Yeah fostering waste heat into useful energy sounds very very much like “making entropy go down.” We know we can make entropy go down in one spot by increasing it even more in others. But for them to do that here. They’d be turning high entropy into low entropy PLUS more high entropy, which sounds circularly self-fueling or essentially perpetual option. Most of our electrical generation capabilities use heat at some point to boil water, but what makes that work is water’s phase change behavior, accessible temperature for that phase exchange, and water’s ubiquity.

If they can pull this off: amazing. But it sounds very much like a quixotic adventure for a legendary inventor’s final days. Someone call me when they have something applicable.