Stirlingengineforum.com

Maxwell`s Demon.png Like the picture, we perhaps always imagine the gas molecule's hurling around, bumping into each other or into walls or piston tops. But then what's in between the molecules' ? ;-) I imagine the container or cylinder is "packed" with molecule`s. They are touching each ...

@Fool, Quote : " we may assume that thermodynamic language has to change in the future to be more aligned with the real empirical phenomena and, even more, according to the causality of the underlying phenomena. Article “Thermodynamics: A Misconceived Theory” (Hans Fuchs 1987) Quote Children an...

Quote : "I've done a lot of experiments trying to run a Stirling engine on ice, with ice on the bottom. I was very surprised and puzzled to find that this did not work very well." I am sure, that I have read somewhere, that Sterling constructed his engine with the power-piston on the cold ...

Tom, I really admire your patience with this "Fool". But like Don Quixote, it is . . . . In my (practical) world, efficiency is the relation between what you put in, versus what you get out. Please, read again : What YOU put in ! So if the input is 1 Kelvin, where does "the rest"...

Again definition on Joule from Wiki: "A result of this similarity is that the SI unit for torque is the newton-metre, which works out algebraically to have the same dimensions as the joule, but they are not interchangeable. The General Conference on Weights and Measures has given the unit of en...

Hi Fool, Not to offend your calculations, but we have to agree on the definitions. Quote: "P1 = STP = C 101325 Pa (Pascals) (N/m^2) = 14.6959494 psi The given starting, Standard Temperature and Pressure, STP." (on 273,15 K) Regarding STP from WIKI : https://en.wikipedia.org/wiki/Standard_t...

This one looks a just like the Ky Ko inside, though "electrified" : https://www.ebay.com/itm/204296343706?hash=item2f9102d09a:g:MpYAAOSwMnVd1UtM&amdata=enc%3AAQAIAAAAwEeFTJYe2YGBhtUdW59qFo%2B9kbFEWS2G6HLXSd0lLjCVHHsikwIBlqSu%2BeX%2FROc3u7m9UUjCMxiz6OvYM92GsIMikYyP3%2FA%2B%2BzAxA0Lz1bE3...

Tom, I think you are spot on with this perspective: "So, in a sense, the heat engine is the "heat sink" taking in heat/energy from multiple sources and converting that thermal energy into mechanical motion or "work". It is easy for most people to accept/understand, that air ...

"Again, in such a position the hot piston is incapable of imparting any angular turning force to the crankshaft because it is exactly perpendicular. Locked in." - And this is a common problem of (almost) all piston engines, incl. steam and ICE. The ignition or steam/air inlet is a few deg....

Cavitation happens in a liquid from work input. Condensation happens in a gas from work output. Both can erode Impellers. There isn't anything misleading about my last statement. They appear to use Claude's process to decrease the temperature to just above liquidation temperature. Then expand it fu...

@Fool " I would like to point out that PV/T=mR/M are state points on a PV diagram. Heat and Work aren't in that equation." Just to point out : p : Pascal V : M3 (cubic meter) T: Kelvin m: kilogram R : 8314 Joule/Kelvin*kilomol (gas-constant) M : Molar weight in kilogram/kilomol (for air it...

"Goofy, What is the point of the displacer? Is it needed?" In a Stirling engine, yes. But as you write " (in most motors at least)" The Carnot equation includes all heat engines. Also steam and diesel. As a Marine Engineer, I have been knocked on my head with these formula's for ...

Mike, repeating the paradigm " if the cold end doesn't remove heat from the working fluid" simply doesn't make any sense. The heat is not "removed" it is converted to pressure, who pushes the piston. Therefore the heat is not to be found anymore or pile up somewhere. It is pressu...

In my (simple) mind, it´s the pressure that´s doing the work, not the heat as so. The heat supply is causing the pressure to rise so you can use it to preform mechanical work on a piston. Then the pressure falls during the stroke from TDC to BDC and. When the pressure falls the temperature falls, as...

I have build several expansion engines (not exactly Stirling engines), when running on compressed air at perhaps 6 bar, they easily go down to -50 Celsius on the exhaust, in one stage. At least that's what my (cheap) digital thermometer can go down to. They also seems to suddenly "get stocked&q...