Post Rad Chiller Concept

**Scarlet Infidel** · 05-05-2008, 11:53 PM

I commend Uncle Jimbo for his deep knowledge and taking the time to explain things. I still think your posts might seem a little daunting to to some. I may write a guide at some point and then you and anyone else who knows about the area can help improve it.

I found this very useful. Looking at curves are all well and good, but knowing the formulas used to make the curves is a lot more useful. That PDF contains all the essential equations and a lot of useful information and even a case study.

I have been implementing those equations in a computer program to calculate peltier characteristics. I have a few things to clear up, other than that it seems to be going quite well, watch this space.

**Uncle Jimbo** · 05-06-2008, 12:19 AM

Originally Posted by Scarlet Infidel

I commend Uncle Jimbo for his deep knowledge and taking the time to explain things. I still think your posts might seem a little daunting to to some. I may write a guide at some point and then you and anyone else who knows about the area can help improve it.

I found this very useful. Looking at curves are all well and good, but knowing the formulas used to make the curves is a lot more useful. That PDF contains all the essential equations and a lot of useful information and even a case study.

I have been implementing those equations in a computer program to calculate peltier characteristics. I have a few things to clear up, other than that it seems to be going quite well, watch this space.

Very nice and easy to read - Thanks!

**Uncle Jimbo** · 05-06-2008, 05:29 AM

Originally Posted by Scarlet Infidel

I commend Uncle Jimbo for his deep knowledge and taking the time to explain things. I still think your posts might seem a little daunting to to some. I may write a guide at some point and then you and anyone else who knows about the area can help improve it.

I found this very useful. Looking at curves are all well and good, but knowing the formulas used to make the curves is a lot more useful. That PDF contains all the essential equations and a lot of useful information and even a case study.

I have been implementing those equations in a computer program to calculate peltier characteristics. I have a few things to clear up, other than that it seems to be going quite well, watch this space.

One problem area you may find is that you don't know dimensions of the TEC elements. You probably can get those by taking the number of elements and max I and Qc, and working backwards to solve for element geometry...

**THE JEW (RaVeN)** · 05-06-2008, 09:15 PM

Thanks for the example! I don't have time to go over it right now (implementing Leica's GPS1200 base stations at the engineering company I work for is taking longer than expected), but I'll brush up on 'em this weekend and see if I can't fire back my own example. I figure if I can work through my own, I'll at least have a half decent handle on it. Happy TECing.

**Scarlet Infidel** · 05-07-2008, 02:02 AM

Originally Posted by Uncle Jimbo

One problem area you may find is that you don't know dimensions of the TEC elements. You probably can get those by taking the number of elements and max I and Qc, and working backwards to solve for element geometry...

Yes, I was having that problem. If you know enough of the right details you can work backwards to get all the rest, it's not ideal though.

**NaeKuh** · 05-15-2008, 06:55 PM

Originally Posted by Uncle Jimbo

With the TEC at 300W and a 200W heat load, and the thermostat set to 18C (the lowest it could go), I powered up the system. The res got to about 17C in a little over 20 minutes, and the TEC switched off. After about a minute, the water in the res got to 18.5C and the TEC switched on. It stayed on for about 2 minutes, the temp went back to 17 C, and the TEC switched off. I ran it for another 20 minutes or so and the duty cycle was very stable, running 2 minutes on, 1 minute off and maintaining temp between 17 and 18.5C with a 200W load.

okey i need help building something like this. Or rather would you be willing to build something for me.

PM me a price.

Or NOL can you build something like that which has a slot for a 2 prong inline probe?

**n00b 0f l337** · 05-16-2008, 03:50 AM

Wait wha?

**NaeKuh** · 05-17-2008, 09:07 AM

Originally Posted by n00b 0f l337

Wait wha?

what jimbo said.. i want.

a Thermostat option!

**n00b 0f l337** · 05-17-2008, 10:58 AM

Inline? What does the thermostat look like.

**systemviper** · 05-17-2008, 11:06 AM

Originally Posted by NaeKuh

okey i need help building something like this. Or rather would you be willing to build something for me.

PM me a price.

Or NOL can you build something like that which has a slot for a 2 prong inline probe?

Hey NaeKuh, what ever happened to the blocks martin built for you....? they were very cool.

**n00b 0f l337** · 05-17-2008, 11:08 AM

The TEC block chillers? Still here with me, and on that, got a second pump yet Naekuh?

**Uncle Jimbo** · 05-18-2008, 03:13 PM

Originally Posted by n00b 0f l337

Inline? What does the thermostat look like.

You can use a regular thermostat and a relay in the cold supply to control TEC power - I tested it and did a write-up somewhere on the forum. I just used an old mercury thermostat as a bang-bang controller. They are pretty slow so the duty cycle is not going to stress the TEC, and with a degree or two as the hysterisis it also won't be thermal cycling the TEC.

**systemviper** · 05-18-2008, 03:17 PM

Originally Posted by n00b 0f l337

The TEC block chillers? Still here with me, and on that, got a second pump yet Naekuh?

so what the plan for them, i have been waiting to see sombody try to get them going, it's will be sweet, since they are a one of a kind......

**NaeKuh** · 05-20-2008, 06:59 AM

Originally Posted by n00b 0f l337

The TEC block chillers? Still here with me, and on that, got a second pump yet Naekuh?

havent pulled it off the current server yet.

Dave is lagging on my sossoman chips. :T

**NaeKuh** · 05-21-2008, 11:45 AM

NOL, you want me to just send you a DB-1?

I can mail that out today or tomorrow.

I realized i have too many friggin pumps so im not going to buy anymore. Gonna pull the dual alphacool out and throw the RD-30 back in.

Sorry RD-30 > dual DDC-3.2 Even martin agree's.

**n00b 0f l337** · 05-21-2008, 01:49 PM

O okay sounds good

**NaeKuh** · 05-21-2008, 02:34 PM

mail you out the DB-1 tomorrow.

Sorry Nol, as i said dave is taking his sweet long time mailing out my sossoman chips.

I dont mind the wait, its just holding you back tho. And everyone is getting on your butt now that you have the blocks and i feel bad.

Remember guys NOL is donating his time, hence why im being so patient.

**Clue69Less** · 06-08-2008, 07:56 AM

Originally Posted by n00b 0f l337

The TEC block chillers? Still here with me, and on that, got a second pump yet Naekuh?

Are they in the wine cellar aging to perfection or what?

**n00b 0f l337** · 06-08-2008, 01:22 PM

Just waiting on the other pump. Naekuh, maybe we should consider getting some large extruded aluminum heat sinks, then break the big unit apart, one water loop and then two air cooled sinks

**Uncle Jimbo** · 06-08-2008, 11:11 PM

Originally Posted by n00b 0f l337

Just waiting on the other pump. Naekuh, maybe we should consider getting some large extruded aluminum heat sinks, then break the big unit apart, one water loop and then two air cooled sinks

some nice bonded fin sinks here:
http://www.aavidthermalloy.com/produ...standard.shtml

they have some big ones in stock and also custom build, so you could probably get an exact match to the size you need. I assume that is just until you get the pump...

Also trying to get some very large Chinese TECs but it will be a while before I manage that based on first response...

Did you ever decide on the TECs you want to use? Also did you look at the PWM control at http://www.xtremesystems.org/forums/...0&postcount=12
that would let you run at better efficiency and still give power when needed

**NaeKuh** · 06-10-2008, 05:36 PM

Originally Posted by n00b 0f l337

Just waiting on the other pump. Naekuh, maybe we should consider getting some large extruded aluminum heat sinks, then break the big unit apart, one water loop and then two air cooled sinks

uhhh wanna grab them for me and then bill me?

How much are they each? however i just picked up a 480GTX to keep that hotside COOL.

Blame it on martin. His Fault.

NOL i ended up using the DB-1. I got pissed off at my aircooled GPU's. Your gonna need to wait til the weekend for the D5. I finally got sammy up and running so the other quad should come down.

However im debating on just buying you a pump and having john send it to you.

**Clue69Less** · 06-23-2008, 08:09 AM

Anxious to see results... TEC-teaser!

**systemviper** · 06-23-2008, 08:17 AM

Sounds like they got a good plan it just has a lot of moving parts..

**n00b 0f l337** · 06-23-2008, 08:19 AM

Any updates on that pump mate?
Or have you looked into big heatsinks yet?

EDIT:
Take a look:
http://cgi.ebay.com/Aluminum-Heat-Si...QQcmdZViewItem

**Uncle Jimbo** · 06-23-2008, 11:18 AM

Originally Posted by n00b 0f l337

Any updates on that pump mate?
Or have you looked into big heatsinks yet?

EDIT:
Take a look:
http://cgi.ebay.com/Aluminum-Heat-Si...QQcmdZViewItem

WOW! Nice! Someone should get that sink.

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