Future CnC TEC Chiller Block Concept

[NaeKuh]

So im back in the TEC game.

This time i got a few more people to help me and a better Builder. (sorry martin, your awesome, but bei is godly)

So i need some imputs. I asked bentleya to help me render this.


Anyhow to start: (These will be in PAIRS)
I was thinkn of stacking the TEC's in a 2x2 square. This would keep the block not too long. Ideally i want to fit 4 x 62mm tec's.

I was thinkn of making the base plate like this:


Bei told me he could pin matrix the middle. His smallest bit was .125, so i think that would be more then perfect.

The derlin Top would be like this:


the middle needs to have an O Ring so i can slip a bolt though both blocks and Clamp the tec's.

I decided to make a paralell config for the hotside so i can get massive flow though there.

<one problem with top mounted barbs tho is that i would have legs when i used 90's. Side barb option is not something id like to consider as it would cost a lot more for the thicker derlin.>

Any tweeks or thoughts is greatly apreciated.

Oh and if your interested let me know, as i can ask bei to get a group made.

[bentleya]

Gets's my POP Corn For the eye Candy, thats going to happen

[Ultrasonic2]

can you explain this please ?

I was thinkn of stacking the TEC's in a 2x2 square. This would keep the block not too long. Ideally i want to fit 4 x 62mm tec's.


This gives me the impression you want to put 2-4 TEC's ontop of each other ? if so this wont work.

[NaeKuh]

can you explain this please ?

I was thinkn of stacking the TEC's in a 2x2 square. This would keep the block not too long. Ideally i want to fit 4 x 62mm tec's.


This gives me the impression you want to put 2-4 TEC's ontop of each other ? if so this wont work.

not on top, like stacking. Next to each other side by side. With large surface area.
TEC1 TEC2
TEC3 TEC4

Think tic tac toe.

which is why the block is a square. A very Big square. And i need that middle clamp for that reason.

OH YES it will have pairs. So a HOTSIDE and COLDSIDE for h2o.

[zipdogso]

I only problem I can see is you don't want to bolt the TEC's in the corners.

The TEC corners are an inherently weak and also the plate on top of the TEC has very little support, less than 90º and unless you torque the bolts just so the plate will tend to bow and place undue pressure on the corner of the TEC. Even if you use a thick plate if don't torque all the corners evenly one or more will have too much pressure on them.

Bolting centrally along the sides, preferably closer than I have drawn, will support the plate much better 160º or better and it will have less tendency to bow.

[Ultrasonic2]

ok so why dont you just use one 62mm tec ?


oh and nice drawing zipdogso

[evil-98]

love the drawing NaeKuh, sort of hard to understand.
maybe some technical drawings? id like to see this

[NaeKuh]

ok so why dont you just use one 62mm tec ?


oh and nice drawing zipdogso

because id rather use 4 and downvolt. (we cant beat physics, but we can sure try to milk it)

I was thinkn running 2 on serial and then paralell for 4 TEC's total.

Here's a better option - get 4 12730 TECs (the eBay '545W' Ebay 545 HERE ) and wire them as 2 series pairs. They will draw about 10A at 6V, so your Meanwell will easily deliver the total of 20A at 12V.

At that level, each TEC will provide about 80W of cooling at 20C dT, for a total of 320W cooling. Power in is only 240W. This setup is also self-regulating to some extent - at lower heat load (say idle or normal use) the dT will not run up that much, because when below 35% Imax, the higher dT curves don't move much power. You will also have good headroom - the cooling at 10C dT is 120W per TEC, for a total of 480W. So you won't 'hit the wall' if power goes up - you will just get a little less cooling.

Going with jimbo's advice.

also im getting a T-stat made for these guys so they can cycle on and off.


also i was thinking since the bolt would be over the copper and Derlin,
wouldnt I get a more even mounting pressure over the middle?

But yes i was worried about cracking the corners, which is why i made the plate longer then the cooling area under the tec's.

[Ultrasonic2]

sorry i some how managed to misunderstand your block dimensions . your trying to fit 4 of the 62mm TEC's under there .. thats gonna make for one big block .. . this will be interesting to watch

[zipdogso]

also i was thinking since the bolt would be over the copper and Derlin,
wouldnt I get a more even mounting pressure over the middle?

But yes i was worried about cracking the corners, which is why i made the plate longer then the cooling area under the tec's.

To be perfectly honest the middle bolt is not particularly an issue since it is supported all round by the TEC's...it's the outside ones.
I don't really see what having the plate larger than than the cooling area will do as far bolting pressure goes...

Well I said my 2 cents worth...now I will watch your build.

I understand sometimes design requires less than ideal solutions.

[demonkevy666]

To be perfectly honest the middle bolt is not particularly an issue since it is supported all round by the TEC's...it's the outside ones.
I don't really see what having the plate larger than than the cooling area will do as far bolting pressure goes...

Well I said my 2 cents worth...now I will watch your build.

I understand sometimes design requires less than ideal solutions.

a good read for anyone planing to use tecs
http://www.customthermoelectric.com/TECmounting.html

[gillbot]

I did something similar back in the PII/PIII days. As long as your base is thick enough and you aren't crazy with a wrench, there will be no problems with cracking the corners.

[NaeKuh]

all your advices are greatly apreciated!

Im sure it will give bentleya ideas on how to render it.

[bentleya]

Thanks for all the hints , i need to do loads of research as this is my first taste into TEC

[NaeKuh]

Thanks for all the hints , i need to do loads of research as this is my first taste into TEC

its dangerous.

cuz it makes normal water boring.

[evil-98]

its dangerous.

cuz it makes normal water boring.

i agree.. which is bad really bad.. the tinkering never ends

[Ultrasonic2]

here's a pic of my old QUAD TEC block

for interest sake

[bentleya]

Right expect lots and lots of questions tomorrow, as could;nt get it done today due to XS being down from 9 to about 5 even tho it said only 15 mins so tomorrow is the day

[Ultrasonic2]

Right expect lots and lots of questions tomorrow, as could;nt get it done today due to XS being down from 9 to about 5 even tho it said only 15 mins so tomorrow is the day

yeah that got to me too

[Metric]

Naekuh, something like this? Wasn't too sure on the screw locations and your bolt through the middle, but this is what I was able to pull out from the information given in the thread...



The overall dimensions are 150mm (W) x 150mm (L) x 17mm (H)

[bentleya]

Well i did start and it is rendering now, but it looks like you got a new helper so all is cool

[NaeKuh]

Naekuh, something like this? Wasn't too sure on the screw locations and your bolt through the middle, but this is what I was able to pull out from the information given in the thread...



The overall dimensions are 150mm (W) x 150mm (L) x 17mm (H)

the plate would need to be longer then the derlin because we need to torque screw the 2 plates together.

so its your piece x 2 torque'd together between 4 tec's

does this make sense?

but you need to place the torques so they dont crush the corners of the tec's.

AHHH metric i see we got you too!

NICE! Common guys, watever the final render will be, BEI will make it!

unless u make it like evil's which is almost impossible to mill.

Well i did start and it is rendering now, but it looks like you got a new helper so all is cool

LOL.... i really only asked ya, but im fully down for all the extra help. As i said, its going to production, so more hands the better!

[bentleya]

Righty V1



It's in plexi just to show off the inside. i need feedback on the inside and the outside

[NaeKuh]

Righty V1


It's in plexi just to show off the inside. i need feedback on the inside and the outside

BINGO!

Acrylic is nice to show.

The reason why we cant use acrylic as the final material is, well, 545W TEC's x 4 will make that plate very cold.

[bentleya]

so that right yeah?

so in your old one



The new one is 2 together on top and 2 together underneath ?