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How to restrict flow in my loop?

post #1 of 7
Thread Starter 
Okay, here is what Intend to do and I understand that not everyone will agree but that's okay.

My 3 GPU's will run in parallel. It's been done many times and nobody expects problems there.
But I also want to run my CPU, mobo, and MOSFET in parallel. The problem is that, unlike the GPU's, those blocks don't have equal restriction, and they don't require an equal amount of cooling either.

So I will need to fiddle with it. I expect the CPU will get most of the water while the mobo and MOSFET might get less, and possibly not enough water..... if any.

So in that case, I will need to restrict the flow to the CPU. What I would like to find is a valve, or a tap I can adjust for at least 2 of the 3 branches. That way, I could control and adjust how much flow each block is getting.

I just don't know where I could find such a valve or tap. Any ideas?
Anyone knows of a way to adjust the flow to each block?

Thanx and cheers cheers.gif
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post #2 of 7
May I ask the reason why you're going with parallel instead of just running everything in serial to get equal water supply?


There should be some kind of inline filter around capable of doing this for you, but it'd be damn hard to balance the flow or estimate how much restriction you need.
post #3 of 7
Thread Starter 
I want to get mobo and MOSFET blocks.
But those tend to be very restrictive.
So a parallel set-up would counter that.

Plus I like to tinker and experiment with stuff not normally done.
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post #4 of 7
Get a bitspower value and open/close as needed...usually used for easily draining loops but yeah...

personally think doing that is silly, but so be it, haha.
 
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post #5 of 7
If your worried about the blocks being to restrictive and not enough flow getting to your cpu, I don't think making your cpu like more restrictive would be your solution. With parallel lines each line is at the same pressure, a lower pressure than series, but your flow to each line will be 1/3. Anyways it would be a balancing act between the performance of your pump and the water blocks to figure out which is better.

Now I got that out of the way, a simple way to restrict your flow would be to use a flow control valve that you can get from industrial suppliers. They are ugly so you would have to find a way to hide them, they don't need to be in any relation to the water block as each new resistance in the line just adds up, pretty much like voltages in a line. If you have good enough tubing you can always "pinch" a line to a curtain degree and that will restrict flow, or finding a place to reduce the diameter of the line. Another option that is more discreet is to get a bunch of different density meshes and put it one of the fittings in your cpu line to balance things out.

One thing I am curious of is how your measure the flow from each block to make sure they are equal? I will not say this wont work, it just might be a lot of hassle to get things right. Good luck! cheers.gif
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post #6 of 7
make another small loop for the mofset, motherboard and ram maybe? wouldnt be that much more
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post #7 of 7
Thread Starter 
Quote:
Originally Posted by SDH500 View Post

If your worried about the blocks being to restrictive and not enough flow getting to your cpu, I don't think making your cpu like more restrictive would be your solution.

It's the other way around. The CPU block would be the least restrictive so the water will likely flow to the CPU, neglecting the other two. Water, like electricity, will try to follow the path of least resistance.
Quote:
With parallel lines each line is at the same pressure, a lower pressure than series, but your flow to each line will be 1/3.

That would be true in the case of 3 GPU's in parallel because all 3 blocks are identical thus they offer the same resistance so the flow to each of them should be fairly equal. In my CPU/mobo/MOSFET parallel, they are all different blocks with different restriction level. I expect without adjustments the most restrictive of the 3 will barely get any flow.

[quote} (...)as each new resistance in the line just adds up, pretty much like voltages in a line. [/quote]

That is true if you put everything in line: each obstacle reduces pressure.
But in a parallel loop each branch, in fact, helps the flow and the pressure.
Quote:
One thing I am curious of is how your measure the flow from each block to make sure they are equal?

The loop will need to be bench tested first. So I put the pump feed in a bathtub or a large bucket. And I put the outlet side of each 3 blocks into their separate empty buckets. Turn on the pump for a minute. Measure the water in each bucket et voila! You have the flow of each block in your parallel.
At first I was going to buy 3 flow meters but that's just silly for something I won't use again.

Ideally, I would like the MOSFET and mobo to get between .02 and 0.6 GPM each and the CPU to get between 0.7 and 1.2 GPM
Quote:
it just might be a lot of hassle to get things right. Good luck! cheers.gif

Like I said, I like to tinker. I think some others here can relate to that.

Cheers cheers.gif
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