cfm and heater cores

[tapo210]

anything wrong with using 60cfm fans in a push/pull config with a heater core. i would be running a 226w and 172w pelt at full voltage. was looking at the SilenX which pushes 58cfm at 14dBA, that's just plain sick, and expensive.

[Joe Camel]

(relax billA, i can take this one)

there is no way 2x 60CFM fans on 1 heater core could cool all that. i dont think 1 HC with ANY fan (blower) could. have you worked with pelts b4? they put out A LOT of heat, A LOT! if your going to (try) to use pelts, you better get "quiet" out of your mind.

personal experience: i had one 220w TEC with a slit-edge WB, BIX 2 with 4x120mm (120+CFM), Mag3. and without using cold (-10F) outside air, the water temps got into the 90F + range.
also: running both of thoes pelts will cost you about $30-60 a month (depending on how long there on) id suggest reading up on pelts (TECs) b4 you jump in.

GOOD LUCK

[tapo210]

i've done quite a bit of reading on the subject. there just isn't any wealth of up to date information on the different temperatures at the different stages of the loop, therefore i have no idea what temperatures to expect the water entering the heater core to be at. plus there are many variables and setups that can deterime temps and the few things i have read, didn't even begin to scratch the surface about what i would like to know about it. that's why i turned to the forums. i read in some place that 70cfm was the minimum needed on cores and radiators, the author never mentioned the type of setup so i could only take it with a grain of salt.

i may not be the definitive source on pelts, but i will have to disagree with your statement on a core and any fans being unable to cool that system. you have to take into account ambient air, loop setup and the type of core being used.

although i appreciate input, your assuming i have no idea what is involved with implementing T.E.C. i have read just about every article reputable sites such as procooling.com has on the subject along with countless posts, and taking the time to look at galleries along with reading what components they have, the type of loops they have and the result they get from it. people who post about subject matters that are covered in depth all over forums and articles, such as picking the right power supply, are the ones that need to do their homework.

[|kbn|]

Fans are like pumps, whats the point in using a pump that while it can do 30l/m at 0 head can only do 1l/m at 0.5 head. Does the fan give any static pressure ratings?

I suggest you have a read of this which has lots of stuff about fans. hover your mouse over "operating point".

So assuming that the fan you intend to use can push the hole 60cfm at the static pressure (flow resistance) of your heatercore, work out the temperature difference between the cold air and the hot air.
Also push-pull config is compleatly POINTLESS!!!!! the best way to have two fans is both sucking one infront of the other on the SAME SIDE so that the static pressure is higher and pulls more air through.

I would suggest a fan like this becuas eit is the perfect size for a heatercore. Its 24v and at 8v is silent and goes at 12 is nicely quiet pushing lots of air! at 24v it gets niosy and will blow things accross my room. I think for your setup you will need it about 15-24v. Finding a fan like this can be difficult unless you can afford £50 for a fan. This cost me £15.

If you want silence I suggest moving your heaterecores (get a bigger one, or two) outside. make some kind of enclosure for them. Get a few high cfm fans which are capable of running in wet environments (costs a bit more) and keeting the rest of your stuf with your computer. I dont know if you would need a biugger pump but I would suggest make it least restrictive possible maybe using the heatercores in parrelell. This should definatly give you some nice temps and also take advantage of the winters cold weather.

[Butcher]

I use one of these: http://www.comairrotron.com/dc_family.asp?FamilyID=38 at 10-12V (it's a 235cfm, 24V model). With only a 220W TEC I needed it at around 15V to keep the water below 30C, with a 20C ambient. 60cfm fans aren't going to be blowing anything like enough air for the sort of heat you're talking. Bigger fans handle static back pressure better in general.

[Joe Camel]

deep breathes...(stop laughing bill)

my friend, i was not ass-u-ming anything. (reference dual pump thread)
obviously you have some knowledge of this subject since you knew the wattage of the pelts you were (are) going to use.

i am NOT the definitive source on pelts. in fact, i went thru what you are going thru about 3 months ago. i was just sharing my experience with the subject. here are a few threads of me stumbling thru the learning process:

http://www.ocforums.com/showthread.p...hreadid=259765

and,

http://www.ocforums.com/showthread.p...hreadid=257143

OC.com has some good stuff (IMO). although it is not PROcooling, there are still good and helpful people there with much info to be shared...

i hope these threads and another source for info helps you.

GOOD LUCK

PS i understand the "lack" of updated info on pelts, i did about a week of reading (learning) b4 i made this jump. i dumped this whole thing after i saw my elec. bill for the first 2 months. o-well live and learn (FS/FT everything i listed in DIY thread)