Anyone know if this duct cooling works?

[JoeFoster]

Would this thing lower temps well? Anyone using something like this? I plan to put it on an slk-900(A)


Overclocker's Cooler Kit

 

[lenjack]

i've seen similar stuff, some home made. They work.

 

[fredtam]

It works on dryers.

Edit:

I almost forgot the fan on SLK-900 should be blowing down on the heatsink so you want to make sure the fan on the other end is an intake so it is not fighting the heatsink fan. This may also cause a problem if you have that intake right next to an exhaust where you would be drawing the expelled air back into the case or causing turbulence not letting the intake draw in as much air as it should.

 

[Zepper]

Looks like a valid idea to me. But you wouldn't need to use two fans, one on either end of the duct. Just use the one case mounted fan, and fasten the duct right to the top of the heatsink with one of the adapters.
. You could use both fans but it seems like a waste to me and more noise to boot.
.bh.
:moon:

 

[fredtam]

Originally posted by: Zepper
Looks like a valid idea to me. But you wouldn't need to use two fans, one on either end of the duct. Just use the one case mounted fan, and fasten the duct right to the top of the heatsink with one of the adapters.
. You could use both fans but it seems like a waste to me and more noise to boot.
.bh.
:moon:

Depends on the CFM of the fan and the distance of the ducting. Will he be using panaflo?
It is much easier to pull air from the surroundings than to pull a column through a three inch tube. Try breathing through a straw.
Also that heatsink requires that the fan be blowing down on the heatsink itself. If the intake is located the case this will allow for heat build up in the air directly above the heatsink in the duct. That would be poor thermal design.

 

[0roo0roo]

two fans working in series will more likely reach the rated cfm of one fan. one fan with duct might not be optimal for the work cuz of efficiency loss.

 

[pelikan]

Cool air from outside the case makes a huge difference. My duct is a straight 4.5" pvc pipe that goes out my side panel. It dropped my temps by 8C under load. My cpu fan pulls in the air without an extra fan on the other end of the duct. I also have negative case pressure which pulls in more air through the big duct and helps considerably to reduce temps.
The smaller, bent tube you linked to would also work, just not quite as well. I've seen plenty of people use things like that. If you hook it up to the back of your case under your psu, you may want to deflect your psu exhaust upwards so that you don't pull in hot air through the duct.

 

[0roo0roo]

neg case pressure only is good if you have no filters though

http://www.dansdata.com/hx45fan.htm

read the bit on the side, fans 101.

 

[keyeye]

Fans 101 seems reasonable, but I sure wish there was good data available to us lay people without each one of us doing our own experiment. The parrallel vs series is discussed all the time, for example. Given the number of heatsink reviews, I would think there would be a comprehensive look at these issues. Anyone know of one?

As far as the duct, my very limited knowledge is that resistance to airflow is related to the radius of the pipe to the 4th power (i'm sure this is not the entire formula). So a straw (even a short one) may be completely inadequate compared with your windpipe. I suspect, but do not know, that the impact of a duct on fan performance may be mild in low flow states (whatever that may be).

I'm curious. May have to try it.

 

[Amorphus]

there is a lot of stuff in the overclockers/enthusiast world that is not fully looked into because we are not doing this full time, and the few who are aren't into this sort of stuff, apparently. meh.

one can only hope...

but for now, there are a lot of secondhand sources you can get pertinent information from.

 

[Finnkc]

I am a alittle tight on room in my box however I don't see the problem using a cold air intake like that ... hell race cars use them ... not for the same reasons however but ...

 

[pelikan]

Like I said in my other post, cool air from outside the case works very well. A good duct, together with a top of the line heatsink and correct case fan arrangement, will give you temps as good as entry level water cooling.