| 摘要 |
PROBLEM TO BE SOLVED: To provide an energy storage system capable of storing hydrogen in an amount, with higher accuracy, corresponding to electric energy consumed in a predetermined period by a load.SOLUTION: The energy storage system concerning the present embodiment comprises a water electrolysis unit, a fuel cell, and a control unit. The water electrolysis unit generates hydrogen through electrolysis of water by using power supplied from a power generation unit using renewable energy, and stores the generated hydrogen into a hydrogen storage unit. The fuel cell generates power by using hydrogen stored in the hydrogen storage unit. The control unit calculates electric energy to be consumed in a predetermined period by a load to which power is supplied from the power generation unit and the fuel cell, and controls the water electrolysis unit so that the hydrogen storage unit is made to store the hydrogen in an amount corresponding to the calculated electric energy.SELECTED DRAWING: Figure 1 |
