Stirlingengineforum.com

No I'm not a "good student". Sorry to disappoint I think the quote is "smart students". I can tell. Smart students learn how to identify errors in teaching, learning, and experimenting. The rest, who cares. They won't be doing much productive anyway. Why would your not getting i...

https://m.youtube.com/watch?v=P11q-BAhvqk You claim the engine was running for three hours, but it is clearly removed from the heat seconds before all measurements are made. Placed on a "cold" ambient table cooling it enough that even when placed back on the water cup, with mist coming off...

Adiabatic.svg.png Top left of adiabatic is point 2. Isentropic expansion follows down thick green line, and does positive work equal to the shaded green area under the curve. Compression returns along the same line back to point 2. Requires work input equal to the shaded green area under the thick ...

No. It's just modeling a wall, and given surface temperatures. The constant temperatures outside are standard heat source and sink models. That is similar to all the high and low constant temperature.sources used to model engines. As Feynman said, "TSOWGI". It's supposed to show how heat f...

"You just skip 1 and go straight to 2?" You are proposing a series of adiabatic processes that start at point 2. The only adiabatic path available is the one that starts at point two, where you switch to adiabatic processes, follows an adiabatic expansion line forward until all motion is e...

n=1-Tc/The

1-300/400 = 0.25
1-1000/1200 = 0.166

Wider ∆T lower efficiency! How come?

https://www.engineeringtoolbox.com/cond ... d_428.html

I keep thinking that acrylic is transparent to infrared, so what is the camera reading that has that temperature? Also when there is a wall, the temperature difference between the inside and outside is an indicator of how much heat is being ejected. A function of delta T and R value. I also think th...

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 ...

Fool wrote:The only way back to 300 at that point, is to reject 300 units of heat. ...

Could have sworn I wrote the following, but I didn't...

The only way back to 300 at that point, is to reject 100 units of heat. ...

Point 1 starting point Qcz, V1, T1, P1. Each process ends at a new point. Point 2, 3, 4 etc.. Each as it's own Pressure P, Temperature T, and Volume V. Some are the same V1=V2 Volume 1 and 2 are the same, said another way "V1/V2<both the same". Sorry. Again it would be easier with a chart....

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 uni...

Absolutely correct. The problem lies in explaining it to someone who isn't knowledgeable of integral calculus. It takes a good instructor to enlightened someone on the usefulness of the area under the curve, and above the axis. And a chalkboard too. Momentum isn't energy, but it contains energy. The...

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...

So during the expansion stroke the gas is in contact with Tc? The working fluid is shifted from the hot side to the cold side about 1/2 the way to BDC (between full compression and full expansion), so yes. for the latter mostly adiabatic phase after most of the heat input has been used up (converte...