Captube length for R290

some pics from the process...It wasnt leakproof at first try...and not at the second time but after testing for leaks with R134a wi got it to hold preasure.

:)

The frost was all the way to the compressor on the suctionline:) This is what the fluke said:

I had some troubles mounting the evap on my board so no loaded temps yet, but insulated evaporator went down to -37c acording to my cheap as hell thermometer:) Then ice started building up on the suctionside of the compressor and the temps didn't get any lower.

Tomorrow I will get some bolts that are long enough to get this mounted to my mobo. It ain't gonna be my 24/7 cooling as it is louder than my threshold of noise, but it will get me some nice benches as soon I get it mounted properly. I hate insulating and condensation profing my mobo. Lots of vaseline and armaflex and duct tape will have to do it for now:)

-42c broken without load:D Seems that my temp probe reports lower temps when the block is on its side rather than mounted on a mobo...might be beacause now it's on the lowest side->wet surface. But now I have to go to work. WIll update when I get back home.

nice work
so did ya charge with r290 in the end, or r134a

It is filled with propaine:) Too much actually, but now I got bolts that are long enough and a huge tube of vaseline so I'll be back in busines just after I take a long shower and have something to eat...

-32 on the evap with 2.4 northwood@1.825(1.75 real) under full load(prome small ftts and superpi 32M)

For some reason my AI7 can't read my cpu temps properly when socet is full of vaseline even tough it should read from the internal sensor and not from the socket...

The compressor is running wery hot and making a weird noise(hig frequency noise) so maeby I will need to let some more gas out... I just hope I dont need to ad some oil to it because I don't have any compressor oils.

the compressor is ment to run hot
can you hold you hand on it for a few seconds, i think they are ment to run 60c plus (not sure exact temp which is ok, maybe someone else could post operating temp of compressors?)
before you said that the system was making too much noise for your liking ie running 24/7, you said that its a 1/5 HR compressor whats it out of.
is it the fans that are making too much noise?
well done anyways. that direct dire block seems to be doing the job

The compressor is 1/2hp Danfoss SC10D..Ment to be oil cooled but it never has been cooled that way. It is definantely running hotter than 60c. but I will have to stop for now. I will continnue when I get back.

i have a air cooled compressor i think that is only used when they run static condensors to help keep the oil from burning
did you buy it new/secondhand or get it out of something

hey you got some more pics of the system all finished

I took it from an old freeser that shops use to store ther icecreams etc... I didn't notice any waird noises coming from it when I tested it to see if it works, but it was on for only few seconds so I could be wrong...The thremometer says-34c at this moment @1.825v and 3300mhz on full load. Wait it dropped to -35 for a second:) Ambient temp is 22c. Too bad my CPU temp still says 0c...I will just have to hope the sensor will start working again. I will post some pics if I find anything usable since I dont have any camera at the moment.

Here's one:

And heres a better one.Still without the insulations tough:

It would apear that I have a leak somewhere in the sytem:(

This morning it was doing -33c at full load but when I got back home from work I put the compressor running and waited untill it went to -30c and fired everything up. while I was browsing the web, I noticed that my evap temp had gone up to -14c! And that was with only folding@home running in the background and at 50%load...

The project is now on hold untill I get my first paycheck(maybe in a month or so) and then I get proper gauges and start really troubleshoot and finetune the system. I might end up changing allmost everything in the system if I get the inspiration. Actually I wasn't even satisfied on how this compressor preformed and the noiselevel and weird noises it made got me thinking on getting a better one. I still have the 1/5hp aspera that didnt make any funny noises so I might test how well it preforms or just use both of these as a vacumepump...

Well this was my first try at phase change so I can be quite pleased on the results I got.Better luck next time:)

It's great what you have done on your own, I'm sure that your next proyect will be better than this with the experience you had gained.

Thanks:)

I might try to make a very samall direct die system out of the 1/5hp aspera that I could fit in a small case like a prommy... Or another powerfull system If I can find a suitable compressor somewhere:)

hatemi..if ur cpu was at -15 with cpu at 50%...im think its pretty justifiable, nyways..awsome project

im guessing its leaking from the hoses where it screws onto the schaeder valve.
put the hole evap into a bucket of water so it covers the evap plus hose fitting.
i found that mine was leaking there the other day.
the other end of the hose was a little harder to tell if leaking though.

Soap+Water is the way to go when searching leaks :).

http://upl.silentwhisper.net/uplfold...apy_water_.JPG

Ill have to test with soap water but it's going to be in next week because I'm going to a festival this weekend to see bands and get very very drunk. Hey what else did you expect? i'm finnish after all... First things first;)

I'll post some pictures of the system as it is at the moment. This is picture of the evap base after I took it apart. Contact was quite nice:)

And this is what the insulation looked like:

I found the leak. I tried soapwater in every possible place in the system, The connectors, brawed joints, even the valves but I needed to rip the insulation fromm my evap and sink it in a bucket. It was leaking a small buble every five seconds or so:( I will propably make another evap with somewhat similar design as the baker block has. and I have an idea of a small and easily made evap for gpu too:) I will post the design if I can get it done with cad.

what did you use as a hold down when mounting to the mother board.