Kayls bench cascade

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08-26-2005, 08:19 AM
kayl

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Kayls bench cascade

tonight i got a start to my 2x 1Hp cascade.
This one is going to be compact i hope. :p
aim -100c benching :toast:
http://www.xtremesystems.org/forums/...id=36215&stc=1
08-26-2005, 08:31 AM
eva2000

sweet :slobber: :D
08-26-2005, 08:42 AM
kayl

thanxs eva200, i cant wait till i got the cash to get ya 3700 clawhammer off ya :toast:
then i can have something worth benching. :stick:
08-26-2005, 09:11 AM
Waus-mod

hahah Still going fast! in the last half year i saw (i think) 3 cascades (if it aint more haha)

GREAT work!
08-26-2005, 09:17 AM
Jonesy

What size tubing is that, and how tight a diameter did you wind it? It looks really tight. I was wondering how you did that without collapsing the tube.
08-26-2005, 09:41 AM
wdrzal

I was just thinking the same thing, if you did that by hand thats just awsome kayl !!!!

look at that 90 degree bend on the right end, thats tighter yet.
08-26-2005, 10:00 AM
kayl

Quote:

Originally Posted by Jonesy

What size tubing is that, and how tight a diameter did you wind it? It looks really tight. I was wondering how you did that without collapsing the tube.

its 1/4" and its about 40mm diameter.
i wound it around desk fan stand.
it took a few goes. This pipe is crap hey, the last roll i had was much thicker walls. this stuff kink not carefull.

Quote:

Originally Posted by wdrzal

I was just thinking the same thing, if you did that by hand thats just awsome kayl !!!!

look at that 90 degree bend on the right end, thats tighter yet.

tahnxs wdrzal yep by hand. that bend you talking about, got a slight kink, but i got it out and brazed it a tad to re-enforce again.

I will have 2 chilly condensers sitting under the hx and 2 rotaries on the other side.
I also have another idea for a special 2nd stage Suction line hx.

Is it better to have the suction line hx for the second stage before the hx or after the hx cooling the 1150 liquid line.??

i know last cascade it was just too cold and needs to be heated alot.
08-26-2005, 10:15 AM
wdrzal

whats the diameter of the copper tube it fits inside?
08-26-2005, 10:16 AM
Tonic

Nice coil :)

But.. I'm afraid that an internal volume of largest pipe will be too large for evaporating (if this largest pipe is
supposed to work as evaporator). Do you remember Jan's autocascade heat exchanger, which was looking as
your? And he had problems, refrigerant wasn't flooding inside largest tube properly and also temperatures
was so bad.

EDIT :

About placing suction pipes, somewhere berkut said it's better to place after interstage HX, but I don't know why..
I hope someone knows and will tell us ;)
08-26-2005, 01:26 PM
hatemi

You can flood that HX easily with a proper compressor;) with those rortaries it will be a walk in a park kinda stuff. Somehow this design looks familiar ;)
08-26-2005, 03:27 PM
Waus-mod

its sure is a nice hx.. very compact and looks like a waterchiller reservoir!
08-26-2005, 04:30 PM
stockhatch

Looking good kayl. That IHX looks great! I hope it works as good as it looks :)
08-26-2005, 08:04 PM
Cpt Twitchy

I like that nice compact HX.
08-26-2005, 08:29 PM
runmc

Quote:

Originally Posted by kayl

Is it better to have the suction line hx for the second stage before the hx or after the hx cooling the 1150 liquid line.??

That sounds like a loaded question to me :confused:

If your talking about sub-cooling your second stage discharge with the second stage suction, the way I did it was subcool the discharge gas before the interstage hx with the suction line hx and then subcool the captube with the suction line. The suction line would be subcooling the captube first.

Did I say that right? :am:
08-26-2005, 08:49 PM
kayl

1 Attachment(s)

Quote:

Originally Posted by runmc

That sounds like a loaded question to me :confused:

If your talking about sub-cooling your second stage discharge with the second stage suction, the way I did it was subcool the discharge gas before the interstage hx with the suction line hx and then subcool the captube with the suction line. The suction line would be subcooling the captube first.

Did I say that right? :am:

thanxs guys.
runmc thats what i though.
But recently berkut said to do the second stage.
I think either would help.

i wasnt decided so i did both :toast:
its a little hard to follow
but right feed is to 1150 capillary line
left feed is 1150 in.

http://www.xtremesystems.org/forums/...id=36234&stc=1
08-26-2005, 08:56 PM
kayl

Quote:

Originally Posted by wdrzal

whats the diameter of the copper tube it fits inside?

the tube is 50mm

Quote:

Originally Posted by Tonic

Nice coil :)

But.. I'm afraid that an internal volume of largest pipe will be too large for evaporating (if this largest pipe is
supposed to work as evaporator). Do you remember Jan's autocascade heat exchanger, which was looking as
your? And he had problems, refrigerant wasn't flooding inside largest tube properly and also temperatures
was so bad.

EDIT :

About placing suction pipes, somewhere berkut said it's better to place after interstage HX, but I don't know why..
I hope someone knows and will tell us ;)

yeah i remember , i hope its not an issue, i had same problem with map gas hx with coil inside. the 2 extra pipes inside i hope will restrict it a little, and longer capillary maybe.
Buts its sort of short and as hatemi said 1Hp really pump it in and suck it out.
yeah i think the suction line after will really condense the 1150 well i think.
08-26-2005, 09:38 PM
runmc

Quote:

Originally Posted by kayl

But recently berkut said to do the second stage.

I don't understand what you mean. I was talking about the second stage.
08-26-2005, 09:46 PM
kayl

Quote:

Originally Posted by runmc

I don't understand what you mean. I was talking about the second stage.

sorry, i meant second stage 1150 liquid out.

i 100% agree with what you said before, thats the way its in the stickies also.
08-26-2005, 10:09 PM
wdrzal

runmc was correct before, compressor to desuperheater to interstage HX

ps what time zone are you in kayl, are you +8 ,+9 or+10 gmt
08-27-2005, 12:55 AM
hatemi

I would mount that HX as low as it is possible. That way it will be easier to keep it flooded but still without it flooding back to the compressor. Actually I believe it would be a good idea to put the HX below everything else. Make a box/baseplate where it will fit with enough insulation and build everything else ontop of that :)
08-27-2005, 11:42 PM
kayl

2 Attachment(s)

thaxs for that hatemi makes sense, have a think about that one i will.
wdrzal i check and let ya know.

this is my evap i used 7/32" drill bit in drill press.
then a 3/16" drill bit to clear the channels in a hand drill.
block is 40mm square and cost $10, thats a cheap evap hey. :toast:
http://www.xtremesystems.org/forums/...id=36299&stc=1
http://www.xtremesystems.org/forums/...id=36300&stc=1
08-28-2005, 02:28 PM
Tonic

Canals surely looks better in comparing to previous evaporators :) But you should work a little on walls, there they're thin ;)
08-28-2005, 02:51 PM
gkiing

Quote:

Originally Posted by Tonic

Canals surely looks better in comparing to previous evaporators :) But you should work a little on walls, there they're thin ;)

It's not too bad and the tops will be covered with filler, keep in mind that the wall thickness of most soft copper tubing is only 1/32"
08-28-2005, 04:20 PM
kayl

Quote:

Originally Posted by Tonic

Canals surely looks better in comparing to previous evaporators :) But you should work a little on walls, there they're thin ;)

its atleast 2mm i think, and what gkiing said is very true as well :toast:
08-28-2005, 04:47 PM
stockhatch

Lookin good. There are a couple of spots that look like the channels arent fully cut/connected, is that just an illusion, or what?

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