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Originally Posted by Annirak
I still maintain that through the judicious use of insulation, a closed system could be made in the coolant loop, and the power out of a conventional CPU could be found, allowing conventional CPUs to be used for WB testing purposes.
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I don't see why this couldn't happen either, if you can measure flow and temperatures (temp differentials at least) very accurately. I may not have followed your earlier analysis completely but here's the way it seemed to me:
One could measure the radiator water temp differential in/out to know how much energy is dissipated there. Also measure the temp differential across the pump inlet/outlet to know how much heat is added (or setup an inuslated closed system previously and measure the temperature increase just do to the pump and friction of the water). Finally measure the block inlet/outlet temp to see how much more heat is added inside the block (mostly presumable due to the cpu, somewhat due to the block friction - this could be attained as well).
And the final check should be
pump_Energy + cpu_Energy = rad_Energy
Assuming no losses through tubes etc....