Cascade Drawings........

**chilly1** · 06-01-2005, 07:30 AM

Originally Posted by _HL4E_HalfLife_

HX=Heat Exchange?

Also instead of using an accumulator, to boil off any remaining liquid in the suction line returning to the compressor u can wrap some copper tubing tightly around the compressor's shell to help cool it without having to worry about it sluging liquid.

Short answer is YES, but there are other considerations. Usually the tubing wrapped around the compressor is cooled by the gas adn does add load to the system.

**sl4ck** · 06-14-2006, 02:48 PM

Hi!

Could you tell me if are those Red marked right?

Thx

**Jort** · 06-14-2006, 07:35 PM

they are

**sl4ck** · 06-15-2006, 04:54 AM

Can i use 1/2" outter and 1/4" inner for the cascade HX? How long should it be?

**Jort** · 06-15-2006, 06:41 AM

you can, but you might use 5/8(outer) and 2X 3/16(inner).
more mass and surface, between 3-4meter it's fine

**sl4ck** · 06-15-2006, 07:54 AM

Does 2,90m of 0.031(0,8mm) Cap looks fair enough for R404a @ 1st Stage?
What about 2nd Stage, how long should it be?

**LukeXE** · 06-15-2006, 08:08 AM

Hm, I`m prefering ~ 2,3-2,4m of 0,8mm cap tube for 1 stage, and ~ 2,6 for 2 stage.

**godmod** · 06-15-2006, 08:34 AM

Originally Posted by LukeXE

Hm, I`m prefering ~ 2,3-2,4m of 0,8mm cap tube for 1 stage, and ~ 2,6 for 2 stage.

that cap configuration looks like for lots of capacity!?

**LukeXE** · 06-15-2006, 08:44 AM

Yeap, that`s right...you should use shorter cap tube for I stage, because it must hold big load. I think that 2,9m is too much, as I said 2,3-2,4m or maybe 2,5m for I stage should be better

What gas do you wanna use for II stage, r1150 or co2 ?

**sl4ck** · 06-15-2006, 09:41 AM

i was thinking 1st, for tests CO2, them with more experience R1150

If I have to use diferent compressors, what stage should i use the most powerfull?

**hincó** · 06-15-2006, 10:33 AM

Originally Posted by sl4ck

If I have to use diferent compressors, what stage should i use the most powerfull?

i think second..

**LukeXE** · 06-15-2006, 10:44 AM

Originally Posted by sl4ck

i was thinking 1st, for tests CO2, them with more experience R1150

If I have to use diferent compressors, what stage should i use the most powerfull?

think about holding load, condensing r1150 is such a quiet big load for I stage, plus heatload from evap. You should use most powerfull compressor on I stage, to hold loaded II stage well.

Yeah, you could use most powerfull com on 2 stage, but what you will do when I stage comp will have problems with holding load ?

**sl4ck** · 06-15-2006, 10:53 AM

Nice thinking LukeXE

What about CO2 static and running highside pressures? CO2 is most less dangerous then R1150, rigtht?

**LukeXE** · 06-15-2006, 11:09 AM

If you use expansion tank (you should of course), then I think that static pressure won`t be higher than 10bar, highside pressure is limited to amount of gas in the system, so nobody probably won`t know answer for that question, but try to keep it under 15 bar.

CO2 is less dangerous than r1150, that`s right. For example, bottle with CO2 usually has CO2 at 40bar pressure, however R1150 is under ~80bar pressure

BTW, remember to use cut-off switch and high pressure relief valve for safety

**sl4ck** · 06-15-2006, 12:09 PM

Originally Posted by LukeXE

If you use expansion tank (you should of course), then I think that static pressure won`t be higher than 10bar, highside pressure is limited to amount of gas in the system, so nobody probably won`t know answer for that question, but try to keep it under 15 bar.

I know expansion tank let us have more refrigerant in the system with less pressures, but if i donÂ´t use one for now, at the beginning, should should the static pressures the same?

**[XC] gomeler** · 07-01-2006, 02:12 PM

I sent chilly1 a PM about using his drawing for something I am writing but I'm not getting a reply. Is it generally accepted that these drawings can be copied and used elsewhere with recognition? I don't want to step on any toes but I can't draw for a damn either and his designs are amazing.

**MeltedDuron** · 07-01-2006, 02:18 PM

as you will know reggie has been going through a tough time recently. I suggest you do NOT use his designs outside the forum, as they ARE copyrighted, and his interlectual property. You may want to PM fugger about them, as they are also copyrighted to XS, and fugger is in direct contact with reggie.

**pythagoras** · 07-01-2006, 02:21 PM

The actual drawings, i.e. graphics are copyright, however the detail is standard cascade design. So you will need to use your own graphic objects.

Regards

John.

**[XC] gomeler** · 07-01-2006, 02:33 PM

K guys, thanks for the quick response. Time to look over a few various designs and whip out some MS Paint skills.

**[486]** · 07-01-2006, 06:37 PM

nice drawings

Oh, and if you label everything and not include cutoffs in the drawing someone will use them as a guide and not include them and it might explode
[ wow, starting to point out Wdrzal usually would]
and can i show my mad paint skills [i already modified a auto drawing but left the copywrights on and havent shown anyone {yet} and will delete the drawings if i can't use them.]

**[XC] gomeler** · 07-01-2006, 07:34 PM

Heh, the drawings on my website are just for comparisons sake. If someone can get a system to work following those drawings then I'd be amazed. Those are there for just comparisons sake.