liquid piston stirling engine used gravity

~Russ

liquid piston stirling engine used gravity
« on April 5th, 2016, 09:08 AM »
ok, so this is very interesting because this runs off "gravity/ unbalanced wheel"  effect as well as a heat differential.

from the video

"This engine is built with commonly available materials and uses water vapor as the working fluid and liquid water as the pistons. A vacuum has been "pulled" to evacuate any remaining air. (notice valve on upper tube). This improves the performance considerably. In this example, the upper "u-tube" has been heated with a torch. The delta T between the upper and lower tubes is approximately 30F (17C).

The difference in temperature between the u-tubes creates an unbalanced oscillation between the bodies of water contained in each tube. It is this motion of the combined masses which is converted to rotary motion. The angle between the sets of tubes has been adjusted to make use of this oscillatory relationship. Unlike typical stirling engines, the optimal angle is not 90 degrees. The tilt of the rotation axis is a compromise between keeping the water at the bottom of the tubes and being able to get work from the moving mass of water.

The power and efficiency are quite low, but the design is very simple.

If you would like to learn more about this project and other solar designs, experiments, and observations check out Steve Baer's "Sunspots" and "More Sunspots"."



https://www.youtube.com/watch?v=UrNVj4BG1Ro

http://www.zomeworks.com/research-development/liquid-piston-stirling-engine/

thought it was really cool and i would like to learn more. it dose not say it but it feels like its a self runner? i mean if you start it by creating a heat difference and then gravity takes over. ????? ....

~Russ

Diadon

Re: liquid piston stirling engine used gravity
« Reply #1, on May 1st, 2016, 05:25 AM »Last edited on May 1st, 2016, 05:28 AM
Thanks for sharing as its a really interesting concept to think about.

~Russ

Re: liquid piston stirling engine used gravity
« Reply #2, on May 1st, 2016, 11:12 PM »
yeah its fun!