So, you didn't test with your system increasing the flow rate to match (which can probably be done by end users) OR so that flow rates are higher on both above your current test.

What I'd like to see are the results with:

1. The same flow rate for each block
2. The flow rate increased for each block by say 50%

Seems that should be simple to do since your system gives you so much control. I'm not knowledgeable enough to know if there's a threshold where say increasing flow rate has little effect... and if the low flow on your Koolance numbers is below any theoretical threshold for the koolance block...

In other words I wonder if the temperatures might compare differently at a higher flow rate?