get this if yer running hot as heat kills mine is running cool & is non-restrive & out in the open air ... but my 2 New ddc's on my torrent build will be in the bottom of the case & this will help keep them cool
get this if yer running hot as heat kills mine is running cool & is non-restrive & out in the open air ... but my 2 New ddc's on my torrent build will be in the bottom of the case & this will help keep them cool
Interesting idea...
Ba da dum dum dum.
I've never seen the inside of a DDC, but what about machining an entire BOTTOM for one? Re-do whatever holds the motor/PCB, everything...
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+1Originally Posted by AndrewZorn
. Those are the parts with the most friction = heat...
Ba da dum dum dum.
I don't think it'd be easy, but if Bei Fei went from idea to final product without even asking us, then it's probably not a big deal for him...
I just don't know if the PCB is fixed to the plastic molding or anything. And you might need to use a layer of electrical tape or something to not get it to short out. But in an aluminum casing, WITH the fan and/or fins, that would be something. I think you could nearly skip the fan with proper fins and mounting system.
Ha, and imagine if someone makes a bottom... then it'd be assumed that when you buy a DDC, the bottom AND top should go. You're just keeping the guts, the pump would be EXPENSIVE to do 'right'!
Last edited by AndrewZorn; 11-13-2008 at 10:09 PM.
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I like the idea. Can't say how useful it would be in the end, but my DDC's get hot as hell and with some thermal paste/tape between the pump and the heatsink, some of the heat must get removed.
Test bench has a D12SH-12 dedicated to cooling my DDC, the little guy is quite dedicated to his purpose in life.
No, I don't know all that much about motors, but as I understand it...it's the breaking of the motor from spinning too fast that causes more power consumption and heat.
Pumps always seem to produce more and more heat the lower the restriction and the higher the flow rate:
Dotted lines below are power consumption vs. flow rate, higher flow rate = higher power consumption
It goes against common sense in thinking in terms of resistance against the motor, but apparently electric motors and power consumption is more affected by the braking effect of spinning faster.
I don't really understand it myself, but Scott is correct, they have all measured that way for every pump I've tested and measured power consumption on. There is other energy at hand like the water horsepower and heat generated by pressure drop within the system, but when talking purely power consumption by the pump...it is always higher with lower restriction. This little effect even showed up in the last waterblock shootout, the really low restriction blocks had about .1C higher water temperatures than the high restriction blocks. Not much to measure there, but consistent in this effect.
Electric motors are weird that way...
Anyhow, back on topic. I don't know that the heat is really an issue for the pumps or not, but I've never really liked how hot the DDCs get in comparison to the D5s. Those heatsinks look nice!
Last edited by Martinm210; 11-13-2008 at 11:56 PM.
Cheers for the graph and for the explanation. I actually sort of get it now
would it be safe a simple summation:
it would heat up faster cause it pumps faster/rotates faster without restriction
but with restriction the pump won't be able to pump faster/thus not producing more heat than necessary
OP & Naekuh, with this DDC sink, i think you take out the bottom compartment of a ddc pump and attached with thermal pad/tape on the circuit board proper? so better heat transfer without the plastic in between right?
I believe most of the heat comes from the electronics driving the motor which does not get cooled by the water+1
So I guess mine must be a special pump - low restriction, high flow rate ( >2gpm), no direct airflow, and it still stays pretty cool
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Nice idea but I don't really need it. I created a DDC mount which install in a 3.5" bay and the pump elevated by rubber mounts and holes to install a 80mm fan if needed. This is placed in a area where a 120mm fan is blowing across so it stay cool.
My ddc3.2 is positioned behind my 120.2 radiator,so gets some airflow across it from that.
A full bottom piece would be interesting though.
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No it's not fixed. The newer DDC 18w ones have bare sort of bottoms and the older ones have plastic casings on them when they're taken out. So yeah some electrical insulation in the case would be good.
I think this is a great idea though, sure plastic doesn't transfer heat good but it gets hot anyway. Putting that heatsink + thermal tape on will help keep that side cool.
What is not consumed as energy is given off as heat. In the same respect if your home heat pump takes a 1/3hp motor for the condenser fan and you install a 1/2hp motor the unused (potential) energy is given off as heat into the motor. A properly sized motor to fan blade size/pitch setup will give off less heat.No, I don't know all that much about motors, but as I understand it...it's the breaking of the motor from spinning too fast that causes more power consumption and heat.
Pumps always seem to produce more and more heat the lower the restriction and the higher the flow rate:
Dotted lines below are power consumption vs. flow rate, higher flow rate = higher power consumption
It goes against common sense in thinking in terms of resistance against the motor, but apparently electric motors and power consumption is more affected by the braking effect of spinning faster.
I don't really understand it myself, but Scott is correct, they have all measured that way for every pump I've tested and measured power consumption on. There is other energy at hand like the water horsepower and heat generated by pressure drop within the system, but when talking purely power consumption by the pump...it is always higher with lower restriction. This little effect even showed up in the last waterblock shootout, the really low restriction blocks had about .1C higher water temperatures than the high restriction blocks. Not much to measure there, but consistent in this effect.
Electric motors are weird that way...
Anyhow, back on topic. I don't know that the heat is really an issue for the pumps or not, but I've never really liked how hot the DDCs get in comparison to the D5s. Those heatsinks look nice!
But a modded top with a greater inlet feed to the suction volute will increase the load (amps) drawn by the motor. This is why Laing decreased the inlet size of the newer DDC pumps. Marci said all along to leave the aftermarket tops alone and do not increase the inlet opening size.
Last edited by SiGfever; 11-14-2008 at 02:35 PM.
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nobody liked my goatse mod to the heatsink?
"Thing is, I no longer consider you a member but, rather a parasite...one that should be expunged."
I think most everyone (except for me and you) thought that you meant a prison with the bars and the hands... but that's really our problem, not theirs.
Got my sinks,
uhh... too blingy... but it does what i need them to do.
Last edited by NaeKuh; 11-17-2008 at 04:53 PM.
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Its my fault.. and no im not sorry about it either.[12:37] skinnee: quit helping me procrastinate block reviews, you asshat. :p
[12:38] Naekuh: i love watching u get the firing squad on XS
I have a bunch of colored LED fans to attach to mineAll in a salute to Blingville, USA
***DB is on cold medicine . . .ignore him
"Thing is, I no longer consider you a member but, rather a parasite...one that should be expunged."
What is this bling you speak of? ROFL
"Theirs goes, 'Bling bling bling blingy bling-bling.' Ours goes, 'Bling bling bling bling blingy bling-bling.'"
-- Vanilla Ice, 1990aol music vanilla ice
"Thing is, I no longer consider you a member but, rather a parasite...one that should be expunged."
My rig is the anti bling:
http://img299.imageshack.us/my.php?image=1000725oz5.jpg
http://img168.imageshack.us/my.php?image=0000006wb7.jpg
Though i'm moving up a little on my next build:
http://img523.imageshack.us/my.php?image=0000006oh7.jpg
http://img136.imageshack.us/my.php?image=0000006ww3.jpg
http://img136.imageshack.us/my.php?image=0000006ww3.jpg
I would like to see a replacement bottom for them as well could be pretty interesting to see what some people will come up with...
Go compression fittings bud . . .worm drives are fugly . . .
"Thing is, I no longer consider you a member but, rather a parasite...one that should be expunged."
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