Reply #72: perpetuum mobile [View All]

[rman]

15% of input BTU to power the process: that means that 15% is useful output.
85% as energy to use: also useful output.

that's a total of 100% useful output.
100 units in, 100 units out; no loss. impossible.

It may well be that part of the output is used to power the plant, but that cannot be the only energy needed to power the process.

Natural oil (gas, coal) is a source of energy, in effect it is stored solar energy. Charged batteries for us to find and use, someone else (the sun) charged them for us - no worry to us.
TDP can create oil, but it costs energy so it is not an energy source by itself. Now we are charging the batteries, so now the energy needed to charge them *is* a worry to us.