Search found 15 matches

by Daemon
Fri Nov 11, 2022 11:05 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: 100% efficiency (+) it it possible?
Replies: 73
Views: 23935

Re: 100% efficiency (+) it it possible?

The traditional, established, standard explanation is that the ice "sinks" or absorbs more heat more quickly. However, I think we can probably agree that increasing the heat on the hot side will have the same effect. But if I heat up a "free piston" thermal lag type engine with ...
by Daemon
Fri Nov 11, 2022 8:20 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: 100% efficiency (+) it it possible?
Replies: 73
Views: 23935

Re: 100% efficiency (+) it it possible?

This is the issue I have with the "standard" thermodynamic model (or "Ideal" Carnot/Stirling cycle) To quote a random but typical explanation: Resize_20221109_051935_5021.jpg https://homework.study.com/explanation/the-following-statements-are-for-stirling-engine-and-carnot-engin...
by Daemon
Wed Nov 09, 2022 12:54 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: 100% efficiency (+) it it possible?
Replies: 73
Views: 23935

Re: 100% efficiency (+) it it possible?

. Logically, with such a gradual heating and cooling process, would increasing the temperature of the hot side, (for exame, with MAP gas, as in the following video) not require additional time for cooling each cycle?. No, the reason is because the rate at which heat energy will transfer from one ma...
by Daemon
Fri Nov 04, 2022 2:55 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: 100% efficiency (+) it it possible?
Replies: 73
Views: 23935

Re: 100% efficiency (+) it it possible?

I'm not sharing my system, I haven't made money with it yet and I'm feeling greedy. But I gave you enough hints to work on your own ideas. You need a system, that recapture and uses the expelled heat for the next heat cycle in such a way that it does not interfere with the cooling cycle in a negativ...
by Daemon
Fri Nov 04, 2022 2:50 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: 100% efficiency (+) it it possible?
Replies: 73
Views: 23935

Re: 100% efficiency (+) it it possible?

This is the thread to post it on so I will post here instead: 1. If you heat a gas at constant volume, you get a change in pressure. 2. If you heat a gas at constant pressure, you get a change in volume. 3. The opposite of 1 and 2 are also true Hot air engines work on this basis: At bottom dead cent...
by Daemon
Thu Nov 03, 2022 11:23 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

https://m.youtube.com/shorts/RXHhnu-_b68 That's back to my channel, I've only got the one video posted on it now, I'll have a nicer video when I have something nicer to show off. Thanks, I do remember seeing that video. Seems like a rather strong, steady running engine. Was that using rice or somet...
by Daemon
Sat Oct 29, 2022 12:31 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

I should point out, the unit on candles didn't "run so powerful so quickly I had to use fewer candle" rather, it ran with a lot of power on 2 candles but I was reaching thermal overload quickly because I welded with solder and I was using glass beads. Now that I have copper BB's in there I...
by Daemon
Fri Oct 28, 2022 10:45 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

https://m.youtube.com/shorts/RXHhnu-_b68

That's back to my channel, I've only got the one video posted on it now, I'll have a nicer video when I have something nicer to show off.
by Daemon
Fri Oct 28, 2022 3:15 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

Yeah sure, I'm on vacation over seas atm, but I'm taking some time to work on it. I've got a mill, lathe and a few engineers from Siemens here interested in helping me get a piston model running. So I'll probably have some great insights to post to my channel next week.
by Daemon
Thu Oct 27, 2022 8:22 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

Any ways, I'm still trying to pin down the physics of this system. I feel like I need to make a piston model to really understand what's going on and what kind of forces are involved. Is it concussion from steam explosions? Is the boil more isothermal? Does the boiling cease on the return stroke or ...
by Daemon
Thu Oct 27, 2022 4:11 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

I feel the same way about debating you about efficiency in energy conversion processes. I'm hear to talk about a closed cycle, piston driven steam engine. I'd like to return to that. I have no interest in speculating about achieving 100% thermal efficiency when I could get a nobel price for getting ...
by Daemon
Thu Oct 27, 2022 5:12 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

Not being facetious, the factory I worked in was really old and all the automation was still driven with pneumatics.

Most of the controllers and sensors I worked on are basically pneumatic analog computers.
by Daemon
Thu Oct 27, 2022 5:10 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

Let's put it this way, just because I extracted 10 joules of energy from the gas as it heated and expanded, doesn't mean I don't have to heat the gas to the same temperature to achieve the same volume. It means hearing the gas is going to use 10 joules more energy than if I was exclusively heating t...
by Daemon
Thu Oct 27, 2022 2:57 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

I'd say, no we don't. The internal pressure and temperature has already been made lower than atmosphere. The expanding gas has already done it's work to put the piston into that position, and "let go". Ah, I see where the misunderstanding lies now. You may want to research the "ideal...
by Daemon
Wed Oct 26, 2022 3:38 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?
Replies: 136
Views: 48636

Re: Absurdly simple thermoacoustic-steam "rice" engine – What's going on here?

@Tom Booth I accidentally double posted, there is no delete option, I reported the double post because I can't clean it up myself, I am banned. I don't understand why. I am autistic and I struggle enough with online interactions without being permanently banned for trying to correct my own errors. A...