Captain....she really is beautiful!!! :DQuote:
Isnt she beutiful.
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Captain....she really is beautiful!!! :DQuote:
Isnt she beutiful.
That thing will trip breakers if its all on the came circuit. I have to run extension cords across the house to get enough power into one room.
Takes a fork lift to move too, nice.
Mine fits in a 24x24 inch square area and its on wheels.
Truly a thing of beauty, captain. Nice torchwork, too. Ya done good. :D
its on wheels i just have it up so i can work on it easier. And as fer the power i wired in a couple buck boosts so i get a little more bang for my buck on voltage. she is big though. If i wanted to spend money and buy new stuff i supose i could make her alot smaller, but thats what i got so thats what i get.Quote:
Originally posted by FUGGER
That thing will trip breakers if its all on the came circuit. I have to run extension cords across the house to get enough power into one room.
Takes a fork lift to move too, nice.
Mine fits in a 24x24 inch square area and its on wheels.
thanks gary:) :) :)
What are you using the Buck/Boost trans for? From what voltage to what?
damm bud nice work....
sorry i missed your phone call yesterday.
you called my home....i was at work....next time remember call work..i am there most of the time anymore...LOL
later,and again...great work:toast:
Damn.... how do you remember which tube goes where?
Excellent work man!
hello,
+ My first question, is that I'm just wondering about the power of the two compressors :
- first stage
- second stage
+ And what about cap, how did you calculate the lenght ?
bowman was saying that you were lucky about that because generaly you have to try some different lenght. But it could exist a way to calculate it, couln't it ?
really impressive ;)
the buck boost is just a single phase general purpose transformer, it basicly .....adds voltage to system kinda..
as fer the cap tube...i just kinda knew;) ;)
aenigma has been helping me out with the system design and cap tube size, as of late.
Is it a 12/24 or a 16/32? I take it you are raising 208 to either 220 or if it is a 16/32 somewhere near 230v.
12/24 120v trust me, it needs it,. i may ad a conditioning board to monitor voltage conditions.:) :)
heres a dupont link to properties, aplications, pressures, and everything else on most new refrigerants....507,410a,404a, ect...
http://www.dupont.com/suva/emea/products/index.html
alright these stickys are a little excessive. you can unsticky mine if you want.
its come to my atention that many of you would like to build cascade systems. Aenigma and myself made a short list that hopefully answers some simple questions for the "newbs". please let me know if i forgot anything.
Rules of a cascade system.
1. you need 2 or more compressors
2. if not 2 compressors than at least 2 stages, if you dont know what i mean by stage, dont even think of building one
3. You cannot just mix 2 refrigerants to get to colder teperatures.
4. i am quit sure, between all of the teachers at my local refrigeration technical school, they could not build a autocascade.
5. You cannot just chill water as a first stage unless its -35c water.
6. the high stage uses high temperature gas that condenses to liquid at -35c. if you cant do that, you cant have a second stage
7. if you havent built a working normal refrigeration system with minimal problems, dont try cascade.
8. Always build and test the 1st stage before touching 2nd stage.
9. High pressure switches ar always a good idea. set to 300psi.
10. if you meet the qualifications/rules, then relief tanks are absolutely mandatory.
11. NEVER use high pressure gasses you arent 100% sure about.
12 Always research the refrigerant you think you can use, check its vapor pressure diagram and properties and make sure it is compatible with everything in your system (copper, steel etc.)
http://www.airliquide.com/en/busines.../gases/gasdata is a great place to research your refrigerant.Coolpack/refrigeration utilites (http://www.et.dtu.dk/Coolpack/UK/" is a great utility for researching your refrigerant.
captaincascade... you once said you couldnt do a autocascade (it didnt work properly) and you had 450+ psi head pressures. Did you find the cause of this problem or did you just waved your hand and said "go to hell" ?
i was depressed so i had my aprentice dismantle it. i will try again soon.
im asking you about this cascade beacause of technical problems with my full cascade - compressors...
max i can afford is 1 compressor so im stuck with a autocascade wich i find easy to do and calibrate, i havent decided on what expansion valve ill use on the HX, im thinking of using a injector, the same thing on the cpu's evaporator. The second best would be a TXV with a 00X orifice... + the system i designed would be very small, almost prommy like.... And i could pretest my system on my trusted SC10B and later exchange the compressor for a bigger unit, like a SC18 wich is quite affordable
Assuming you dont join up your lowside HX on an auto, whats to stop you loading the lowside with hot water and a water pump with the expected heatload to get the high side charge right.
Then add an expansion tank and connect up the evap to the lowside (instead of pumping hot water thru the HX) and vapor charging with the lowstage refrigerant.
Surely that would get your charges right, although you dont really want to run water thru the lowside HX it was the first heat transfer fluid I could think of!
I still dont see an autocascade being overly difficult, although I usually overlook a thing or 50 ;)
]JR[
arro
good luck with that berkut. You may not find this as easy as your cascade was
gant
Its not that i want - i have to :\ And the harder the beter... thats why i also make a Jet engine atm, made a part of the combustor assembly and tested it with mapp gas and torches ;]
Ill post some drawings in a sec...
Quote:
Originally posted by ]JR[
Assuming you dont join up your lowside HX on an auto, whats to stop you loading the lowside with hot water and a water pump with the expected heatload to get the high side charge right.
Then add an expansion tank and connect up the evap to the lowside (instead of pumping hot water thru the HX) and vapor charging with the lowstage refrigerant.
Surely that would get your charges right, although you dont really want to run water thru the lowside HX it was the first heat transfer fluid I could think of!
I still dont see an autocascade being overly difficult, although I usually overlook a thing or 50 ;)
]JR[
yeah, i knew anegma would mention the water thing, and he did. We both asumed you would mention it to:D :D .
the reason i say that, and in fact the reason i posted this, was because of all of the strange question and statements that all the beginers keep saying about cascades... like: I plan to use argon and 404a , and expect to see -130c. just an example. so lets keep water out of the picture as far as this goes for now.
its a little different... the only gases i can afford are R22 and R23 beacause both are cheap.
I expect it to work, thats all...
Ok, first the pic...
Nah the water point is just to get the charge right in the system, not a coolant for the condensor or anything. If I were to go for it. edit: to make the system into a single stage first, thus not trying to balance a multivariable equation.
I would likely use R290/C02 to start since ive got both of them, and maybe some ethylene if I can aquire some from work.
My biggest problem though is compressors since the only ones i can get are pifflingly small fridge efforts atm...
]JR[
What is everything for in the system... basicly i dont have to explain anything to you guys exept why is everything placed like that...
1. the filter is placed there so it filters R22 and R23 vapour, and its uninterrupted by anything. When placed after the condenser "bubles" of r23 would blow through R22 liquid interrupting the flow...
2. the soleneoid placed on the R23 line is there to seperate the R23 part of the heat exchanger (with the injector on the evaporator), this way i can seperate the R22 part of the system so its possible to charge the system according to SCT and SST and Garys magical values like a normal chiller.
I think i dont have to say that R22 is subcooled by the R22 returning from the HX and R23 is being subcooled in the suction line from the cpu evaporator.
Im thinking of making a kind of venturi system to increase the vacuum in the cpu evap (very slightly but there will be some effect) using the flow from the HX's R22 part...