[bazx]

Well I have taken the plunge and started my first cascade after building 4x single stage units now I thought it was about time and as it’s my first it will be as simple as possible

I won’t be going after uber temps with this one but you never no

I have pulled together some old parts I had lol what’s left of my first vapo
And some new stuff that I will be able to use again for the next project

Here are the parts so far:

High stage:

Danfoss NL11f(SC18 if the NL dont cut it) 402a, hx 12 feet of 1/2 copper with a 1/4 pipe in it (that’s the large coil), 1/4 copper pipe for most of runs on this stage, filter dryer with read point, cap tube (still to work out), sight glass, vapo condenser with pre cooling coil

Low side:

Danfoss NL11f co2/402a
Danfoss oil separator or I might have ago at a home made one
Hand valve oil return
High pressure cut off valve
Control unit something along the lines of this unit EWPC-901 I may have something else coming, cap tube length undecided as yet

My choices of gases is based on the fact that I already have the 402a and I can get the co2 cheap. r23 will be In the next one

Mocked up the high side today just need to fill the compressor with oil attach the cap tube and braze it up

Some picks

[bazx]

[bazx]

[Sucka]

Looking good so far bazx

Can't wait to see the damage you do with that bad boy.

[greenmaji]

I was waiting to see if you had more pictures to post

Your pipe bending skills are killer, did you make that heat exchanger?

[Overclocker.IL]

Wow ! Awesome work ! really neat pipe bending there !

[Bhugarov]

OK admit it...it's really a still right?
Seriously that looks like some serious cooling potential, I will be watching this one.
BTW Nice camera

[bazx]

Originally Posted by greenmaji

I was waiting to see if you had more pictures to post

Your pipe bending skills are killer, did you make that heat exchanger?

yes its not to hard to make

put the pipes inside each other and bend around a propane bottle

[bazx]

this unit is more of a learning curve for me so i dont see it lasting to long
once i have gained some knowlage the comp will get big and the gas will change

@ sucka good to see you around again

[Gautam]

Very exciting! Looks beautiful as its taking shape already, your skills are top-notch.

I should already know this, but what are the specs on the NL11F? 1/2hp?

[XeonStrikeForce]

Wheres the suction line accumulater? you may want to think about that if your first stage is fed via a cap tube and not a TXV so you don't end up slugging your compressor

Aside from that every thing is looking good so far.

[Electron Chaser]

Nice layout and craftsmanship and is already taking shape nicely.

What more can I say except.

Subscribed!!!

[proth]

Another work of art coming up !!

Glad to see you have the new shop up and running.

[predator500]

Is the condensor going to be big enough it look to be small for a cscade.

[greenmaji]

^^that SLHX looks to reduce the needed capasity of the condensor to me.

[bazx]

Originally Posted by XeonStrikeForce

Wheres the suction line accumulater? you may want to think about that if your first stage is fed via a cap tube and not a TXV so you don't end up slugging your compressor

Aside from that every thing is looking good so far.

you no this is the first unit i have not put one in lol most all the ss being built
over @ xs have done away with them but i still think its a good idear to have one mybe in the next set of mods i will

[bazx]

Originally Posted by Gautam

Very exciting! Looks beautiful as its taking shape already, your skills are top-notch.

I should already know this, but what are the specs on the NL11F? 1/2hp?

na the NL11F is only a 1/3 it should be around 3/4 going by others i have seen
and will most likely end up as a sc21 big sob but for this first experiment i will give it a try as i have one

[bazx]

Originally Posted by predator500

Is the condensor going to be big enough it look to be small for a cscade.

i have a bigger one here but thought i would try this one as i have it

and as greenmaji says the pre coil will take out alot of heat so we will see on that one

[bazx]

Originally Posted by greenmaji

I was waiting to see if you had more pictures to post

Your pipe bending skills are killer, did you make that heat exchanger?

thanks dude you will see me make mistakes with this unit as its the first try
so if you see anything i am missing tell me please

[bazx]

Originally Posted by proth

Another work of art coming up !!

Glad to see you have the new shop up and running.

i no where you are getting that popcorn from

[bazx]

[TreeNode]

Hot (but cold)!

[bazx]

just charged the hx and all seems to be going fine the temp prob is attached
right at the suction return so should show its worst temp

i will need to put a load in there before i will be happy with it

for the moment the inner 1/4 copper pipe of the hx has nitrogen in to stop any mosture

i went for 5 feet of .028 cap and it seems ok for now untill i load test

[Pf.Farnsworth]

You dont really want to be pushing the liquid up. If you want to make it right elevate your condenser about filter and your "desuperheater" above condenser.

Idealy you would have everything go down working with gravity not against it. But if you must have something go up make it gas not liquid. Reduces pulling and helps with oil as well as refrigerant flow. Sure the margin is dependant on velocities but why fight a force if you can have it work for you.

Oil separator/return would be anice touch too. No reason to push the oil all around when you dont need to, screw up your metering devices consistensy and pull. Not a huge deal to make the system work but it just depends on how well you want it to work. It makes a difference in the long run.

[Beast_USA]

Very nice keeping an eye on this one

[XeonStrikeForce]

I still thing you need an accumulator on there so you don't liquid slug the compressor, other then that it looks like a beauty!

And as for the coil he has it perfect, it helps improve thermal stability & reduce the chance of slugging, but not enough to negate an accumulator.

[Pf.Farnsworth]

Originally Posted by XeonStrikeForce

I still thing you need an accumulator on there so you don't liquid slug the compressor, other then that it looks like a beauty!

And as for the coil he has it perfect, it helps improve thermal stability & reduce the chance of slugging, but not enough to negate an accumulator.

I agree 100% on the accumulator, he should put one in.

I dont know if we are talking about the same coil, but its your basic kinematics here, you dont want to work against gravity. As you said his inadiquate component layout in effect helps with the accumulator issue but one, not enough, and two it shouldnt, thats why you have an accumulator, so it can do its job and you dont have to make a rollercoaster of your piping so you can avoid putting one in. I am not saying this wont work I am just saying this is not the perfect way of doing it.

[before]

Very sweet!

[bazx]

Originally Posted by Pf.Farnsworth

I agree 100% on the accumulator, he should put one in.

I dont know if we are talking about the same coil, but its your basic kinematics here, you dont want to work against gravity. As you said his inadiquate component layout in effect helps with the accumulator issue but one, not enough, and two it shouldnt, thats why you have an accumulator, so it can do its job and you dont have to make a rollercoaster of your piping so you can avoid putting one in. I am not saying this wont work I am just saying this is not the perfect way of doing it.

you must of missed this post

you no this is the first unit i have not put one in lol most all the ss being built
over @ xs have done away with them but i still think its a good idear to have one mybe in the next set of mods i will

you seem to no a great deal about cooling systems and i am keen to learn from someone as your self please link me to some of your phase cooling projects and results

as i said at the beginning of this thread this unit is just a voyage of discovery
and once completed will only live for one weekend as my new comps have now arrived danfoss sc18 and sc21 and the real job will begin

below is a list of some of my cooling with results threads i look forward to reading some of yours and no dought learning a great deal

http://www.ocforums.com/showthread.php?t=448906
7900GTX Single Stage GPU

cpu ss
http://www.benchtec.co.uk/1/cpu-ss/1.JPG

First impressions of ln2
http://www.ocforums.com/showthread.php?t=431505

@ last the beer cooler is here
http://www.ocforums.com/showthread.php?t=420654

3.7ghz single stage fx57
http://www.ocforums.com/showthread.php?t=430903

phase cooled 1x7800GTX /vmod/ benchies 56k warnin
http://www.ocforums.com/showthread.php?t=408940

Vapochill GPU conversion 7800/6800 (56k warning)
http://www.ocforums.com/showthread.php?t=403071

thanks baz

[XeonStrikeForce]

Know = To understand, knowledge, ability to use rememberd data in a functional way

No= No, as in do not, to stop and action or not to start the action