my 3 stager!

[runmc]

The one problem I had with my three stage is clogging of the third stage expansion valve. I did find some trash in the pev filter I was using for the 3rd stage. I'm sure that didn't help any. Be sure and purge everything while brazing. Maybe some major subcooling on the discharge before the gas reaches the third stage oil filter would help. I would say add a little propane but I don't think you need it with the 1150. If you use r14 with some propane and subcool before oil filter, there is a possibility the propane will condense and take oil with it when it gets to the oil filter.

Very nice power you have going Ricky. Best Wishes [[ ]] with the three stage

[Brettbeck]

Nice ! Make sure you have some nice air flow round those compressors, they look very close together.

[N3RO]

so clean :O

this cascade will be into a box?

happy new year

[|RickY|]

runmc: thanks for the experiences, i'll have all of them in mind as i'm making the cascade

Brettbeck: dont you see the big ing fan on front of thar babys?

nero: yes it will have a nice box

[Brettbeck]

Brettbeck: dont you see the big ing fan on front of thar babys?

Yeah I just thaught you might still need some more fans . Cos wont the air beind that condenser fan be warm from the hot gas?

[nachthymnen]

What a beast!
Beautiful work like always.

[Moc]

Yeah I just thaught you might still need some more fans . Cos wont the air beind that condenser fan be warm from the hot gas?

Air behind condensor will be perhaps 35/40°C ... cold enough for cooling 90°C hot rotarys...

[skirms_fr]

i ve test my 3 stages with a E6400 and 1.71 vcore but i have a problem , my second stage is too cold :/

HP on third stage is less than 10 bar when both comps are running and i havent enough flow in evap.

so i ve try to cut second stage , and HP on third stage increase to around 15B , and around -115 under windows

i ve ever done that at our ln² party :


so be carfull you second stage is not too cold

[Moc]

HP on third stage is less than 10 bar when both comps are running and i havent enough flow in evap

Can't you make the HP higher if you charge some nitrogen or argon into?
I think you have R1150 in your second stage, a change to R23 would be better for pressure in the third stage ...

[Brettbeck]

Air behind condensor will be perhaps 35/40°C ... cold enough for cooling 90°C hot rotarys...

I suppose so . With blades of that pitch I would expect a LOT of airflow, I just thaught the air around the condenser would be too hot to have much cooling effect on the compressors.

[skirms_fr]

condenser is not so hot

not a bad idea about argon i will try

[n00b 0f l337]

If you can get the argon in gas form to around -100C you have a chance that it will try and saturate the r1150 lowering the BP.

[|RickY|]

skirms_fr, have you tryed argon yet? it can be a good way if you could get 2nd stage near -100

my cascade is going,
1st stage is on vacuum, eletrics from compressores done and tested, hx's probes instaled,
just need to buy mineral oil for separators, make the evap and take some time finishing 2nd and 3rd stage piping.

[Brettbeck]

Nice Ricky ! Have you decided upon the final gas mix yet?

And why do you need mineral oil for separators ?

[|RickY|]

i'll use for now ethylene on 3rd stage while i dont buy r14

my 2nd and 3rd compressores are for r22 so it has mineral oil,

have anyone tryed ethylene+argon on 3rd stage?

[n00b 0f l337]

It may possibly work Ricky, I'd like to see it tried.

[skirms_fr]

i ve just try to fill a small amount of argon in my 3 stages cascade , it s halp a lot , i ve a better HP on my third stage and a good temp under windows

E6400 @ 4500 with 1.71 vcore , i have idle temp at around -120

i think i have too much gaz in third stage (argon)
i ve use ARGON nertal we use to sold TIG

and the 3 rotary increase very much the ambiant temp in room xD

[Brettbeck]

It may possibly work Ricky, I'd like to see it tried.

I second that. Would be interesting to see some results with R1150 / Ar on the third stage .

[|RickY|]

no leaks on 1st stage
some more work, need to buy mineral oil for sep's and finish the evap.
i'v been very ing busy becouse university...

i'll try ethylene + argon on 3rd hummm just need to get some argon :S



inside of cpev:

[Duniek]

no leaks on 1st stage
some more work, need to buy mineral oil for sep's and finish the evap.
i'v been very ing busy becouse university...

i'll try ethylene + argon on 3rd hummm just need to get some argon :S

http://img128.imageshack.us/img128/9049/1eu1.jpg

inside of cpev:
http://img161.imageshack.us/img161/3370/cpevqb6.jpg

no leaks - great

this is a "FACH" cpev ??

[star882]

You might want to put a band of colored tape on one of your gauge hoses (or even replace a hose with one of a different color) so you will not confuse the two and break the needle off the low side gauge. That has happened to a professional once and costed him about $35 to fix it. (Come to think of it, also put some tape on a pipe connected to one of the service nipples to remind you which side is which.)
I'm not very sure but I think there's also an adapter inserted in line with the low side hose that cuts off flow before the low side gauge is damaged. That might save your gauges in case you do connect the hoses wrong or you're working on a heat pump (with the gauges connected after the reversing valve) and the reversing valve switches unexpectedly.

[|RickY|]

duniek, what is a "FACH" cpev? :S the cpev is the one on this pic:
http://www.xtremesystems.org/forums/...0&postcount=77


star882, well, this is only for vaccum, i didn't pay atention to gauge hoses, about low and high side service valve, it's easy to know what it is becouse one comes from suction and another from discarge on the other stages will be the same

[Duniek]

duniek, what is a "FACH" cpev? :S the cpev is the one on this pic:
http://www.xtremesystems.org/forums/...0&postcount=77


star882, well, this is only for vaccum, i didn't pay atention to gauge hoses, about low and high side service valve, it's easy to know what it is becouse one comes from suction and another from discarge on the other stages will be the same

http://img186.imageshack.us/img186/8593/fachkq3.jpg
I think is the same as you

regards

[LukeXE]

RickY,is that cPEV from me ?

[|RickY|]

hummmmmm i think yes, i get it by ratax, a friend from portugal, he buyit from someone i dont remember.... very probably you! i'll use it with 1.5meter of 2mm cappilar what you think?