Search found 3449 matches
- Wed May 08, 2024 1:15 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Compression cycle.. worthwhile?
- Replies: 12
- Views: 9853
Re: Compression cycle.. worthwhile?
"Ah..., that doesn't apply to Stirling engines", I've been told again and again. If not, why not. The energy represented on a PV diagram depends on path, and the direction traveled on the path. The initial difference between a Stirling Engine and a Stirling cooler is the direction taken o...
- Wed May 08, 2024 12:41 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 489
- Views: 25328
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Can we see some of your test results demonstrating the Carnot limit using properly calibrated thermal imaging? Thermocouples? Finger feel, "seems hot" readings? Anything? You, Carnot, Kelvin, Clapeyron, Clausius, Maxwell, Gibbs, Boltzmann, Joule, anybody? Has ANYONE verified this so-called...
- Wed May 08, 2024 12:02 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 489
- Views: 25328
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
You seem to have a double standard when it comes to questioning "science". You heap mountains of derision and impossible levels of independent replication and verification etc. etc. on my casual kitchen table experiments but YOUR supposedly established science Carnot/Kelvin "efficienc...
- Wed May 08, 2024 10:41 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 119
- Views: 1324
Re: Tesla's Ambient Heat Engine revisted
In the video where I pull back the insulation, the IR image and readings seem to indicate a clear division between the hot regenerator (87°F) and cold top plate (62°F) Compress_20240508_133713_3920.jpg The power cylinder is also near the forefront of the image, but this was the first video taken wit...
- Wed May 08, 2024 10:12 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 119
- Views: 1324
Re: Tesla's Ambient Heat Engine revisted
Maybe the engines I'm getting with the isolated pp will help to resolve the issue of how the pp is heating up?
Can the hot gas travel all the way up that metal stem without loosing heat along the way?
Also if the pp heats up while the engine is running on ice?
Can the hot gas travel all the way up that metal stem without loosing heat along the way?
Also if the pp heats up while the engine is running on ice?
- Wed May 08, 2024 10:04 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 119
- Views: 1324
Re: Tesla's Ambient Heat Engine revisted
I'm still confused Tom. Why would the power piston NOT be warmer? Hot gas is expanding into it.. 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...
- Wed May 08, 2024 8:38 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 119
- Views: 1324
Re: Tesla's Ambient Heat Engine revisted
... What I'm still trying to fathom is why your temperature IR camera, appears to have little experimental control. No known temperatures to read, ice, boiling. ... The camera was factory calibrated. I did tests when I got it. It seemed to read OK using ice, boiling water etc. For relative temperat...
- Wed May 08, 2024 6:48 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling engine / Hydrogen storage system
- Replies: 3
- Views: 2706
Re: Stirling engine / Hydrogen storage system
There is an Australian(?I think) company getting into this hydrogen heat. Catalyst technology big time. https://youtu.be/qng_UEQSY04 https://youtu.be/3Lyfn5AooSg Articles I've found though say the catalyst used is "secret", proprietary, patented. Earlier in the previous above video he show...
- Tue May 07, 2024 10:45 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling engine / Hydrogen storage system
- Replies: 3
- Views: 2706
Re: Stirling engine / Hydrogen storage system
There is a rather astonishing demonstration of a Stirling engine running on hydrogen gas. Or heat from hydrogen gas but without a flame. The outside of the displacer chamber is coated with some kind of catalyst. The demonstration is well into the video about 23 minutes almost at the end Here he's de...
- Tue May 07, 2024 9:07 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Wilcox Caloric, 1860, open-cycle, regenerator
- Replies: 3
- Views: 58
Re: Wilcox Caloric, 1860, open-cycle, regenerator
The description of the regenerator found here: http://hotairengines.org/open-cycle-engine/wilcox-1860/wilcox-hot-air-or-caloric-engine Seems very different from what is depicted in the illustration above. The regenerator design is quite interesting in that it expands radially outward from the center...
- Tue May 07, 2024 11:07 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 119
- Views: 1324
Re: Tesla's Ambient Heat Engine revisted
One thing I haven't tried yet, I don't think, is running one of the modified LTD engines with a retrofit regenerator on ice/ambient heat. Well, I did once and the engine froze up, or something. Anyway, a slight modification of the drawing I posted earlier in the thread: Compress_20240507_135720_0200...
- Tue May 07, 2024 10:05 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling essex - beta or gamma ?
- Replies: 15
- Views: 6728
Re: Stirling essex - beta or gamma ?
You could be right. I would have basically agreed up until yesterday, given my newly found "inspiration" that a regenerator is actually, perhaps, more for cooling. To take heat temporarily out of the picture during compression, rather than for just conserving heat necessarily. I can say, a...
- Tue May 07, 2024 8:26 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling essex - beta or gamma ?
- Replies: 15
- Views: 6728
Re: Stirling essex - beta or gamma ?
Due to the thin brass walls(.015") of the main tube, displacer and power piston, the original Essex has pretty effective regeneration without any additional dead space or flow restriction. I'll try to film a thermal video to show this later. True to some degree I guess. But a "regenerator...
- Tue May 07, 2024 7:50 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 119
- Views: 1324
Re: Tesla's Ambient Heat Engine revisted
"Pretty obviously the elevated heat signature appearing around the power piston could only be from "work"." Why is that? Could the heat not come from the working fluid? Well, maybe. How? It's the cold side of the engine. The top of the engine in contact with the working fluid is...
- Mon May 06, 2024 11:14 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Regenerators.... Have I got it straight what they do?
- Replies: 8
- Views: 1528
Re: Regenerators.... Have I got it straight what they do?
I've had recently what I feel is a new insight into the value of a regenerator. I never thought it worth much as a means of storing excess "waste heat" that would otherwise be lost, on the basis that a well designed efficient engine shouldn't have any waste heat, but even so, it seems such...