One hundred tons of molten salt circulate through the German Aerospace Center (Deutsches Zentrum fÃ¼r Luft- und Raumfahrt; DLR) test facility in Cologne. The molten salt is alternately heated and cooled from 250 to 560 degrees Celsius. Opened on 15 September 2017, the Test Facility for Thermal Energy Storage in Molten Salt (TESIS) is used to test molten salt storage systems and individual components in a globally unique form. Energy storage facilities play a key role in transforming our energy system. Thermal storage systems in particular can become an effficient – with very low losses – and cost-effective method for temporary energy storage.
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