Imagine a giant hydro dam that acted as a ‘battery’ for Australia for when the renewables went down. Now imagine that it is on a flat desert plain instead of a traditional hydro dam wrecking a beautiful valley somewhere.
Meet the Nullarbor hydro dam concept which just uses seawater!
Simply pump the seawater up into the dam when you have excess solar and wind. When the sun goes down and you need some energy back, run it back down the 90 meter cliff through the hydro dam turbines back into the sea.
Now imagine that it could run Australia for 10 hours if all the renewables went down at once (which they won’t).
The details are found here. (PDF warning, 155 pages of renewable energy plan, and the hydro dam starts on page 49).
I’m pretty sure nukes will be far, far cheaper than these attempts to make renewables baseload, but who knows whether we can make our politicians see sense? And isn’t this journey into sustainability fascinating?