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The end of the compression stroke and beginning of the expansion stroke is where the displacer is moving away from the hot side pushing the gas to the hot side through the regenerator away from the cold side at the highest rate. The piston is at the top of its travel and is moving at its slowest ra...

I had no idea I had done that. Oops. Me bad. Any other examples? ... Probably, but I'm not wasting any more time on the issue. The point is, by continuing to post to these topics you are keeping them afloat, constantly bumping them to the top of the topic list. I rarely post anything other than res...

Yeah. We already covered the additional input energy required to perform work on a piston earlier in the conversation. In the response quoted, I was only considering the free expansion of the gas, so we can isolate one thermodynamic issue at a time. It would have been clearer if I'd specified that ...

Tom that was a good response and about sums up what I would ask. By "free expansion", I believe Stroller and I had settled on the baseline of the gas expanding against one atmosphere. So it's still doing "work". I think, for now, thinking in terms of an isothermal expansion is l...

In any example, we would use the minimum amount of gas needed to do the work at hand . By degrades, I mean into a lower temperature state. It's the action of the expanding gas "consuming" energy that I am interested in. Is internal energy really reduced when the gas expands, other than by...

It's the action of the expanding gas "consuming" energy that I am interested in. Is internal energy really reduced when the gas expands, other than by conduction losses to the surrounding colder surfaces of the engine. And if so, how exactly? The internal energy of the entire expanding vo...

It's the action of the expanding gas "consuming" energy that I am interested in. Is internal energy really reduced when the gas expands, other than by conduction losses to the surrounding colder surfaces of the engine. And if so, how exactly? The internal energy of the entire expanding vo...

VincentG I brought up this topic on the Physics forum the begining of last year, at least I think it is the same thing you are asking. It was a sincere question from my point of view. My threads were being "moderated" with a heavy handed approach, for no good reason IMO, but anyway, though...

... And I don't resurrect old threads. Someone else does. I then join in.... You have a short memory. Between you and Matt If your not actually one and the same. You just started posting to a thread that has been dead for six months: https://stirlingengineforum.com/viewtopic.php?p=20525#p20525 Ther...

Orifice=expansion valve=properly designed capillary tube=manually adjusted valve=needle valve All of which are missing. If you expect someone to believe that a short tiny length of not much smaller diameter tubing ... ... I'm not sure your looking at the same video that I posted saying it looked li...

Heat is not internal energy. To imply that the two are the same, as you often do, is misleading. To claim gases contract, as you do, is misleading. A Stirling engine has to concentrate heat by other means, certainly not by heat being "rejected to the cold plate". Especially considering at...

The "lost" kinetic energy is converted into heat. What is less misleading? 1: The "lost" kinetic energy is converted into heat. 2: The "lost" kinetic energy is converted into internal energy as seen by a temperature and pressure rise in the gas. Two ways of saying the ...

... The orifice works by the pressure drop from flow. ... ...I still contend, am skeptical, that the reduced size tube is insufficient for the pump and claimed performance. Pinching the tube to make a smaller orifice might help, ... P.S., orifices need liquid to work properly. It takes more pressur...

At the start of the compression stroke (in a Stirling engine) the working fluid is cooling and contracting and the piston is driven in by atmospheric or buffer pressure. And where is the heat from this "cooling" going ??? The preference would be to have a drop in temperature that results ...

The capillary tube is the "orifice". It's diameter and length must be sized to the pressure difference, and flow rate. Longer and narrower for lower flows and higher pressure drops. Shorter and wider for higher flows an lower pressure drops. Higher pressure drops are needed for higher tem...