Can Stirling engine, wood frame

[petkfg]

Hi.Thanks for your reply. Great help!!! But I have some doubts: 1. How can I check if the thermo is working? I can do some specific test? 2. The top tube coming out of the water jacket must be dipped in water bottle, or can I leave out of the water? (check the output of water on this could indicate that the mechanism worked, or not?) 3. The process does not begin immediately right? Only when there is a significant temperature (yes or no? Lol) What is the temperature, approximately? Thank you :)

[approtechie]

@petkfg 1) you can put a few drops of food coloring in the water bottle to see the hot water rise up the tube. 2) the top tube MUST be in the water or the flow won't work. 3) the process takes a few minutes to get going. When the water boils you'll see bubbles come up the tube. Check out my video "Stirling engine, thermosyphon water cooling, lit by LED's" and you'll see the hot water entering the bottle and bubbles rise up the tube.

[petkfg]

Hello! Would you could tell in practice and theory as developed in the cooling jacket? I think it is from the siphon effect, but I'm not really sure if it is. Could confirm? And if so, explain how to proceed to make one that works the same as yours? I'd like to know because I liked to include them in Stirling engines I have developed and it seems simpler than using a pump, ( and I do not have this pump). lol Thank you for your attention and sorry for the inconvenience.

[approtechie]

@petkfg You're right, it does use a thermo-syphon effect. The tube coming from the top of the water jacket connects near the top of the bottle; the fube from the bottom of the bottle goes to the lower inlet of the water jacket. You have to make sure that the upper tube is rising along its whole length, with no low spots, or else the hot water won't be able to rise up the tube as easily. This works very well but you have to monitor the temperature of the water in the bottle and not let it get hot

[MsGraziano10]

how to make a stirling engine (you spiegarmii as you did) please do thanks

[technology49]

The displacer mustnt be tight,right?

[approtechie]

@technology49 Correct. A standard displacer piston pushes the air back and forth PAST it, so it has to have an annular gap for the air to pass. In my case I'm using a moving steel wool regenerator instead of a displacer piston, which lightly brushes the sides of the cylinder, forcing all the air to pass THROUGH the wool.

[PyroEvil]

Can you give to us some specs and some constructions tips to build a engine with this power.Like displacer height, piston and displacer stroke ... etc. I'm really impressed by your stirling engine!

[approtechie]

@PyroEvil Thanks! Displacer cylinder is 2.75 in. diameter, 5.25 in. long, made from stainless steel water bottle. Displacer is 3 in. high and fills the diameter of the cylinder, has a stroke of 1.5 inches. Diaphragm has 2" diameter, .75 in. stroke. Large tuna can water jacket and heater shroud, smokestack is rolled up soda can metal, passive thermosyphon water cooling in this version. Cylinder is pressed and sealed onto wood base which has a groove cut to the right diameter. Hope this helps.

[PyroEvil]

@approtechie thanks a lot ! I don't know if is because you find the good proportion between sizes or you contruction is perfectly done but I'm alway impressed how fast and strong is you engine when a see you video again and again.

[cosminx2003]

that's pretty cool, can you make some tutorials or something about how to get done the parts for it ? like pistons, cylinders, diaphragm .. i tried to do a stirling engine using cans but i failed cuz they didn't fit perfectly..

[approtechie]

This engine is quite similar to the one in my other video "Pop Can Stirling Engine #3 - 1065 rpm" where I show some photos of how it was made. This engine is slightly larger, with a 16 oz. can instead of a 12 oz. one, so there is more steel wool and the stroke is longer on both cranks.

[cosminx2003]

i've watched that video, now i see how you make the piston.. but where do you get the steel wool?

[approtechie]

@cosminx2003 I buy a bag of #0000 steel wool from the hardware store. I take a single pad of it, unroll it, then re-roll it on to the displacer rod, but not tightly, just loose so there's not too much resistance for the air to go through it. If necessary I trim it to fit with a scissors so there's little friction on the sides. It should fill all the volume allowed by the stroke of the displacer rod so you minimize dead space.

[paulie1982]

Good work, that lady is quick and strong!!!

[PyroEvil]

Wow ! Great work !

What did you do to get this speed and this torque?

Congrulation !

[nitrozil]

Great Work! This engine is running very fast with high torque.

[GerbilEssences]

@nitrozil Yup, it's a beast alright :D