REGENERATIVE TYPE FUEL BATTERY SYSTEM AND OPERATION METHOD FOR THE SAME

• Main Authors: SHINOZAKI NOBORU, YANAI YUSAKU
• Format: Patent
• Language: English; Japanese
• Published: 28.01.2016
• Subjects: APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a regenerative type system and an operation method for the same that can omit a booster pump for increasing the pressure of hydrogen and oxygen, miniaturize a circulation pump of a water decomposition unit and enhance the efficiency of a water supply pump to the water decomposition unit.SOLUTION: A regenerative type fuel battery system has a fuel battery unit 20 for generating power by using hydrogen and oxygen of power generation pressure P1 of 1 MPa from the atmospheric pressure, a water decomposition unit 30 and a gas storage unit 40. The water decomposition unit 30 has a water electrolyzing device 32 for electrolyzing water to generate hydrogen and oxygen of generation pressure P in a pressure range higher than the power generation pressure P1, a high pressure circulation pump 34 for circulating and supplying water for electrolysis to the water electrolyzing device 32 under the generation pressure P, and a low pressure circulating device 35 for circulating and supplying water for cooling to the water electrolyzing device 32 under lower cooling pressure P2 lower than the generation pressure P. 【課題】水素と酸素を高圧にするブースターポンプを省略することができ、水分解ユニットの循環ポンプを小型化でき、水分解ユニットへの給水ポンプの効率を高めることができる再生型燃料電池システムとその運転方法を提供する。【解決手段】大気圧から１ＭＰａの発電圧力Ｐ１の水素と酸素を用いて発電する燃料電池ユニット２０、水分解ユニット３０、及びガス貯蔵ユニット４０を備える。水分解ユニット３０は、水を電気分解して発電圧力Ｐ１より高い圧力範囲の生成圧力Ｐの水素と酸素を生成する水電解装置３２と、水電解装置３２に電気分解用の水を生成圧力Ｐで循環供給する高圧循環ポンプ３４と、水電解装置３２に冷却用の水を生成圧力Ｐより低い冷却圧力Ｐ２で循環供給する低圧循環装置３５とを有する。【選択図】図２