Re: Energy Storage
AC "...End to end efficiency is about 65% in the real world..."
Was that 65% *with* the extraction and separate storage of the heat of compression as per Lightsail?
Or without?
I didn't think that their concept had yet been commercialized. So if not, then the 65% is the 'before' figure and the 'after' (implementing heat storage) will be much better.
Yes, capital cost matters.
Plus, the total footprint should be compared to natural gas turbines. It'd be silly to have a 'renewable' scheme that actually has a larger total footprint than just burning a wee bit of gas once in a while.
Pragmatism is essential. 'Renewables as a religion' should now be a capital offense.
Biting the hand that feeds IT
