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How thermal batteries are heating up energy storage

By District Energy posted 04-18-2024 07:31

  

MIT Technology Review

Summary

We need heat to make everything from steel bars to ketchup packets. Today, a whopping 20% of global energy demand goes to producing heat used in industry, and most of that heat is generated by burning fossil fuels. In an effort to clean up industry, a growing number of companies are working to supply that heat with a technology called thermal batteries.

It’s such an exciting idea that MIT Technology Review readers have officially selected thermal batteries as the reader’s choice addition to our 2024 list of 10 Breakthrough Technologies. So here’s a closer look at what all the excitement is about.

Storing energy as heat isn’t a new idea—steelmakers have been capturing waste heat and using it to reduce fuel demand for nearly 200 years. But a changing grid and advancing technology have ratcheted up interest in the field. “This is a hot area,” says Jeffrey Rissman, senior director of industry at Energy Innovation, an energy and climate policy and research firm.

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