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duel pumps

post #1 of 67
Thread Starter 
Hi,

was wondering if it's possible to have two pumps in the same loop to increase performance? I have two laincg ddc pumps, ones an older revision with less flow than the other, but I thought maybe I could put two together for some benefit?
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post #2 of 67
Dual.

Yes it is possible to run two pumps in series.
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post #3 of 67
Yes you could.

2 seperate loops might be better althought because if there flow in't matched it might cause turbulence cavicating...

Its not ideal if the flow is different but i BELIEVE it will be better
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post #4 of 67
you need 2 of the same flow rate pump, Ira has 2 ddc-1's i believe in a series, it increases head
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post #5 of 67
sell me the older , the one that pumps stronger would probably force the older to run faster decreasing its life. the only benifet(sp) i can see to running dual pump is if one goes out the other might be able to keep things going long enough for you to notice
post #6 of 67
Quote:
Originally Posted by Skullzaflare View Post
sell me the older , the one that pumps stronger would probably force the older to run faster decreasing its life. the only benifet(sp) i can see to running dual pump is if one goes out the other might be able to keep things going long enough for you to notice
OFFTOPIC: you should stop requesting things like this. You will be infracted for it
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post #7 of 67
Yeah, two identical pumps in series will increase the pressure head. It essentially stacks the two PQ curves to give you twice the head power per flow rate, maximum flow rate remains the same. The end result rule of thumb is around a 30% increase in system flow rate.

The only time running them in serial is an advatage is extremely free flow low pressure conditions where you can take advantage of the low end of the curve and stack the flow rates together but that really never happens in a PC cooling system.

Also keep in mind that it also adds a small amount of heat dump from the additional pump.
    
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post #8 of 67
hey artin, my MCR320 is doing a really good job cooling my MOSFETs,NB and 8800. With yate loons on them. How are yours doing?
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post #9 of 67
It does just fine with the loons, the most I've ever seen my water temps is 2-3C above ambient and that's typically when I'm not getting good fresh intake air.

I've got an MCW30 I'm going to add to my GPU loop to cool the northbridge. Later I might make a third loop (NB, SB, Small Rad, DB-1), but this is all I could afford this month. Decided to buy vista(I know..bad idea..) and a few minor WC goods...the MCW30, a UV yate loon, some mcmaster tubing, and G11 blue dye...going to run one loop blue and the other green..
    
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post #10 of 67
Quote:
Originally Posted by Martinm210 View Post
Yeah, two identical pumps in series will increase the pressure head. It essentially stacks the two PQ curves to give you twice the head power per flow rate, maximum flow rate remains the same. The end result rule of thumb is around a 30% increase in system flow rate.

The only time running them in serial is an advatage is extremely free flow low pressure conditions where you can take advantage of the low end of the curve and stack the flow rates together but that really never happens in a PC cooling system.

Also keep in mind that it also adds a small amount of heat dump from the additional pump.

I doubled my flow with 2 18W DDC's in series....I went from 5 psi to almost 11psi..That converted is 1.5gpm to 3gpm..I only dropped 2C by adding a second pump, but thats with just a CPU in the loop...If I had more blocks I'm sure it would of been more...I mostly did it for redundancy....



Take a look at Petra's results...DDC Top & Pump Performance Comparison (Petra's, Radiical, Alphacool, etc.)



Hey I like Vista I've had it since it first came out...I don't game though thats the main complaint I hear from people that is legitimate...
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