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Peltier/TEC Hybrid Water Cooling - Page 19

post #181 of 267
Thread Starter 
Today December 30th 2015, my chilled water cooling setup is 3 years operational! smile.gif
post #182 of 267
Hey, just found this thread as im looking into peltiers myself. I was thinking... my oil cooled pc, would it not be possible to super chill the oil the pc is in with a peltier setup, obtaining below ambient temps and no risk of condensation?

It may have already been discussed and missed by me, but was just an idea.

Well done on the 3 years by the way, great looking setup.
post #183 of 267
You can't "super" cool the oil as it becomes too viscous.
post #184 of 267
Thread Starter 
false
Quote:
Originally Posted by jevans3d View Post

Hey, just found this thread as im looking into peltiers myself. I was thinking... my oil cooled pc, would it not be possible to super chill the oil the pc is in with a peltier setup, obtaining below ambient temps and no risk of condensation?

It may have already been discussed and missed by me, but was just an idea.

Well done on the 3 years by the way, great looking setup.

You could do it but as Thick8 said the viscosity would thicken with lower temperatures which would cause the circulating pump to work harder and seriously shorten the life of your pump.

PC water cooling pumps are not designed to pump thicker liquids, that doesn't mean you couldn't find a pump designed to pump oil, but finding one that can run continuously may be a problem.
post #185 of 267
Thread Starter 
Edit, I found a great temperature controller online to add to my setup controlling the 3rd TEC assembly, I was going to build one from scratch myself but finding one already made has made adding it much simpler.

It runs off 12v DC or AC and has a 30a relay and works great, it allows keeping my coolant temperature in a constant range always, so far it has been worth every penny! smile.gif

http://www.thermomart.com/digital-automatic-temperature-control-instruments?product_id=251

The company is safe to order from and I got mine 1 day before it was scheduled to be delivered.
post #186 of 267
Thanks for your reply. Yeah I have had to use a special marine pimp as it is! Haha, But I was actually thinking putting a large heats ink on both sides of the peltier and put the cold side in the oil, using my fans in the oil and convection currents to circulate. Getting rid of the pump all together.

Or another thought... just mount the peltier right on the cpu and let the oil cool the hot side and keep my pump and radiator.
Edited by jevans3d - 2/1/16 at 2:25am
post #187 of 267
For thick oil pumping, you are no longer looking at glorified aquarium pumps, you are no longer in hobbyist territory.
Grundfos -known for their solid HVAC circulation pumps- will have something for you in their industrial range
check https://www.grundfos.com/products/find-product.html

But you are no longer looking at pumps in the USD 50 to 100 range smile.gif


The alternative would be to look for a liquid that doesn't thicken as the temp decreases ... and there are lots of them, most not very good for your health;
but, those liquids must also still have *some* properties -like having a relative high specific heat capacity... so you ratehr quickly end up with Fluorinert.


There is just no damn free lunch , is there? smile.gif
post #188 of 267
Quote:
Originally Posted by RnRollie View Post

For thick oil pumping, you are no longer looking at glorified aquarium pumps, you are no longer in hobbyist territory.
Grundfos -known for their solid HVAC circulation pumps- will have something for you in their industrial range
check https://www.grundfos.com/products/find-product.html

But you are no longer looking at pumps in the USD 50 to 100 range smile.gif


The alternative would be to look for a liquid that doesn't thicken as the temp decreases ... and there are lots of them, most not very good for your health;
but, those liquids must also still have *some* properties -like having a relative high specific heat capacity... so you ratehr quickly end up with Fluorinert.


There is just no damn free lunch , is there? smile.gif

I'm talking about removing the pump all together. But I currently have a £200 pound marine oil transfer pump so the oil viscosity really wouldn't be an issue anyway, but the flow rate would drop massively so thought my above idea without the pump would work?

I just cant stand the idea of spending so much on water cooling and still being at ambient! lol
post #189 of 267
Quote:
Originally Posted by jevans3d View Post

Quote:
Originally Posted by RnRollie View Post

For thick oil pumping, you are no longer looking at glorified aquarium pumps, you are no longer in hobbyist territory.
Grundfos -known for their solid HVAC circulation pumps- will have something for you in their industrial range
check https://www.grundfos.com/products/find-product.html

But you are no longer looking at pumps in the USD 50 to 100 range smile.gif


The alternative would be to look for a liquid that doesn't thicken as the temp decreases ... and there are lots of them, most not very good for your health;
but, those liquids must also still have *some* properties -like having a relative high specific heat capacity... so you ratehr quickly end up with Fluorinert.


There is just no damn free lunch , is there? smile.gif

I'm talking about removing the pump all together. But I currently have a £200 pound marine oil transfer pump so the oil viscosity really wouldn't be an issue anyway, but the flow rate would drop massively so thought my above idea without the pump would work?

I just cant stand the idea of spending so much on water cooling and still being at ambient! lol


if you are talking about this:
Quote:
Originally Posted by jevans3d View Post

Thanks for your reply. Yeah I have had to use a special marine pimp as it is! Haha, But I was actually thinking putting a large heats ink on both sides of the peltier and put the cold side in the oil, using my fans in the oil and convection currents to circulate. Getting rid of the pump all together.

Or another thought... just mount the peltier right on the cpu and let the oil cool the hot side and keep my pump and radiator.

then you're gonna need some mighty heat sinks , also, that relies on creating a natural convection fluid movement in your tank.. liquid moving from the "hot" cpu to the "cold" TEC-heatsink by itself. While this works, it can turn out to be a slow and inefficient process.. the delta between hot & cold must be big enough to initiate the convection flow.. but that would not be the problem by itself. It would be that the convection flow might be "too slow" to avoid locally overheating the CPU.

But apparently, you've worked that out by yourself already... so I would suggest something.. like a hi-torque blower (a SanAce?/Delta) or ... a submersible pump ... that "stirs" the liquid around, preferably forcing it through the "cold" HS and then "flowing" past the the "hot" cpu.

So yeah, the idea will work.. you just need to make sure you're not fighting the (convective) flow and that you've got something with enough "ooomph" to push the oil around.

Note i said a blower, not a fan. A blower might be better suited to stir liquids around compared to a fan
post #190 of 267
Yeah I did think convection currents would be too slow alone. Seems like it could work in theory but a lot of work in practice. I think I might go down Ryans route of cooling the water and invest in a water cooled rig to experiment with. Thanks for the advice guys.
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