Worlds easiest chiller for numbskulls

[zakelwe]

Ok, my " Dummies chiller " is now up and running tonight again after buying my cheapo Hanna CheckPoint1 thermometer !

I actually converted a freezer using the packing it came in for insulation around the top lip, see here

http://www.xtremesystems.org/forums/showthread.php?s=&threadid=22968&perpage=25&pagenumber=24

Note No refrigeration units were hurt in the making of this chiller.

This is important if I want to sell it again and also it makes it easy for people like me who do not even have a pipe bender ;)

Right, now todays testing.

First I tested my new Hanna thermometer in boiling water :-

http://www.aocb77.dsl.pipex.com/atemp1.jpg

Looking up the boiling point of water in my physics book it turns out this is pretty close.

Now Gary advised I bypass the thermostat on the freezer, but looking at the manual it says that Warp 5 on the scale makes the condensor run all the time, me takes this to mean a built in bypass ( correct me if I am wrong Gary ! ) . So up to Warp 5 and we have

http://www.aocb77.dsl.pipex.com/atemp2.jpg

I thought freezers were -18C so this was a pleasant surprise.

Now, unfortunately my lqiuid holder is plastic and an insulator so even after 22 hours of surface cooling it is only at

http://www.aocb77.dsl.pipex.com/atemp3.jpg

[zakelwe]

oh hit the wrong button there ..

Now this is Ok as I know what I need to improve it with tweaking and so this will be my worse case scenario. Anyhow tonight I am trying to find what an 80w load will do to the liquid after a couple of hours as of course my cheap easy system has very poor capacity.

Getting back to the plot here is the system

http://www.aocb77.dsl.pipex.com/atemp7.jpg

One pump, two blocks ( gpu and cpu in tandem ) and the Peltier cooling.

Here is the temp on the un-insulated non Peltiered cpu block

http://www.aocb77.dsl.pipex.com/atemp4.jpg

And here is the Peltier block

http://www.aocb77.dsl.pipex.com/atemp5.jpg


Now I wait an hour and see what happens.

Regards

Andy

[Tedinde]

Im guessing you dont want to take the fridge apart and just put the coils in the liquid, That would make it more effiecient. I've never seen what your doing work very good in the past.

And i've seen it many times.

But with a 80watt load only it will probably handle it.

[zakelwe]

Originally posted by Tedinde
I've never seen what your doing work very good in the past.

And i've seen it many times.



Very true, but were they British ? We built the world you know, out of rivets ;)

I might take a fridge apart eventually, but maybe not, depending how far I can get with my tweaks and what I need it for.

I need it for 2 hours of 3d benching with 12 hour pull down time between runs so I know I can get this with simply enough coolant and better contact with the sides, but the fun is in tweaking step by step.

After 45 minutes I am at -5C and -15C, not bad to be honest considering the first design.

[zakelwe]

2 hours is up and a very interesting result.

The cpu block has now reached 5C but the Peltier cooler on the gpu block is still at -15C and has a thick rim of condensation around it !

So at start Peltier - -19C and normal block = -10C, now -15C v 5C, so the delta has gone from 10 to 20.

Will stop now and try again tomorrow from cooler temps.

Regards

Andy

[Slickthellama]

you didnt know that the boiling point for water is 100C? LOL, just so you know it freezes at 0c. good work tho.

[kommando]

Looks awesome, nice n' simple :)

[zakelwe]

Originally posted by Slickthellama
you didnt know that the boiling point for water is 100C? LOL, just so you know it freezes at 0c. good work tho.


I have a strange sense of humour :D



Regards

Andy

[kommando]

Mmm im doing this now while i buy a compressor, thats if i can fit the fridge in my room :S