In a small proof-of-concept test, it was able to send electrons back into an Air Force Base electrical grid.
For a few hours on April 12, engineers at Sandia National Laboratories in New Mexico were able to send electrons back into the Sandia-Kirtland Air Force Base electrical grid using a new type of power generating system. This small proof-of-concept,earlier this month, showed the team that their system—which they have been tinkering with since 2007—-was stable, controllable, and able to sync up well to the electrical grid.
“Previous years, we just made electricity, and put it into resistive load banks. That’s like a huge toaster oven, it turns electricity into heat,” says Darryn Fleming, a mechanical engineer at Sandia National Laboratories who worked on this project. “Being able to put power back on the grid was the main outcome for this program.”
, which is kind of like a gas, but also kind of like a liquid. “It has a really high density, but it can also be expanded through a turbine like a gas,” Rapp says. “So, we reduced the amount of work needed for compression because it’s so dense, and that allows us to get to higher thermal-to-electric [conversion] efficiencies.”
Plus, Rapp notes that their tech is heat-source agnostic, so it doesn’t have to be coupled with fossil fuels. “There’s been proposals to couple it with natural gas or coal, but we are funded by the Department of Energy’s nuclear energy division. So we are working to couple it with an advanced nuclear reactor,” he says. “We’ve also worked with the solar towers, where the sun is focused using mirrors to heat up a central tower. It works very well in that application.
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