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cross flow radiator

Oinq
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As some of you (90 views at date) might have read, I'm asking help on the below topic about the radiator I should use:

 

While I ask searching for help, I noticed a thread that already was going on the direction I was looking for but I noticed some info I consider wrong, or I don't understand:

 

Because necro posting on this forum is not well seen (as I learnt after removing mine and following posts), here above I link the old thread.

 

It's referred there that a cross flow radiator is half than a dual pass, as the liquid is cooled once and in a dual pass twice.

 

I consider this sentence wrong, since indeed is only cooled once, but is cooled once over double the area.

 

 

Am I wrong? Is a cross flow really half efficient than a dual pass?

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If you have 2x rads that are both the same dimension in hight,  width and thickness then no. It would be fairly even. A cross flows side tanks would be 2x the size of the duel pass side tanks. So instead of having say 500ml flowing back and forth in a duel pass, you'd get a litre in the same time span in the cross flow.

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10 minutes ago, Oinq said:

-SNIP-

It makes little to no difference since the rate of flow through the loop is so quick and the cooling space itself is essentially the same. 

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I have 4 Cross flow rads in my build. I have never had problems with temps. I had to use them due to how I built my case. 

 

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No, the guy is wrong.

Even though it only passes through once (aka half the distance) it is passing through double the number of pipes in the radiator because it doesn't have to go to one side and then back.

Twice the number of pipes = twice the cross sectional area = half the velocity.

So even though it goes through only once, it spends twice as much time in the radiator.

 

The performance is therefore almost identical to a non-crossflow radiator.

 

This can also be seen from the amount of surface area, which is what does the cooling, and doesn't change whether it is crossflow or not.

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Yea basically everything every one else said.   The limiting factor is how well the rad can shed heat with the fans.   Not how the fluid passes through.

 

Manufactures aside of they make a upass and xflow version they should perform more or less the same.

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I regret not getting cross flow for all of mine. I prefer the routing option and much easier to drain more of the loop if I had them. 

 

Performance will be the same as it’s still the same concept. 

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