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Originally Posted by Cathar
Les, from 2nd hand information given to me, the Thermochill 120.x rads are 24FPI and 32mm thick in the core, with 8mm in-between each flat tube. Tubes are 2mm wide (so 10mm from tube center to tube center).
In comparison, the Honda radiator is 13-14FPI, 29mm thick with 10mm in-between each flat tube. Tubes are 2mm wide (so 12mm from tube center to tube center).
Just wondering how that all fits in with matching BillA's data to the air-flow PD's you're calculating with the other rads. I assume that you've probably already made some adjustments?
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Ta for info.
Was taking the HE 120's to be 50mm thick(from
Therochill with unknown FPI.
Although have been using 14FPI for the Honda it is only a choice of convenience, so as not to conflict with your 14FPI
The P/Q curves calculated for radiators are for the dimensions shown.
"Billa data" is eyeballed "Billa data"
Maybe a simulation for the Serck will.....
Possibly thin thickness can be considered as a "Hydraulic Thickness"
The flow is laminar in all the simulations
Since, here, am only dealing with air-flow have not considered the spacing between tubes.This becomes important when considering the Thermal efficiency of the fins. Like wc the higher h(conv) the smaller the spacing and thicker the fins need to be.Hence included this in post re properties of a 240x120x12.5mm,30FPI x 0.1mm fin 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"
Edit: The Finning Efficiency is for Al Fins and no allowance for tube thickness.
For Cu Fins ~90%(8 tubes) and ~20%( 1 tube) - rises to ~ 95% for 12 tubes.