Thread: Anyone running two IC pumps?
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Old May 4, 2012 | 08:18 PM
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onehundred80
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Default Re: Anyone running two IC pumps?
Originally Posted by tunaglove
"The residence time of the fluid in the HE and IC is the same overall as a slower rate due to the fluid returning quicker to the devices in the loop."

Great explanation!!!!!

" Just remember if the water goes through the HE too fast it will not have time to cool."

Well, that seems logical also..............

These two quotes contradict. Which one is correct?

The coolant is going through the IC just as fast so it will pick up less heat, and thus has less heat to give up when it goes through the HE. The HE will do a better job when the coolant temperature is lower and the flow rate fast enough for turbulent flow. Coolant passing through the system faster will make it more efficient. Going faster still has diminishing returns, fast enough is good enough, balance is required.

The velocity of the coolant has a direct bearing on its heat transfer capacity, too slow and the flow is laminar and allows an insulating slow moving layer of water along the walls, the main stream in the middle runs through and picks up or gives up little heat. A fast moving stream of coolant scours the side walls and prevents the insulating layer.

For example, if you study a slow moving stream you can see silt on the bottom because of laminar flow, after a heavy rain the rushing water scours all this silt away because of turbulent flow and leaves only the stones and gravel.
 
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