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Originally Posted by Cathar
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If the fins were just basic flat folds, then yeah - maybe a higher FPI. Would need to keep on eye on the pressure drop though.
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Kryotherm suggests for a 240x120x12.5mm design:
3.7Pa @ 1m^3/min .
h(conv) ~133w/m^2*c and finning efficiency ~80% with 8 tubes
Edit: Finning efficiency ~ 15% with 1 tube