3 stager build, part two.

[LukeXE]

First, I wanna ask mods to not delete/move that thread to "builder/customers relation forum", because it`s big project, making at all from 0, and any advices from other builders would be appreciated (in builder/customer forum nobody can`t write).

Ok, so I`m working on german 3 stage cascade. Originally project was done with some problems, for some months decompleted and I started it from beggining.



Here is the scheme (autocascading stage isn`t 100% true, because in real there is more hx). At this momment I can get it -85*C idle (not vacuum, about 0,1bar @ suction).

Compressor on #1 stage is Toshiba 3/4HP. I used captubes, exacly:

190cm of 0,8mm captube for R290
225cm of 0,8mm captube for R23 or CO2 or R170, depends on what I will have
240cm of 0,8mm captube for R1150.

Phase separators from MAPP gas bottles, for me the best.

Whole HX structure has now new, big, insulation box, but inside you can see that:




I used that autocascade from other customer build, which I had left in my workspace. It`s very strong and has good design, so why not use it.

Compressors on II and III stage will be around 3/4HP and 1HP. Rotary. I`ll use captubes, oil separators made by myself.

I stage is R290/R744/R1150 mixture, second will be pure R1150, third R14 with some methane and argon.

Everything is on very small, steel plate with wheels. Unit will have two dual cut-off switches, manometers.

If I`ll get photos, I`ll put them here as fast possible.

For now that`s all. Will show fast progress

Luke

[Xeon th MG Pony]

Luke how is it you get your hands on plate HXs and compressors but not the proper copper fittings? You need to work more on your fabricating, you do great technical work but now you need to move on to stream lining the fabrication side of things. This will improve your assembly speed and accuracy and ensure no leaks on the first go.

[yotomeczek]

Wow !
My old - never working cascade
And still some problems ...

[LukeXE]

From your cascade is only the first stage.

And needs to be tune. What problems ?

I see that that comments post only people who never did auto-c or even 3 stage.

[HawaiianSupermn]

So how cold will this beast be?

[LukeXE]

yeap, I know that I have problem with that.

But at all my "piping" skills will be improved in II and III stage, I works and I don`t wanna "unassemble" it. That work has more than 2 years and it`s leak free, so I`m happy with that.

So how cold will this beast be?

Would be nice to see -120-125*C loaded . Who cares about idle ? It looks cool and girls are screaming when see -150C lol.

[august123]

it seems like the compressors are much too small for an proper load >200W like new cpus on third stage.
but i look forward to see your captube results with R-14!

[LukeXE]

If need, there shouldn`t be problem with changing compressors for bigger ones.

[MaSell]

What is the point in building this unit? Novadays cpus are much "higher" coldbugged than C2Ds. I heared about -60'c/-70'c ones!

[LukeXE]

always is possibility to insulate evap-cpu space with something, to increase cpu temperature. Order was for 3 stager and 3 stager will be done. Who know what future will bring.

[MaSell]

always is possibility to insulate evap-cpu space with something, to increase cpu temperature. Order was for 3 stager and 3 stager will be done. Who know what future will bring.

It's bad solution, I was fighting against CB for a veeery long time and checked that "trick" very well. In idle temp will be pretty low, but in load - too hot. Belive me

Near future will bring coldbugs, look at all cpus from last 5 years and draw conclusions.

[LukeXE]

So what do you suggest ?

Maybe some kind of valve with hot gas supplying evap. Let`s say, something like cpev, but by using captube and valve to control evap temperature,

[MaSell]

I'm not builder, so I can only suggest to build -80'C 350W unit but...

... if customer want to play with nehalem plus this 3stager

[[XC] gomeler]

Just build in a hot-gas bypass to counter the cold-bug and cold-boot issues. Nehalem seems to work around -115C to -95C on average from what I've read around here. Of course there are always chips that'll run much warmer, I used a QX9650 that coldbugged at -88C :shrugs: Have you tested that 1st stage for how much of a load it can handle? Would be a shame if it crashed when the 2nd stage was loaded by the 3rd stage. Do you stuff those MAPP cylinders or just depend on their sheer volume and velocity reduction?

[sdumper]

Just build in a hot-gas bypass to counter the cold-bug and cold-boot issues. Nehalem seems to work around -115C to -95C on average from what I've read around here. Of course there are always chips that'll run much warmer, I used a QX9650 that coldbugged at -88C :shrugs: Have you tested that 1st stage for how much of a load it can handle? Would be a shame if it crashed when the 2nd stage was loaded by the 3rd stage. Do you stuff those MAPP cylinders or just depend on their sheer volume and velocity reduction?

And yours did better than mine as I recall I couldn't even boot at colder than -68c....

[[XC] gomeler]

months ago I tested that I stage and without big calibration it holds -50 @ 400W load (If I remember correctly)

Impressive! Curious though, wouldn't it have been easier to do an R600/R170, R600/R23 or R600/R290/R744 autocascade and avoid that R1150 loop or are you simply adapting that "autocascade" as the first stage? If I were aiming at just condensing R1150 in the 2nd stage I'd say R600/R170 or R600/R23 would work like a charm.

And yours did better than mine as I recall I couldn't even boot at colder than -68c....

well that was gautam's chip that I was describing above. All my chips have had CB around -110C to -120C and CBB around -95 to -105C

[LukeXE]

Curious though, wouldn't it have been easier to do an R600/R170, R600/R23 or R600/R290/R744 autocascade and avoid that R1150 loop or are you simply adapting that "autocascade" as the first stage?

Second option. I just got that "stage" done and wanna adapte it to that project. If it won`t work, I`ll make normal I stage.

About MAPP bottles. They just work excellent, separation of refrigerants is very good. don`t know why and I don`t care

[LukeXE]

months ago I tested that I stage and without big calibration it holds -50 @ 400W load (If I remember correctly)

[MaSell]

If I`ll get photos, I`ll put them here as fast possible.

No offence Luke!!!! ...but I just wanna ask: Why you cannot show us some pics? You should have camera from pete: http://www.xtremesystems.org/forums/...&postcount=297

[LukeXE]

No offence Luke!!!! ...but I just wanna ask: Why you cannot show us some pics? You should have camera from pete: http://www.xtremesystems.org/forums/...&postcount=297

I don`t have that camera. Pete never sent it to me.

teyber, yeap, that photos are outdated, but I wanted to show how I stage looks.

I`ll show new picks on weekend, if possible.



If someone has any interest to me, please write a PM to me.

ok, went down to the workshop and made few photos by brothers phone, needa find usb cabble and I`ll upload photos.

ok, here you have (photo is really bad...)



unit is uninsulated, just for testing. Clear photos on weekend, with sub ~ -100C stage II

[Movieman]

Gentlemen;
I removed two posts from this thread.
One because it was trolling and I've PM'd the member NOT to post in this thread and the other just to cleanup the thread.
Keep it civil please or I'll be sending people on vacations to take some time to think about their attitudes here.
Thanks for reading.

[ryba]

Ok, I understand your point.

I will have digicam in couple of days, depends on postal (tomorrow it will be send). So then I`ll make clear pictures.

I`m building this unit, not from old parts, I`m doing it from parts bought to your unit for your money. Everything, compressors, condensers, evap, heat exchangers, two way cut-off switches etc. I never spent your money for anything else.

I`m going now to shop for some electric stuff to get the electric done (fuses etc) and I`ll borrow digicam to give you 100% proof that it`s your unit and it will be done as it should be. I`ll make paper with todays date.

From 1st thread... you wrote/show us photos LG compressors for 1st and 2nd stage.

But now what you using in this cascade?

Compressor on #1 stage is Toshiba 3/4HP. I used captubes, exacly:

190cm of 0,8mm captube for R290
225cm of 0,8mm captube for R23 or CO2 or R170, depends on what I will have
240cm of 0,8mm captube for R1150.

And what we you used in Yoto cascade?

Compressors -- Toshiba 3/4HP for I stage

I stage:

190cm of 0,8mm captube for R290
225cm of 0,8mm captube for R23 or CO2 or R170, depends on what I will have
240cm of 0,8mm captube for R1150.

- topic.


I know that I'm not your client and I'm happy with that! You are making bull from trust others ppl.

I'm phase change builder too and I have some units on my account. Few notes from me: this project is big mistake from beggining. You never finish this cascade. B'couse how you want finish it, when you don't have R14?

You can lie ppl here and they trust you... I don't know why but they trust everybody.

[LukeXE]

Can you read first post, that I noticed, that I used 1st stage from my another project ? What is wrong with quote`n specs of that stage from build for which it was done ?From the beggining of that topic I`m talking about 1st which I had left. And don`t be so sure about R14

I used that autocascade from other customer build, which I had left in my workspace. It`s very strong and has good design, so why not use it.

[teyber]

I don`t have that camera. Pete never sent it to me.

teyber, yeap, that photos are outdated, but I wanted to show how I stage looks.

I`ll show new picks on weekend, if possible.



If someone has any interest to me, please write a PM to me.

ok, went down to the workshop and made few photos by brothers phone, needa find usb cabble and I`ll upload photos.

ok, here you have (photo is really bad...)



unit is uninsulated, just for testing. Clear photos on weekend, with sub ~ -100C stage II

Awsome nice

[teyber]

no offense here luke, but arn't these the same pics you posted weeks/months ago?