2-Stager unit [Archive] - XtremeSystems Forums

before

10-15-2007, 08:16 AM

1st stage

Compressor: LG NP407P (25,000Btu/h; 40.7cc/rev)
Condenser: 1.9kW + Fan
HSP Service Valve: Schrader
HSP Manometer: Wigam ML60/18C4FA/A8
Reciever: Frigomec 1.6l + Alco rotalock valve SR1-WDB
Filterdrier: Copper 50gr
Expansion Device: Alco TXV TI-SW (w/ TIO-01)
Heat Exchanger: Harle compact brazed plate HX B3-12A (12pl)
LSP Service Valve: Schrader
LSP Manometer: Wigam ML60/38C4FA/A8
Refrigerant: R404a

2nd stage

Compressor: LG NP362P (21,900Btu/h; 36.2cc/rev)
Oil Separator: ShineYear Automatic
HSP Service Valve: Schrader
HSP Manometer: Wigam ML60/18C4FA/A8
Filterdrier: Copper 50gr
Expansion Device: Honeywell CPEV AEL1
LSP Service Valve: Schrader
LSP Manometer: Wigam ML60/38C4FA/A8
Refrigerant: R1150 or R1150/R50/R290 blended
Others: Desuperheater + Fan, Cold_ice's Evap + succion line, and of course something for safety.

Today, I've painted the condenser in blue and brazed few things as well.

http://img90.imageshack.us/img90/8381/45kbtusmj1.jpg

http://img90.imageshack.us/img90/9762/45kbtutpc1.jpg

http://img156.imageshack.us/img156/7428/45kbtuuff5.jpg

http://img148.imageshack.us/img148/876/45kbtuvwo3.jpg

http://img148.imageshack.us/img148/1471/45kbtuwrr0.jpg

http://img148.imageshack.us/img148/678/45kbtuxam3.jpg

http://img148.imageshack.us/img148/6933/45kbtuzex5.jpg

http://img148.imageshack.us/img148/2130/45kbtuaahd3.jpg

More to come. :)

Polizei

10-15-2007, 08:48 AM

Looks good so far. Specs?

Jack

10-15-2007, 12:31 PM

Those compressors look fat :D

TopherTony

10-15-2007, 03:06 PM

Looks to be a couple LG NP362P 220V 50Hz R407C Compressors

Cooling Capacity 50/60 Hz
Btu/hr : 21800/22000
Watts : 6388/6447

Motor Input
Watts : 2096/2135

Second to last on the page (http://www.lge.com/products/component/aircon/r_R407Cseries.jsp)

kayl

10-15-2007, 04:29 PM

nice work before, i see another killer cascade in the making ;)

4Qman

10-16-2007, 06:44 AM

A remarkable improvement on cosmetics to the 3 stager mate. Your enjoying these builds arnt you. hehe

n00b 0f l337

10-16-2007, 07:35 AM

Those are some massive compressors indeed.

before

10-16-2007, 08:49 AM

Thanks guys :)

Specifications of the unit.

1st stage
LG NP407P (23,400Btu/h; 40.7cc/rev)
1.9kW condenser + Fan
Schrader HSP
Wigam ML60/18C4FA/A8 gauge
Frigomec 1.6l reciever + Alco rotalock valve SR1-WDB
Copper filterdrier 50gr
Alco TXV TI-SW (w/ TIO-01)
Harle compact brazed plate HX B3-12A (12pl)
Schrader LSP
Wigam ML60/38C4FA/A8 gauge
R290 or R404a

2nd stage
LG NP362P (21,800Btu/h; 37.2cc/rev)
Desuperheater + Fan
ShineYear automatic oil separator
Schrader HSP
Wigam ML60/18C4FA/A8 gauge
Copper filterdrier 50gr
Honeywell CPEV AEL1
Cold_ice's Evap + succion line
2 * Schrader LSP
Wigam ML60/38C4FA/A8 gauge
R1150 or R1150/R50/R290 blended
(and of course something for safety)

Unseen

10-16-2007, 09:39 AM

nice start before :)

can you please post a pic from the Harle compact brazed plate HX B3-12A (12pl)?

thanks

before

10-17-2007, 10:31 AM

Thx ;)

Here's the HX. Dunno if flaring is a good option but I want to try it instead of brazing.

http://img98.imageshack.us/img98/543/45kbtuaggq2.jpg

Cascade as it looks today:

http://img98.imageshack.us/img98/9195/45kbtuabyg5.jpg

http://img98.imageshack.us/img98/999/45kbtuactv0.jpg

http://img98.imageshack.us/img98/9511/45kbtuadxf9.jpg

http://img98.imageshack.us/img98/1517/45kbtuaema3.jpg

http://img98.imageshack.us/img98/1379/45kbtuafrj1.jpg

4Qman

10-17-2007, 10:44 AM

Very good Before,. Nice size Desuperheater there man.

n00b 0f l337

10-17-2007, 12:00 PM

Looking good! Nice condensers!

gosmeyer

10-17-2007, 01:40 PM

We all know you will get the results your after.
Time to braze.

kayl

10-18-2007, 06:33 AM

thats going to a beast when its running. How come you didnt want to braze the plate HX? i personally like to have as many joins brazed.

TopherTony

10-18-2007, 06:39 AM

maybe because a brazed plate hx is kind of messy looking, where as a flare will keep it looking neat :shrug:

before

10-18-2007, 07:02 AM

Thank you guys :)

maybe because a brazed plate hx is kind of messy looking, where as a flare will keep it looking neat :shrug:

Right :D It will save some silver as well :p: BTW because of space constraints, it might be required to braze pipes... :cat:

In fact, space is difficult to use now; the unit is very compact. It more and more looks like a tower. :yepp:

ATM I'm hesitating about the way to connect the HX... As an Evaporator? Or a Condenser? Does it really matter? The one installed between 1st and 2nd stages of my 3 stager is connected as a condenser and it works fairly good. In fact, I think the HX is still an evaporator for the high stage and a condenser for the low one. BTW actual HX has 2 different sizes for the connections while the other having 4 equivalent connections...

Moc

10-18-2007, 07:26 AM

Connect it like its drawed at the second picture. "Refrigerant"= First Stage
"Water"= Second Stage.

TopherTony

10-18-2007, 08:07 AM

either way will work. i dont see a benefit from one over the other in the long run. Basically all you are doing is switching the sides?

Make sure that the low stage inlet is on the bottom because when it is evaporating the vapor has to rise. The highstage will be condensing so it's inlet will have to be on the top connection so when it condenses, the liquid will the flow downward. If you do it the opposite way, it wont work correctly.

n00b 0f l337

10-18-2007, 10:39 AM

Evap lower stage liquid in the bottom and then out the top, and then with gravity the gaseous upper stage goes from top to bottom and condenses :)

Clemmaster

10-18-2007, 11:05 AM

1st stage on the 2 big connector (inlet at the bottom, outlet at the top) and second one on the others (inlet a the top)

Moc

10-18-2007, 11:14 AM

I think enough people said that now :D ...

before

10-18-2007, 11:21 AM

@all: Thank you :toast:

@Clem: You're right... ;)

My question was a bit stupid as first stage refrigerant needs to go from bottom to top (liquid to gaz) while second stage refrigerant needing to go from top to bottom (gaz to liquid)... Additionaly, tighter connections are obviously to be used for high side pressure. Contrarily, larger connections are to be used for low side pressure. :)

Shame on me for not thinking before writing. :D

jinu117

10-18-2007, 11:32 AM

Nice going before :) What other cascades did you make? I am having not so easy time finding it :) Yup... I've been out of loop for too long :P
Looking forward to the monster result... 2hp eh? (cringe)

before

10-19-2007, 02:25 PM

Here's my 3 stager mate ;) A bit ugly but powerful... http://www.xtremesystems.org/forums/showthread.php?t=153348

Actual cascade has clearly a better looking and good power as well... not 2hp but about 6hp; and both compressors have about 40cc/rev displacement.

CPEV has been brazed to captube side and liquid line from HX is ready for brazing. :)

http://img263.imageshack.us/img263/37/45kbtuahyo4.jpg

http://img263.imageshack.us/img263/9558/45kbtuaimk9.jpg

http://img263.imageshack.us/img263/1254/45kbtuakjp7.jpg

http://img263.imageshack.us/img263/2128/45kbtualta6.jpg

piotres

10-19-2007, 03:07 PM

Looks for sure better than 3 stager ..way better :D .

Only condensor is bit "life tired" I think hehe :D .

Rotaries are ... monsterous :D .

What TXV + what nozzle You use ?

Waiting to see good temps mine friend :up: .

Regards
Peter

before

10-23-2007, 02:14 PM

Don't you like it painted? :D

TXV is a Alco TI-SW with a TIO-01

Today, I've prepared 1st stage succion line, and adjusted TXV outlet. Then I've brazed them to the HX along with 2nd stage liquid line side at the same time.

Guess I'll be able to finish the work tomorrow and start testing.

before

10-24-2007, 10:44 AM

Brazing work is finished. It remains leak testing, wiring and insulating. :)

http://img222.imageshack.us/img222/3412/45kbtuamtq9.jpg

http://img222.imageshack.us/img222/2527/45kbtuankx9.jpg

http://img148.imageshack.us/img148/1116/45kbtuaowf3.jpg

http://img148.imageshack.us/img148/3665/45kbtuapqh5.jpg

http://img148.imageshack.us/img148/6125/45kbtuaquc0.jpg

LukeXE

10-24-2007, 12:27 PM

Very nice :-)

n00b 0f l337

10-24-2007, 01:22 PM

1/2" Insulation? That all you've found you need?

before

10-25-2007, 09:11 AM

@Luke: Thx mate :)

@n00b: I get several different insulation materials. :)

Apparently there's no leak so I've started insulating. :) Did few tests with R290, and both stages look to work.

http://img80.imageshack.us/img80/7016/45kbtuaukm0.jpg

http://img80.imageshack.us/img80/8137/45kbtuarjy7.jpg

http://img80.imageshack.us/img80/8946/45kbtuasfq6.jpg

http://img80.imageshack.us/img80/8472/45kbtuatza8.jpg

http://img80.imageshack.us/img80/3190/45kbtuavhx2.jpg

http://img80.imageshack.us/img80/1519/45kbtuawik2.jpg

http://img80.imageshack.us/img80/1839/45kbtuaxxk0.jpg

http://img80.imageshack.us/img80/3904/45kbtuayji6.jpg

kayl

10-25-2007, 08:00 PM

very nice before, this has to be your cleanest unit yet mate, well done
When you build you don’t much around do you :toast2:

TopherTony

10-25-2007, 11:55 PM

that is AMAZING!! Really quite clean. Even the insulation is done expertly. Hats off to you :up:

jinu117

10-26-2007, 12:04 AM

Very clean indeed.

sacha35

10-26-2007, 12:56 AM

very nice work mate, cant wait to see some results of the loads this unit can hold and temps, all i can say is very clean workmanship, well done on a good job.

before

10-26-2007, 12:31 PM

Thank you so much guys :toast:

Insulation isn't finished yet... BTW I couldn't resist to test 1st stage a bit.

T1 = evap
T2 = suction

Difference between 2 temps is a bit high IMO; BTW TXV is to used with R404a instead of R290 and insulation is messy.

http://img98.imageshack.us/img98/1324/45kbtuazai2.jpg

http://img139.imageshack.us/img139/535/45kbtubajg0.jpg

Quick movie http://www.wideo.fr/video/iLyROoaftqXk.html...

before

11-02-2007, 11:26 AM

I've performed some tests with R290 into 1st stage and R1150 into the second one.

2nd stage went down to -112C unloaded with CPEV almost shut... Not really good ATM. :rolleyes:

BTW insulation is still in its early stages and thus it might explains why the temp is so "hot".

Anyway, dunno if the actual captube (2mm; 1.5m) is good or not to properly use the CPEV.

LittleDevil

11-02-2007, 11:42 AM

Really nice unit my friend :up:

What was first stage temps when you run secoond stage compressor?

Anyway, dunno if the actual captube (2mm; 1.5m) is good or not to properly use the CPEV.

It is but you will have some fun with CPEV, before you will set it.:)

Best Regards

TopherTony

11-02-2007, 06:08 PM

what are the low side pressures on the cpev?

before

11-05-2007, 03:51 PM

Really nice unit my friend :up:

What was first stage temps when you run secoond stage compressor?

It is but you will have some fun with CPEV, before you will set it.:)

Best Regards

Thanks buddy :toast:

First stage temps are very bad while 2nd stage has been running:

About -50C HX input to -40C output... very unstable.

Coldest temps so far were -67C HX inlet / -60C outlet unloaded. BTW the matter is, the TEV must be used with R404a and unfortunately, I've ran out of it. I only have some R290 ATM. I hardly need some R404a. :p:

what are the low side pressures on the cpev?

Lowest one so far was 0.6bar.

noobzed

11-06-2007, 09:37 AM

hé ben !!

ça me trou le cul ton savoir faire xav !!!

jinu117

11-06-2007, 10:59 AM

CPEV is nothing more than mechanical device that reacts to pressure. I don't see why it can't be used with other refrigerants. I am using one now on mini-c and have no issues with 4 different gases I tried on it with vastly different properties. I presume you are using it on first stage?

Clemmaster

11-06-2007, 11:11 AM

CPEV deals with pressures an viscosity. Both of them depend on the gas and the way the CPEV work will change

Moc

11-06-2007, 11:25 AM

I'm shure he wants to write TXV....

before

11-06-2007, 11:41 AM

hé ben !!

ça me trou le cul ton savoir faire xav !!!

Merci Seb :toast:

I'm shure he wants to write TXV....

:up: RIGHT! Corrected... :p:

before

11-07-2007, 03:25 AM

Wanna see how fast 2nd stage goes down? :D

http://www.wideo.fr/video/iLyROoaft1Dr.html

jinu117

11-07-2007, 04:06 AM

Heh, nice. Guess the load tuning for unit is quite good already :) (one thing I noticed about cascade 2nd stage, typically higher load handling machines pull down faster).

Clemmaster

11-07-2007, 04:11 AM

Off course

Jack

11-07-2007, 05:00 AM

Nice video!

Managed to fix the first stage already?

before

11-07-2007, 02:06 PM

Not yet ;) I've ordered 2kg of R404a to Kaeltetechnik-Shop (cold_ice's shop). Hopefully, this refrigerant will fix the matter.

before

11-08-2007, 07:38 AM

I'm performing the very first tests over a clocked CPU. Not too much ATM because I've picked up the wrong E6850 :D Nevermind.

Evaporating temp is -106.5C (0.86bar) during Spi32M at 500x9 @1.72v.

Not bad, but not good enough. CPEV is at its lowest available pressure. I'll wait for the R404a first, but it might be interesting to add some 0.9mm captude. :)

jinu117

11-08-2007, 08:18 AM

but it might be interesting to add some 0.9mm captude. :)

Uhmmm BEFORE or after? (I couldn't help it... :P)

before

11-08-2007, 08:23 AM

hehe :D

between actual 2mm captube and evap ;)

before

11-08-2007, 10:14 AM

It runs quite good :)

I got this E6850 up to 540x9 @1.72v (max FSB is lower than 550) and the temp didn't really move... in fact, it was a bit colder at the end thx to a lower ambient. :)

http://img221.imageshack.us/img221/6776/45kbtubbrk8.jpg

http://img221.imageshack.us/img221/695/45kbtubcdq0.jpg

http://img221.imageshack.us/img221/8595/e6850spi32m11m12672ns5.png

http://img221.imageshack.us/img221/4808/e6850spi32m10m47062bp3.png

http://img221.imageshack.us/img221/5236/e6850spi32m10m34875yj3.png

http://img221.imageshack.us/img221/1194/e6850spi32m10m24219ae3.png

I'm gonna move for a better chip in order to achieve higher loads. :)

4Qman

11-08-2007, 10:30 AM

great pics before. Look forward to a betetr chip under there man.

before

11-11-2007, 05:50 AM

Load is well held; evap pressure stays under 1bar. :)

http://img152.imageshack.us/img152/2571/e6850spi32m9m57843vk5.png

Marvin

11-12-2007, 05:43 PM

Congrats Xavier.
what are the dimension of the suction line ID and OD ?
and the SL insulation tube wall and ID ?
sorry for the questions ,but seem you dont have condensation.:D ;)

before

11-15-2007, 09:13 AM

I've switched to R404a and temps are now quite stables. BTW they are very very cold; I mean HX inlet temp is about -70C loaded!!! Less than 0.3bar... :eek:

I don't have exact HX outlet temp in mind, but delta between both is a bit high in my opinion.

Anyway, amount of refrigerant is good... I mean, adding more doesn't increase HSP but only static's.

IMHO, that's not good.

Additionnaly, I've added 3m of 0.9mm captube to the 1.5m of 2mm captube already installed between CPEV and evap in 2nd stage. Pressure has significantly decreased... from 0.6bar (-112C) with CPEV completely shut to 0.25bar (-124C) with CPEV completely open. :)

Taking speedfan as a temperature measurement, CPU is now clearly colder:
E6850 at 5100MHz @1.73v
Before: -92C idle / -75C SuperPI 32M
After: -106C idle / -90C SuperPI 32M !! (similar to my 3-stager temps with R1150 into 3rd stage)

BTW, I'll remove a bit of captube to properly use the CPEV... :D

Congrats Xavier.
what are the dimension of the suction line ID and OD ?
and the SL insulation tube wall and ID ?
sorry for the questions ,but seem you dont have condensation.:D ;)

Thanks Marvin :toast:

Succion lines are made of 14/16mm copper pipes to perfectly fit compressors succion connection.

What do you mean by "tube wall"? Insulation thickness? I think it's 13mm. ;)

gosmeyer

11-15-2007, 11:03 AM

Nice, Way to tweek it.

before

11-18-2007, 10:10 AM

Thank you ;)

I've removed 1.9m of 2nd stage 0.9mm captube.

Temp is now -109C with CPEV fully opened... :D Obviously, closing it decreases the temp.

http://img521.imageshack.us/img521/6686/45kbtubdgo2.jpg

before

01-12-2008, 06:14 AM

It has been a long time since I've last updated this thread...

So here are some results from what I did recently.

-118C unloaded

-112C Super PI 32M with QX9650 5.49GHz @1.90v

http://img146.imageshack.us/img146/2406/qx9650pi32m8m59079xt6.png

-107.5C 3DMark 2005 CPU tests with QX9650 5.46GHz @1.944v (OMG, these tests are strong! :p: )

http://img296.imageshack.us/img296/3802/qx96503dmark0532230fk7.png

So; as you can see, it allows some good results. :p:

BTW I still have a problem with flaring the oil return captube. It looks to leak a bit everytimes I unmount and then remount it. Will probably braze a simple captube here; but it pisses me off to have bought a special captube with flaring nuts and not using it. :)

Anyway; what you guys honestly think about these temperatures? Those are pretty cold, that's true, but can I expect less?

I'm not sure about the good functioning of the second stage CPEV... Maybe I'll remove it and braze a captube there.

before

04-17-2008, 04:24 AM

I've removed the CPEV from 2nd stage, and try to get a good amount of R1150 in order to achieve some decent temperatures. (CPEV is now used as a 1st stage expansion metric for my 3-stager)

First tries weren't very good cause without CPEV I've lost about 10C+, pressure for pressure, load for load.

So, I've though that it was time to remove the remaining captube which was used along with the CPEV (~2m of 2mm + ~2.9m of 0.9mm). Was thinking about 3.5 to 3.6m of 0.9mm as a replacement.

But today morning, before changing the captube, I've decided to go for a bit less of R1150... and I finally got pretty nice loaded temperatures... at about 5.6GHz using 1.97vCORE for Spi 32M, top/'hotter' part of the evaporator shown -103.5C with an evap pressure of 0.6bar which means -112C.

Well, that's nearly the same than it was with the CPEV installed, that's damn good considering the load.

Click the thumbnail to view full-size image
http://www.ixtremtek.com/images/DFIX48-T2R/QX9650SPI1M@9,234sa.png (http://www.ixtremtek.com/images/DFIX48-T2R/QX9650SPI1M@9,234s.png) http://www.ixtremtek.com/images/DFIX48-T2R/QX9650SPI32M@8m48,218sa.png (http://www.ixtremtek.com/images/DFIX48-T2R/QX9650SPI32M@8m48,218s.png)

gosmeyer

04-17-2008, 06:17 PM

I finally got pretty nice loaded temperatures... at about 5.6GHz using 1.97vCORE for Spi 32M, top/'hotter' part of the evaporator shown -103.5C with an evap pressure of 0.6bar which means -112C.

I think "pretty nice" is an understatement:up:

n00b 0f l337

04-17-2008, 06:33 PM

0.6 bar? As in above atmospheric? Shouldnt that be warmer then the BP at 1 atm no?

boshuter

04-17-2008, 07:53 PM

Awesome job before :up:

Nice to finally see a cascade tested with a real load :yepp:

before

04-18-2008, 12:29 AM

Thanks guys :toast:

0.6 bar? As in above atmospheric? Shouldnt that be warmer then the BP at 1 atm no?

Not sure if I've clrearly understood what you said. :(

Here's what I'm talking about.

http://img120.imageshack.us/img120/3559/saturatedvaluesr1150hq0.png

As for the observations, -112C evaporating temperature (0.6bar) to -103.5C evaporator top (K-type probe) is quite consistent. I mean, exit of the evaporator has to be hotter than evaporating temperature... obviously. :p: About 10C more is not that much for actual load IMHO, isn't it?

sacha35

04-18-2008, 12:33 AM

Nice results there before, now all you need is that golden 6Gig chip to put under this cooling, but even so the 5.6Gig you are getting is outstanding and it shows this unit holds good temps with 1.97 on the core when running SP, can you run a Wrime 1024 and show us some loaded temps please.

Well done mate outstanding.

Clemmaster

04-18-2008, 04:41 AM

About 10C more is not that much for actual load IMHO, isn't it?

No you don't have to worry about it, unless it has effect on the temperature of the base of the evap :D

Gautam

04-18-2008, 02:58 PM

5600 on a 2 stage for 32M! :eek:

before

04-24-2008, 11:37 AM

Thanks guys :toast:

I've decided to change the 2nd stage captube...yeah I know, I've to stop myself making mods everytime :D

In fact, taking into account the lenght of 0.9mm captube used by two XS builders for their cascades, I've performed a quick extrapolation to get a correspondance table for captube adjustment relativily to compressor power (rotary R407C compressor). Dunno if it makes sense or not...

BTW, I've brazed a piece of 3.8m. Here are the first results. :)

http://img236.imageshack.us/img236/8487/capi09ep2.jpg

Windows idle: -114.1C evap ; -62.4C HX in

http://www.ixtremtek.com/images/AsusCommando/-114,1Ca.jpg (http://www.ixtremtek.com/images/AsusCommando/-114,1C.jpg)

Loading Spi 32M at 5535MHz (582.6FSBx9.5) @1.82v: -108.2C evap ;-56.1C HX out; HP = 7bars

http://www.ixtremtek.com/images/AsusCommando/-108,2Ca.jpg (http://www.ixtremtek.com/images/AsusCommando/-108,2C.jpg)
http://www.ixtremtek.com/images/AsusCommando/7barsHPa.jpg (http://www.ixtremtek.com/images/AsusCommando/7barsHP.jpg)

LittleDevil

04-24-2008, 11:40 AM

Great :up: Can i ask you what is your room temp?

Regards

n00b 0f l337

04-24-2008, 11:40 AM

That really can't be good for the first stage compressor :(

before

04-24-2008, 12:39 PM

Great :up: Can i ask you what is your room temp?

Regards

Thanks my friend :toast:

Temp was about 18C to 20C I guess. (Outside temp was 24C and the cascade is next to the garage main door which was wide opened)

That really can't be good for the first stage compressor :(

Right. I've to adjust the amount of R1150 and then tune the first stage TXV to match the need. :)

before

04-25-2008, 12:53 AM

Adjusting R1150 amount, and retuning TXV.

Unloaded: -118.0C evap (-57.1C HX out)

http://www.ixtremtek.com/images/AsusCommando/-118Ca.jpg (http://www.ixtremtek.com/images/AsusCommando/-118C.jpg)

-118C ins't the coldest; but the pic I've taken. Guess -120C or so is highly probable with a bit more time. Ambient temp is 20C.

Also; I'm not looking for the absolute unloaded/unuseable coldest temp to take a pic, but for the right balance between 1st and 2nd stages.

sacha35

04-25-2008, 01:37 AM

Looking good before, is see you have posted up a chart for cap lengths, would this not change though on the amount of load required to sustain the given temperatures or was these calculations given on unloaded temperatures.

http://img236.imageshack.us/img236/8487/capi09ep2.jpg

before

04-25-2008, 02:41 AM

Thanks :toast:

Of course the lenght has to be adjusted upon the need. :) BTW I've checked the properties of 2 cascades that shown very good held of load (IIRC 250W+
@ about -107C). Obviously, unloaded temp and loaded one are highly correlated.

Also; this chart doesn't stand to be an 'end of all charts' you know (1st stage is so important as well even if the 1st compressor is also highly predictible knowing the 2nd one), but an approximate table gathering values one might expect to use with R1150 relativily to the 2nd stage compressor power. Assuming a linear relationship (which is pure guess), I would say the lenght is to be taken + or - 0.10m or something.

sacha35

04-25-2008, 12:53 PM

before

04-26-2008, 02:46 AM

Thanks so much :)

0.8mm doesn't look like to be suitable with 20kbtu/h+ compressors. At least that's what I guess... I've encountered a matter of very HSP with 0.8mm and the 25kbtu/h compressor used in my 3-stager 1st stage. Captube was 1.9m long, and formerly set for a 10kbtu/h. After moving for the 25kbtu/h beast, captube became a matter.

Under windows with today's tuning.

Idle : -117.8C evap (-60.3C HX out)

http://www.ixtremtek.com/images/AsusCommando/-117,8Ca.jpg (http://www.ixtremtek.com/images/AsusCommando/-117,8C.jpg)

Just for fun; final tuning won't be that cold. :)

Xeon th MG Pony

04-26-2008, 10:07 AM

flares are one shot, second you torque the bolt, if you unmount it you must remake the flare. Technicaly you can re-use a flare 2 more times but it should be avoided.

before

04-27-2008, 07:50 AM

Sorry buddy... why are you talking about flares? :) Wrong thread?

Xeon th MG Pony

04-27-2008, 10:04 AM

It has been a long time since I've last updated this thread...

BTW I still have a problem with flaring the oil return captube. It looks to leak a bit everytimes I unmount and then remount it. Will probably braze a simple captube here; but it pisses me off to have bought a special captube with flaring nuts and not using it. :)

Anyway; what you guys honestly think about these temperatures? Those are pretty cold, that's true, but can I expect less?

I'm not sure about the good functioning of the second stage CPEV... Maybe I'll remove it and braze a captube there.

Thats why I talked of flares ;)

before

04-27-2008, 11:10 AM

Oh ok... that was on January the 12th... I forgot :D

Thanks for your reply anyway :toast:

Xeon th MG Pony

04-27-2008, 01:42 PM

Ah, that is understandable lol.I just saw this thread at the top and thought it was realitively new.

before

05-12-2008, 02:12 AM

The old 1.9kW home-repaired condenser is leaking again... I've ordered a Luve 5.2kW one to be used as a replacement. Guess it'll fit much better.

DagoDuck

05-12-2008, 02:23 AM

LOL, that's a huge condensor, before. :D I guess from cold_ice? Looking forward to it!

piotres

05-12-2008, 02:37 AM

5.2 kw :eek: man You beat me with mine 3.6 kw :D

so what captube on 2nd stage are You using now ?

august123

05-12-2008, 03:27 AM

a big condesor isn`t always good, i made this experience in my huge cascade. you may have to switch one fan off (when possible) or control fan speed.

n00b 0f l337

05-12-2008, 03:36 AM

Just use a fan cut in, cut in at desired max pressure, cut out at a lower one.

before

05-12-2008, 10:12 AM

Yeah that's a big one; BTW you know, first stage compressor power is 2.4kW while second one is 2.1kW... :D

so what captube on 2nd stage are You using now ?

3.5m of 0.9mm... Guess it's a bit small for the capacity of this compressor; but too low pressures make the compressor to be very very hot.

before

05-19-2008, 11:02 AM

New condenser installed.

Tried it quickly and got -101C CPU socket temp during Spi 32M à 5.8GHz @1.81v... :D That's damn good. I'm gonna setup a Win XP to perform some 3D benchies.

http://www.ixtremtek.com/images/45KbtuBEa.jpg (http://www.ixtremtek.com/images/45KbtuBE.jpg)
http://www.ixtremtek.com/images/45KbtuBFa.jpg (http://www.ixtremtek.com/images/45KbtuBF.jpg)
http://www.ixtremtek.com/images/45KbtuBGa.jpg (http://www.ixtremtek.com/images/45KbtuBG.jpg)