How Siemens Gamesa Could Give Coal Plants a Second Life

By [email protected] Ten years ago, Siemens Wind Power, as it was then known, started playing around with a concept for a thermal energy storage system. Last year, the wind turbine manufacturer now known as Siemens Gamesa plugged a 30-megawatt/130-megawatt-hour demonstration system into the grid at Hamburg harbor.

By next year, it could be breathing new life into coal power plants that are currently scheduled for a date with a wrecking ball.

The Electric Thermal Energy Storage (ETES) technology uses fans to blow hot air into a chamber filled with volcanic rocks to temperatures of up to 800 degrees Celsius. The heat can

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