Finland’s radical answer to renewable energy’s biggest headache: The world’s largest sand battery

A sand battery facility in Finland stores thermal energy in heated sand to address intermittency in renewable energy systems. The facility, located in a Finnish town, heats sand to high temperatures during periods of excess renewable energy generation and releases that heat when energy demand rises. Sand batteries operate by circulating air through heated sand to produce warm air for heating systems, reducing dependence on fossil fuels during peak demand periods.

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