Well, you could put a sterling engine to transfer the heat to the ocean and generate energy back. This is exactly what some submarines do [1] [1] https://en.wi

Well, you could put a sterling engine to transfer the heat to the ocean and generate energy back. This is exactly what some submarines do [1] [1] https://en.wikipedia.org/wiki/Applications_of_the_Stirling_engine#Marine_engines https://en.wikipedia.org/wiki/Applications_of_the_Stirling_e...