DOE Funds to Stretch Concentrated Solar Power Through Salt Storage

Glad to see the Department of Energy (DOE) is investing $62 million in salt storage. It is cheaper and easier to store energy as heat than electricity. The way concentrated solar thermal power essentially works is that the sun's rays are focused on a tube of liquid, the liquid heats up to steam, and the steam turns a turbine which creates electricity. Once the sun stops shining the heat starts to dissipate and the process starts all over again in the morning. Well, instead of letting that heat dissipate into the atmosphere in the evening what if you could store it in something like salt? If you store the heat you can use it again in the morning so the concentrated solar power (CSP) panels don't have to work as hard to heat up the liquid to steam. Storing the excess heat will also allow a large-scale CSP plant to run for many more hours after the sun goes down. Doing this causes the economics of a CSP plant to start looking better and better!

Kudos to the DOE for recognizing an opportunity to help drive down the cost of renewable energy.