pv magazine
Summary
Seaborg Technologies, a Danish manufacturer of molten salt nuclear reactors, is working with its sister company, Hyme Energy ApS, to develop a molten salt thermal energy storage technology that can store large amounts of intermittent wind and solar power.
The novel technology was originally conceived for use in Seaborg’s next-generation advanced nuclear reactor, the Compact Molten Salt Reactor. But it acquired a life of its own when the company's experts developed a chemistry control method that holds the corrosion by sodium hydroxide at bay.
The proposed storage system uses renewable energy to heat the salt using electrical heaters. It is based on two-tank molten salt storage designs developed for concentrated solar power (CSP) plants. It has a scalable storage capacity from 250MWh to 5GWh. A 1GWh facility with sodium hydroxides is expected to be able to store heat to produce power and heat for around 100,000 households for 10 hours of discharge.
The two tanks are able to stores electricity as heat at 700 C. The high temperature provides large flexibility for how energy can be extracted back out, including Rankine cycle combined heat-and-power production, Brayton cycle heat-to-power, heat storage for district heating, and industrial process heat.
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