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Why is the cooling of the gas that results from work output so underestimated and undervalued, often as if it is not a factor at all. Because a heat engine runs on a pressure differential, it ain't a thermo couple. ... Then why is it called a "heat engine"? Anyway, a drop in temperature i...

Very good points Stroller, and Matt. Tom, work comes out of the gas during expansion, dropping the temperature of the gas. You pay lip service to the FACT, which is, of course, undeniable. But you don't seem to really believe it. Work goes in during compression, raising the temperature of the gas. ...

If heat is being converted to work then that should be easily measurable as a torque at the flywheel. But for all the Watts of heat thrown at the hot side of the engine, we see tiny numbers of fairy lights being illuminated by weeny flywheel driven dynamos. Conclusion: getting heat from blowtorch i...

Matt, IMO, seems to be our resident agent saboteur. I suppose he considers it his patriotic duty to protect US oil interests or something.

Ambient powered Stirling spinning a cryo-mode Stirling to freeze the cold hole to -280F. Cryo-mode Stirling Warm-side-rejected-heat fed back to ambient powered Stirling warm side. Free lunch plus ice-cream dessert with a cherry on top. :cool: Trying to run a heat engine on "Cryo-mode Stirling ...

In a good running Alpha, the hot piston is the prime mover. The cold piston being pressured back towards BDC is just a flaw in phasing( as often pointed out by Matt ) and is hopefully avoided. I've come to take just about anything Matt says as intentional sabotage or a red herring. If you want a St...

Just to be clear, atmospheric pressure is at the horizontal line. Compress_20240429_015658_8970.jpg The piston returns 99% of the way by mother nature's "free lunch" as you call it. Actually all the way. The piston has momentum. That too comes from atmospheric pressure. You have head of Ne...

... You seem to be always dismissing the backwork of compression as if the ambient compression of your LTD is a free lunch thanks to Mother Nature... I don't think LTD's are functionally any different than so-called "thermoacoustic" or lamina flow, thermal lag. The pistons return EASILY, ...

.... Good catch Tom on the animation where most of the ideal constant volume transfers are lost amidst real out-of-phase pistons. I'm not sure what I caught that is described by what you just said. "Ideal constant volume transfers"? "Lost"? I can't say I caught that, really, as ...

I may be wrong, but given that pressure and temperature are more or less associated, I can't help but wonder how the working fluid falls, and stays, so far BELOW atmospheric pressure, all the way back to TDC. Resize_20240428_230612_2510.jpg A drop in pressure down to around atmosphere, can be attrib...

Start out with three hundred Homunculus's, little humans, inside an engine pushing out. Add one hundred more. As they push out they get converted to work. After 100 have been converted to work expansion stops. Pushing the piston back in using the work that came out, causes 100 Homunculus's to reapp...

Only observing animations your "differential leverage" observation makes sense in that after the hot piston moves back exposing the hot sides of the hot cylinder, (assuming there is actually a heated hot cylinder as in most animations, Matt has said this is not usually the case, but it's h...

If we assume from all this then, that Tesla's proposed "self acting engine" that runs on ambient heat due to the presence of a "perpetual" cold, how would such an engine be optimized? Compress_20240427_222542_2565.jpg Well, we need very good insulation to protect the ice from the...

Taking this sample problem: T1=400°K T2=300°K efficiency = 1-300/400 = 1/4 = 25% https://www.toppr.com/ask/question/the-source-and-sink-temperatures-of-a-carnot-engine-are-400k-and-300-k-respectively/ That is fine. I agree with it! The question is 25% of what? 25% of T1, all the heat down to absolut...

What happens if active cooling is supplied? That does not increase the "flow of heat through the engine" it just lowers the platform. Lowers the "equilibrium" plane where energy inside the engine is balanced by energy outside. Now if we supply the same 100 joules above ambient, t...