this post was submitted on 25 Jul 2026
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This is the most efficient way when you're burning a fuel, any fuel, always. Otherwise the machine wouldn't capture the waste heat.
Gasoline engines capture only 25-40% of the the chemical energy in their fuel.
Well, there's always supercritical CO2 for getting a bit more spin for your heat.
It's got a pretty fabulous efficiency, pretty fabulous cost too.
You also have Stirling generator. No water needed, just heat. But they're more expensive and less efficient, so not used for commercial applications.
Or a Peltier element if you want to be fancy
The main commercial application of stirling engines is the sale of fancy little brass alcohol powered sterling engines.
And to keep me amused machining all the parts needed to make one.