solar stirling engine water pump

This is a solar heat powered water pump, made by some simple parts. Funny and simple to build. It run here at about +73C degrease at the top of the black painted saucepan (and ~+55C at the "heater", 4cm down on the side wall) and the pumping coolant water is about +18C degrease. The displacer follow by nature close to the ideal carnot profile and the cold side (below displacer body) is filled with isothermalized finns made by aluminium plates from cola cans. The pump power is her produce 1liter water on 30seconds at 0,5meter pump hight. This unit contain only 1 "one way" valve. This displacer body is made of styrofoam. Se also animation at "simple solar stirling water pump working principle" olle_welin@hotmail.com

Category:

Science & Technology

Tags:

• solar
• liquid
• piston
• stirling
• water
• pump

[ranyerebrc]

I wonder if there is in the market, some of this equipment for sale? I personally know 2 of Sunmachine bominsolar and both still in research and not commercially available.

This equipment is of great interest to my region of northeastern Brazil, a semi-arid and poor.

[Nissearne12]

I am doing this on my free time so I have only a little time avalible to make small reserch step each year. My plan is to make a new small more optimized modell engine soon. The promising thing with this construction is that the displacer follow close to the ideal carnot profile and the cooler have a very high contact surface area plus the engine run at slow frequancy all this things make the termodynamic process more efficiant.

[OleTC]

Oh and one other thing - the surrounding water-container, is that just to maintain constant water-level without water escaping the working cylinder through the fitting and cylinder at the bottom?

If so, I believe, I understand the whole thing.

Thank You.

[Nissearne12]

Yes that is right. The water goes around. The hole system could be submerbed in a sea as well.

[OleTC]

Thank You. Again, this is very good.

[OleTC]

Bravo. Very ingenious and impressive. Would another 1-way valve between return-bucket and working cylinder ruin the cycle? Or would it just run with longer and slower strokes?

Best

[SWINGREGORY]

We don't see very well the Stirling motor