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The Vuilleumier device is very similar to a Stirling engine, or Stirling cooler, except that it has two regenerative displacers. Like a Stirling it has a hot end and a cold end but it is different in that it takes in heat or absorbs heat from BOTH the hot end, as well as the cold end. So while it ru...

I have a slight issue or problem to work out with the experimental TWO DISPLACER engine I'm experimenting with. I want to try and at least ensure that it will run on a cold sink (ice rather than applied heat) and have every advantage I can give it. To that end, I thought counterbalancing the displac...

Interestingly, after I started working on this around Christmas, the design based on a cookie tin, I came across this video where someone built a Stirling using the same cookie tin. He is supplying a lot of heat from a gas stove to run the thing though. Getting a similar engine to run on ice and amb...

Assuming you can get 20% mechanical power, @ 180rpm, you are going to need to heat at least 10 grams of air up by 100 degree and cool it down again in every cycle. my 2 c I've been wondering about this for a long long time, the "cool it down again" part. Not to be argumentative. Certainly...

Hello, ... I also work on a stirling engine which operates at low temperature. I'm on my sixth prototype and it's starting to work well. Are there people who are still working on the same subject? Rafik Do you have any pictures or videos of any of your prototypes? I am always interested in any kind...

For anyone who might be interested, I have found myself with a few weeks of free time, so I have been working on building, or trying to build the combined Stirling engine / Vuilleumier heat pump, or Tesla "self acting" heat engine described earlier. It is intended as a "Stirling Engin...

I can't imagine turning some old frying pans into a Stirling Engine without some kind of machine shop.

Ian S C wrote:The one way to see if it actually works is to build it, and try it out.
Ian S C

Very True.

I like the engine you posted earlier:



I was wondering what it cost to build. Including time, material and any necessary workshop equipment etc.

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...

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...

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

I've gotten as far as some drawings and ordering parts. It may look something like this:

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..."

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...

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...

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...