Search found 3297 matches
- Thu Jul 05, 2018 6:22 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
The reason these must be regenerative displacers and not just displacers is that the Vuilleumier cooling effect is completeley dependent on regenerating displacers. https://patentimages.storage.googleapis.com/14/c6/4e/3ae311b6cbee54/US1275507.pdf The patent is extremely interesting. Not only in rega...
- Thu Jul 05, 2018 2:25 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
Is that a double displacer there? and 180 degrees out of phase with each other? Sorry for the crude drawing. The probable timing I've worked out as a starting point looks like this: http://calypso53.com/stirling/phase.jpg Also, the connections are adjusted so that the dispalcers (regenerators) just...
- Mon Jan 22, 2018 5:30 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
I've gotten as far as some drawings and ordering parts. It may look something like this:Ian S C wrote:I only have one thing to say on this type of technology, build it, and demonstrate the proof.
Ian S C
- Sat Jan 13, 2018 9:29 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
Wellington wrote:Tom Booth wrote:According to an article by......
hello tom. can you provide a link to the material you reference. thanks.
http://www.unz.org/Pub/Century-1900jun-00175
The relevant sections start around page 200:
"A DEPARTURE PROM KNOWN METHODS—POS-SIBILITY OF A "SELF-ACTING" ENGINE..."
- Fri Jan 12, 2018 4:38 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
I think the question hinges on what actually goes on in the inner workings of a heat engine. The predominant view had always been and to a great extent still is: for a heat engine to operate heat entering the engine must pass through the engine and out the other side, much like water passing through...
- Mon Jan 08, 2018 7:20 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
I thought I might mention something I've been working on recently and am also curious to know if anyone else here has ever heard of it or done anything with it. https://en.m.wikipedia.org/wiki/Vuilleumier_cycle This "heat pump" is quite interesting. I think the patent is quite facinating a...
- Sun Aug 20, 2017 10:00 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
Removing heat from the ice is really not a correct statement. If you study how a heat pump or refrigerating system actually works, it is more like the heat is removed during compression of the gas refrigerant. In those days refrigeration was accomplished by compressing air. The old "Cold Air Ma...
- Sun Aug 20, 2017 9:43 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
Tom I have run my LTD motor on ice, the ambient temperature was 20*C, so there was a 20* (a little less) temperature differential. The but is the amount of energy required to make the ice. You certainly make a valid point. Energy is required to make ice in the first place of course. As quoted above...
- Fri Aug 18, 2017 7:08 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
OK, so lets say you CAN get a Stirling engine to run on ice with NO or VERY LITTLE waste heat reaching the cold side of the engine. I'm theorizing that a Stirling can possibly be designed in a way where it might not contribute much if any heat to melting the ice,.. might even contribute to keeping t...
- Fri Aug 18, 2017 2:07 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
Here is why I think this can possibly work. Take a lamina flow type Stirling. Lets say at point "a" of the cycle, air in the cylinder is expanding and pushing the piston out. At some point pressure inside the cylinder and atmospheric pressure outside the cylinder will equalize. But the pis...
- Fri Aug 18, 2017 1:40 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 181669
Re: Tesla's "Ambient Heat Engine" Experiment
I think this is a significant update. I submitted the idea discussed here in this forum to a recent National Geographic Magazine contest. It got through the initial screening process. I've purchased a metal lathe, drill press and other tools and just recently got lucky in finding a place where I can...
- Sun Oct 16, 2016 3:09 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18651
- Sun Oct 16, 2016 2:57 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18651
Re: Tesla's Heat Engine
Sounds to me like you are talking about a variation on what is currently known as an "Air Source Heat Pump" I can't say I understand it well enough though, to do the maths to check whether it is theoretically possible or not. Well.. I think "air source" just refers to where the ...
- Thu Oct 06, 2016 6:02 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Burnt pancake displacer (carbon foam)
- Replies: 10
- Views: 14210
Re: Burnt pancake displacer (carbon foam)
Some interesting info regarding the heat conductivity of various carbon materials. Very variable depending on how it is made. Interesting that pyrolytic carbon is or can be MORE heat conductive than copper by a factor of 5X. http://www.christinedemerchant.com/carbon_characteristics_heat_conductivity...
- Thu Oct 06, 2016 1:58 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Burnt pancake displacer (carbon foam)
- Replies: 10
- Views: 14210
Re: Burnt pancake displacer (carbon foam)
One other thing. It's quite possible that starch is not the culprit as far as chalkiness goes. Possibly the opposite as some bread recipies call for added corn starch to make the dough more plastic and give the bread a better texture. The corn starch heated with some water seperately to make a goo w...