Cascade 5 (2 Stage GPU)

[Xeon th MG Pony]

Very nice indeed, looks like a store bought one!

[n00b 0f l337]

Beauty of zip ties and paint

[bazx]

surprising what a drop of paint can do

i will be painting all the exposed copper on this unit once complete

as its shine soon fades

here is the parts used for brazing

http://www.benchtec.co.uk/1/cascade5/brazing/

after brazing i clean up the joint with fine grit paper and use some wire wool

[n00b 0f l337]

Very nice, shame on the cover up

[[XC] gomeler]

I've been debating about painting the copper on my units also, I really hate the look of the tarnished copper after a few months Maybe a clear lacquer? Need to research melting temps and such.

[Praz]

Your attention to detail is something that is increasingly missing in most any type of work in today's world. It defines the word craftsmanship. Thanks for sharing.

[bazx]

Your attention to detail is something that is increasingly missing in most any type of work in today's world. It defines the word craftsmanship. Thanks for sharing.

thanks for the kind words but for me i am just having fun and its not hard to take my time when its a hobby


just been running some tests with the water cooled DSH and i must say i am very surprised i ran the unit for 1 hour and

35c knocked off the temps from compressor to condenser

sorry about all the temp probs all over the images i was having a look at superheat as well

the white prob line is T1 going in the DSH and the yellow is T2 comming out

[Xeon th MG Pony]

Braz, you should use flux only when strictly needed as it is considered a contaminant in the system, a rather nasty one too! Or at least use it very sparingly.

[Polizei]

Impressive with the desuperheater! I didnt think it drop temps that much.

EDIT: Now that I think about it... could the water just be cooling the copper and not the gas so much? Im sure the pipe running from the compressor to the desuperheater is quite warm, and the water is just making that cooler. Not sure though.

[Xeon th MG Pony]

True, he should move the discharge probe closer to the Hx to get a better compensated reading, to know how much it is truely cooling he'd need the probes in the gas stream.

[bazx]

decided to test an slhx for the water cooling loop

its 5/8 with 3/8 running thro the middle

just been water testing it for leaks

will hook it up saturday and see how it works

[[XC] gomeler]

Looks good, love your craftsmanship.

[tim-]

you have som interesting ideas bazx

we don't see much watercooling in phase change here.. glad to see someone introduce it

[Clemmaster]

If I understand you want to use some of liquid refrigerant to cool the water loop that itself subcools the HP line?

That's even worth than an SLHX (useless, once again)

[Freddie123]

No, I think the liquid is still cooling the refrigerant.

[Polizei]

How would the liquid cool the return gas in the suction line? The gas is colder than the liquid.

I think hes using the SLHX to cool the water even further for the desuperheater coil.

[Clemmaster]

That's exactly what I've said, and once again a classic SLHX is useless, a water loop even more (if that's what we think)

[tim-]

slhx isn't useless.. everything depends on what kind of unit and load you're aiming for.

it's pretty common on bigger r404/r507 units. But i would be carefull using a slhx as it raises the superheat. A high compression ratio and a big superheat can 'cause some issues with the oil and in worth case a broken compressor.. But i expect everyone who is playing with slhx have an eye on temptures, superheat etc..

slhx can gain or reduce the capacity of a unit depending on what unit and how it's used.. it's important to remember that the enthalpy isn't same for gas as liquid..

normally if you have a big compressor you can gain a little by putting a slhx.. which we also have seen on some SS builds with oversized rotaries. Everything depends on what it's used on and how it's used. this isn't a easy game.

regards
Tim

[Xeon th MG Pony]

SGHX Is essentualy an unloaderof sorts. For this aplication I think it is a poor choice as you need the capacity at the head not unloaded to sub cooling as the liquid line runs are not so long as to need it.

[kayl]

nice work bazx, ya taking overclocking to the next level here hey

[n00b 0f l337]

Lookin good, love the high silver and flux still, and proper reducer usage and stuff (though I prefer to swag everything myself).

[gosmeyer]

Kinda tough to swag .625 to .375

[n00b 0f l337]

There are tools to crimp down I beleive as well
Also, you can swag 1/2 to 5/8 and 1/2 will fit over 3/8" perfectly like a sleeve

[Clemmaster]

slhx isn't useless.. everything depends on what kind of unit and load you're aiming for.

it's pretty common on bigger r404/r507 units. But i would be carefull using a slhx as it raises the superheat. A high compression ratio and a big superheat can 'cause some issues with the oil and in worth case a broken compressor.. But i expect everyone who is playing with slhx have an eye on temptures, superheat etc..

slhx can gain or reduce the capacity of a unit depending on what unit and how it's used.. it's important to remember that the enthalpy isn't same for gas as liquid..

normally if you have a big compressor you can gain a little by putting a slhx.. which we also have seen on some SS builds with oversized rotaries. Everything depends on what it's used on and how it's used. this isn't a easy game.

regards
Tim

On cascade it is, yon loose some capacity for nothing... Once again remember the cascade that used one and couldn't get any lower than -33° on HX, without it it went down to -45...

[Felipe]

good it devises the one of the cooler liquid