Stirlingengineforum.com

To make this clear, view the engine as a "fire piston" with a sliding regenerator in the bottom of the chamber. Have the piston driven by a heavy flywheel. Now imagine whenever the piston passes the halfway point a solenoid is tripped that switches from the hot to the cold regenerator on ...

Not "fighting the piston all the way from BDC to TDC". I beg to I differ. The piston motion/acceleration is a result of the pressure inside minus the pressure outside. The two pressures battle each other for the entire cycle. Whether the two produce positive work out or not depends on the...

Alright, done


Both glasses topped off at 12:30 PM.

I'm curious to see how much the birds actually increase the rate of evaporation, if at all

These arrived September 14th (5 days ago) I set them up as seen here and they have both been going ever since, sharing the same glass of water. So far they only seem to be using up about one teaspoon of water a day, between the two, or 1/2 teaspoon each. I tried to get them synchronized, but they ar...

I think a more practical heat engine/evaporative cooler that could be more easily scaled up would be quite possible using a Stirling engine rather than the drinking Bird. The P-19 "ultra LTD" ran on passive evaporative cooling for two weeks. The water supply was maintained by simply hangin...

Another option might be to just have the bird, on the upswing, bump it's tail bulb into one of these, or some similar small engine primer pumps Compress_20240913_002511_1698.jpg In some videos, people have some problems with the bird swinging up and smashing it's glass bottom bulb into the water gla...

O boy you're right, just ran the numbers on a 100cc vacuum engine with a full gulp of 3000 degree F gas at BDC and already hits 1 bar at 20cc and 80 degrees F. I figured an ideal cycle like that would be much more impressive. Seems to me the vacuum engine is uninspiring after all. ... I don't know ...

You guys, all three, have to be paid shills. No normal person could possibly be so irrational as to ignore all common sense and just keep spewing the same crap over and over. I had a friend who did what you do and he told me all about it and he got paid very well for his constant lies, but eventuall...

Ideally there is no gas in the vacuum engine once the valve closes. Or at least you are gaming the curve where any significant compression occurs only very near TDC. The Stirling cycle as defined by Fool and Senft above has a fixed mass of gas that is fighting the piston all the way from BDC to TDC...

The vacuum engine is a great example. It is different in that it really has no compression work until very near tdc, ideally, while the ideal Stirling cycle is compressing its internal volume all the way from bdc to tdc using the buffer pressure to do real work and thermodynamic work. So what is th...

Note (d) is the Ideal Stirling Cycle, comparable to VincentG's opening diagram.

According to Senft, + "positive work" on both expansion and compression or "contraction".

Also: on the previous page it reads:

A plus sign along a segment of the cycle indicates efficacious piston work, i.e. where positive work is done on the mechanism by the piston.,

I can't find any PV or indicator diagrams for a flame licker engine. Senft, "Mechanical Efficiency of Heat Engines" The text reads Figure 1.8(c) is the imagined cycle of a vacuum engine in which the hot gas is drawn into a cylinder at atmospheric pressure and then captured by closing valv...

Probably it could operate an air-lift spiral pump.

https://lurkertech.com/water/pump/tailer/#xtocid213215

My Stirling run's a treat when I heat the end with a mini cooking blow torch but if I use a candle wick with lamp oil it won't get hot enough and run. Any ideas? You might try putting a shroud over the candle, and displacer chamber, possibly with a chimney to retain more heat. Especially if you cou...