Search found 38 matches
- Tue May 07, 2024 9:22 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Regenerators.... Have I got it straight what they do?
- Replies: 8
- Views: 1580
Re: Regenerators.... Have I got it straight what they do?
The way I understand it, one of the biggest problems with a hot air engine is how much heat you can get into the working gas, and how much you can get out. If you improve the heat absorption and shedding, you raise the power of the engine, or conversely keep the same power while using less fuel. Let...
- Mon May 06, 2024 6:00 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Wilcox Caloric, 1860, open-cycle, regenerator
- Replies: 3
- Views: 101
Wilcox Caloric, 1860, open-cycle, regenerator
StirlingWilcox3.png As the Stirling was patented in 1816, this engine of 1860 hoped to make some improvement on the established benefits of the Stirling. I found it to be interesting and perhaps worth discussion. There is no cooler, and it simply exhausts the used hot air through a regenerator to t...
- Mon May 06, 2024 2:39 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling essex - beta or gamma ?
- Replies: 31
- Views: 6962
Re: Stirling essex - beta or gamma ?
I recall reading about a scientist that was exploring a remote cave, and discovered an un-listed animal that had six legs. By the rules of animal study, it was an insect, with the number of legs being the most important characteristic above all others. However, it "looked like" a spider. I...
- Thu Apr 25, 2024 10:18 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Why can't I "just buy" a stirling engine?
- Replies: 40
- Views: 10612
Re: Why can't I "just buy" a stirling engine?
In response to an earlier post in this discussion, I agree that the cold side is less important. The difference between ambient room temperature and a 1500F flame is very close to 1430F degrees. The difference between 70F ambient room Temps and ice water is may 50F? That being said, any inexpensive ...
- Sun Apr 21, 2024 6:10 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling-Apha heat pump, and finned pistons
- Replies: 6
- Views: 667
Re: Stirling-Apha heat pump, and finned pistons
The company website reported that the fastest they could get it to run well was 1500-RPM. I don't know how accurate that is, but even if its really 10% less, it's likely good enough for any device I might make. I apologize for the potato quality of the drawing. This is what I was thinking for the fi...
- Sun Apr 21, 2024 5:27 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling-Apha heat pump, and finned pistons
- Replies: 6
- Views: 667
Re: Stirling-Apha heat pump, and finned pistons
I made a few minor changes to the regenerator graphic above (compared to the original graphic in the youtube) to make it more easily understandable to those who are new to Stirlings. xxxxxxxxxxxxxxxxxxx Here is the company for anyone who may wish to research this more https://www.fluidmechanics.co.u...
- Sun Apr 21, 2024 5:11 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling-Apha heat pump, and finned pistons
- Replies: 6
- Views: 667
Stirling-Apha heat pump, and finned pistons
I have been assured by people who seem to understand these things, that a heat pump is a wonderful thing, rather than using a conventional A/C unit to cool your home, and a gas flame to heat it. That being said... I won't replay the working principle of an Alpha-Stirling here (for the new readers), ...
- Sun Apr 21, 2024 4:21 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Alpha stirling engine working principle
- Replies: 24
- Views: 4000
Re: Alpha stirling engine working principle
Part of the 90-degree separation between the pistons is the lag-time for the gasses to absorb and shed heat. You "could" separate the pistons by 180-degrees, so all of the gasses are in the hot side or cold side, but then you'd need a third piston to use the gas temp change to spin the thi...
- Sun Apr 21, 2024 2:41 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stir-Lec Opel Kadett series-hybrid car from 1969
- Replies: 0
- Views: 1360
Stir-Lec Opel Kadett series-hybrid car from 1969
In the interests of keeping this forum as the "first best reference" for Stirling links, I'm parking a link here to an article I found. Although the author is known for writing sensationalist click-bait stories (and I've heard rumors that he drinks), this particular one was somewhat useful...
- Sun Apr 21, 2024 2:26 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Rider-Ericsson patent transcribed
- Replies: 6
- Views: 9411
Re: Rider-Ericsson patent transcribed
Recently, I came to the realization that large and heavy vertical pistons are not a compromise or concession, it is a feature. Pressure lifts both pistons at 90-degrees of separation to each other, but...when the pressure decreases, the falling pistons add two more power pulses to the flywheel at 90...
- Thu Mar 07, 2024 4:45 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Rider-Ericsson patent transcribed
- Replies: 6
- Views: 9411
- Tue Nov 28, 2017 10:51 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 1998 patent, V-Alpha, hermetically sealed, helium, etc
- Replies: 2
- Views: 4573
Re: 1998 patent, V-Alpha, hermetically sealed, helium, etc
I've taken the liberty of making a copy of the patent drawing, and then removing a lot of the clutter 20. This is the cooler, a simple liquid-to-gas heat exchanger. The majority of the gas-cooling is performed here, rather than using only the classic annular water jacket around the "cold" ...
- Tue Nov 28, 2017 6:45 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 1998 patent, V-Alpha, hermetically sealed, helium, etc
- Replies: 2
- Views: 4573
1998 patent, V-Alpha, hermetically sealed, helium, etc
https://www.google.ch/patents/US5755100
This particular patent seems to have a great deal of information about the specific materials needed to dynamically-seal the moving pistons, and also to lubricate the bearings and other parts without any type of oil or grease.
This particular patent seems to have a great deal of information about the specific materials needed to dynamically-seal the moving pistons, and also to lubricate the bearings and other parts without any type of oil or grease.
- Sun Nov 26, 2017 7:01 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Rider-Ericsson patent transcribed
- Replies: 6
- Views: 9411
Re: Rider-Ericsson patent transcribed
Selected paragraphs from the intermediate “improved engine” Patent 220,309 from 1879 http://www.google.co.uk/patents?=QjlbAAAAEBAJ&dq=220,309 [Page 1, Column 2, para 2] …My invention further consists in an air-engine provided with a sectional fire-chamber, to allow the ready removal and replacem...
- Sun Nov 26, 2017 6:52 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Rider-Ericsson patent transcribed
- Replies: 6
- Views: 9411
Re: Rider-Ericsson patent transcribed
Rider early Hot-Air “simple” Engine 1875 Patent http://www.google.co.uk/patents?id=fp4CAAAAEBAJ A. K. RIDER. Air-Engine. Patent No. 167,568. Patented Sept. 7, 1875. To all whom it may concern: United States Patent Office, ALEXANDER K. RIDER, of WALDEN, NEW YORK, ASSIGNOR to RIDER, WOOSTER & CO.,...