Stirlingengineforum.com

A tendency is not an effort.

The general tendency for heat to disperse in all directions has been greatly overstated so as to imply that heat makes a bee line for cold just like a river flows downhill. Such a concept is utter nonsense.

Apparently much more heat is lost from the gas due to work output during the power stroke so the energy input from atmospheric pressure on the return stroke is not enough to require any heat rejection on the compression stroke. This is an experimentally observable and verifiable reality regardless o...

Just to be clear, cooling due to transfer of kinetic energy is over and above cooling that may be due to "expansion", simply spreading out the heat over a larger volume. IMO there is no such thing as heat attempting to reach equilibrium. The idea that heat wants to combine with cold, seeks...

Work is a function of pressure x volume. Pressure is a function of heat applied to a gas. But that does not mean that heat converts to work. Work is just a consequence of heat. Heat creates pressure and pressure converts to work as the heat does what heat does, attempt to reach equilibrium. Your fr...

You seem to be assuming that heat going into a gas can "disappear" becoming some form of "internal energy" as in a chemical reaction or some rearrangement of internal molecular structure. Gases however are in their simplest possible structure, so there is no such internal rearran...

For the butane mini-fridge I'm thinking that perhaps a little peristaltic pump might be more effective than a diaphragm pump Self priming, can develop higher psi, pumps air or fluid equally well. Leak proof, good efficiency. Also it appears that the head is detachable, so could potentially be driven...

... W=Qh-Qc ... It is misleading because heat isn't necessary for the conversion, as is demonstrated in every adiabatic expansion. No heat is conducted. Internal energy is converted to mechanical motion. ... In that case: ∆U=Q+W Though given the equivalence of heat and work the distinction is moot ...

... Heat engines run on a temperature difference. All the lifting of rocks will be done when all temperature differences are zero. This will be, in a perfectly isolated room, when the temperature is between the highest temperature and lowest temperature. Sort of near the average temperature for the...

I understand your position Tom. I am looking for an academic to show me some math outlining the direct conversion of heat to work. If it can't be mathematical shown that heat is converted, then how can efficiency be calculated based on the percentage of heat not converted. The math is in the first ...

Rocket #1 is contained in a room, ignited and set to spin around a pole on a string, flying unloaded until depleted. Rocket #2 is attached to its maximum payload, ignited and reaches 5ft off the ground before being depleted. Rocket #3 is anchored to the ground, ignited and sits stationary until dep...

Other evidence: Heat goes in the bottom hot side of the engine but no evidence of heat elevating the temperature of the cold side as logically it should if heat is not being "used up" to run the engine, but is just passing through. Just for example, I ran this engine for three hours on hot...

The compressed air thing is interesting in its own right, but my main point is that there seems to be no evidence that heat energy is actually converted to GPE, just that heat energy can be used to gain GPE. The evidence I see is that heat expands a gas in a Stirling engine that does work, includin...

That final paragraph seems to involve a major mis-understanding on somebody's part (possibly mine) - it certainly seems to describe an 'over-unity' machine. There is a somewhat strange phenomenon relating to compressed air. If you, say, use 10,000 joules of energy to compress air it will release 10...

This might be interesting to experiment with. About $200 on eBay. Nice to see Tesla turbine/generators becoming available anyway. Rated as 50 to 100 watt. Compress_20240523_120109_9621.jpg Again, not a recommendation. I have no experience with the product or the sellers. It may be junk, but this is ...

Oh, one other thing I guess. A complete refrigeration cycle for cooling is actually mostly a heating process. Not "heating" by adding heat but making hotter by compression. That is, the gas or air is first compressed to make it hot. The gas gets hot in the pipes and then the pipes are cool...