High-pressure alkaline water electrolyzer for renewable energy storage systems

One of the priority tasks of modern power engineering is the development of renewable energy sources (RES). Solar and wind are usually used as primary energy sources for RES based power plants. If there is an extended sea or ocean line, the energy of tidal and wave power plants can be used as an effective renewable source. Highly efficient energy storage systems can be created on the basis of hydrogen technologies. The main advantages of hydrogen energy storage systems are: high efficiency (efficiency can reach 50% for fuel cells and 80% for electrolyzers), low inertia, long service life, minimum start time. The water electrolyzer is one of the three key elements of energy storage systems based on hydrogen energy technologies. In this paper, a modern type of high pressure alkaline water electrolyzers (up to 100 bars) intended for the accumulation of renewable energy is described.