Search found 308 matches
- Fri Apr 08, 2011 6:26 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Ways to increase thermal conductivity of working gas.
- Replies: 17
- Views: 11339
Re: Ways to increase thermal conductivity of working gas.
It would be a nice thing for a low temp engine. For a high temp engine, using a internal heater (heat sink) is much more effective. I personally do not like to use many small heating tubes. It is just too many parts and more likely to have a leak. Now, we just have to figure out how to get the heat ...
- Wed Apr 06, 2011 7:01 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: New Walking Beam Pop Can Stirling Engine
- Replies: 3
- Views: 4759
Re: New Walking Beam Pop Can Stirling Engine
One thing I never figured out is how people attach the PVC pipe to the coke can.
- Wed Apr 06, 2011 7:39 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Ways to increase thermal conductivity of working gas.
- Replies: 17
- Views: 11339
Re: Ways to increase thermal conductivity of working gas.
which it really should be if you are worrying about power, and efficiency. Isn't this why we are working on stirlings. :razz: :razz: The bottom line is. We need to get a lot of heat in to/out of the working gas very quickly. Stirlings are already in a disadvantage as the temperature is much lower t...
- Mon Apr 04, 2011 8:49 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Ways to increase thermal conductivity of working gas.
- Replies: 17
- Views: 11339
Ways to increase thermal conductivity of working gas.
Has been experimenting the said subject and found the results fascinating. Both ionizing and adding a little mercury to the working gas can increase the thermal conductivity a lot. However, I do not have measurements.
- Fri Apr 01, 2011 9:47 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling engine system for home
- Replies: 4
- Views: 4517
Re: Stirling engine system for home
That's really terrible. Hope everyone is OK. Especially the engineering team.
- Thu Mar 31, 2011 7:24 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling engine system for home
- Replies: 4
- Views: 4517
Re: Stirling engine system for home
The earthquake destroyed WhisperGen. Are you serious?
- Wed Mar 30, 2011 6:21 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Is my epoxy piston good enough?
- Replies: 15
- Views: 11377
Re: Is my epoxy piston good enough?
Yes. It does.
- Mon Mar 28, 2011 8:23 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Is my epoxy piston good enough?
- Replies: 15
- Views: 11377
Re: Is my epoxy piston good enough?
Piston is less than a gram in weight. It requires 75 grams of extra weight to slowly push the piston down when the cylinder is sealed.
- Fri Mar 25, 2011 7:16 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Hi there!
- Replies: 1
- Views: 2003
Re: Hi there!
Welcome to the club. I recently made a few JB weld pistons. It should be fine for a low to mid temperature engine. From Wiki J-B WELD can withstand a constant temperature of 500 °F (260 °C), and the maximum temperature threshold is approximately 600 °F (316 °C) for 10 minutes A tin can stirling is g...
- Thu Mar 24, 2011 4:45 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Is my epoxy piston good enough?
- Replies: 15
- Views: 11377
Re: Is my epoxy piston good enough?
Just casted another epoxy piston with a bushing. The piston now falls through without seal and stops moving when sealed.
- Thu Mar 24, 2011 7:52 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: found: plans and research for 100W solar alpha stirling
- Replies: 8
- Views: 11003
Re: found: plans and research for 100W solar alpha stirling
The only way to measure power output is to use a dyno. Everything else is speculation. onecycleDan1990, I initially suspected that engine would produce 100w with that small heat exchanger surface. If you know the material used to make the hot cap, its surface, its thinness (also the temperature diff...
- Thu Mar 24, 2011 7:16 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: found: plans and research for 100W solar alpha stirling
- Replies: 8
- Views: 11003
Re: found: plans and research for 100W solar alpha stirling
Here is a link if you like hype. http://www.superengine.de/e-lebendiges-totvolumen.html That sounds like a thermoacoustic engine. Check this out too. http://www.io.com/~frg/ Just go through their site. I think their claim is way too optimistic. (http://www.io.com/~frg/tac.htm) Their youtube video h...
- Wed Mar 23, 2011 11:35 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: found: plans and research for 100W solar alpha stirling
- Replies: 8
- Views: 11003
Re: found: plans and research for 100W solar alpha stirling
Maybe I missed something. I read the Final Report but never saw any reference about "100w" output. Also, there is no reference to type of gas used in the test and at what pressure; I will have to assume that this engine was tested with air and at 1 bar. The use of internal fins is a good i...
- Mon Mar 21, 2011 5:34 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: New Member
- Replies: 4
- Views: 4672
Re: New Member
The steam people are facing the same problem. As a matter of fact. There are more challenges with steam. Anyone built a closed system steam engine yet?Ferraccio wrote: If you start talking about efficiency....
The transition to more effective solutions is not proportional: it is exponential.
- Sun Mar 20, 2011 3:26 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Is my epoxy piston good enough?
- Replies: 15
- Views: 11377
Re: Is my epoxy piston good enough?
Great ideas.
I got a new bushing. They are cheap. I am just helping my kid for a school project. Mine engines are machined.
I got a new bushing. They are cheap. I am just helping my kid for a school project. Mine engines are machined.