One thing I found interesting is that about 10% of all energy gets siphoned off before being used (export and nonfuel). Of the remainder, 61% is lost energy and 39% is useful energy.
That seems about right given the realities of engineering. I don’t think you can get more than 50% useful due to such things as entropy, etc., so we are 80% of the way to 50%.
Neighbohood nuke plants please, in a supporting grid.