Quote:
Originally posted by Les
Would have helped if I had looked at the photos of the radiators.
Yes the Big Momma cannot be 1 Pass, and Rad E cannot be 2 Pass(could be 3,5,7 etc)
. For the record the difference between 1Pass and 2Pass on Big Momma .:-
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LOL, was wondering.
Good point on Rad E. Three or five passes may explain the apparently high resistance. (seven or more passes seems odd to me with a 30 tube rad, but could be 4,4,4,4,4,4,6.)
I've been playing around with numbers towards adding a 'barb ID factor' to the spreadsheet. I'm not familiar with the correct equations for this stuff. (Involves someone named Darcy right?)
I've just been fiddling around in Excel trying to match Bill's 2 gpm data from the chart
here. The equation:
dP = .00156 * ID^-5
gives the match shown here:
I like my equation.
It's simple and hits half the points dead on, unfortunately, I have no idea whether there is any justification for it in fluid dynamics.
Les, would you mind detailing how you applied the correction for Big Momma's barbs? Or, rework the spreadsheet to take a barb ID as user input?
Do you think a 'barb factor' should replace the 'overhead factor' completely or only partially?