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LukeXE Guest


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R744 Autocascade LukeXE Sep 11th, 06, 08:02 PM #1

Heya

Sometime ago I decided to make autocascade for my usage

Rotary 1HP, new 1,9kW condenser, captube, gas R290/R600 + co2 etc.

Scheme (my cascade doesn`t have the last SLHX)



Few photos of uninsulated unit.







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LukeXE Guest


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LukeXE Sep 11th, 06, 08:03 PM #2







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LukeXE Guest


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LukeXE Sep 11th, 06, 08:03 PM #3
and insulated...






Phase Separator

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LukeXE Guest


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LukeXE Sep 11th, 06, 08:03 PM #4
SLHX before phase separator





HX temperature.




R290 + CO2







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LukeXE Guest


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LukeXE Sep 11th, 06, 08:03 PM #5




The lowest temp at this momment, I will try to go lower.



Cheers
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MaReNoStRuM Guest


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MaReNoStRuM Sep 11th, 06, 08:13 PM #6
i like this autocascade its very nice and clean job instead of the last one

maybe little more tuning and you will reach the goal?!, -100C

i read your girlfriend was very helpfull and she deserves the afford too

whats exactly high pressure? i think u said its +0,3bar lowside, right?
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LukeXE Sep 11th, 06, 08:18 PM #7
At -83*C on evap lowside pressure was ~ -0,5bar, highside maybe ~8bar.

At normal work I`m trying to calibrate it to run at 15/0bar (load).

about that -100*c...It`s hard work to do, I will try to reach that temp with co2 one more time, but I`m not sure that I can do it I will be glad when at load I will see -70*C (155W dummy load)
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MaReNoStRuM Guest


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MaReNoStRuM Sep 11th, 06, 08:21 PM #8
hey luke, whats the mix of R290+Co2 in percent?, why do u use R600? i think it isnt needed.

for R290+Co2 its a very good temp, i reached about the same without freezing the suctionline or evap.

maybe u could get ethylene and add some, because HX temps with about -50C would be enough!

pressure is also down, maybe there isnt condensing enough R744, with 10bar HD and -40C it would condense everything, maybe try to add some more R744 and it will go down to -90C with little vacuum (-0,1)
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Last edited by MaReNoStRuM; Sep 11th, 06 at 08:26 PM..
LukeXE Guest


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LukeXE Sep 11th, 06, 08:24 PM #9
hm, in percents...I don`t know.

About R600, I can`t get pure propane, so I must use propane-butane mix.

Ohhh, I would have ethylene, my friend ryba has it, but don`t wanna borrow or sell some :| I think that R1150 should work very fine in that autocascade.

I want to go under -90*C, like in my previous autocascade for XS Auto-C competition, here`s the photo :



R290/CO2
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MaReNoStRuM Sep 11th, 06, 08:31 PM #10
2 bad he wont give/sell some to ya. -.-

these are great temps!

did you got any problems with freezing?

i checked and i think 60/40% (R290/R744) works very good.

thx for posting your project here! very aprecciated.

i think youre really turning into an autocascade master! or even turned?
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Shamino
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Shamino Sep 11th, 06, 11:31 PM #11
that is such a sweet job luke!! very skillful job on the pipe in pipe HX... personally i tried a big pipe filled with lots small pipes hx i know the difficulty in brazin to isolate stage 1 and 2.

i love the looks as well, this isnt the same one at the polish ASUS party? what a waste, this looks killa.
any icing problems, or the r290 takes care of that?
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LukeXE Sep 12th, 06, 03:18 AM #12
thanks Shamino !

no icing problems that one isn`t that same like at asus party, it`s new autocascade. Old unit don`t exist now

Thanks MaReNoStRuM too for nice words, I love autocascades I want to build 2 or 3 stager but...don`t have money for gasses, even for 1150
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ChampionLLY Sep 13th, 06, 02:25 AM #13
wow... u are pro..
i dun even understand the diagram.. =S
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Jonny5isalivetm Sep 13th, 06, 03:01 PM #14
Very Cool

Tho does not it not take up tremendous amounts of room?




J5
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Shamino Sep 14th, 06, 01:48 AM #15
Quote:
Originally Posted by Jonny5isalivetm
Very Cool

Tho does not it not take up tremendous amounts of room?




J5
hey, thats still way smaller than my tradtional cascades!!
for -80+C, thats about as small as they can get, trust me
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