Search found 677 matches
- Wed May 15, 2024 9:06 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 171
- Views: 2248
Re: Tesla's Ambient Heat Engine revisted
Tom can you unpack that? How would it work without an orifice?
- Wed May 15, 2024 9:04 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 520
- Views: 27663
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
I don't follow baseball but I guess you're from across the pond then?
For starters, I'd like to see a test conducted that proves actual destruction of heat. Not a reduction of, say, internal energy per cubic centimeter, but actual destruction/ conversion of heat energy.
For starters, I'd like to see a test conducted that proves actual destruction of heat. Not a reduction of, say, internal energy per cubic centimeter, but actual destruction/ conversion of heat energy.
- Tue May 14, 2024 6:44 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 171
- Views: 2248
Re: Tesla's Ambient Heat Engine revisted
I meant internal pressure and buffer pressure. How do you increase internal pressure without raising buffer pressure too?
- Tue May 14, 2024 5:59 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 171
- Views: 2248
Re: Tesla's Ambient Heat Engine revisted
An ICE uses a turbo or supercharger to trade some shaft or exhaust power for an even greater gain in specific output with extra fuel.
What would be the equivalent "supercharging" for a Stirling engine? Just a buffer pressure boost? Or something temperature related?
What would be the equivalent "supercharging" for a Stirling engine? Just a buffer pressure boost? Or something temperature related?
- Tue May 14, 2024 9:59 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 520
- Views: 27663
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
I think what is hard to digest is that the 14.7psi atmospheric return stroke helps a typical gas ECE as much as it does an atmospheric Stirling engine. It's just that the atmospheric pressure adds a significant level of power to the Stirling engine, due to its low output on expansion, whereas the sa...
- Tue May 14, 2024 9:52 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 520
- Views: 27663
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Here's my contention with the absolute zero thing, the best we can do on earth is exhaust down to 1atm at 300k or so. So chasing "100%" efficiency is like a baseball player chasing a 1.0 batting average, when .300 is considered excellent, and .400 is unheard. Instead, re-framing "100%...
- Tue May 14, 2024 9:20 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Carnot was being too generous
- Replies: 14
- Views: 159
- Tue May 14, 2024 7:49 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Carnot was being too generous
- Replies: 14
- Views: 159
Re: Carnot was being too generous
Good stuff. The fact is that anyone, myself included, trying to beat Carnot is going to have to present rigorous testing and all inclusive data to back up the claim, and that's just to get taken seriously in the first place. Then comes the naysayers and all the rest.
- Mon May 13, 2024 1:05 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Entropy
- Replies: 9
- Views: 101
Re: Entropy
Are you guys working on a molecular reactor, or a piston engine?
- Sun May 12, 2024 1:52 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 520
- Views: 27663
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
The added energy has increased pressure, but temperature? Possibly, but this is apparently not essential. So how, or in what way is the engine "running on" i.e. powered by a temperature difference? I think this is the unicorn forest Matt always talks about. Explain the mechanism where pre...
- Sun May 12, 2024 12:21 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 520
- Views: 27663
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
But Tom, you can't deny that Stirling engines can run on hot and cold temperature diffentials can you?
- Fri May 10, 2024 10:19 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling essex - beta or gamma ?
- Replies: 20
- Views: 6810
Re: Stirling essex - beta or gamma ?
I'm not sure what really defines either, but by my logic it's a Beta for the following reasons. 1- Both piston and displacer share the same exact bore and axis of travel. 2- Most importantly, the displacer and power piston occupy the same space at various points of the cycle, a feature reserved for ...
- Thu May 09, 2024 5:06 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 171
- Views: 2248
Re: Tesla's Ambient Heat Engine revisted
If that is truly the case, then the gas laws imply that the temperature of the fluid must also be equal, everywhere. This is another case where it helps to think of energy flow into the engine, rather than heat. Glad when you chime in Mike B. I think this ties in nicely with your thoughts on "...
- Wed May 08, 2024 3:40 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 171
- Views: 2248
Re: Tesla's Ambient Heat Engine revisted
Which post, Matt?Over the years, I've often heard of Tesla's ambient heat engine (cold hole) and blown it off as just another one of his wacky schemes (he had many). However, a recent post made me reconsider the possibility.
- Wed May 08, 2024 3:36 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 171
- Views: 2248
Re: Tesla's Ambient Heat Engine revisted
Not sure how you figure "hot" gas is expanding into the power piston. The cold gas, for the most part, is heated and expanded below the displacer as the displacer raises up and drives cold air down to be heated. Aside from that, we can generally say the gas does not actually heat up that ...