Quote Originally Posted by relttem View Post
That is exactly true, but not all radiators can provide that necessary delta, therfore they are limited. All radiators have a specified heat load that they max out at..

it all goes back to

mdot*Cp*(T2r-T1r) = h*A*(T2-T1)

again, h, is related to the air speed, but it has a limit. So, when that has peaked out you only have one option left and that is to lower T1. T1 is going to be your ambient temp, so it can only go so low in practical cases. Sure you can run cooled air thru the radiator, or Nitrogen gas etc, but in practical systems it will be ambient. So, the equation part on the right hand side is maxed out and will equal X Watts.

Now, we move to the left hand side. Cp is constant. T1r, mdot and T2r can/will vary. Mdot will max out due to pressure drop thru the radiator and pump limitations. Now, if we keep pumping heat into the system, T1 goes up and T2 goes up, thus the run away system
I don't need a lesson in the math. I was referring to your statement that the heat load doesn't matter. I was pointing out that it does have a factor in the time it takes for the system to reach equilibrium. Something you ignored and instead decided to launch into yet another pointless lecture.