Search found 3447 matches

by Tom Booth
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: 488
Views: 25229

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...
by Tom Booth
Wed May 08, 2024 10:41 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 117
Views: 1208

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...
by Tom Booth
Wed May 08, 2024 10:12 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 117
Views: 1208

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?
Compress_20240505_221454_4707.jpg
Compress_20240505_221454_4707.jpg (16.32 KiB) Viewed 12 times
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?
by Tom Booth
Wed May 08, 2024 10:04 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 117
Views: 1208

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...
by Tom Booth
Wed May 08, 2024 8:38 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 117
Views: 1208

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...
by Tom Booth
Wed May 08, 2024 6:48 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engine / Hydrogen storage system
Replies: 3
Views: 2703

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...
by Tom Booth
Tue May 07, 2024 10:45 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engine / Hydrogen storage system
Replies: 3
Views: 2703

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...
by Tom Booth
Tue May 07, 2024 9:07 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Wilcox Caloric, 1860, open-cycle, regenerator
Replies: 3
Views: 55

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...
by Tom Booth
Tue May 07, 2024 11:07 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 117
Views: 1208

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...
by Tom Booth
Tue May 07, 2024 10:05 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling essex - beta or gamma ?
Replies: 15
Views: 6727

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...
by Tom Booth
Tue May 07, 2024 8:26 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling essex - beta or gamma ?
Replies: 15
Views: 6727

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...
by Tom Booth
Tue May 07, 2024 7:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 117
Views: 1208

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...
by Tom Booth
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: 1517

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...
by Tom Booth
Mon May 06, 2024 9:57 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 117
Views: 1208

Re: Tesla's Ambient Heat Engine revisted

... Longer stroke increasing adiabatic cooling? Wouldn't that also increase adiabatic compression, for an identical adiabatic temperature rise reverse stroke? Remember the gas is in the cold space more so, during compression? Hmmm ... This is your constant refrain, but it is apparently wrong. The m...
by Tom Booth
Mon May 06, 2024 9:21 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling essex - beta or gamma ?
Replies: 15
Views: 6727

Re: Stirling essex - beta or gamma ?

Kind of reminds me of my old "hot potato" engine hot_potato_engine.gif Or the more recent "Ringbom" type actuated "hot potato" Resize_20230929_120924_4460.jpg https://stirlingengineforum.com/viewtopic.php?p=22527#p22527 Both are Essex type single cylinder opposed piston...