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Head enery containment
@mawr Depends on how that heat is being emitted in the first place. The easiest way would be to capture it using an insulated containment system, so that more energy is captured and not lost to diffusion or bleed.
Personally, I'd use thermocouples hooked up to a battery to convert the heat into stored energy.
Other ways would be using the heat to convert water into steam to turn turbines, which generate power to turn motors to turn bigger turbines.
