Stirlingengineforum.com

heat is in a sense literally disappearing. That is, the heat is being converted to electricity by the load on the engine. Assuming the load is an electric generator. Right on. One of the laws of thermal dynamics. Even without a load. Work is being done except the load is on the friction of the slid...

Because energy is present everywhere (except when it is absolute zero). Heat is only one form of it. Keep in mind, they are saying almost 100% is lost through heat, but not 100%. The rest stored in the form of entropy. When you release the gas, the gas gets back some of the lost heat from the conta...

That's interesting Ian. It indicates that the longer dwell of the working gas at the cold end when the engine slows under load has a bigger effect than the longer dwell of the working gas at the hot end. I wonder if it would be a different story in a pressurised engine, where there is greater molec...

If you run the engine without load so that the hot cap is red, then put on a load without changing the heating the temperature will drop, may go from red to black heat as the heat is transferred to the cooling system ... I hope you don't mind my abbreviating your statement but the part above is a v...

I find this interesting: There are several sources stating that as much as 100% of the electrical energy used to compress air in a conventional air compressor is lost as heat and that most of that heat is recoverable. " as much as 100% of the electrical energy used by an industrial air compress...

derwood wrote:First test run video.
http://youtu.be/wtW9fYVFXOY

Wow! looks like it has quite a bit of power.

Have you tried putting a load on it yet?

It would be more interesting to see the same thing on an alpha stirling. See the location pressure builds up where it shouldn't be or the speed of the gas when it goes through the transfer tube. Yes, or how much heat the regenerator is absorbing and releasing... I suppose whatever engine would need...

I'm not at all sure what you mean here by "lagging the cold sink". What we need in order to complete the Booth cycle is something that will absorb the heat energy from the gas. Unfortunately that has to be a sink that is colder than the gas. I believe it is impossible to have a heat engin...

Thanks!!!

Looks like that should be possible as a DIY project.

Schlieren Photography - How Does It Work?

Thought i would post a video of what I have so far. It's a short vid because I could not find my memory card to the camera. I think maybe the stroke is to long. Think I will try a shorter stroke with the same compression ratio. The piston is 3.36 in. and the stroke is 3 in. I also think it has some...

Yes, I agree with you. some cooling is taking place in the piston cylinder. When the gasses expand they are cooled, no doubt about that. I am just saying that if you look at this engine from an enertia point of view that the cooled gas does not contribute much to pulling the piston back in. Enertia...

Tom, I think you are very close. You are explaining a pulse jet without knowing it. When the gas returns to the heat chamber the piston assists in this return. cooling in the piston cylinder is not what causes the piston to be pulled back in... In regard to the Lamina Flow Stirling. (I still haven'...

same here, I agree with some of Tom's conclusions. Pyrex is the last thing you would want to use for a cooling cylinder... My point or idea as far as using Pyrex or possibly ceramic or something non heat conducting is that I think that this type of engine, (Lamina Flow) works on a different princip...

In fact, I think I would try this: http://calypso53.com/stirling/material_2.jpg The reason I think that the engine with a heat conducting power piston cylinder wont run until it gets hot is that once hot the heat in the gas cannot be dissipated. In effect, the heat, once the cylinder gets hot acts a...

...One thing I have noticed is that with all of my attempts the engines did show signs of running but only after the entire engine got extremely hot (piston cylinder too). I have been using all steel construction making sure to use very thin steel for the heat chamber. I now realize that material s...