What would it take to power the entire U.S. economy on renewable resources alone? Three big things: Only build wind, solar, or hydro power plants after 2020 Reduce energy use compared to business as usual by 40% Electrify everything It’s … Read More
A 5-minute video explaining CLEAN Contracts (a.k.a. feed-in tariffs) in simple terms. It’d be great if it used a name for the policy that’s in common circulation, but since I was guilty of using Renewable Energy Payments, too, I shouldn’t … Read More
Over at Climate Progress, Stephen Lacey recently asked why there isn’t more development of micro hydro in the U.S., given its potential to provide more than 30,000 low-cost megawatts of power to U.S. states (and bipartisan political support).
We can’t answer that question any better than Stephen, but we can provide a good illustration of that potential, replicating a map from our 2010 report Energy Self-Reliant States (click here for a larger version):
New Micro Hydro Power Potential (Percent of State Electricity Sales)
A nice, short comparison of the cost of electricity storage with pumped hydropower and batteries.
Using pumped hydro to store electricity costs less than $100 per kilowatt-hour and is highly efficient, Chu told his energy advisory board during a recent meeting. By contrast, he said, using sodium ion flow batteries — another option for storing large amounts of power — would cost $400 per kWh and have less than 1 percent of pumped hydro’s capacity.
Of course, you need to have a river with a likely reservoir location to have any significant quantity of pumped storage, making the article’s reference to Texas a bit ironic.
For those unfamiliar with the concept, here’s a nice diagram of pumped storage from Consumers Energy: