Turning the human body into a power station sounds like a zany plotline from the Matrix movies, but scientists are starting to take seriously the idea that one way to stem climate change might be to harvest tiny amounts of energy in the form of the body’s heat, movement, metabolism and vibrations.
I can see certain very specialist applications. But as a general rule I’d have thought this was grossly, grossly, uneconmomic.
For our method of providing the human body itself with power is grossly inefficient. I once did the calculation of how much solar energy (ignoring oil, farming etc, just the evaporation of water into the rain that falls on the crops) we use to provide a calorie of useful fuel to a human. Can’t recall the answer but it’s thousands to one.
Would clearly be, except for some very specialist uses, more sensible to just collect the solar power at 10
% efficiency with a PV cell and then use it.