View Full Version : Converted Immersion Cooler.. suggestions?
boshuter
07-10-2006, 10:12 PM
I've had this Neslab immersion cooler sitting around for a while and finally got around to converting it to DD. Actually I did it a while back and used propane for my referigerant. I recently got a hold of some r507 and just redid the whole thing with new flex line, evap (cap in cap using Maze4 gpu base), filter and routing. I was getting -50c with propane and am getting -53c with the r507, unloaded (0psi low side/190psi high side), suction line frosted to within 1in of compressor. It seems to me that the temp should be better? Does anyone see anything I'm missing, or have wrong that would help with temps? I don't have any load tests yet, I'll stick it on my 950es Presler in the next day or so and see how it holds up to that.
Any suggestions or comments are appreciated :)
BTW.. the compressor is marked "AE151AT-20".. I can't seem to find any specs or info on it, if anyone has any knowledge of this unit, please lmk. ;)
http://i8.photobucket.com/albums/a5/boshuter/first-system-1.jpg
http://i8.photobucket.com/albums/a5/boshuter/507-temp.jpg
boshuter
07-11-2006, 05:27 AM
Anybody have any info on this compressor? I can't find anything on iit :(
Alex08
07-11-2006, 06:30 AM
looking at the model number its a tecumseh - 3100btu/hr - 1/4hp - made for r12 refrigerant
AE151AT - AEA3430AXA
El Snorro
07-11-2006, 07:09 AM
looking at the model number its a tecumseh - 3100btu/hr - 1/4hp - made for r12 refrigerant
AE151AT - AEA3430AXA
-53 unloaded for 1/4hp doesn't sound bad actually :)
boshuter
07-11-2006, 09:31 AM
-53 unloaded for 1/4hp doesn't sound bad actually :)
No I guess it isn't ;) I'm going to try to get it on the 950es tonight, that should be a good load test, that cpu brought it to it's knees when it was running on propane :eek: I hope it does a little better at load with the 507... if nothing else it will make a good gpu unit.
Blaster
07-11-2006, 09:47 AM
with 0 psi on low side your evap temp can never be lower than -49ยบ C with R507
looks like a good job !
johann
07-11-2006, 10:06 AM
-53 on 1/4hp sounds about rigth but surely running some vacuum to achieve that temp though.
190psi highside sounds a little high with R507 unloaded....
What captube sizing and length did you use and also what is static pressure?
Rockhammer
09-03-2006, 09:50 PM
Thread Resurrection! Hey Boshuter are you still around? I've finally collected what I need to try and convert my Nessy to a DD. What did you ever get going with this one? Damned if yours isn't the identical twin to mine. Right down to the half-painted out lable on the compressor.
BTW, did you notice that the condensor is carbon steel (tubes and fins). Why would they use that? Has to suck for heat transfer.
boshuter
09-04-2006, 07:54 AM
@ johann.... yes it was in vacuum at -53c, my high side was running right at 190psi, not sure of static pressure. I did the work and charging in the shop outside where it was very warm but did all the testing and running it inside the house where it was very cool.
I ended up with -44c idle and it would keep my 950es @ -27c running 1.5v 5ghz. I ended up with appx 9' of .031 captube.
Rockhammer.. don't worry about the condensor, if you use the fan that is in the unit it does an excellent job. I believe this is a "Blissfield" condensor, or sure looks like one... regardless, it's plenty of condensor for this unit. ;) Looking forward to seeing how yours turns out.
boshuter
09-04-2006, 08:00 AM
Here is a pic of the finished unit.... these things make an excellent way to get into phase change on the cheap ;) I've got a couple more about like them and 2 Neslab Cryocool cascades sitting here. I'm doing another SS and a chiller, then will get the cascades going when I can find some good second stage gas.
http://img481.imageshack.us/img481/8167/caseon1xv3.jpg
Rockhammer
09-04-2006, 10:57 AM
Nice work. Thanks for the update. I see you moved the flex line. I like that idea. The original location was crammed in too tight against the condensor. Would make it hard to insulate.
I was actually thinking of replacing that fan. It is kinda loud for my tastes.
Too bad you can't still get the R13B1 gas these things were originally charged with!
boshuter
09-04-2006, 01:07 PM
Nice work. Thanks for the update. I see you moved the flex line. I like that idea. The original location was crammed in too tight against the condensor. Would make it hard to insulate.
I was actually thinking of replacing that fan. It is kinda loud for my tastes.
Too bad you can't still get the R13B1 gas these things were originally charged with!
I replaced all the tubing except the one from the compressor to the condensor, along with a new filter and cap tube. I scrapped the hose flex line and went with a stainless steel 24" flex. I agree the fan is too loud, and that much fan is not needed with that condensor, you could either replace it or slow it down somehow.
I don't know about R13B1.. but I doubt it's as good as r507 or r402a ;)
Athens[2004]
09-04-2006, 01:19 PM
Very Nice convertion :toast: :clap:
Rockhammer
09-04-2006, 02:38 PM
I replaced all the tubing except the one from the compressor to the condensor, along with a new filter and cap tube. I scrapped the hose flex line and went with a stainless steel 24" flex. I agree the fan is too loud, and that much fan is not needed with that condensor, you could either replace it or slow it down somehow.
I don't know about R13B1.. but I doubt it's as good as r507 or r402a ;)
Did yours have a rubber hose flex line? Mine looks like braided brass, but I supposed could be braided stainless. I'm going to try and reuse it. It is way too long, but oh well. I will have to completely remove it and relocate it as you did.
I already have the new cap tube and filter dryer, but haven't put them in yet. I've been working on the evaporator today.
I notice that you didn't run the cap line through the suction line as was done in the original. Is there any benefit to doing it one way or the other?
boshuter
09-04-2006, 07:40 PM
The original flex line was a rubber hose with braiding, same as yours. I guess they are ok, it was just longer than I needed and as they get older they tend to leak.. some refrigerants will actually leak right through the hose. I didn't run the cap tube through the suction line because of the way the cap tube enters my evap.
Rockhammer
10-12-2006, 06:52 AM
Boshuter, are you still working on/using your converted Nessy? I just finished mine and got it up and running on the PC for the first time last night. Mine is charged with R290 and is getting evap temps of -35 under full load with CPU temps of around 1 to 2 degrees. That is on a single-core Opteron running 3100 at 1.55v. I haven't had a chance to try cranking it any higher as I was getting a bit of condensation on the outside of my evaporator housing and had to shut it down.
All in all, I'm pretty please with the way it came out. I was treating this project as a learning experience without a lot of expectations for good results. But really, the way it is looking I might just run this for a while before building one from the ground up.
Clemmaster
10-12-2006, 08:15 AM
Very nice
Have seen plenty of those neslab units at www.labx.com ( they are sold as auctions I think.
nice unit :toast:
Rockhammer
10-15-2006, 05:43 PM
Yep, that is where I got mine. Like Boshuter said, converting one of these is a great way to learn about phase change. You basically have everything you need except an evaporator. All I did was change out the filter-drier, relocate the suction line, and add a schrader valve to the low-side. You could probably get away with not doing any of that.
So far, so good on mine. I think I'm stuck at 3200 on my Opteron due to bus issues, but I'm pretty happy at this point.
edit:
Oh, I also changed out the stock fan for something quieter.