Patent ID: 8936712
Filing Date: 2015-01-20
Classification: C25B,Y02E

Abstract:
1. A method for operating a water electrolysis system, wherein the water electrolysis system contains: a high-pressure hydrogen production unit for electrolyzing water, thereby generating oxygen at an anode side and generating hydrogen at a cathode side; a hydrogen storage unit for storing hydrogen discharged from the high-pressure hydrogen production unit; a hydrogen supply pipe for supplying hydrogen generated in the high-pressure hydrogen production unit to the hydrogen storage unit; and a water adsorption unit, which is connected to the hydrogen supply pipe, for adsorbing water contained in the hydrogen generated in the high-pressure hydrogen production unit, the method comprising the steps of: starting the water electrolysis system; measuring an elapsed time from start of the water electrolysis system; and preventing the electrolysis in the water electrolysis system from stopping if the measured elapsed time is less than a set time, so that the water electrolysis system continues the electrolysis at least for the set time, wherein α is a variable defining a predetermined threshold value of water concentration, F is the flow rate of hydrogen product, t