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Vegetable oil stirling engine

Note (?)
Difficulté (?)
Durée (?)3h 0 min.
Coût (?)~15 CHF
Languefrançais deutsch english
License (?)
Building a vegetable oil stirling engine helps to demonstrate different scientific properties:
  • Expansion and condensation of the air under the influence heat
  • Principle of operation of a piston
  • Conversion of thermal energy into motion
  • Use of a bio-fuel

This DIYs shows a simple prototype of a stirling engine. It operates in a similar way than a steam engine but with air instead of water. This technology is known for a long time but has never really been used on a large scale even though theoretically it has a good energy efficiency.


This DIYs project is also an opportunity to introduce the controversial bio-fuels topic and explain the current limitations of this solution.




Nail the two wooden boards on the sides of the MDF block (at 1.5 cm from one end).   ...
With fast two component glue, fix an M6 nut at 7,5 cm of the opening of the test tube .   ...
Glue two small pices of wood in the centre of the rear board with at a distance between them c ...
Cut the back of the syringe to create a simple tube.   Cut the water bomb balloon an ...
Drill the test tube stopper with an M4 bit. Pass the rigid tube through the stopper until it rea ...
Attach the flexible tube to the syringe and stopper.
Screw 2 small electric connectors in the center of the top of the side boards.
Wrap a tube the rigid wire to form a kind of spring with a diameter slightly smaller than the ...
Position the test tube in the center of the two connectors and cut the wire before the 2nd scr ...
Position the syringe on the back board using 2 large rubber bands.
Build an oil lamp by punching a hole in the metal lid of a salt cellar and pass through a flat ...