I am able to update my question above. I found the Fq variable in the 2007 Code. It does not appear in the 2008 addenda, but the sample in UHX-20.2.1 is not updated. I added the formula for Fq to my Mathcad calculation, so I have that answer.
It appears my sticking point is what number to...
I am making a UHX-13 tubesheet calculation for a configuration b fixed tubesheet heat exchanger. I have entered the math given in UHX-13 into MathCad, and I am not able to match the sample inputs given in UHX-20.2.1 to the given outputs. My results fall apart beginning at the output for the Fm...