Parts:
1st and 2nd stages are cascade 3
http://www.xtremesystems.org/forums/...d.php?t=117279
3rd stage:
little devil cascade case (same as cascade 3)
compressor: Danfoss SC21CLX
Hx: 12 plate
Oil sep: Temprite 900 series
vapo mini condencer
pressure releif valve 24 bar
danfoss pressure cut out KP5
pressure gauge
spun drier/filter
cold ice evap
refigerant R507/R23/R1150
i will be stacking one LD case on top of another for this unit
pic of the 1/2 stage
Last edited by bazx; 06-05-2009 at 10:02 PM.
Last edited by bazx; 06-05-2009 at 10:03 PM.
Last edited by bazx; 06-05-2009 at 10:03 PM.
as the case is being shipped i have begun to put the 3rd stage together
on some 18mm mdf board which will fit straight into the case when it arives
WOW baz this is going to be really something. I am glad you took this approach and decided to make a 3stage unit. The craftsmanship of the 1/2 stage is really something.
Are you simply going to put the other case on top and remove the roof on the 1/2 stage case , Or cut into the roof for the required space?
Good luck
yes on topAre you simply going to put the other case on top and remove the roof on the 1/2 stage case , Or cut into the roof for the required space?
no need to take the roof off there is already a hole where the old suction return was
should be around there was thinking of using a longer cap maybe 2,8m of 0.031Are you hoping for around -75C condensing on the thrid stage?
Good work!
I hope the SC21 is big enough in the first stage. I wasn't satisfied with the performance of my 4 stage, with SC21 in first stage. But maybe you have better luck.
What refrigerant will you use for the third stage? R14?
"refigerant R507/R23/R1150"
Maybe really go with R14, it will be better than R1150 in III stage...
maybe better but i dont have it so for now it will be 1150Originally Posted by LukeXE
@ cold_ice why did you not like the sc21 1st stage on ya 4
it only has to condence r23 in this unit
maybe better but i dont have it so for now it will be 1150
@ cold_ice why did you not like the sc21 1st stage on ya 4
it only has to condence r23 in this unit
you should get nice temps, I with -60*C under load HX achieved -103*C@215W loaded with ethylene, you should get similar result
I love your builds
you should get nice temps, I with -60*C under load HX achieved -103*C@215W loaded with ethylene, you should get similar result
I love your builds
thanks luke that's what i was thinking with the extra cooling on the 3rd stage hx i will get the most from the R1150
brazed up the hx and some of the pipe work tonight
Last edited by bazx; 06-05-2009 at 10:04 PM.
Hey Bazx I love that little condenser you got on there, where did you get it from if you dont mind me askin?
cold_ice shop here
http://www.kaeltetechnik-shop.at/
Looking good Baz. So you giving up LN2? I might of just gotten my self an LN2 contanier!
havent given up just not much good at it
LOL Cascades for you and Ln2 for Thicky eh
I was waiting for this thread to appear Baz
Maybe if you are unhappy with the performance of R507/R23/R1150, you could allways change the R23 to R1150 too, it might gain just a little bit. I'm sure FUGGER's 3-stage has R1150 in both the 2nd and 3rd stage.
Oh btw, to anyone in the UK wanting LN2... Try finding it at a decent price LOL! Here we can't transport it unless you have a specialised vehicle. I was quoted about £2.40 + VAT...PER LITRE! AND £35 delivery!! So for a typical 30/35 litre dewar, it would cost well over £100 in total. FAR FAR too much imo, which is why I didn't buy a dewar.
The thing is there isn't the demand for small amounts, which is why it's so expensive. Gas suppliers such as BOC & Energas only want to deal in huge quantities, around 240 litres or more...
Last edited by Brettbeck; 12-17-2006 at 11:47 PM.
BOC only ship to non-residential addresses as well, at least thats what they told me, I didnt even get as far as prices.
______
Sometimes, it's not your time. Sometimes, you have to make it your time. Sometimes, it can ONLY be your time.
2nd stage is done with an unloaded temp of -81
Last edited by bazx; 06-05-2009 at 10:04 PM.
Last edited by bazx; 06-05-2009 at 10:04 PM.
also got the 3rd stage finised up brazing and some nitrogen in for leak testing
tomorrow i will put the R1150 in
thanks tom
i am a lil worried it is all going to easy
Nice, can`t wait to see results !
R23 on II stage, am I right ? I would try R1150 on II stage and III
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