> Do you have any drawings or photographs that can illustrate this
> kind of regenerator?

Gargoyling

        stirling regenerator

gives both a range of images and a number of related diagrams and 
operating
charts

Diagrammatic view of some regenerators

        http://www.nasatech.com/Briefs/Jan99/GIFS/LEW16581_FIG_1.jpg

Page showing both actual regenerator matrix plus some Stirling heat
exchange structures.

        http://www.nmri.go.jp/eng/khirata/stirling/ecoboy/hx/indexe.html

Photos of some NASA "microregenerators"
These are from a cryocooler but the concept and principle of operation
is the same.The regenerator does not "know" which it is in - it does 
an identical
task in each case.

        http://www.grc.nasa.gov/WWW/RT/2003/5000/5490moran.html

NASA flocked carbon fibre (!!!) as regenerator component

        http://sbir.nasa.gov/SBIR/successes/ss/041text.html

Step by step

        http://www.steamengine.com.au/stirling/operation/old/index.html


Many more listed.


        Russell




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