ENERGY STORAGE SYSTEM AT THE BOTTOM OF THE SEA

The Philippines have a long shore line and this is a promising energy source with this technology. The new system can store energy from renewable sources using a mechanism similar to a hydroelectric dam

Dutch startup Ocean Grazer, a spin-off of the University of Groningen, has designed a battery that can be installed on the ocean floor near offshore renewable energy plants, acting as an energy storage device. The system functions in a similar way to a hydroelectric dam. Ocean Grazer claims that it will provide an almost infinitely-scalable storage capacity on a gigawatt-hours scale.

The device uses a concrete reservoir buried in the seabed which holds millions of liters of freshwater. A system of pumps and turbines runs from the reservoir to a flexible bladder. Excess electricity generated by renewable plants is used to pump water from the reservoir into the bladder. Then, when the energy is needed, the water is squeezed back into the reservoir, driven by the pressure of the seawater above it. As the water moves, it spins turbines which generate electricity that can then be fed back into the grid.

Ocean Grazer claims the system has a 70 to 80 per cent efficiency rate, and can run an unlimited number of cycles over its estimated lifespan of 20 years or more. The company also claims the device can be scalable by simply adding more storage reservoirs and bladders. Each reservoir has a capacity of 10 megawatt-hours.

According to an Ocean Grazer press release, the company has already acquired an angel investor and is moving at a rapid pace, adding, “The ambition is to capture 10-15 percent of the market globally. To realize and accommodate this growth, Ocean Grazer has developed a strategy to develop their patented technology with local partners around the globe. To build the Ocean Battery on site and create local jobs to stimulate the local economy.”

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