Will 2x d5's be enough?

[The Weedman]

Will 2 d5's be enough for 12' of tubing with a 3'-4' climb and 2 water blocks?

The blocks are fusion v2 + mcw80 and there is no radiator.

I was thinking of getting tops for the pumps but if they can handle it stock i may not bother.

[DarthBeavis]

there is no radiator.

?? please explain

[The Weedman]

?? please explain

Its an ambient chiller with a 45l cooler res.

[DarthBeavis]

series or parallel?

[Martinm210]

Will 2 d5's be enough for 12' of tubing with a 3'-4' climb and 2 water blocks?

The blocks are fusion v2 + mcw80 and there is no radiator.

I was thinking of getting tops for the pumps but if they can handle it stock i may not bother.

So is this a closed loop or something like a bong cooler?

If its a closed loop the climb does not matter (energy lost in lift is returned on the down return) Potential energy is essentially canceled and can be ignored.

Also the 12 feet of tubing is a minor loss and can also be ignored for the most part. In a closed loop, a single D5 would even be plenty let alone two. An open system like a bong cooler is different though...there you do have to think lift, because the energy on the shower down is in the open air and completely lost.

[WhiteFireDragon]

lol 2 blocks... i don't think any invented pump is not strong enough for 2 blocks and tubing. the tubing is rather long, but tubing is as free-flowing as you can get. one pump is enough, with still plenty of headroom.

[DarthBeavis]

So is this a closed loop or something like a bong cooler?

If its a closed loop the climb does not matter (energy lost in lift is returned on the down return) Potential energy is essentially canceled and can be ignored.

Also the 12 feet of tubing is a minor loss and can also be ignored for the most part. In a closed loop, a single D5 would even be plenty let alone two. An open system like a bong cooler is different though...there you do have to think lift, because the energy on the shower down is in the open air and completely lost.

What pump would you recommend for an 8' bong cooler?

[Martinm210]

What pump would you recommend for an 8' bong cooler?

I'm not experienced at all in bong cooler designs, but one D5 is barely enough to overcome the potential energy loss.

With an 8' bong cooler, you automatically loose 8' worth of pressure head off the pumps performance curve.

In the case of a single D5, 8' of head= 3.5PSI, so the resulting performance curve you would get would be the standard D5 - 3.5psi across the curve.



You basically have just a bit more performance than a D5 at setting 2 left to overcome the restriction in the nozzle head plus tubing.

Considering most household shower nozzles are designed to operate at considerably stronger 40-80psi ranges, that 1-2 psi left by the single D5 is pretty sad to say the least.

The problem with figuring what pump to use is the huge negative heat dump effect. From the little I've read on bong coolers, even fairly large ones have trouble dissipating very much heat.

If the cooler itself can only dissipate 100 watts at a 10C delta, adding 40 watts worth from two pumps is going to eat into the equation fast.

You're probably better off not trying to atomize the water droplets through pumping power, and focus on some sort of internal medium to force an increase in water/air surfacing.

Aquariums use bio balls to do basically this same thing except they are trying to grow "Good" bacteria in there...not really what we want, but it would probably work as well or better than a nozzled shower head.

If I was going to build a bong cooler, I would try some smaller sizes and fill the whole tube full of these if you could afford it. That or maybe come up with some sort of substitute that's cheaper.



I bet something extremely efficient like the aquarium bio balls would probably make the whole contraption many time more efficient than what people are getting from a regular free fall showerhead effect.

Just no way to make household pressures with DC pumps at reasonable heat dump levels.


Side benefit is there's no denying your PC has BALLS...


It would be cool to try, I just don't think you could ever really make one that you'd be willing to put up with long term. Too much maintenance...

[Waterlogged]

What pump would you recommend for an 8' bong cooler?

DB, If your serious about a bong cooler, I recommend you head over to OCAU and see if you can coax AussieJester to re-post the pics for his bong cooler build , and maybe even get some insight from him. It's one of the better bong cooler designs I recall seeing.

It's a little bigger than this pic shows.

[The Weedman]

It is a sealed system. Glad to hear i should have no problems. Thanks for all the input guys.

[antiacid]

I'm going with martin here, 1 d5 is plenty.

[The Weedman]

I am actually only getting about 1gpm with both d5's in series. I have a ek 150 res inline just before the second pump, could that be causing the low flow?

Does the distance between the pumps in series effect flow? There is about 5' of tube and the res between mine.

[NaeKuh]

how is a bong cooler a sealed system?

Im lost.. do you have some kind of evaporator / condensor / collector?

Or we talking about a massive beer keg which you plan to drop underground and pull geothermal from?

A 2 x D5's would have no problem in the situation you described, but u got all of us facinated in your cooling circuit.

Im going with the dual D5's for pure redundancy in a system like this.
Seems like your gonna invest a lot in the cooling end, you might as well add insurance incase pump failure.

[The Weedman]

lol I said nothing about a bong cooler. It is simply a custom built chiller with a 50l cooler with 45l's of water. The first pump is fed from the drain port of the cooler and the return is in the water with the cooler sealed.

The water is kept within 5c of ambient depending on humidity.

[NaeKuh]

ahhh id go with dual d5's as i said for pure redundancy.

[The Weedman]

The problem is that i am only getting 1gpm with 2 d5's.

[NaeKuh]

The problem is that i am only getting 1gpm with 2 d5's.

have you considered a D5 strong then?

they use those on solar setups.

[Martinm210]

I'm curious too...we need some PIX!...

Suprised that's all you're getting though, something is different. As far as I can tell you should be seeing over 2GPM with stock D5s

[NaeKuh]

well the only other pump i can think of stronger then a D5, would be an RD-30.

Or how about a fish tank pump? like an aquarium pump? And have the pump external next to the chiller.

[The Weedman]

I cant take pics right now but i will try and explain the loop in more detail.

Res to d5, up 4' to top of case thru fillport to ek res, d5 to fuzion v2 45deg rotary inlet and outlet, out to mcw80 to second fillport next to 1st fillport, back down 4' to res. Sorry for the ridiculous sentence.

I would estimate the tubing to be closer to 14' but that shouldnt matter.

Im thinking about this pump http://www.goreef.com/Little-Giant-3...p-700-GPH.html

[SiGfever]

This is a beast of a pump but you will also need a power supply.

http://www.jab-tech.com/Iwaki-RD-30-...p-pr-3849.html

http://www.performance-pcs.com/catal...ducts_id=26144

[Waterlogged]

If there is air in the EK150, that could be causing the low flow rate as air compresses nicely and will rob pressure from the system.

[Captain_Harlock]

Now I dont want to post info here that would break forum rules, but I have some access to "higher end" pump equipment. Manily because its my family business (I left it many years ago though). In fact, when I got back into watercooling a couple of years ago I found out that we had dropped our Iwaki line as they werent selling (we deal with industral and government needs), and {I'm scared/saddened to say this part} threw away an entire wall of RD20's, RD30's and several other of their larger units. They simply were not selling and I am not the one who did it, so dont blame me. Anyway, I dont see to many posts on here that show a need or want for the higher end equipment we sell, but this one drew me in. I know we cant post ad's for products and services here and since the company is not open to the general public it really doesnt belong in the Official Manufacturer Information & Support section. This isnt an open invite for everybody to start PM'ing me with questions, but if its allowed then I will post a link to our site for everybody to look over and decide if anything could help with such radical builds.

I've decided that my watercooling needs simply dont need any of the pumps we carry as I only do CPU and chipset cooling. So I've never tried any of them out for that purpose. Most are for very persice pumping and need special metering controllers and valves that we sell as well. But members like Waterlogged, Skinnee, Martin and others who have a far greater degree of knowledge of flowrates, head perssure, and everthing else related could at least decide if anything we sell could help in these types of builds. So let me know if I should just edit and delete this post or if linking in this instance is something I can do.