Author Topic: Small Phase change build R600a  (Read 863 times)

Offline DashApple

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Small Phase change build R600a
« on: August 05, 2019, 06:16:35 PM »
Hi All .

This was my first attempt at building a small phase change system and want to share the results

There was no real gain to be made from this on the CPU other than for the building experience : ) .
Specs are -

Secop 30AA 3cc R600a compressor
2.8m 0.8mm Capillary tube .
120mm 13W AC fan and 120x120x50mm condenser .
CPU is a i5 3470 ( around 85 - 90W Load )


The evaporator is a copper plate with 1/4" copper pipe coiled and brazed to it .  Under no load evap is -6C , Low side is 1PSI ( -10C Boiling point on R600a ) , Suction line 6" from compressor is -1 to -2 C so superheat is around 8C under no load .


Loaded 100% the temperatures are -1C to 0C evap and 18C reported by the CPU .


PCB is full coated in varnish on both side around and under the CPU socket , Then filled with silicone grease and lined around it with armaflex insulation ( still need to do some more insulating ) .


Not the best looking but i am happy with the results for a first attempt : ) .

IMG_20190805_132413 by TwirlyWhirly555, on Flickr

Offline Hydron

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Re: Small Phase change build R600a
« Reply #1 on: August 12, 2019, 07:27:23 PM »
Wow, missed this thread before - looks like quite a fun and successful first build! I'd love to have the knowledge and time to build something like this - I remember reading some very interesting threads years ago (on Xtreme systems or something) about people building multi stage phase change systems, so it seems the rabbit hole goes a bit deeper yet.

Offline DashApple

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Re: Small Phase change build R600a
« Reply #2 on: August 15, 2019, 06:23:40 PM »
Thanks : ) , There was a few issues to get through but in the end it turned out well .

Xtreme systems was and still is a very good place to go for phase change , there is a massive section full of builds and info threads , alot of what i learned was from there : ) .


Some of the cascade and auto cascades on there are crazy , I too would love to be able to do that but for now the simple single stage is where i will probably stay .

Offline klugesmith

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Re: Small Phase change build R600a
« Reply #3 on: August 26, 2019, 06:19:05 AM »
Very nice.
Is "Phase change" a buzz word these days, for a way to cool overclocked CPU's?  Does pressurized refrigerant circulate inside heat-sink parts and boil right there?

Offline Mads Barnkob

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Re: Small Phase change build R600a
« Reply #4 on: August 26, 2019, 03:32:48 PM »
Very nice.
Is "Phase change" a buzz word these days, for a way to cool overclocked CPU's?  Does pressurized refrigerant circulate inside heat-sink parts and boil right there?

Seems to be a buzz word for a vapor compression cycle that is carried out by a refrigerant system: https://www.es.aau.dk/sections-labs/Automation-and-Control/Laboratory+facilities/refrigeration/refrigeration-cycle/
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Re: Small Phase change build R600a
« Reply #4 on: August 26, 2019, 03:32:48 PM »

 


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