Upgrading the Electric Grid With Flywheels and Air
With the high price of batteries, scientists look for simpler ways to store energy.
The modern electric grid is getting some help from some admittedly old-fashioned technology.
Flywheels and compressed air don't sound as sexy as wind turbines and solar cells, but the latter probably won't go mainstream without the former.
"The growth of renewables has posed a problem," said Imre Gyuk, program manager for energy storage research at the United States Department of Energy (DOE). "It used to be that the load [demand on the electric grid] was unpredictable, and generation would try to follow it." As wind and solar installations proliferate, supply also has become unpredictable.
For electric grid operators, "Now it is a balancing act," Gyuk said during the annual conference of the American Association for the Advancement of Science in Washington, D.C.