Quote:
Originally posted by 8-Ball
I hope this clears things up a little.
|
Not from where I'm standing!
You're example, where you suggests that pumping water around will cool faster, is indicative of the general problem of understanding this issue....you continue to take components out of the system to review their behavior.
Pumping water around and around will NOT cool the water faster. Why? Because of every loop you have a waterblock adding 6 therms of energy to the water!
You will never understand what is happening if you separate the components.
The zero flow example was an extreme. Just like saying that at infinitely fast flow, the waterblock is the same temperature as the water and the water temperature never rises. It simply illustrates what the pertinent physics formulas will tell you.
Finally, when you reduce the temperature of the water, you increase the difficulty in extracting the same amount of heat energy from it. The closer the water temperature gets to ambient, the harder it is to cool it. That's why the benefit from faster flow is countered in the radiator. The water from the block is at a lower temperature, so the radiator will have a more difficult time performing it's job.
The easiest way to see this is to just create a simple hypothetical system and use the heat tranfer formula to see how transfer rates and loads are affected.