to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Subject to disclaimers.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/2.5CC BY 2.5 Creative Commons Attribution 2.5 truetrue
You may select the license of your choice.
Action of a Stirling Engine
1. The displacer piston (2) has moved most of the gas to the hot heat exchanger, as a result the gas is heated up and expanding. The power piston (1) is being pushed away, this is the power stroke.
2. The heated gas increases its pressure and pushes the power piston along the cylinder towards its bottom dead centre (BDC). Meanwhile, the displacer piston is moving the heated gas to the cold zone.
3. The heated gas is cooling down, decreasing its volume. The displacer piston has moved most of the gas to the cold zone of the cylinder. The power piston is compressing the gas by the flywheel momentum. This takes less energy because the gas pressure is decreasing.
4. The cooled gas has decreased its volume and pressure, the power piston is at its Top dead centre (TDC). Meanwhile, the displacer piston is moving the cooled gas to the heated zone, so the gas can heat up and expand again, pushing the power piston away.
Animated version. In this example, the power piston lags the displacer piston by 90°. In this design the displacer piston shaft passes through the power piston in a gas proof sleeve.
Captions
Add a one-line explanation of what this file represents