Search found 81 matches
- Fri Apr 19, 2024 6:29 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: I'm planning to build a Stirling generator to work off heat from our kitchen stove.
- Replies: 88
- Views: 140531
Re: I'm planning to build a Stirling generator to work off heat from our kitchen stove.
I think so too. I'll first try to get my hands on a Tesla valve to run some tests. I can't readily find a metal one, so I might have to get one made.
- Wed Apr 17, 2024 4:35 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: I'm planning to build a Stirling generator to work off heat from our kitchen stove.
- Replies: 88
- Views: 140531
Re: I'm planning to build a Stirling generator to work off heat from our kitchen stove.
Wow, was it really december since I last visited here? Time really flies. Had some other things to take care of, so I couldn't work on this. But the thinking never stopped. I recently got back into it because a friend gave me a nudge I wasn't expecting. In stead of Stirling engine I'm now looking at...
- Fri Dec 22, 2023 3:38 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: I'm planning to build a Stirling generator to work off heat from our kitchen stove.
- Replies: 88
- Views: 140531
Re: I'm planning to build a Stirling generator to work off heat from our kitchen stove.
After getting myself in a mental loop of efficiency and solutions I had to take a little step back and try to see what was really important. I've got one rotor here that I'll turn into a single rotor prototype. So I'll heat up one side of the cylinder and cool the other. Just to see if this concept ...
- Thu Dec 21, 2023 11:35 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Modified "Hot" Beta engine
- Replies: 146
- Views: 36762
Re: Modified "Hot" Beta engine
Fair enough, no absolute zero. But in my thinking, because transferring every little bit of heat energy into work takes a long time if you're only bringing the fluid back to it's original size. That's why you would over expand it with a piston. But finding the efficient amount of over expansion will...
- Thu Dec 21, 2023 8:35 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Modified "Hot" Beta engine
- Replies: 146
- Views: 36762
Re: Modified "Hot" Beta engine
You were talking about absolute zero in your original post. I was assuming you were trying to get there.
But what you're proposing here would mean finding a sweet spot somewhere. A sweet spot of piston stroke. That won't be easy.
But what you're proposing here would mean finding a sweet spot somewhere. A sweet spot of piston stroke. That won't be easy.
- Thu Dec 21, 2023 5:00 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Modified "Hot" Beta engine
- Replies: 146
- Views: 36762
Re: Modified "Hot" Beta engine
Thinking about it, I guess the fact that it seemed to work quite well in that video with very little lift of the displacer is promising that a smaller displacer compared to piston would work as well.
- Thu Dec 21, 2023 4:53 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Modified "Hot" Beta engine
- Replies: 146
- Views: 36762
Re: Modified "Hot" Beta engine
Depends what you mean by "starting" I guess. Well all engines start at a certain pressure. Be it atmospheric or pressurized. You'd have to expand the fluid beyond that too cool it further. That's what I was getting at. Also, I'm interested to see how all this works on something else than ...
- Thu Dec 21, 2023 3:22 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Modified "Hot" Beta engine
- Replies: 146
- Views: 36762
Re: Modified "Hot" Beta engine
So as I understand this idea you'd need to expand the air beyond its starting volume and below its starting pressure? Do you plan to do this with a calculated stroke? Another idea would be to use something in the same direction Vincent is building. But in stead of dwell you'd somehow disconnect the ...
- Wed Dec 20, 2023 11:15 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Modified "Hot" Beta engine
- Replies: 146
- Views: 36762
Re: Modified "Hot" Beta engine
It's quadruple the work and maybe a bit much for a test setup, but if you have four or more of these in a "circle" you can lead the expanded gas to the cylinder that's 90 degrees away. That way you don't have to have a moving rod through the piston, but you can connect the piston and displ...
- Sun Dec 17, 2023 4:28 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Perpetual Ideas
- Replies: 79
- Views: 86349
Re: Perpetual Ideas
I'm approaching it from the rotary vane angle. It allows me to create chambers where I hold the fluid and move it to where I need it. Right now I'm at the point where I use the fluid at its hottest to power my cold rotor. There will be excess fluid that, in stead of pushing it with the hot rotor thr...
- Sun Dec 17, 2023 4:09 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: I'm planning to build a Stirling generator to work off heat from our kitchen stove.
- Replies: 88
- Views: 140531
Re: I'm planning to build a Stirling generator to work off heat from our kitchen stove.
That's an idea, yeah. Hadn't thought of that. Thanks.
- Sun Dec 17, 2023 2:36 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Perpetual Ideas
- Replies: 79
- Views: 86349
Re: Perpetual Ideas
I don't really see how regenerators in the general sense do anything else than basically change the timing of heating and cooling. So the most work would be done at a different crank angle. For my idea I'm trying to store some heat in the fluid so I can use it to extend the heating cycle. Haven't fu...
- Sat Dec 16, 2023 11:29 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Perpetual Ideas
- Replies: 79
- Views: 86349
Re: Perpetual Ideas
While we wait for that drawing. I'll write down some of my theoretical findings. haha I can't find a more efficient way in my imagination to build a Stirling engine than the vane model. Not only is it ideal because the work is done in the actual direction it is needed, but also because of the flexib...
- Sat Dec 16, 2023 8:30 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Perpetual Ideas
- Replies: 79
- Views: 86349
Re: Perpetual Ideas
I believe the warped disc is forming because of turbulence. Even a disc is never completely flat, and when you drive it to high speeds every minor change in flatness gets affected by the airstream. Vanes are actually a low friction solution already. They're usually made from graphite, which is self ...
- Fri Dec 15, 2023 4:03 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Thanks
- Replies: 1
- Views: 3623
Re: Thanks
Welcome! But be careful, this stuff sucks you in haha. It's an endless puzzle.