I looks like some one who knows nothing about water cooling and TEC's designed this .. though it's very interesting. the 5 pumps in series is an example of a poor design
My single TEC block with a CPU idling is cooler than -21c
I looks like some one who knows nothing about water cooling and TEC's designed this .. though it's very interesting. the 5 pumps in series is an example of a poor design
My single TEC block with a CPU idling is cooler than -21c
That's exactly what I was thinking when I saw this....I thought you got cooler temps with hundreds of dollars less hardware. Crikey that thing is huge....wouldn't want it next to my PC.
I bet he wont be impressed with his loaded temps either....
Hmmm...NO, I don't think they are....there are to many people using them incorrectly.
direct die is probably dying as the TEC sizes are not keeping up with the CPU's but a decent chiller correctly built still has a good run - there just aren't many around.
Well, i've seen MANY wc and air cooling + etc projects but that THING has some attitude, even that much it surpasses the definition of pure awesomeness!
That thing is beyound awesome! I like it
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ok there is something ver wrong. 1: you DO NOT need all those pumps (though it looks cool i would take at least half out as it just interferes) 2: -21c ?!?!? WTF my swiftech block runs at -22c without a cpu so something aint right. 3: the overal desighn (though it looks good) has to many flaws, personally i would re desighn with more radiators and less pumps thinner copper etc.
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The thick copper is fine but I would've chosen to use say 2 or maybe at most 3 iwaki RD-20/30 pumps those definitely pack a punch. The other issue is the number of TECs isn't the issue it's the power of each TEC. Those are probably 90w TEC's so it's not even that much but it is extremely inefficient.
Tecs are great and have their place, but people just like piling them on without realizing how inefficient they are.
A small refrigeration system with a low RPM fan and a 1/4 HP compressor would use less power and move much
more heat.
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Tecs are great and have their place, but people just like piling them on without realizing how inefficient they are.
A small refrigeration system with a low RPM fan and a 1/4 HP compressor would use less power and move much
more heat.
From my "Everything you've wanted to know about TEC's" thread
Q. I’ve heard that TEC’s are very inefficient is this true. And what about phase change ?
A.
To begin with the Term “Efficient” is NOT the correct term to use when comparing the amount of electricity used to what It’s able to move. As this can exceed 100% by a long way. When talking about moving heat we use the term C.O.P (Coefficient of Performance)
The C.O.P number is ascertained by taking the Qc (Which may NOT be QMax) and dividing it by the input power. Higher the number equals higher the “Efficiency”
Now there is NO blanket rule to whether or not a TEC is “Efficient” (high COP). This is the case because the COP of a TEC changes depending on the input power relative to it’s max. As you increase the input power the COP is reduced (Less efficient).
If we compare the COP of common phase change systems to a TEC system including pumps and fans. The COP can be very similar PROVIDING you have a relatively low input power relative to the max of the TEC. However to achieve a TEC system with such high COP you’ll need to use many under voted TEC’s. Making the unit far to large to direct die cool your PC. You’ll have to make a water chillier for that kind of COP. A Single TEC direct die cooling a PC will require a high input power relative to it’s max giving it a comparably MUCH lower COP than phase change.
For a 360Qmax TEC running at 100% of Umax it would have a COP of about 0.6 (360Q/600)
For a 360Qmax TEC running at 50% of Umax it would have a COP of about 2.3 (269Q/114)
NOTE: As you decrease the input power relative to the Max of the TEC, the maximum achievable delta is also decreased. So if you have a phase change and TEC system running at the SAME COP the phase change system will always result in lower temps because the phase change unit will have a far greater delta.
Hmm, I'd like to see the data from those numbers. I'd be extremely surprised to see a TEC system reach a COP of 2.3 - TECs would be used in mainstream capacity types of applications if you were able to get a COP that high.
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Hmm, I'd like to see the data from those numbers. I'd be extremely surprised to see a TEC system reach a COP of 2.3 - TECs would be used in mainstream capacity types of applications if you were able to get a COP that high.
To say TEC's aren't used in a mainstream capacity is absolutely wrong - TEC's were designed to cool individual small electrical components (i.e. NOT CPU's.) that's why there a hundreds of TEC's under 50w in all sizes and shapes in most mainstream manufacturer catalogues - it is a big industry and they are well used.
TEC's are used in mainstream commercial applications they are generally multiple TEC units and are used for both air and liquid cooling. That said they are generally designed for power as opposed to efficiency and don't necessarily have a high COP.
A COP of 2.3 isn't the end of it.....that's just the starters for 50% power if you can hit the right Dt, COP keeps going up.
Don't take my word for it here is a COP performance chart for a Qcmax 289 unit.( a fair bit smaller than Ultra's 360 unit.) http://www.ferrotec.co.uk/index.php?...rhs_graph.php?
Of course if your using a single TEC - for direct die cooling for instance - the idea of high COP goes out the window because there is no Q (cooling power.) but that is where one picks up by using multiple TEC's (single TEC's NOT stacked.) which of course only works in a chiller set up i.e you use a large number of TEC's suitably undervolted the sweet spot is generally somewhere between 20-30% Imax.
That said (as Ultra also pointed out.) you are still generally better off with phase change if you can afford it for the same COP phase generally has a better cooling point. (lower temps.)
EDIT - Can't remember exactly but Neakuh's TEC cooler was better then COP 2.3 I think he got to 3.X
MONSTER TEC project, named "KOMBAT"
But he was interested in TEC's. As for myself, I'm building chiller from aircon atm ![[XC] gomeler's Avatar](image.php?u=17665&dateline=1215408777)
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