Cascade 5 (2 Stage GPU)

[bazx]

cascade 5 GPU

First stage

compressor: LG NJ282P R-407C i will also testing a PG130XIT-4CRE 8000btu for future use on this stage

Hx: 12 plate

Danfoss tev: Tes2 00 orifice

Receiver: RLV 02 PED 77*220 V=0,88l

Condenser: 1,10kW

in line filter 1/4 flare

High pressure gauge

The copper pipe sizes used in this stage are

1/4 inch used on the expansion valve suction sensor to the suction return

5/16 compressor to the condenser and receiver

3/8 used on the run from the receiver to the expansion valve and HX suction return

1/2 used on the expansion valve to HX

Fittings

1x 5/16 straight

1x 5/16 tee

2x 3/8 tee

1x 3/8 elbow

1x 1/2 elbow

2x 3/8 flare nut

1x 1/4 flare nut

1x sevice port

second stage

compressor: PG130XIT-4CRE 8000btu

Oil separator: temprite 900

danfoss high pressure cut off KP 5

cold ice mini condenser

cold ice pressure relief valve 24 bar

High pressure gauge

spun drier/filter

Chilly type evap with one extra turn

1m braided suction return

refrigerant: R507/R23 for tests with PG130XIT-4CRE 8000btu on 1st stage

then R507/R1150 when the LG NJ282P R goes in

the unit will also have shut off hand valves located on the suction return and cap tube for easy change of evaporators and setups

there will be no case for this unit

alto i have called this a gpu cascade it will have other jobs as well

i am making it so i can just remove the evap and suction return with out having to re gas the unit

this is so i can change the function of the unit at will

i.e.: evap for single card benching all complete with suction return and insulation, a second set of evaps for sli and a third set of evaps for system benching for the ram and Northbridge

this will give me what i have wanted for some time and save me a packet on ln2 with any luck

 

[bazx]

safty first

 

[bazx]

layout

 

[bazx]

 

[bazx]

all the parts are now ready to be piped brazed up

 

[bazx]

oil sep

this is the oil sep i have been using in the last few cascades

its an automatic float type and very easy to use just fill with oil

and braze in

larger image

http://www.net7.info/1/cascade5/layo...t/DSC00604.JPG

 

[bazx]

these are the hand valves i will be using 1/4 for the cap tube and a 3/8 for the suction return

i have my dough ts that the 3/8 will give enough flow for the suction return and if it fails to work well will be changed out for some thing better

maybe the shut off valve assembly you find on air conditioners condenser units

both valves will be mounted in a insulated box similar to the HX box

 

[bazx]

Hx

before brazing up the expansion valve i raped it in damp cloth

 

[bazx]

if you look at the tes2 from here you can see where the orifice is fitted into the opening

 

[Phil Stanbridge]

Very nice Baz - you mention this is your alternative to LN2 - what sort of temps will you be looking at? Especially with 507.

 

[maverik-sg1]

I just the craxy things you do baz - but with massive attention to detail and safety of course - muchos respect my friend.

Cheers

Mav

 

[bazx]

Very nice Baz - you mention this is your alternative to LN2 - what sort of temps will you be looking at? Especially with 507.

507 is just the first stage gas and is good for around -45

with r23 in the second stage i will be looking at about -80 loaded

on the first tests with the smaller first stage comp

when the LG compressor goes in the first stage will still make around -45

but will be able to hold loads better with its larger capacity

this will allow me to use 1150 in the second stage and reach temps of around -100 on a gtx

@ mav thanks

 

[K404]

BazX: sticking a proud 2 fingers up at the carbon footprint era!



I was looking at LN2 gear last night for some very distant plans..I cant say I blame you for moving to cascade. Even taking into account the electricity bill it could well be cheaper in the long run.

Nice pics, looking forward to more

 

[Phil Stanbridge]

Yep kudos indeed. I like the simple aesthetics. Very tidy and clinical looking almost.

I must send you some EP-UK pimpage stickers to plaster all over it.

 

[bazx]

BazX: sticking a proud 2 fingers up at the carbon footprint era!



I was looking at LN2 gear last night for some very distant plans..I cant say I blame you for moving to cascade. Even taking into account the electricity bill it could well be cheaper in the long run.

Nice pics, looking forward to more

don't get me wrong i like ln2 as a broadsword if you have chips that don't bug until -150 but it gets a bit tricky when you want to hold a specific

temp unless you have an uber copper pot

also at £80 a pop for the weekend it don't take long before you could have bought a cascade

also i am a slow overclocker and need more time to work and a cascade lets me

and i can go in and have my tea and come back later and work

 

[bazx]

Yep kudos indeed. I like the simple aesthetics. Very tidy and clinical looking almost.

I must send you some EP-UK pimpage stickers to plaster all over it.

thanks Phil

don't forget i build these units for my self so don't have to worry about customers like you do

 

[K404]

also i am a slow overclocker and need more time to work and a cascade lets me

and i can go in and have my tea and come back later and work

I understand that 100%! :B I bench alone and I didnt realise in advance that things like toilet breaks or grabbing a sandwich would become serious challenges!

Plus- yea, if your cooling is evaporating/sublimating you feel pressure (imaginary or not) to get on with it while ya can and thinking kinda goes out the window...especially benching with more than 1 tube!!

Cascade has a lot of advantages for the benching side, without a doubt

 

[Thickbrit]

Yay,go Bazx,awesome stuff mate.

 

[fatty]

Very niiice looking unit mate can't wait to see it in action

 

[bazx]

1st stage pipework

thanks lads

just finished up the pipe work for the 1st stage

still need to braze it in

need to clean up my work area first can't think straight anymore

i have made a layout change and swapped the oil sep position for the DSH

this after some thought will give me easier runs when piping the 2nd stage