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Originally Posted by lolito_fr
the die is not a constant temperature source!!
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It
could be considered a constant power source.
I am still very puzzled. There is nothing wrong with the logic, the problem is the point.
I think he means that the components of the system should be selected to not exceed a given die temperature, but be spec'ed as cheap and reliable as possible whilst conforming to this criterion. A high performance low flow block helps achieve this at higher water temperatures - meaning a smaller rad, lower flow pump, quieter fan.
I don't like the way it is presented though.
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When the effectiveness is large, the coolant entering the radiator will be hotter...
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and
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Also, as the effectiveness increases, the temperature rise of the coolant increases.
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leaves one with the suspicion that either he doesn't know what he is talking about or the application doesn't apply to us. The "Effectiveness" is increasing because Q actual is increasing within the framework of constants (i.e. constant die temp) he has selected. Reality is not like that unless the waterblock was trying to cool a large mass.
It is possible that the reader's an idiot.