot water storage system capable of supplying hot water in a hot water storage tank at a proper temperature while suppressing consumption of a battery under a situation that supply of gas and electricity is stopped.SOLUTION: In a hot water storage system including a hot water storage tank 13 for storing hot water/water heated by recovering exhaust heat of a fuel battery 4, and preparing hot water to be supplied by mixing hot water obtained from the hot water storage tank 13 and supply water by a mixer 23, the mixer 23 is driven by a battery so that a ratio of hot water from the hot water storage tank 13 in a mixture ratio by the mixer 23, is set to be a prescribed value or more (for example, 100%), when gas supply is stopped and power failure occurs. As a combination faucet 8 is spread in households, a user can get hot water of a desired temperature by mixing supply water by the mixing faucet 8 at a terminal, only by setting the mixer 23 so that hot water of high temperature is supplied from the hot water storage system.SELECTED DRAWING: Figure 9 【課題】ガス、電気が停まっている状況下で、バッテリーの消耗を抑えて、貯湯タンク内の湯を適温で出湯することのできる貯湯システムを提供する。【解決手段】燃料電池４の排熱を回収して昇温した湯水を蓄える貯湯タンク１３を備え、出湯に供される湯を貯湯タンク１３から得た湯と給水を混合器２３で混合して作る貯湯システムにおいて、ガスの供給が停止しかつ停電のとき、バッテリーで混合器２３を駆動して、該混合器２３の混合比における貯湯タンク１３からの湯の割合が所定値以上（たとえば、１００％）になるように設定する。家庭では混合水栓８が普及しているので、貯湯システムから熱い湯が出るように混合器２３を設定しておけば、ユーザは、末端の混合水栓８で給水を混ぜて所望の温度の湯を出すことができる。【選択図】図９