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Xtreme Cooling LN2, Dry Ice, Peltiers, etc... All the usual suspects |
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04-15-2003, 08:49 AM | #1 |
Cooling Savant
Join Date: Feb 2002
Location: Oxford University, UK
Posts: 452
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Questions about TEC ratings
Ok, lets take your common 226W TEC.
Does this rating imply that the TEC will be able to transfer 226W of heat, at a greater cost in poewr requirement, or that the TEC will draw 226W of power from the supply and transfer something less than 226W. I understand that the temperature difference also factors in here, though I'm not exactly sure how. I think that the maximum heat will be transferred for zero degrees temp difference between hot and cold. I just like to try and get these things straight in my head and any help would be much appreciated. 8-ball |
04-15-2003, 07:00 PM | #2 |
Cooling Savant
Join Date: Sep 2002
Location: Cincinnati, OH
Posts: 229
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Hey 8-Ball,
Here is a quote from an article I receltly wrote that might help explain things. The maximum rated capacity of this TEC is 226 watts, which is referred to as the TEC’s Q-max and defines the maximum amount of heat the TEC can pump from one side to the other when the two sides are at the same temperature (0º differential temperature). In operation, the two opposing sides of a TEC will not be at the same temperature. As the differential temperature goes up, the TECs heat pumping ability will go down. A TEC should be sized so that its Qmax is approximately 2 or 3 times the expected heat output of the processor it is intended to cool. Based on this rule of thumb, the 226 watt TEC used in the MCW462-UHT should be able to cool a processor putting out between 75 watts and 113 watts of heat energy. But... there is more to this story than just Q-max. There is a lot more TEC theory in the article if you are interested... Swiftech MCW462-UHT Thermoelectric Cooler review @ Systemcooling.com I hope that helps. |
04-15-2003, 07:10 PM | #3 |
Cooling Savant
Join Date: Sep 2002
Location: Saskatoon, Saskatchewan
Posts: 294
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That's basically right. 226W TEC means best theoretical heat transfer is 226W from cold to hot side.
it will draw close to 400W of power to run at that speed.
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Can anyone else here say that they have a watercooled monster that's 45" tall? |
04-15-2003, 07:40 PM | #4 |
Cooling Savant
Join Date: Aug 2001
Location: Chippewa Falls, Wisconsin
Posts: 294
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Speed? You mean 'displace that amount of thermal energy'
I'm feeling nitpicky. Sue me. |
04-15-2003, 08:34 PM | #5 |
Pro/Guru - Uber Mod
Join Date: Sep 2002
Location: Indiana
Posts: 834
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Very nice article RoboTech.
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04-17-2003, 08:04 AM | #6 | |
Cooling Savant
Join Date: Feb 2002
Location: Oxford University, UK
Posts: 452
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Quote:
That cleared a lot of things up. Hope you don't mind if I refer other people to that article if I come across people considering TECs. Lots of useful information. Thanks again, 8-ball |
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