I don't believe that flow rates will affect cooling in the long run. The reason being is that it isn't how slow the water moves through the radiator, it is the total length of time that the water is IN the radiator. A slower moving pump and a faster moving pump have EQUAL lengths of times that the water is in the radiator tube. How do I know this? It is simple really. Just figure out the flowrate and the length/volume of tubing and use a simple mathematical formula. Despite the fact that higher flow rates travel through the radiators faster, they will be traveling through the radiators more often. This is a simple way to explain the reasoning behind my explanation. Keep in mind though, that this applies if the radiator is not a cooling bottleneck to the system only.
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ondaedg@procooling.com
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