Post Rad Chiller Concept

[Cupcake]

Oh boy, im impressed so far

I see loads of threads with cool ideas but this is one of the first where people follow through

I am eagerly awaiting more pictures and some results

[Martinm210]

Whew, channel cutting under way now...

My commercial slotting saw arbor just wasn't going to work, so I had to machine a new one out for 7/8 brass bar I had handy. I should have done this a LONG time ago, sooo much more solid now and runout on the sawblade is almost non-existent.

I'm also my own worst enemy..

I just wasn't happy with the layout on the 1/8" channels, I ended up going with a 1/16" slotting saw and tighter spacing so you more or less end up with 1/32" thickness fins and 1/16" channels. This should do much better thermally and flow good as well. Unfortunately this little change will make channel cutting take about 3x as long

It also took some creative clamping and layout, but I figured out a way to make a full channel cut in one past. Milling head is swung forward and the workpiece actually passes in front of the milling column...Whatever works, this is a big workpiece!!

Might be next weekend before the channel cuts are all done...

[littleowl]

Whew, channel cutting under way now...

My commercial slotting saw arbor just wasn't going to work, so I had to machine a new one out for 7/8 brass bar I had handy. I should have done this a LONG time ago, sooo much more solid now and runout on the sawblade is almost non-existent.

I'm also my own worst enemy..

I just wasn't happy with the layout on the 1/8" channels, I ended up going with a 1/16" slotting saw and tighter spacing so you more or less end up with 1/32" thickness fins and 1/16" channels. This should do much better thermally and flow good as well. Unfortunately this little change will make channel cutting take about 3x as long

It also took some creative clamping and layout, but I figured out a way to make a full channel cut in one past. Milling head is swung forward and the workpiece actually passes in front of the milling column...Whatever works, this is a big workpiece!!

Might be next weekend before the channel cuts are all done...

yes martin I agree that would work much better thermaly speaking! I am sorry you have more work that way but it is looking great!!!!!

[NaeKuh]

looking very good martin

[Martinm210]

looking very good martin

Cool, I was hoping the little channel thickness change would be alright. It should only be a good thing for pulling heat away.

Here are a couple more, finally got one block cut.


And here is a 40mm TEC for scale, it'll be a bit oversized for 40's, but ready to take on the bigger ones if you decide to later.



Turning out pretty good I think. Ran out of coolant so I'm going to take a break and give the mill motor a rest. I'll do the same for the other block later..

[n00b 0f l337]

Very very nice job. Congrats

[littleowl]

wow martin that is looking great!!! Keep up the great work!!!!!!

[Pete]

Just gets better and better. Mart i'm gonna PM you as love to know the price for such item

[Martinm210]

Thanks!

It's turning out well even if it is taking longer than expected. Probably finish the second base and start working on the tops next weekend or this week if I can squeeze in a little evening time in after work.

[NaeKuh]

Thanks!

It's turning out well even if it is taking longer than expected. Probably finish the second base and start working on the tops next weekend or this week if I can squeeze in a little evening time in after work.

martin... remember im in no rush. My project is date is May on Freya. The name of my new machine... also the name of the girl on my avatar

And yeah. its from Chobit, and freya is suposidely a super computer. :P

[littleowl]

well that is a hot looking super computer LOL

[Martinm210]

martin... remember im in no rush. My project is date is May on Freya. The name of my new machine... also the name of the girl on my avatar

And yeah. its from Chobit, and freya is suposidely a super computer. :P

Sounds good, I got half of the other block channels cut today, will carry on at my normal slow pace...

Someday, I'm going to try and build a new system like all you pro case builders do. I'll have to look for some inspiration like that too, that's awesome!

[systemviper]

Sounds good, I got half of the other block channels cut today, will carry on at my normal slow pace...

Someday, I'm going to try and build a new system like all you pro case builders do. I'll have to look for some inspiration like that too, that's awesome!

Isn't that always the case, building great stuff for others and you system is growing spider webs on it

Keep up the great work, there is always new idea's that expand our playground and you seem to be the engine that is driving a lot of the leading edge information and integration.
Martin you are becomming a true innovator of the Extreme scene

Bravo

[systemviper]

Yeah, the block will be big enough to take on 3 x 62mm TECs, so it'll be flexible for later changes if needed

Well here you go, some Extreme Chillin....

543W 12v 62mm 30.5A Thermoelectric Cooler TEC Peltier
Krazy to think about having THREE of these on this "Post Rad Chiller"........ Now that i want to see.

543W - 12v - 62mm - 30.5A
Imagine the lights dim as you fire up your system :-)_~


Brand new 62mm TEC, superb quality, most powerful

Details:
This is brand spanking new and is potted (sealed with RTV silicone). I've detailed the specs. below to enable you to make your own independent and informed judgement;
At 50°C it consumes 30.5 amps @ 17.8v giving a consumption of 542.9W (0.543Kw).
At 25°C it consumes 30.5 amps @ 15.6v = 475.8w (0.476kw). It's pumping power or Qcmax is impressive @ 50°C being rated at a very respectable 282w, equally as impressive @ 25°C it's Qcmax is 257w.
This TEC has 127 couples and a resistance of 0.31 ohm @ 50°C and 0.27 ohm @ 25°C. It's ΔT N2 @ 50°C is a very healthy 79°C and 68°C @ 25°C. And Finally it's voltage range is 0 - 15v @ 25°C and 0 - 17.8v @ 25°C, and it's leads are AWG 16 Teflon and approx. 6 inches (15cm) in length.

[NaeKuh]

Well here you go, some Extreme Chillin....
Imagine the lights dim as you fire up your system :-)_~

[Martinm210]

Hey I gotta pay for some new testing gear somehow, and I'm just as excited about this idea as well..

I got the second base channels cut this evening after work, now I can finally move on to milling some (no cutting fluid needed) acetal....ahhh



I also need to pick up some beads to bead blast the machining marks away, this seems to roughen the surface a touch for better heat transfer too.

Slowly but surely...

[serialk11r]

Those fins look sorta short. How tall are they?
It looks really nice though, I wish my waterblocks looked that neat (dremel + 15 used up discs ftw).

[Martinm210]

Those fins look sorta short. How tall are they?
It looks really nice though, I wish my waterblocks looked that neat (dremel + 15 used up discs ftw).

They are .100" or a little less than 1/8". They are about as tall as many CPU block pins. I experimented around with taller pins on one block a while back and I didn't gain anything. In this case I wanted to make the base from 1/4" copper, which was already expensive enough, but I wanted to leave .150" for plenty of strength in compressing the pelts too. There is also that time thing...6 hours just to cut the channels per block..

I think on taller pins you tend to get too much water shying away from scrubbing the base really well. This is already a fairly wide set of channels, so it'll be important to keep the hieght down low to maintain good velocities and turbulence. Sort of like the supreme microchannels, but on a bigger scale.

I think they will be fine, they just looks small when they are on a 7" long x 3 1/2" wide block..

[Fujimitsu]

Beautiful machining Martin, wish i had the time/skill/tools to pull that off.

I am interested to see how this turns out, nice to see someone actually follow through with a TEC build.

[TheJollyFellow]

Martin, I realize it's way out of your budget at the moment...but you really must start saving for a CNC machine! A smallish, well-built one will run about 3G's, but based on the amount of time you're spending on just this one project, you can no doubt make up the difference in time savings alone!

[evil-98]

wow those things are looking great!

[THE JEW (RaVeN)]

Brute torque of the screws, silicone, O-ring, or a gasket to make the seal?

[NaeKuh]

OMG Martin. im seriously in love with your work.

Just watching you do this is and all the testing is well worth the cost.

[littleowl]

OMG Martin. im seriously in love with your work.

Just watching you do this is and all the testing is well worth the cost.

LOL better watch it martin he is getting excited.

[n00b 0f l337]

I think you'll find that if you go with even larger cold plates, and taller fins youll get more performance. Not only that, watt for watt, more peltiers would be better. As you then get a larger heat dissipation surface area. Also watercooling the hots is fabulous and all, but air cooling would be sufficienct if the heat was further spread out.