Green SC SS in progress

Duniek · 08-18-2006, 05:28 AM

hi
this is my next ss
compressor is SC18G (3/4hp)

case dimensions
lenght - 50cm
width - 23cm
height - 24cm

regards

aasmaukr · 08-18-2006, 08:11 AM

Wow, SC18G is chill, first pic doesn't work for me... What refrigerant are you gonna charge with?

Duniek · 08-18-2006, 09:02 AM

Quote:

Wow, SC18G is chill, first pic doesn't work for me... What refrigerant are you gonna charge with?

maybe r402a, maybe r404a, maybe cyclopropane

(~80 euro/kg)

aasmaukr · 08-18-2006, 09:14 AM

Okay, Cyclopropane = -32,9 degs celsius boilong point? Isn't that a bit warm?

Duniek · 08-18-2006, 02:25 PM

my fault
this isn't cyclopropane but this gas is condensing @ ~25bar @ 45*C
and vapor @ ~ -70*C @ 0 bar
I don't remember name this gas

aasmaukr · 08-18-2006, 02:29 PM

Sounds good

How about load handling?

Edit: 80 euros/kg is pretty damn expensive right? Blend with r402a maybe?

Duniek · 08-21-2006, 08:32 AM

boring front of case
in next ss I make another front if I buy dremel

Duniek · 10-01-2006, 04:45 AM

project is alive

~~Pete~~ · 10-01-2006, 05:13 AM

Condesnor is massive!!! Should be good for cooling it all down, no coil need then i guess.

n00b 0f l337 · 10-01-2006, 09:22 AM

He's also using a large copmressor, I'd still put in the coil for vibration dampening though.

Duniek · 10-02-2006, 02:49 AM

guys from polish forum suggested me, in order to I make a autocascade.
hmmm, OK
parts for phase separator, interstage hx, slhx, I will use cpev for both stages

J0d3r · 10-02-2006, 03:45 AM

looks sweet, willing to see more

LukeXE · 10-02-2006, 04:15 AM

I would suggest to not use cpev in first autocascade, even for both stages.

What gas you gonna use ? If CO2 as low stage gas, cpev is really bad choice.

I think you should start with captubes, too much load changes for cpev...of course I`m suggesting you, you will do what you want

Duniek · 10-02-2006, 05:00 AM

gas will be r404a/r23
i use cpev for 2 stage
for 1 stage i will use txv or cpev

Duniek · 10-20-2006, 08:12 AM

little update

evap

42mm plugs

brazed phase separator

Nosfer@tu · 10-20-2006, 05:13 PM

Subscribed.

n00b 0f l337 · 10-20-2006, 05:26 PM

Awesome duniek, but your already going to have large problems with your gas selection, I hope you can figure it out from this comment.

kayl · 10-20-2006, 08:48 PM

good luck with the auto-C.

like the 42mm plugs, i had some similar done once.
did you put some copper wool in the seperator?

Mr. Popo · 10-20-2006, 08:52 PM

Quote:

Originally Posted by kayl

good luck with the auto-C.

like the 42mm plugs, i had some similar done once.
did you put some copper wool in the seperator?

Why copper?
Whats wrong with basic (cheap) steel wool?

n00b 0f l337 · 10-20-2006, 09:00 PM

Steel wool is very hard to keep from bursting into flames or oxidizing.

ALSO: CPEV may not work the way your wanting it to, it sets the suction pressure, and therefore you'll get an average between the two CPEV's when you don't want that.

LukeXE · 10-20-2006, 10:23 PM

don`t use R4xx gas, as I talked with NoL, it will separate...

Clemmaster · 10-21-2006, 05:36 AM

Even with R170 gaz? That's the question I was asking to myself...

LukeXE · 10-21-2006, 08:52 AM

Even with R170 gas...

R402/R404a or other R4xx gases are mix of two or more gasses, with different P/T charts...

So, there is possibility, that in phase separator R4xx will separate, half of it will go to evap, and second half to HX

n00b 0f l337 · 10-21-2006, 09:44 AM

And since r404a is r507 and r134a, whichever is lighter is most likely to seperate out.

Duniek · 10-29-2006, 07:15 AM

hello
updates

yesterday night I brazed evap

and
cleaned

with insiluation (horrible looking holldown is temporary of course

)

and I make 2 in 1 HX
suction acumulator (42mm pipe) with discharge acumulators (2x15mm pipe inside 42mm)

regards

EDIT:
I used bigger evap than I show in #15 post
It's on right on photo