Chillers from scrap

[Myhre]

I finally got the itch to start messing around with some of my old chillers. This is one of the first low temp chillers I built. The problem that I've run into with this unit is that at the temps I want it just doesn't have the capacity that I need. I've settled on running this unit at around -30C which should give me all the capacity that I'll need, while still giving a very quiet running chiller. I'm thinking about building a new chiller that could easily run down around -50C under load. I just have to decide on the layout.

 

[Herr Rogers]

WHAT! That thing has a ball of ice around it! How does that even create if you haven't dipped your waterblock in water? Does it just freeze the condensation created and it builds up?

 

[Myhre]

WHAT! That thing has a ball of ice around it! How does that even create if you haven't dipped your waterblock in water? Does it just freeze the condensation created and it builds up?

I actually had a bucket of water sitting on my bench that I dipped it into for a few minutes.

 

[jcw122]

I actually had a bucket of water sitting on my bench that I dipped it into for a few minutes.

Pretty awesome Myhre...took me a few seconds to figure out what it was, so cool (literally) !

 

[9mmCensor]

that is pretty damn sweet man

 

[Cap'n Pedro]

So neat and tidy as well!

 

[Albaholic]

what compressor is that? if you dont mind me asking

 

[eystan]

sweet work man

 

[lclark2074]

how big is that compresor.

 

[Pf.Farnsworth]

Its hard to get a DD to stay at -50c under load without mixing gasses or cascading. I dont see this happening, not at -50c under load anyway. You would need a refrigerant with a bp better then the once commonly used for this application ie R404a / R402a / R507 / R290. Maybe Co2 or even R116 or R1150 but with those your head pressure will be incredibly high and you will need one hell of a compressor to handle the load. Those refrigerants are normaly 2nd or 3rd stage in a cascade. That should hit your electical bill like a sack of rocks, that and the noise it will make. Think expantion tanks too >< plus you will loose alot of efficiency and thus cold converting from evap to water to cpu rather then straight to cpu, which is why you dont see chillers at -50C under load.

I am not saying it cant be done but I dont see the "quiet running" part. The colder you go the harder it is to get colder. -30C is a pushover, -40c chiller is very hard, and -50c under load? I dont know.

I spend most of my time on http://www.xtremesystems.org/forums/index.php? I have yet to see a -50c under load chiller. Do some reading at xtremesystems