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A comment on A new heat engine with no moving parts is as efficient as a steam turbine. Parent comment

Re:A new heat engine with no moving parts is as efficient as... by Szpadel on Wednesday April 13, 2022 @07:41PM (#31021692)
I'm not sure if there is any way to make heat pump operating in this scale of temperatures, and keep in mind that current heat pumps can only "pump" over about 50°C max until it's no longer profitable.
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Re:A new heat engine with no moving parts is as efficient as... by elil17 on Wednesday April 13, 2022 @07:48PM (#31021745)
That’s not really true at all. Home heat pumps are stuck there because of the refrigerants used. Ammonia heat pumps can go way hotter (though still nowhere close to those temps - more like 150c iirc), it’s just that ammonia requires safety controls that are impractical on a small scale.
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