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Originally Posted by unregistered
when you define 'W' that way for rads, do you understand the needed resolution/accuracy ?
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I do. However, given typical radiator performance levels such can be commutated to a fair extent by increasing the heat load. Unlike waterblocks, can quite happily supply most radiators with a 500W heat load and then even 0.01C accuracies are no longer as essential for an acceptable degree of error margin. Doing so also makes the quantification of secondary losses significantly easier to observe. Might then start to consider the variations in the thermal properties of the coolant with respect to its temperature, but I can't see this being terribly significant given that people operate their systems ranging from 10C-40C ambients anyway. Regardless, when testing and developing we're concerned with the relative differences in radiator performance, and the relative difference is going to be very close, if not identical, regardless of a 100W heat load or a 500W heat load and the associated coolant temperatures that go along with that.
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why do you not wish to characterize the wb heat load the same way ?
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Not sure I understand the question.