View Full Version : Which pelt for -53C ?
milos
12-07-2003, 05:13 PM
Hi,
I am new to this Peltier stuff, I am building a vapor phase change system, and my cold plate gets down to -53C (-63 F), what would a 226W pelt do to it ? How will it help my system ?
....
I am also working on a W/C system, I need a really good block ? What block will be the best for p4 ? what temps will I get with it ? should i get one with the pelt or without..let me know..thanks
one more questions..how do pelts work ? i know they have hot/cold sides, if someone can explain that to me, that would be great.
milos
Pimpsho
12-08-2003, 11:58 AM
1) if u have a phase change unit that gets below -50 then a 226watt tec would more then likely keep ur cpu warmer.. since tecs do not work at that low of a temp. and second ur phase unit wouldnt even be able to dissipate that much heat since the mach1 is only rated to like 170 watts or somehting im not sure on that one so if u did slap a tec on it that would be 226watts + ur cpus watts that its creating so ur phase unit would prolly go tits up on u.
2) if u building a wc system thers a lot of good blocks out there like the maze4 and the swiftech mcw5000 and whitewater.
3)not to sure how pelts work but iknow how to wire em up and get good temps:toast:
Vitalizer
12-08-2003, 12:08 PM
u will never get -50c with pelt
milos
12-08-2003, 01:14 PM
k thanks guys
Pimpsho
12-08-2003, 01:14 PM
Originally posted by Vitalizer
u will never get -50c with pelt
very true...
Pimpsho
12-08-2003, 07:51 PM
Originally posted by MickeyMouse
LMFAO I get -42 to -43c wiht my 172w tec at 18v with -10c chilled water wiht no load Im sure -50c can be done wiht a high power PSU and a chiller wiht the 226w tec "NO LOAD" of course
holly ยงยงยงยง i want those temps!!! what was that idle on though? stock cpu? or gpu?
sandman
12-08-2003, 07:58 PM
That was without any load. Like the bottom of the waterblock hanging in the air.
Pimpsho
12-08-2003, 08:01 PM
ahh well thats not that hard then lol ill see what i get with my 226watt tomara;)
NitroRat
12-09-2003, 03:47 PM
my 226 gets to -13c with room temp water with no cpu load ...
-100C is do-able with no or a small heatload (read small as 7w or less) using a tec stack. Its whats in most IR cameras, although some of the more expensive kit uses small stirling engines now.
]JR[
Chris_F
12-10-2003, 04:17 PM
Originally posted by ]JR[
-100C is do-able with no or a small heatload (read small as 7w or less) using a tec stack. Its whats in most IR cameras, although some of the more expensive kit uses small stirling engines now.
]JR[
Yeah but put 120W of heat on it and it would be more like 100C.
TECs don't work well with phase change cooling.
Oh im talking tec stack alone for -100c, not tec on phase change.
Tecs would work very well in the right phase change application, the problem with tecs is the way we use them, due to the space constraints.
]JR[
Originally posted by ]JR[
-100C is do-able with no or a small heatload (read small as 7w or less) using a tec stack. Its whats in most IR cameras, although some of the more expensive kit uses small stirling engines now.
]JR[
stirling engines??? any links mate ?;)
would like to do some reading on it :)
Originally posted by MickeyMouse
LMFAO I get -42 to -43c wiht my 172w tec at 18v with -10c chilled water wiht no load Im sure -50c can be done wiht a high power PSU and a chiller wiht the 226w tec "NO LOAD" of course
With load and 100watt CPU you should be getting -15C, with perfect insulation and perfect contact surface that is :)
Pimpsho
12-11-2003, 07:52 PM
Originally posted by Jabo
With load and 100watt CPU you should be getting -15C, with perfect insulation and perfect contact surface that is :)
is this with ambient water?
He quoted chilled water to -10C ;)
But in real life he will be closer to -10C with 172 module.... - due to insufficient insulation. Only use of 226 modules make any sense in such application - enough overhead to make it work but then again it'd be hard (I think?) to find chiller able to handel close to 400watts heat load (CPU & GPU modules)
Originally posted by Jabo
stirling engines??? any links mate ?;)
would like to do some reading on it :)
Search NASA and JPL's site(s) they are the world leader in the technology, they use it for cooling IR and Xray detectors in satellites and telescopes.
Reverse turbo-brayton cycle makes for some interesting reading too!
]JR[
*slober*, *slober* on my way :)
Cheers!
Also see the 'autocascade design' thread and 'helium compressor' thread in phase change section of this forum ;)
]JR[
Nice stuff this Stirling contraption.
It says there it goes to -80C but I didn't get to the bottom of it and couldn't find loads so far but I am still trawling this site (btw, they have most fantastic piccies there, my fav is X-ray shot of Sol). Turbo thingie will be for desserts :)
Now checking phase change...
80K generally from a 1 stage stirling engine not -80C ;)
]JR[
Pimpsho
12-12-2003, 06:13 PM
Originally posted by Jabo
He quoted chilled water to -10C ;)
But in real life he will be closer to -10C with 172 module.... - due to insufficient insulation. Only use of 226 modules make any sense in such application - enough overhead to make it work but then again it'd be hard (I think?) to find chiller able to handel close to 400watts heat load (CPU & GPU modules)
yea me and my pops are building a fat work bench! so he said we would get some copper tubbing and fix my ac/unit that sprung a leak so i can see how good i can get on my temps:toast:
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