Stirlingengineforum.com

Yeah, that's the graphic. Maybe I saw a forum link to it somewhere recently. Anyway, what was the story behind the graphic? (I notice tesla-test capture) edit: in graphic, is one engine running while other is not? Are you kidding me? Are you the same "Matt Brown" who's been in here discus...

Should the ice melt faster under just one engine? Or will it melt faster sandwiched between two engines. Anyone care to guess? Hmmm, how about 2 identical setups (on ice) with one engine running while other engine is not. Already did that years ago. Many times. I tried to find your recent graphic w...

Air inside heating "up" the cold plate, air outside cooling it off, equal equal, what would the outside temperature be? I would think that half way through the wall the wall temperature would be halfway between the two. ... The problem with your theory here is heat does not transfer betwe...

Anyway looks like these engines have no problem running on ice. Compress_20240505_221454_4707.jpg https://youtu.be/ZP2Rxvm5bxc Should the ice melt faster under just one engine? Or will it melt faster sandwiched between two engines. Carnot would predict, I think, that because between two engines heat...

Is this supposed to be isochoric heat addition at TDC? Yes. V1 V2, point 1 to point 2, isochoric heat addition. V1=V2. You got it. Isochoric. Is there a point 1 ? Yes. Qcz, V1, T1, P1. Engine cycle starting point. Point 2. Qhz Beginning of isentropic expansion stroke. End of isentropic compression ...

The engine starts out at 300, atmospheric. 100 heat is added. The expansion stroke starts at point 2, 400. If all the processes are to be adiabatic after that, the complete cycle will end back at point 2, Qhz, V2, T2, and P2, which is 400. The only way back to 300 at that point, is to reject 300 un...

Fool wrote: ↑Sun May 05, 2024 5:05 pm ...If all the processes are to be adiabatic after that, ...

After what?

Sounds like the piston hasn't gone anywhere yet.

The engine starts out at 300, atmospheric. 100 heat is added. The expansion stroke starts at point 2, 400 ... This is already inherently contradictory. Needless to say, I haven't read any further. Is there a point 1 ? How do you get from point 1 to point 2 without expansion? What do you mean by &qu...

... Once the volume of gas can transfer more energy than the body of the engine itself, then IMO, conclusions can be drawn. Bingo, you nailed it again. What does the transfer rate through the engine body or working fluid have to do with the accuracy of IR camera readings? Or anyone's ability to dra...

Pulling a vacuum on a plugged syringe requires an input of work, the gas inside expands doing work for an adiabatic temperature drop. The work input by pulling, plus the work output by the gas, are both absorbed by the atmosphere, changing it negligibly, storing the energy as a spring. The springin...

BTW, I just sent for two of these: Compress_20240505_164820_0963.jpg If there really is no heat getting through, putting two of these together, cold bottom plates adjoined. They should, in effect, refrigerate each other, helping keep each other's cold sides cold. Since they would be sandwiched toget...

Sorry, that was the wrong video, still in my clipboard from the last post. Not sure why it wasn't updated. Anyway, this is the video of the engine with the "compartment" intended for running it on ice. https://youtu.be/cR31i09PnNQ I had been running the engine with ice previously. So perha...

Hey Tom have all your below ambient results been with an acrylic hot plate? I just realized that and it explains why my engine with metal plate always heat soaks the cold plate. I know the metal hot plate is way overkill for these small ltd engines and have been meaning to test a plastic hot end. S...

... I don't think the majority of the elevated temperature of the power piston and cylinder is due to friction. If it was, the engine would have stopped. I think it's due to them being made of materials which pass heat more readily than the acrylic plastic and aerogel. ... Compress_20240504_125427_...

Tom, in the name of science I spray painted half of a Pyrex bowl flat black and tested with the thermal gun at room temperature and after hot water exposure. There was no discernable difference except for a small variation where the paint transitioned to clear glass. I also tested a piece of black ...