Sounds too good to be true.
This is actually the kind of thing I have been trying to dream up. I see so much energy being wasted as heat. Here in Houston, that is the last thing we need is more heat energy.
The heat build up in my attic seems like such a waste. I thought of putting a water tank up there and, with some pipes, create a flowing system that powers a tubin.
If a way could be found to turn heat energy into electric energy, Houston’s energy needs could be easily met.