View Full Version : First simple SS (In progress)
I34z1k
06-06-2007, 12:13 PM
Hi there people :)
I have been looking at venturing into phase for a few months now and finally, a reason came up to start one. I will be doing this as a school project. I have been reading up a bunch and asking around as much as I can, but since I live in a pretty sad country (South Africa) with little expertise, Johann is the only one "in the know" I can get a hold of.
So far I have got a hold of this 12k b.t.u compressor and got a capacitor to get this baby running. Its a r22 compressor :) pretty excited about this. I found some cap tube but its 2mm in diameter, would that suffice?
http://img238.imageshack.us/img238/6647/picture025rr8.jpg
http://img166.imageshack.us/img166/7258/picture026bp5.jpg
Any input will be appreciated :)
looks like a good start.
but you should get a captube that's longer and with smaller inner diameter. I would start with ~3meters of 0,7-0,8mm (0,028"- 0,031") captube. That should suit this unit good. what condenser is you going to use?
regards
Tim
I34z1k
06-06-2007, 12:23 PM
Dam. Will see if I can source thinner. At the moment still browsing condensers. Gotta look through little old fridges and broken air conditioners. Hehe :)
Btw, its low budget :P Got that comp + cap for like $20 equivalent.
krullet
06-06-2007, 02:11 PM
i now that several of the builders here at XS have their own inetstores, maybe u can order from them, they are really helpful.
u can have look here http://www.xtremesystems.org/forums/showthread.php?t=104455
and they are not too expensive..
Isn't Johann located in South Africa nowadays? Maybe he can help you with supplies.
wdrzal
06-06-2007, 04:04 PM
Post a lot of pictures and ask and get several replies before doing ,so you don't have to redo.:yepp:
that compressor I guessing came from a window air conditioner. is that correct or what did it come from?
did it have a capacitor? they can shock you even when unit is unplugged if they are charged.
look up matsus***a nomenclature(if I spell the name I get dancing banana's)....(tells what numbers in code represent) in those first set of numbers is the BTU and other important info. I'm not familiar with their nomenclature
[XC] 2long4u
06-06-2007, 05:03 PM
What is the difference from a lbp/mbp to a hbp pump? The danfoss NF11FX is a lbp/mbp and the rotary there is a hbp. Oh and I swear I saw your avatar blink at me.:eek: Do it again! :stick:
[XC] MarioMaster
06-06-2007, 07:57 PM
low boiling point vs high boiling point, rotaries are usually used in stuff like ac units where the evaporating temperature isn't very low
I34z1k
06-06-2007, 10:23 PM
i now that several of the builders here at XS have their own inetstores, maybe u can order from them, they are really helpful.
u can have look here http://www.xtremesystems.org/forums/showthread.php?t=104455
and they are not too expensive..
Brilliant :) Thanks
Isn't Johann located in South Africa nowadays? Maybe he can help you with supplies.
Yep said that in my first post. He is still waiting for alot of goodies to come into the country.
Post a lot of pictures and ask and get several replies before doing ,so you don't have to redo.:yepp:
that compressor I guessing came from a window air conditioner. is that correct or what did it come from?
did it have a capacitor? they can shock you even when unit is unplugged if they are charged.
look up matsus***a nomenclature(if I spell the name I get dancing banana's)....(tells what numbers in code represent) in those first set of numbers is the BTU and other important info. I'm not familiar with their nomenclature
Will do. Some kinda air con :P. I bought a capacitor for it :) Can't seem to find it :P? :rofl:
What is the difference from a lbp/mbp to a hbp pump? The danfoss NF11FX is a lbp/mbp and the rotary there is a hbp. Oh and I swear I saw your avatar blink at me.:eek: Do it again! :stick:
:| What?
[XC] 2long4u
06-06-2007, 10:34 PM
Blink.lol
MarioMaster;2236840']low boiling point vs high boiling point, rotaries are usually used in stuff like ac units where the evaporating temperature isn't very low
Yes I know that it is low medium and high. But what will using a hbp in a low application do? Is it ok to swap them?
{.bLanK} GoD
06-06-2007, 11:19 PM
At a guess I would say that running a low back pressure on a compressor designed for high back pressure, it wouldn't last too long.
[XC] 2long4u
06-07-2007, 12:03 AM
I take it back pressure is the low side?
I34z1k
06-07-2007, 01:51 AM
Ok and what does this mean to me? :P Not being mean, just lost :)
[XC] 2long4u
06-07-2007, 02:10 AM
The compressor you have is a HBP. The Ideal pump is the danfoss nf11fx, which is a LBP/MBP. Comprenda?
I34z1k
06-07-2007, 02:30 AM
Yea. Bad news is this is what I have and I don't have much of a choice. :(
well it will work!
you don't run the compressor 24/7.. and don't expect it to alst for 10 years så it will work.
I34z1k
06-07-2007, 04:51 AM
Great :D
Well so far my plans are to just get everything set up. Need to get some better cap tube, getting the drier soon. Piping is easy. Making a very simple and quite big evap for it atm :P Something a bit smaller than a softdrink can :P :D. Condenser seems to be an issue though. Will have to see what I can scrape up.
Major issue so far is leak testing, purging and gassing the system. Other than that I think I have most of the things worked out :)
you don't need to purge all brazing.. the evap is most important. If you are just going to brazing inlet/outlet of condenser you don't need to purge it.. and the other stuff is not really needing purge.
I34z1k
06-07-2007, 05:46 AM
Oooooo Ok. Gassing is the last issue then :). Anything I am missing?
johann
06-07-2007, 09:01 AM
Compressor looks cool, for a benching machine could rock some good temps, nice size for a cascade actually.
Unfortunately my shipment has been delayed until 26 June, all my tools and some spare parts (captube,Cpev's etc etc and some other small things are in there)
If you want to wait a while I can sort you out.
Clemmaster
06-07-2007, 09:17 AM
At a guess I would say that running a low back pressure on a compressor designed for high back pressure, it wouldn't last too long.
It doesn't perform the same at our working pressures too, compared to similar motor-size and same displacement LBP-designed compressor. A MBP/HBP compressor doesn't work well under low pressures, the COP is low and you loose most of the power it's able to developp... for nothing. Rotaries are a bit different as they are linear compressors, maybe a such difference doesn't occure but what's sure is that they won't last many years ^^
I34z1k
06-07-2007, 09:19 AM
Compressor looks cool, for a benching machine could rock some good temps, nice size for a cascade actually.
Unfortunately my shipment has been delayed until 26 June, all my tools and some spare parts (captube,Cpev's etc etc and some other small things are in there)
If you want to wait a while I can sort you out.
I will try do as much as I can but any help will be appreciated :P I will probably have to bug you with a few pm's/phone calls though if you don't mind :D
[XC] gomeler
06-07-2007, 09:49 AM
you don't need to purge all brazing.. the evap is most important. If you are just going to brazing inlet/outlet of condenser you don't need to purge it.. and the other stuff is not really needing purge.
But if you have purging gases available then go ahead and purge away, you won't regret eliminating the chances of a clog.
I34z1k
06-07-2007, 09:56 AM
:) Well I will try if I can :D
I34z1k
07-09-2007, 01:55 AM
Ok got some more stuff. Do I need schrader valves? And where would be the best place to get flexible suction line? I saw under-the-ice has but that is $60 after shipping :( More than I have spent so far.
Ssilencer
07-09-2007, 03:05 PM
you don't need to purge all brazing.. the evap is most important. If you are just going to brazing inlet/outlet of condenser you don't need to purge it.. and the other stuff is not really needing purge.
Try to not give this kind of wrong advices, any joint needs to be purged, period.
I34z1k
07-09-2007, 03:33 PM
Ah ok. But then what happens with the last joint?
Xeon th MG Pony
07-09-2007, 03:39 PM
you don't need to purge all brazing.. the evap is most important. If you are just going to brazing inlet/outlet of condenser you don't need to purge it.. and the other stuff is not really needing purge.
This is flat out patently wrong and disgustingly wrong advice to give to ANY one, it is people like that, that give the industry a bad name! <_<
ANY brazing must be purged, other wise your work is garbage!
Last joint is tricky, I open the other service port and set it for the ever lightest flow then do the last joint with out hassle.