Stirlingengineforum.com

Driving posters away opens the door for new posters to which your job, as educator, starts up at the beginning. As I've tried, you have identified an anomaly that bares further investigation. But it still may fit nicely into 200 year old and current theory. Your methods of discourse here suffer fro...

As you like to point out the "heat of compression" is "instantaneous" so it stops when the volume change stops. The gas is being pushed through the regenerator to the hot space at the fastest rate. Compression is zero. Delta energy from compression is zero during this period. So...

The online example says nothing about "pulling" You would only have to pull on it for the whole stroke if the buffer pressure were at or higher than P1. P2 is even lower. If the buffer pressure where lower than P2 no pulling would be necessary for the whole stroke, but a stop would be nee...

I suppose I should mention the first is energy/work out, the second requires energy/work input. The first pushes, the second must be pulled. I hope this makes sense. The online example says nothing about "pulling" Ideal gas of a volume of 1 m3 at initial pressure of 200 kPa is expanding i...

Fool wrote: ↑Tue May 21, 2024 10:52 am At TDC the piston is briefly not moving. ...

So what?

It just completed generating "heat of compression" the heat of compression is at the maximum and still there, concentrated at TDC.

Your long diatribe is irrelevant.

P1V1/T1 = P2•V2/T2 For the given parameters: P1=P2 Canceling P from both sides: V1/T1 = V2/T2 From given parameters: T2=2•T1 Inserting in to the equation: P1/T1=P2/(2•T1) Dividing both sides by (2•T1): P1•(2•T1) / T1 = P2 Cancelling T1 top and bottom and rearranging: 2•P1 = P2 Please show your &quo...

Please go back and read the conversation. With the input of 36.5J, the temperature increases from 300K to 600K and doubles the volume from 100cc to 200cc. The final pressure balances atmospheric, plus a negligible fraction for holding up the weight of the piston, which I didn't calculate. Are you s...

Please go back and read the conversation. With the input of 36.5J, the temperature increases from 300K to 600K and doubles the volume from 100cc to 200cc. The final pressure balances atmospheric, plus a negligible fraction for holding up the weight of the piston, which I didn't calculate. So not is...

So we are in agreement then? Earlier in the conversation with Vincent I showed that doubling the volume of 100cc of working fluid in a 1cm^2 area cylinder against atmosphere would require 36.5J of energy passed into the working fluid. Then I showed that lifting a 102g piston as well as pushing agai...

... Being accepting of others opinions won't hurt you any, ... ... I accept others opinions. I'm constantly saying "your entitled to your opinion" or "we can agree to disagree". But that is not sufficient for others who insist on trying to "educate" me and refuse to le...

Well, "adiabatic" IS without any kind of thermal transfer in or out of the gas. To me that is a less complex scenario than isothermal which for every joule of work done by the gas an equivalent amount of heat is added to replace it. Very true, but my point being that an adiabatic expansio...

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...