to cool water with peltier

[KS1]

Test1: 1x226W Peltier to cool water
Result: about 2-3C below ambient temp
http://home.wanadoo.nl/krairach/krairach/watercooler1.JPG

Test2: 2x226W Peltiers setup
Result: about 5-6C below ambient temp
http://home.wanadoo.nl/krairach/krairach/peltier_sandwiches1.JPG

O/C result of Test2: 2100+ AIUHB0303
http://home.wanadoo.nl/krairach/krairach/2100+@2187.JPG

Conclusion: It is not as efficient as direct peltier cooling on CPU but it could provide below ambient water temp.

Next step: I will use this cooled water to cool a peltier on CPU.

[IamAnoobieCheez]

That's one of the thoughts I had in mind.

and yes.. nice experiment you have there. Why don't you use water or other types of cooling methods to cool the peltier that is cooling your water.

[IamAnoobieCheez]

But that doesn't seem much of temperature drop using the pelt to cool the water isn't it. Freezer or other types of super-chilling devices maybe better route. if you got money.

Part of the problem you aren't getting real low water temperature drop is because the water passes through that pelt(s) block too quickly. The water flow is too fast, meaning not enough time spent being cooled before it passes through it.

[KS1]

I think there are many reasons for that (when compared to direct pelt cooling on CPU and other high-end freezer):

General observation:

- Temp lost due to too many interfaces (Peltier coldside-Coldplate-Waterblock coldside-water-pump-water-CPU block-CPU Die)
- Water is always moving. It's easier to cool static water (non-moving)
- Low temp limit of a peltier (vis-a-vis -22 or -45C of a phase-change system)
- Amount of water circulating is limited. A large amount of water will help resisting the change in water temp, although it also takes a lot of time to cool a big tank of water down

Case specific:

- I should have insulated the cold part (later when I have time)
- My radiator is too small for the job (Senfu Dualfan). I have to replace the stock fan with a 120x120x38 6W fan. I wish I had BlackIce Extreme II (when I have enough funds)
- This radiator uses very small tube (limited flow)

[KS1]

I change a radiator from Senfu dual fan to Opel Kadette (all copper) car radiator. Repeat: car radiator and not a heater core. It is 2.5 times bigger than BIX II.
I installed 4x120mm 130CFM fans. Now I get water temp about 10C below ambient.
http://home.wanadoo.nl/krairach/krairach/autoradiator3.JPG