Some Cascade Parts need input

[Ozzfest05]

Ok so I will be buying some parts for a future project so I dont have to blow all the money in one shot

I was thinking about getting a pair of these compressors for the cascade build.
http://cgi.ebay.ca/TECUMSEH-3-4hp-REFRIGERATION-COMPRESSOR-HGA9468ZXA_W0QQitemZ260336457613QQcmdZViewItemQQpt ZBI_HVAC?hash=item260336457613&_trksid=p3286.c0.m14&_trkparms=72%3A1215%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318

And this HX
http://cgi.ebay.ca/25-Plate-Stainless-Steel-Copper-Brazed-Heat-Exchanger_W0QQitemZ270326857551QQihZ017QQcategoryZ 3240QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l 1262


Basically this wont be happening for a while but I figure I might aswell get he bigger parts first and get some of the cost out of the way as for a condenser I have many in mind I will post up which parts I end up choosing

[s0lid]

3/4HP Rotaries, can't be underpowered for an cascade :up:
I'd just wish i could run into that kinda deals :( Everything related to vapor phase change is soooo expensive.

[sdumper]

Ok so I will be buying some parts for a future project so I dont have to blow all the money in one shot

I was thinking about getting a pair of these compressors for the cascade build.
http://cgi.ebay.ca/TECUMSEH-3-4hp-REFRIGERATION-COMPRESSOR-HGA9468ZXA_W0QQitemZ260336457613QQcmdZViewItemQQpt ZBI_HVAC?hash=item260336457613&_trksid=p3286.c0.m14&_trkparms=72%3A1215%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318

And this HX
http://cgi.ebay.ca/25-Plate-Stainless-Steel-Copper-Brazed-Heat-Exchanger_W0QQitemZ270326857551QQihZ017QQcategoryZ 3240QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l 1262


Basically this wont be happening for a while but I figure I might aswell get he bigger parts first and get some of the cost out of the way as for a condenser I have many in mind I will post up which parts I end up choosing

That is so cheap!!

Great deal!

[Ozzfest05]

@ Solid im pretty sure ive seen some people using 3/4hp on their cascades just fine I might be mistaken, I might grab a condenser from Detroit AC
http://cgi.ebay.ca/Condenser-for-Refrigeration-Phase-Change-CPU-Cooling_W0QQitemZ330295449979QQihZ014QQcategoryZ13 1503QQtcZphotoQQcmdZViewItem
And I will have a second condenser which will be larger maybe me and Ruffus can Fab one OUT yes Ruffus I definetely need your help.I expect all the parts to be ready withing the next couple months once I finish with all my orders

Why cant I find condensers like these in north america
http://www.kaeltetechnik-shop.at/index.php?k=132&lang=eng

[n00b 0f l337]

As good a deal as those rotaries are, they run insanely hot, and are some of the loudest roto's I have EVER heard.
Your going to need a much larger condenser.

[Ozzfest05]

Noob I was planning on using two condensers one of which being something like http://www.kaeltetechnik-shop.at/Verfluessiger-1140270F00-121kW_1

but I really need to look at what ruffus is able to make up he might have something that will work

[[XC] gomeler]

You can also run two of DetroitAC's condensers in parallel to get the capacity you'd need with a 3/4hp-1hp compressor. There are 10-plate HXs available on eBay for ~70% of the cost of that 25-plate and they'll function just as effectively.

Regarding compressor sizing, it all depends on your goals. Those compressors would be sufficient I'd say as I have a similar cascade regarding BTU rating on compressors and it functions just fine. Definitely need a large condenser on the 1st stage though, I started with one of DetroitAC's condensers and hit capacity issues immediately, two cleared it up though :up:

[Ozzfest05]

thats Gom I was hoping you would post some advice what rating are the detroit AC condensers
and I thought the 25 plate would perform better then 10 but yeah if not then I will buy a 10 plate

[Ozzfest05]

So gom something like this I could get away with http://cgi.ebay.ca/10-Plate-Brazed-Heat-Exchanger-Home-Heating-Boiler_W0QQitemZ260343009581QQihZ016QQcategoryZ166 665QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1 262

the dimensions would all work correct this would be sufficient hell I could buy two of these for the same price as one of the other almost

[Gunslinger]

So gom something like this I could get away with http://cgi.ebay.ca/10-Plate-Brazed-Heat-Exchanger-Home-Heating-Boiler_W0QQitemZ260343009581QQihZ016QQcategoryZ166 665QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1 262

the dimensions would all work correct this would be sufficient hell I could buy two of these for the same price as one of the other almost


Man, that place is 20 minutes from my house.

[[XC] gomeler]

Yup, those 10 plate HXs will work just fine. The 10-plate has a 1 to 5kW capacity with a delta of 45F between the hot and low sides. As for DetroitAC's condensers, I wish he had a huge stockpile, I like them as you can treat them more or less like modular components :up:

[teyber]

gomeler;3601197']You can also run two of DetroitAC's condensers in parallel to get the capacity you'd need with a 3/4hp-1hp compressor. There are 10-plate HXs available on eBay for ~70% of the cost of that 25-plate and they'll function just as effectively.

Regarding compressor sizing, it all depends on your goals. Those compressors would be sufficient I'd say as I have a similar cascade regarding BTU rating on compressors and it functions just fine. Definitely need a large condenser on the 1st stage though, I started with one of DetroitAC's condensers and hit capacity issues immediately, two cleared it up though :up:

runmc used 2 of those and it didn't work so well for him :shrug:

best place to get a cascade condenser is chilly1 IMO... hes got a lot without shroud or fan for cheap.

get a 10 plate heat exchanger, or a 15 if you want to splurge.

id use 2 10k + btu rotary compressors on this

or 2 sc18clx.2's

[Ozzfest05]

I heard the sc18s dont work so good on cascades?

[[XC] gomeler]

Don't see why they wouldn't, work perfectly fine as a large single-stage :up:

[Ozzfest05]

ok so im thinking of a set up like this for my cascade still going through planning stages but so far I like this layout
http://img242.imageshack.us/img242/4821/mini7xadx1.jpg

[Ozzfest05]

about to buy some accumulators and would like to know if 355 psi test pressure is good enough for running R1150???

here it is http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=400005535235&ssPageName=ADME:X:AAQ:US:1123

[teyber]

the low side won't reach 355psig, that will work great. look around you can snag that for under half that price

[n00b 0f l337]

It's about static Teyber; some systems could have a static that high.

[teyber]

It's about static Teyber; some systems could have a static that high.

i know its about static, im saying with that accumulator which i am pretty positive is a lot bigger then what the European guys are using, i doubt the static would be that high unless you really don't know what your doing

[n00b 0f l337]

It can happen, especially if the liquid line is overly large.
But those tanks should do.

[[XC] gomeler]

Like NoL said, if your liquid line post-HX is overly large you can get insane statics. Made that mistake on my first cascade, not ever again :up:

[Ozzfest05]

but the accumulator should work as long as long as we dont make a mistake and over charge correct
I will be ordering these soon so if they will work then great if not ill keep looking

[teyber]

noob of 1337 used these (er, 99% sure) on sdumpers cascade and seemed to work well.