The Storks...

[before]

Possibly my last unit. Unit to end all units; the holistic unit; the value of the whole will be greater than the sum of its parts. :)

Most parts have already been used, that's why some of them look a bit ugly.

I'm gonna keep this thread updated with further progress.

http://img38.imageshack.us/img38/9951/img8509.jpg

http://img23.imageshack.us/img23/9383/img8546.jpg

http://img23.imageshack.us/img23/8824/img8552x.jpg

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http://img14.imageshack.us/img14/3641/img8738q.jpg

http://img171.imageshack.us/img171/4686/img8745j.jpg

http://img43.imageshack.us/img43/3669/img8752c.jpg

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http://img21.imageshack.us/img21/9108/img8774x.jpg

http://img87.imageshack.us/img87/3186/img8779h.jpg

[bartx]

Looks really nice :cool:

[Buckeye]

As allways incredable stuff "Before" :up:

It looks like its going to be a monster, any idea on what temps you will be shooting for ?

[Asylum1]

Looks like its coming along good.

[Expat GriZ]

Formidable!! Fantastique!! Can't wait to see this one finished. Like Buckeye said..should be a monster & sought after temps??

[before]

Thx guys. :)

It's gonna be quite an uncommon unit, with each stage being usable as a cpu cooler independently to the lower one(s). About 4th stage evap temp, I'd be happy with about -145C loaded (R50 @ ~ 3.3bars). Anyway, what matters isn't the lowest stage evap temp but the polyvalency of the unit as a whole.

[Foamy]

Thx guys. :)

It's gonna be quite an uncommon unit, with each stage being usable as a cpu cooler independently to the lower one(s). About 4th stage evap temp, I'd be happy with about -145C loaded (R50 @ ~ 3.3bars). Anyway, what matters isn't the lowest stage evap temp but the polyvalency of the unit as a whole.

Could you explain?:D

[[XC] gomeler]

I believe each stage will have it's own evaporator/suction-line so he can use the stage he wants to hit the evap temps he desires. Only need -70C? Fire up just the first two stages. Need -140C? Fire up all four stages.

[Buckeye]

gomeler;4020717']I believe each stage will have it's own evaporator/suction-line so he can use the stage he wants to hit the evap temps he desires. Only need -70C? Fire up just the first two stages. Need -140C? Fire up all four stages.

That would be so cool to have a Cascade like that, it that even possible ?

[[XC] gomeler]

That would be so cool to have a Cascade like that, it that even possible ?

Yes, with multiple evaporators and solenoids to direct refrigerant flow. I believe this is what Before is aiming for. You could also use a single evaporator but you would need a bunch of valves to direct inlet/outlet to the corresponding operating stage and would have to make sure the system vacuumed the evaporator empty after each run so as to not cross-contaminate the various stages. Multiple evaporators is simpler :D

[gosmeyer]

Xavier,
Nice and clean as always, It's a great learning experience to watch your builds !

[koda]

Excellent !
Can't wait to see "this beast" in action, my friend ;)

[before]

Thanks guys :)

Eric; How are you mate? :toast:

Well Gomeler; you got it dude. Multiple evap is way easier i guess.

[gosmeyer]

I'm good brother- A 5.2 hit on a 920, Your MAD!

[tiborrr]

Excellent build before! Awaiting progress pictures! :up:

[piotres]

That's going to be BIG and COLD thing :up:.

[K404]

I have a vague image in my head of how a 4-headed unit is gonna look and how it will be used.


"Hmmmmm..... what temp do I want today...eeny......meeny....miney...mo" :D

What kind of weight is the unit so far, Xavier? :)

[Oliver]

spechless , that is an outstanding build your started on ...

totally the BOMB phase unit

keep building it

[sdumper]

Wow that is a really cool idea!!! this will be so versatile!!!!

[kayl]

very nice work before :clap:

[before]

Thanks guys.

A bit more. :)

http://img89.imageshack.us/img89/3143/img8785o.jpg

http://img338.imageshack.us/img338/2803/img8796z.jpg

http://img89.imageshack.us/img89/7103/img8798h.jpg

http://img89.imageshack.us/img89/301/img8800.jpg

http://img28.imageshack.us/img28/664/img8807.jpg

http://img246.imageshack.us/img246/6144/img8808e.jpg

http://img515.imageshack.us/img515/9131/img8812h.jpg

http://img246.imageshack.us/img246/82/img8813l.jpg

[sdumper]

Very clean work!!!!

[Dualist]

Love that..!! :clap:

[bazx]

2x levels and wheels

makes life so much easier

this unit makes alot of sence to me

[before]

Thanks guys :toast:

[before]

A bit more.

http://img260.imageshack.us/img260/7349/img8821.jpg

http://img202.imageshack.us/img202/8708/img8826.jpg

http://img202.imageshack.us/img202/8981/img8832.jpg

http://img383.imageshack.us/img383/5441/img8836.jpg

http://img245.imageshack.us/img245/7963/img8842y.jpg

http://img410.imageshack.us/img410/2170/img8845i.jpg

[koda]

Wow ... need to arrange a meeting to see this beast in real :D

Great work Xav' ... keep your spirit !

[sdumper]

How are you going to braze those joints without burning the wood?

[[XC] gomeler]

How are you going to braze those joints without burning the wood?

Use a heatshield. A few layers of thin sheet metal works well.

[sdumper]

Never seems to work cleanly for me but hey thats where paint comes in handy.

[before]

Won't be a matter for the joints; but for the HX connections. :)

@Eric: Yeah! It would be a great pleasure.

[before]

I've worked a bit on suc sides from the HX today.

http://img514.imageshack.us/img514/7159/img8847.jpg

http://img194.imageshack.us/img194/3528/img8848o.jpg

http://img514.imageshack.us/img514/4044/img8851j.jpg

[Foamy]

imagine yourself, cpu shopping with that car :D

- sir i wanne buy an amd 1600 duron but i would like to test it first with erhm...this..:bananal:

* ....

[hiwa]

WoW before back and wanna make another monster ? :D
where is Bertha man? ah now i understand you see I9 Coldbug

[tiborrr]

Awaiting further progress, Xavier. Simply brilliant. Work love to see some piping diagram though :)

Best Regards,
Niko :up:

[august123]

did you calculate any cooling power of the stages? Interesting compressor choice...

[[XC] gomeler]

The more I think about it the more I think I want to borrow your design :)

[-EC-UnRockStar]

About 4th stage evap temp, I'd be happy with about -145C loaded (R50 @ ~ 3.3bars).

forgot it :ROTF:

The compressors are to Small !:shakes:

[n00b 0f l337]

Don't always have to go so huge, having shorter jumps helps quite a bit.
The NCE 3 stager was 1.125hp/.75hp/.75hp and held -125C on quads. Methane's not so easy though I've heard, might want to consider r402a/r170/r1150/r14 and add some argon or try it striaghtr.

[chispy]

Hi Xavier long time no see bro , great unit you are building , man this is going to be bigger then your Big Bertha :yepp: , you have some great skills man :up:. Take care m8.


regards: Chispy.

[before]

Thanks guys! :)


WoW before back and wanna make another monster ? :D
where is Bertha man? ah now i understand you see I9 Coldbug

Both Berthas are here... dismounted, reused... :p:


forgot it :ROTF:

The compressors are to Small !:shakes:

Sarcastic? Any positive jump into the thread dude? Don't really get you there.

Of course, perhaps you're right. Will see. :)


Don't always have to go so huge, having shorter jumps helps quite a bit. The NCE 3 stager was 1.125hp/.75hp/.75hp and held -125C on quads.

So right... :yepp:


Methane's not so easy though I've heard, might want to consider r402a/r170/r1150/r14 and add some argon or try it striaghtr.

Yeah; methane might be a problem. Anyway, I've already used it as a third stage refrigerant (down to about -140C IIRC loaded; this was ages ago) with a 32cc/rev, 18kbtu cp there and it worked. It obviously required toooooo much HSP. So I hope it to be alright. Will see. :)

[MeltedDuron]

Amazing Xavier, i love the fatc your kinda finishing up on the game but going all out on it and sharing it with us.

[gosmeyer]

Limb or no limb, I'm going out on it and say -145 loaded is on the way :D put it in the book :up:

[hiwa]

so we will wait for some fully cascade running eh?
I9 + 2 X 5870 :D


waiting for update man, wanna see final result with this monster

[before]

I'm back from NYC and I've started working on the box for the liquid receivers today. It remains to find a good solution for insulating the solenoid valves. :)

[MeltedDuron]

I'm back from NYC and I've started working on the box for the liquid receivers today. It remains to find a good solution for insulating the solenoid valves. :)

Good trip, where is the XS post card!!! How about a Bazx styles MDF box full of armaflex sheet? Neat and well insualted

[teyber]

veery nice!

i don't think i would be able to braze those hand valves :( those valves are hard to get hot enough to braze without getting the valve too hot and you have the wood there to burn... that would be hard for me!

unit looks great piping looks even better

[MeltedDuron]

You unscrew the bolt, remove the hand valve then use a big spanner to remove the valve internals then you can braze it! Well what my Danfoss one says

[before]

Well, I've been doing couple of stuff since last update.

http://img2.imageshack.us/img2/3986/img9018b.jpg

http://img689.imageshack.us/img689/2356/img9022b.jpg

http://img148.imageshack.us/img148/6161/img9023b.jpg

http://img503.imageshack.us/img503/4458/img9025b.jpg

http://img503.imageshack.us/img503/1315/img9028b.jpg

http://img405.imageshack.us/img405/2486/img9031b.jpg

[sdumper]

Great work!!!!

[before]

Thanks dude ;)

http://img255.imageshack.us/img255/2450/img9034.jpg

http://img20.imageshack.us/img20/8341/img9035k.jpg

http://img20.imageshack.us/img20/7691/img9043b.jpg

http://img682.imageshack.us/img682/8013/img9048h.jpg

http://img691.imageshack.us/img691/1545/img9050.jpg

http://img691.imageshack.us/img691/1654/img9051o.jpg

[n00b 0f l337]

Looking great Xavier, I hope it performs as well as you hope. Looks like a clean job in tapping those TXV and repressurizing.

[TheKarmakazi]

Been waiting to see this finished ever since you first posted it at i4. Awesome build concept, and clean execution. Im excited to see your final loaded temps! :up:

[sdumper]

Thanks dude ;)

http://img255.imageshack.us/img255/2450/img9034.jpg

[/IMG]

Xavier, is that second HX being fed r1150 and if so what model TXV is that?

[Patrickclouds]

don´t you think that the dimensioning of the whole unit is completly wrong?

has the condenser enough power?
the compressors are undersized
copper pipes are too small
plate hx are undersized
are you using phosphor brazing rods for temperatures below -100°C? no silver?
you have only one electronic supply line for all components?
your bourdon manometers will get killed ;)
i hope you have enough hp cut off switches

[sdumper]

don´t you think that the dimensioning of the whole unit is completly wrong?


the compressors are undersized
copper pipes are too small
plate hx are undersized



I think you are mistaken my friend....

[Patrickclouds]

@ sdumper
i think he uses alco txv

13ccm for 3rd stage is really to small ;) i would use this in a 2 stager with r23 but not in such a big unit ;)

16ccm in 2nd, 13ccm in 3rd und then 16ccm in fourth? make a calculation to see how many cooling capacity you´ll need when we have 250 to 300 watt on the evap of the 4th stage

[sdumper]

@ sdumper
i think he uses alco txv



cool thanks!!!

[before]

don´t you think that the dimensioning of the whole unit is completly wrong?

Hopefully not.


has the condenser enough power?

Looks alright to me.


the compressors are undersized

Well, I had bigger cp in my other units... time has come to try with less power.


copper pipes are too small

Don't get you...


plate hx are undersized

Will see...


are you using phosphor brazing rods for temperatures below -100°C? no silver?

Depends on the parts to braze; but basically it has nothing to do with temperature dude. I've always done it this way; and never got a matter of this kind. Maybe you don't know that this unit is not my first one for real CPU cooling within temperatures range way below -100C :rofl:


your bourdon manometers will get killed ;)

Come on dude, these are reused ones... still alive :rolleyes:


i hope you have enough hp cut off switches

Thanks for your optimism; greatly appreciated! :up:

Nevermind; I could be wrong with the specs. Will see. :)

[Patrickclouds]

i don´t like sarcasm. it´s only a bit help for you to get a working unit. you don´t have to follow anybodys thoughts. it´s up to you.

condenser:
with how much condesing power did you calculate? i think there is no calculation for the whole unit ;) discription follows in this and the last post you quoted above.

compressor:
you need enough compresor power to achieve a temperature at the present load on your evap. i calculated this and come to the conclusion that your compressors are to weak. please post your calculation. which temperatures did you choose? refrigerant, t0, tc, tsh, tsc, lambda (efficiency factor)

copper pipes:
i mean the inner diameter is to small to have for e.g enough massflow for 3kw @ -35°C in your first stage. that depends on your piping and those little compressors.

hx:
see copper pipes. and not enough area for heat transfer.

brazing rods:
there are specifications. and they say you should use silver rods when temperature goes below -40°C.
so specs are specs and that has nothing to do what you did in previous units :D
this has not only to do with the material you are brazing ;) both is important temperature and material.

manometer:
inform you how bourdon manometers work ;)
if bourdon manometers are overwind to much they get killed.

so please post your calculation of every stage.

[sdumper]

i don´t like sarcasm. it´s only a bit help for you to get a working unit. you don´t have to follow anybodys thoughts. it´s up to you.

condenser:
with how much condesing power did you calculate? i think there is no calculation for the whole unit ;) discription follows in this and the last post you quoted above.

compressor:
you need enough compresor power to achieve a temperature at the present load on your evap. i calculated this and come to the conclusion that your compressors are to weak. please post your calculation. which temperatures did you choose? refrigerant, t0, tc, tsh, tsc, lambda (efficiency factor)

copper pipes:
i mean the inner diameter is to small to have for e.g enough massflow for 3kw @ -35°C in your first stage. that depends on your piping and those little compressors.

hx:
see copper pipes. and not enough area for heat transfer.

brazing rods:
there are specifications. and they say you should use silver rods when temperature goes below -40°C.
so specs are specs and that has nothing to do what you did in previous units :D
this has not only to do with the material you are brazing ;) both is important temperature and material.

manometer:
inform you how bourdon manometers work ;)
if bourdon manometers are overwind to much they get killed.

so please post your calculation of every stage.


Patrick with all due respect can you post your formulas so we can all see how you came up with your calculations and learn from it?

[[XC] gomeler]

Patrick with all due respect can you post your formulas so we can all see how you came up with your calculations and learn from it?

Agreed, I'd like to see what exactly you are talking about :)

[Patrickclouds]

it´s a lot of work to do calculation on paper. so i use coolpack / refigeration utilities. but with that tool the condesing capacity is too low, because it calculates without the compressor heat that comes into the circuit. if you summate the condensing capacity with the power input that shows ref util with the default parameters (isotropic efficienzy =1) you have a good value for condensing capacity of the stage.
but in my opinion those values of evaporating capacity that shows us this tool in the first stage is too less or do you think there will only be 1,328kw necessary to hold the heat of the stages below?
if you want exact values you have to find the right isentropic efficiency (0 to 1) for every stage. you can calculate with 0,75 in the first stage and 0,50 in the 2nd, 3rd and 4th stage.then you will see that the condensing capacity will become higher.

my lambda is from a 5 stage calculation on http://www.extremecooling.de/forum/kaskaden/890-5tage-270-w-200-a-c-planung-teil2-zwischenstand.html
this value is the efficieny of our compressor because of clearance volume.
we know that rotarys are more efficient than full hermetic compressors like danfoss nl11.

before uses the following compressors:
1st stage 33ccm 0,000033x2900x60=5,742m³/h displacement
2nd stage 16,7ccm 0,0000167x2900x60=2,9058m³/h displacement
3rd stage 13,4ccm 0,0000134x2900x60=2,3316m³/h displacement
4th stage 16,5ccm 0,0000165x2900x60=2,871m³/h displacement

i would say we choose 250 watts on the last stage with r50 (methane):
4th stage:
http://members.extremecooling.de/patrickclouds/index.php?cmd=image&sfpg=VGhlIFN0b3JrcyBDYWxjdWxhdGlvbi8qcjUwIGxvZ3BoL nBuZyphYjBiMmQ1OWEwN2UxYzA1MGM0OGY1NGVmNGUwMmVmNA
http://members.extremecooling.de/patrickclouds/index.php?cmd=image&sfpg=VGhlIFN0b3JrcyBDYWxjdWxhdGlvbi8qcjUwIGN5Y2xlI GluZm8ucG5nKjVkMzU5YWRmYTc1OWIyOTMxMjRhZDBlYzUxZjI 2NWZk

ok now we need Qe (evaporating capacity in the 3rd stage): 0,347+0,097=0,444kw
3rd stage:
http://members.extremecooling.de/patrickclouds/index.php?cmd=image&sfpg=VGhlIFN0b3JrcyBDYWxjdWxhdGlvbi8qcjE0IGxvZ3BoL nBuZyo2ZDMxZjhiZGE1ZWZkZWExMmNhNDg0YzRhOWE4M2I0ZQ
http://members.extremecooling.de/patrickclouds/index.php?cmd=image&sfpg=VGhlIFN0b3JrcyBDYWxjdWxhdGlvbi8qcjE0IGN5Y2xlI GluZm8ucG5nKmRjZTg3NmU4OTFiNzVkYTU2MTc4ZTVmMDg4YmY 0OTUz

evaporating capacity in the 2nd stage: 0,575+0,131=0,706kw
2nd stage:
http://members.extremecooling.de/patrickclouds/index.php?cmd=image&sfpg=VGhlIFN0b3JrcyBDYWxjdWxhdGlvbi8qcjExNTAgbG9nc GgucG5nKjUwYzY3Y2JhZTBkNTFiODBiYjI1ZGMwNWYxMDM3MzQ 2
http://members.extremecooling.de/patrickclouds/index.php?cmd=image&sfpg=VGhlIFN0b3JrcyBDYWxjdWxhdGlvbi8qcjExNTAgY3ljb GUgaW5mby5wbmcqYzQ5MTg0YjMyNGQ0ZTEyMzcwNzg3ODVjMWQ wNTA1M2Y

evaporating capacity in the 1st stage: 1,017+0,311=1,328kw
1st stage:
http://members.extremecooling.de/patrickclouds/index.php?cmd=image&sfpg=VGhlIFN0b3JrcyBDYWxjdWxhdGlvbi8qcjUwNyBsb2dwa C5wbmcqOWEwZjAzOWUzZjIyN2RlMTY2YTc0NzE5NmYyNjNhYTY
http://members.extremecooling.de/patrickclouds/index.php?cmd=image&sfpg=VGhlIFN0b3JrcyBDYWxjdWxhdGlvbi8qcjUwNyBjeWNsZ SBpbmZvLnBuZyoxNmM0NDJhMmFlMWQ3YjgxNzVkOTMwNDNhZWJ hOTIxNQ

condensing capacity in the first stage are 2,732kw. but this is theory. i think the values in real are not so good.

now we come to the diameter of the copper pipes. i have no calculation for this. i take a look in the datasheets of compressor manufactors. and for compressor with a displacement of 10m³/h danfoss (maneurop) says 16mm suction line and 12mm discharge.

take a look to this datasheet: http://www.elektronika-sa.com.pl/tcmodel.php?line=HCPSM-LTZ-2004&model=LTZ28&LID=2
there you see that you need in the 1st stage a bigger compressor than coolpack / ref util has chosen. this one has 11,81m³/h displacement. so in my opinion you should use a larger dimensioning than coolpack told us becaus danfoss find out their capcity values by testing and not calculating ;)

[sdumper]

Thanks Patrick thats a very cool utility.

How do you know what to enter for volumetric efficency? I love this tool it is very cool but the manual is lacking for me anyway...

[Patrickclouds]

watt and celsius are two different parameters. watt is the rated power und celsious is a temperature
i don´t get what you want to do.
http://en.wikipedia.org/wiki/Watt
did you mean °C in °F?

[sdumper]

watt and celsius are two different parameters. watt is the rated power und celsious is a temperature
i don´t get what you want to do.
http://en.wikipedia.org/wiki/Watt
did you mean °C in °F?

Nope I was on the wrong screen where one of the parameters was heat in celcius and I was curious how to convert watts to celcius but its not important. How do I know what to enter for Volumetric Efficiency -- n_vol?

[Patrickclouds]

How do I know what to enter for Volumetric Efficiency -- n_vol?

the efficiency depends on two parameters:
ni: indicated efficiency. this parameter can only be found out in experiments. so ask the compressor manufactors :D
nm: mechanical efficiency
n_vol= ni x nm
those parameters vary with the type of the compressor (fullhermetic, rotary, scroll,.....)
i have no idea how to calculate back the efficiency form datasheets of the manufactors

the efficiency of motors is very colplex. maybe you can use google to find some more informations

[sdumper]

the efficiency depends on two parameters:
ni: indicated efficiency. this parameter can only be found out in experiments. so ask the compressor manufactors :D
nm: mechanical efficiency
n_vol= ni x nm
those parameters vary with the type of the compressor (fullhermetic, rotary, scroll,.....)
i have no idea how to calculate back the efficiency form datasheets of the manufactors

the efficiency of motors is very colplex. maybe you can use google to find some more informations


Cool thanks :up:

[before]

so specs are specs and that has nothing to do what you did in previous units :D

I'm really honored that you know me so well. :)

For those interested in coolpack; this proggie isn't a secret, very useful for refrigerant specs. http://www.et.web.mek.dtu.dk/Coolpack/UK/index.html

Tuning has started.

- 1st stage = HSP @ ~ 10bars & TEV @ -67C :cat:

http://img268.imageshack.us/img268/8578/img9085d.jpg

- 2nd stage = HSP @ ~ 10.5bars & modded TEV (R1150) @ -111C

http://img683.imageshack.us/img683/9606/img9086.jpg

- 3rd stage = HSP @ ~ 7bars & CPEV (wide open) @ -112C

http://img51.imageshack.us/img51/8414/img9087.jpg

Just for fun of course. 1st stage is too cold this way. :rolleyes: Anyway, I'm very surprised how well it actually holds the load of the running lower stages even with such a pressure.

With the CPEV opened like this, the 3rd stage pulls down amazingly fast!!

http://img191.imageshack.us/img191/5452/img9081.jpg

Unfortunately, I won't be able to grab the R50 soon.

[sdumper]

Very nice work as always :)

[before]

Thx.

Looks to be the min possible for the 3rd stage CPU evaporator. A bit more of insulation will obviously help to reach -130C :)

First stage TXV = -57C to -60C (I'm gonna tune the superheat a bit more here)
Second stage TXV = -107C to -108C

http://img515.imageshack.us/img515/9710/img9110c.jpg

[august123]

with that high vacuum, a tev, your tiny compressors, -67C on first stage while 3rd is running? seems to be impossible for me

[Ozzfest05]

Can you list the current gases in all stages please.

[before]

with that high vacuum, a tev, your tiny compressors, -67C on first stage while 3rd is running? seems to be impossible for me

I never thought it to be possible as well but this is how it was. :) Anyway, compressors aren't so 'tiny'...
Even -57C doesn't seem appropriate to me.


Can you list the current gases in all stages please.

R507, R1150, R14 :)

[Ozzfest05]

I never thought it to be possible as well but this is how it was. :) Anyway, compressors aren't so 'tiny'...
Even -57C doesn't seem appropriate to me.



R507, R1150, R14 :)

I have seen R507 get to -60c before but it was on an unloaded slightly undercharged system with too long a cap tube length, something seems off,-60c area under load seems strangely cold, that ethylene should be putting a fair share of load on the first stage, no?

[before]

Just for fun of course.

:)

It wasn't an appropiate temp; just a shot for fun. -67C corresponds to about .3bar which is definitely not what is needed. This was a cut-off.

Also, the 3rd stage was only charged for the wide open CPEV.

Actually, I would be happy with something like -45C there with the finished setup. I guess that I'm gonna have to play with the second TXV superheat; I've probably insulated it too quickly.

[Ozzfest05]

:)

It wasn't an appropiate temp; just a shot for fun. -67C corresponds to about .3bar which is definitely not what is needed. This was a cut-off.

Also, the 3rd stage was only charged for the wide open CPEV.

Actually, I would be happy with something like -45C there with the finished setup.

Ok I understand so when are you charging the last stage???

[before]

Well, unfortunately I won't have the time to fetch the R50 in the near future. Maybe that I'll try with R14 there... not sure if it'll be interesting btw; 3rd stage is gonna be way too cold for a low stage full of R14. Only if I can't wait lol

[Ozzfest05]

So what would you do R507 R1150 R1150 R14?

[before]

No it's gonna be the same matter with R1150. :)

Perhaps R507, R23, R1150 and R14.

[before]

I've played a bit with superheats to get these. (3 stages running)

1st TEV @ -55.2C

http://img13.imageshack.us/img13/5862/img9124m.jpg

2nd TEV @ -101.5C

http://img705.imageshack.us/img705/6638/img9127.jpg

3rd stage CPEV @ -130.7C (crap pic sorry)

http://img697.imageshack.us/img697/8880/img9145.jpg

[sdumper]

Very nice job as always...i really like those compressors so far :)

[sofos1990]

wow -130C on load !!!!
That's a monster:D

[before]

Very nice job as always...i really like those compressors so far :)

Thx. Well, IIRC yours was built with even smaller rotaries, right? And it outperformed mine as a 3-stager... No need to be obsessed with beast compressors. :)

Actually, I'm doing pretty much the same this time than with my former 3-stager which was 1.5x time more powerful. :p: Dunno why; perhaps that's because of the CPEV.

Which were the refrigerants used for your 3-stager? I'm hesitating to use R23 into the second stage.


wow -130C on load !!!!
That's a monster:D

Thx. This is not under load btw. I wished to use it for benching but I missed the mounting :rolleyes: Will be for the next time. Anyway, if it works like my old unit, the difference won't be large.

[Patrickclouds]

yeah 300watts minimum

and the firste stage withe the 00 orifice in the tev that is ratet for 500watts is holding the load of the second and third stage :D

those numbers say nothing if we don´t know how much load are on the last stage evaporator.

[-EC-UnRockStar]

i´m the same opinion

[before]

I've moved for R23 into 2nd stage today. I'd like to have more HSP for the 3rd stage R14. So, I've tuned the first TXV superheat to get about -40C there for an appropriate use of the R23. I haven't removed the R1150 from the 2nd stage TXV yet, and got -74C with a huge flow of R23 along the suc side to the compressor. Tomorrow I'll remove the R1150 from the bulb and fill it with R23. It would be nice to reach something like -78C.

Also, I've tried the 3rd stage TXV. It sounds quite promissing. Anyway, I did the testing with R14 into the lowest stage, and it doesn't work well this way. Condensing temp was about -115C (3rd stage TXV was stuck at -118C) which is possibly way too low.

:)

[piotres]

so in 3rd stage You are using cpev or txv now ? that -130c was with R1150 ?

[Ozzfest05]

so in 3rd stage You are using cpev or txv now ? that -130c was with R1150 ?

In -130 shot its CPEV r507 r1150 r14

[Tetrafluorometh]

Hey buddy i have R22 Danfoss TES or TEV not sure which i can check, got 2 of them if they fit or help with this!

[before]

so in 3rd stage You are using cpev or txv now ? that -130c was with R1150 ?

TXV for HX, CPEV for CPU evap. :) -130C was with R14; this is within the expectations. I did couple of runs of my favorite benchmark app Spi32M and it holds load in the mid -120C range this way. This is comparable with my late 3-stager which indeed was 1.5x more powerful with huge desuperheaters.

Anyway, as I've changed the 2nd stage refrigerant, this is not valid anymore.

Peter buddy, in case you never did so, you should really try a modded TXV; this is lot of fun and works fairly well. Next time I'll put one directly over a CPU evap.


Hey buddy i have R22 Danfoss TES or TEV not sure which i can check, got 2 of them if they fit or help with this!

Thanks, I already have everything I need. ;)

[Tetrafluorometh]

Thanks, I already have everything I need. ;)

Only offering Before, good luck