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Xtreme Cooling LN2, Dry Ice, Peltiers, etc... All the usual suspects |
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12-04-2005, 07:40 AM | #1 |
Cooling Neophyte
Join Date: Feb 2005
Location: USA
Posts: 71
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377/437W Peltier Qmax Rating
While were beating this peltier rating subject to death, the 62mm square 437W Qmax peltier stocked by Frozen CPU also has 2 Qmax ratings.
Th = 50C Qmax = 437.3W I(Qmax) = 32.8A I(dTmax) = 25.2A Umax = 26.7V dT = 74.5K Th = 26.8C Qmax = 376.8W I(Qmax) = 30.4A I(dTmax) = 23.7A Umax = 24.8V dT = 66.0K |
12-04-2005, 01:02 PM | #2 |
Cooling Neophyte
Join Date: Oct 2005
Location: evanston
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Re: 377/437W Peltier Qmax Rating
yes and so do all peltiers, peltiers are more effective and higher temperatures. thus the Qcmax is always lower and 30c then 50c. Personally I do not think that this big of a pelt is needed for effective cool and it would generate so much on the hot side that you would probably get the same proformance from a 270 qcmax pelt.
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12-04-2005, 04:10 PM | #3 | |
Cooling Neophyte
Join Date: Feb 2005
Location: USA
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Re: 377/437W Peltier Qmax Rating
Quote:
One case in point, an AMD X2 4800 running at a conservative overclock of 2.8Ghz with a Vcore of 1.5 would produce a thermal load of ~153 watts. I doubt that a 270W Qmax device would allow one to reach those levels. |
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12-04-2005, 07:32 PM | #4 |
Cooling Neophyte
Join Date: Oct 2005
Location: evanston
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Re: 377/437W Peltier Qmax Rating
That wasnt my point, it is how are you going to cool a massive 430 watt pelt. A 430 watt pelt moves 430 watts in perfect conditions but to be real lets say it moves 350w. So you have to cool 350w it moves plus the around 100w it generates meaning a total of 500w. Lets say you have a cool which has a c/w of .1, then the hot side temp will be 45 degrees above ambient (if ambient is 25c then it is 70c). At 153 watts your pelt will have a Dt of around 45. This means the cold side temp will be around 35c. Lets do the same thing with a 270 qc max pelt. Lets say it moves about 200 watts and generates 50w for a total of 250 and a hot side temp of 50c. This would make for a Dt of 30 meaning a cold side temp of 20c. This shows two things one it is hard to cold a large heat load and the hot side of the peltier. Although still a 270 watt peltier does better because it produces less heat and the hot side is cooled better.
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12-04-2005, 09:17 PM | #5 | |
Cooling Neophyte
Join Date: Feb 2005
Location: USA
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Re: 377/437W Peltier Qmax Rating
Quote:
As for how to cool it, http://forums.procooling.com/vbb/showthread.php?t=11683 Using the same hardware and ambient condition that yielded these results, it is not possible to duplicate the noted Tc with a 270W Qmax device. With Pc = 15.4V x 30A, Tc would be in the range of -4C to 2C. Last edited by DNA; 12-04-2005 at 09:53 PM. |
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12-04-2005, 10:52 PM | #6 | |
Thermophile
Join Date: Sep 2002
Location: Charlotte, NC
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Re: 377/437W Peltier Qmax Rating
Quote:
The whole point is being able to overclock higher, not volt lower.
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