Dehumidifier/waterchiller questions.

OC-XEONs · 04-10-2004, 09:35 AM

Hey all,

I have been looking into some more extreme cooling for my dual Xeon rig... reading through these forums I see a lot of mention of using a dehumidifier as a waterchiller... my question is how much heat can your avearge sears/walmart bought dehumidifier cope with?

Currently the Xeon's are running @ 3.82 Ghz overvolted to 1.65v, they are being cooled by a Swiftech Quietpower rig now... but I want to break the 4 Ghz mark.... I figure each chip is using around 140-145 watts... The one catch is these chips must run 24/7 under 100% load of Folding @ home.

Any input on using a dehumidifier for this task would be very helpful.

Thanks!

bigben2k · 04-11-2004, 12:17 PM

In short, take the power draw of the unit, substract the fan, and multiply it by 3: that'll give you a very rough estimate of the cooling capacity.

redleader · 04-11-2004, 08:36 PM

I'd guess, a 1 HP compressor will get you roughly 10000 BTUs of cooling power across a maybe 20C difference. Very rough estimate, but thats what my AC unit does.

Groth · 04-11-2004, 08:56 PM

Another way to figure dehumidifier capacity is to look at it's 'pints/day' rating. To condense water the dehumidifier has to absorb the water's 'latent heat of vaporization' (2257 Joule/gram).

1 pint/day = 0.00525 grams/second; multiply by 2257 J/g = 11.85 W

That 11.85 W is at dewpoint temperature, which is generally 5 to 10 C below ambient. If you want to cool colder than that, buy more capacity (say, 1.5 to 2 times your expected heat load).

04-10-2004, 09:35 AM	#1
OC-XEONs Cooling Neophyte Join Date: Apr 2004 Location: FL Posts: 1	Dehumidifier/waterchiller questions. Hey all, I have been looking into some more extreme cooling for my dual Xeon rig... reading through these forums I see a lot of mention of using a dehumidifier as a waterchiller... my question is how much heat can your avearge sears/walmart bought dehumidifier cope with? Currently the Xeon's are running @ 3.82 Ghz overvolted to 1.65v, they are being cooled by a Swiftech Quietpower rig now... but I want to break the 4 Ghz mark.... I figure each chip is using around 140-145 watts... The one catch is these chips must run 24/7 under 100% load of Folding @ home. Any input on using a dehumidifier for this task would be very helpful. Thanks!

04-11-2004, 12:17 PM	#2
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	In short, take the power draw of the unit, substract the fan, and multiply it by 3: that'll give you a very rough estimate of the cooling capacity. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

04-11-2004, 08:36 PM	#3
redleader Thermophile Join Date: Jun 2001 Location: The deserts of Tucson, Az Posts: 1,264	I'd guess, a 1 HP compressor will get you roughly 10000 BTUs of cooling power across a maybe 20C difference. Very rough estimate, but thats what my AC unit does.

04-11-2004, 08:56 PM	#4
Groth Cooling Savant Join Date: Mar 2003 Location: MO Posts: 781	Another way to figure dehumidifier capacity is to look at it's 'pints/day' rating. To condense water the dehumidifier has to absorb the water's 'latent heat of vaporization' (2257 Joule/gram). 1 pint/day = 0.00525 grams/second; multiply by 2257 J/g = 11.85 W That 11.85 W is at dewpoint temperature, which is generally 5 to 10 C below ambient. If you want to cool colder than that, buy more capacity (say, 1.5 to 2 times your expected heat load).

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