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4x TEC water chiller - picking the right power supply

post #1 of 8
Thread Starter 
Ok - so I'm currently testing my 4x TEC heat exchanger with some old 300-450W ATX power supplies (each TEC connected to a single power supply to maximize output). I've got 2 water loops - one with a set of radiators, the other going to the CPU (AMD 1090T 6 core). I want to increase the capacity of my system so under load I get near or slightly below ambient temperatures.

The peltier units I'm using are from custom thermoelectric (12711-5M31-15CQ) and come with a Qmax of 141W:
http://www.customthermoelectric.com/tecs/pdf/12711-5M31-15CQ_spec_sht.pdf

and the heat exchangers are also from custom thermoelectric:
http://www.customthermoelectric.com/Water_blocks/pdf/WBA-4.0-0.92-AL-01.pdf

Without any overclocking, the idle core temperature is around 0C. Under load it creeps up into the high teens or low 20s.

When overclocking to 4.2ghz and a VCore of 5.5, the load temperature of the socket creeps up to about 55C, the cores in the 40s.

So what I'm thinking of doing is buying a 1000W power supply (link)

as well as a new set of peltiers with a Qmax of 225W (link).

I know with these peltiers, my radiators may become saturated - if that happens I'll just buy some larger radiators.

My main question is this: if my peltiers are rated at 15 amps, will the power supply in the link above overwhelm it? Or will the peltier just draw what it needs leaving the remaining current for other devices?

Below is a pic of my test bed - yes I know its a cluster**** but I'm mainly using it to test before I start putting everything back in the case.

http://imgur.com/Io6WA

Thanks in advance!
Edited by voidsstr - 1/9/12 at 6:25pm
post #2 of 8
The 225watt peltiers listed are 199 couple 24v tec fyi., but should run great @ 12v.

if you ran these at 12v your only looking at about 7-8 amps per tec so that power supply should be fine.

Also your pic of test be didn't show up for me.
Edited by Mindchi|l - 1/9/12 at 10:33am
post #3 of 8
Also those 4 199 couple tecs are equivilant to 2 of the 62mm tecs 199 couple tecs I run in my dual tec chiller. I have no problem running them off a 800 watt supply because they only take up about 150w per tec. in your case about 84watts per tec. running them at 12v
post #4 of 8
Thread Starter 
From what I've read, the max power consumption of the peltier is about 40% higher than it's QMax wattage. Why is your peltier only consuming 150W? If I were to estimate, my 141 Qmax pelts are probably drawing about 200W each - I have each of them hooked up to a 300W power supply for testing purposes but I want to get down to a single power supply with larger pelts.
post #5 of 8
you need to run the 141 watt pelts at about 9v for efficiency. if you bring down the voltage, you will actually most likely see a gain in dt.



The 62mm pelts I run draw about 12amps at 12v @ dt=30 moving a load of about 100 watts

So wattage draw is 12ampx12v or 144watts.

This gives a COP of about .69
post #6 of 8
You don't want to use an ATX PSU..... ATX PSU are fixed voltages and have unnecessary voltages.


For TECs, you want variable voltages (i.e. +12v +/- 10%) to adjust TEC performance curve.
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
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Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
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Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
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post #7 of 8
Thread Starter 
Thanks for the responses!

MindChill - do you think the psu here (1000W 24V mean well) is powerfull enough to power the 225W pelts I posted in my first post (link)?

Cheers.
post #8 of 8
Thread Starter 
btw here are pics of my test setup (yes its nasty looking, once I buy a psu for my pelts I'll be able to neatly put everything back in the case): link
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