And another corrective update:
As Martin found out, you get skewed results when calculating the delta using only "water out" temperatures when the flowrate is dynamic. This is exactly what I had been doing. Many thanks to Martin for catching this one.
I corrected all of my calculations to use the average of water in and water out. The actual differences in the results are practically nonexistant though. While the C/W-values obviously all increase a little bit, in relation to each other, there are no noticable differences. The differences in flowrates just aren't that big.
Here's a direct comparison of "old" vs. "new" method:
Old:
New:
As you can see, the difference lies mainly in the scaling of the Y-axis.
Still, the error needed to be corrected, and I'm going to replace all the graphs and of course the data sheet, with new ones.
(EDIT: New graphs are now in place)
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