18 Dec '17, 4pm

Siemens Gamesa Starts Building Hot Rock Plant for Long-Duration Grid Storage

Siemens Gamesa Starts Building Hot Rock Plant for Long-Duration Grid Storage

Siemens Gamesa, the wind turbine manufacturer, began building a 30-megawatt-hour precursor to a gigawatt-scale thermal energystorage system this month. The Future Energy System, first announced last year , is expected to come on-line in early 2019. It will use industry-standard heaters and fans, powered when there is a surplus of power coming into the grid, to heat 1,000 tons of rock up a temperature of 600 degrees Celsius. When needed, the heat will be used to drive a 1.5-megawatt steam turbine, feeding electricity back to the grid. The plant, being built on a site owned by aluminum smelting giant Trimet in the Altenwerder container terminal quarter of Hamburg, in northern Germany, is expected to store enough thermal energy to deliver electricity for up to 24 hours. The round-trip efficiency of the system will be around 25 percent, potentially rising to 50 percent if the ...

Full article: https://www.greentechmedia.com/articles/read/siemens-game...

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