[Ralf]

You have to add this feature by yourself as DeltaEC is designed for many different acoustic machines i think.

It is really worth  to look at the papers of Carmen Iniesta, I can look the titles up or send the pdfs to you if you want!

[Ralf]

No, as I think I made it too complex with several connections for pressurization, pressure measurement, pressure balancing and I also want to avoid the tread and use a proper flange solution for  useful later adaptions!
I really have to try the clamping mechanism!

[Ralf]

I calculated thermal penetration depth to 0.5 mm and assumed viscous pd to be similar.
I only estimated gas displacement amplitude which is really not optimal as this is a very important factor because of heat exchanger length!

The length of the engine is typically a fraction (0.5 or 0.25 or 0.125? …) of lambda which is still quite long and I have to experiment further with the feedback loop length/volume.

I increased the length of the coolers because the first ones were only half as long as heater/regenerator just because the heat transfer of the coolers was better.

As far as I know, DeltaEC does not take into account the amplifying resonance effects of the feedback loop and therefore cannot be used to optimize the FBL without additional RPN code.
Carmen Iniesta has written a number of freely available papers on this subject, and I’m not sure whether the RPN modules are in in the DeltaEC code from the book!

 

 

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