The Ringbom engine concept published in 1907 has
no rotary mechanism or linkage for the Displacer.
0
2
Thus a thermoacoustic device typically does not have a Displacer, as found in a beta or gamma Stirling.
0
3
Again, the following diagrams do not show internal
heat exchangers or a regenerator, which would be placed in the gas path around the Displacer.
0
4
Again, the following diagrams do not show any
internal heat exchangers or a regenerator, which would be placed in the gas path around the Displacer.
0
5
The Displacer piston is a loose fit
and does not extract any power from the expanding gas but only serves to shuttle the working gas between the hot and cold heat exchangers.