Tripple digit cascade

**Charles Wirth** · 11-02-2003, 07:02 AM

I welcome you to come to vegas to measure it yourself, watch, feel, listen and ask questions at comdex.If you want to swap meters I can do but but I am not going out to buy another one because you dislike the reading it has from a cascade built by an retired HVAC engineer.

Maybe you might learn something from the engineer who built mine.

My PEV responds to the load quickly, cap tubes do not. You were running a cap tube right?

Gotta get back benching, came out to post new scores.

**captaincascade** · 11-02-2003, 07:11 AM

ok well, ill just go fire up one of my -150c revcos, stick my probe in and call it a super computer freezer, post the pic and ill be the coolest guy ever.

dude, the company i work for is called los angeles CASCADE. we're called that because thats all we do, cascade systems.im not claiming to know everything, but in my 10 years working on cascade systems (thats constantly everyday) i have never ever seen such a wonder as -107c useing 2 compressors with 95 in the second stage. i grew up with these freezers and know what im talking about. i can take your revco apart down to nothing and put it back together

im not tryin to be a jerk and its not sour grapes. just deal with it, your temp is wrong.

**Charles Wirth** · 11-02-2003, 07:23 AM

It probably is wrong. I thought we went over this.

I have a complete helium cryo setup

Maybe Ill turn on the baxter and let it get down to temp and lock a new probe inside when it gets down to -85c

**captaincascade** · 11-02-2003, 07:26 AM

my dad could beat up your dad.

**Charles Wirth** · 11-02-2003, 08:27 AM

Its ok mickey, I understand what he is saying. but I think my avatar is like a stick poking at him

It will be changed soon enough as I am sure you want to know what my block looks like.

**herefishy** · 11-02-2003, 08:57 AM

Originally posted by captaincascade
hey i stole yer idea with useing a hot plate.

anyone know how much heat 1 of these puts off, i think mines for a crock pot. i got it set up with a temp control set to 100c. do you think thats enough? will this be a good way to test?

I use a 160w condensate heater pan. I started up and tested my scratch project. The condensate heater pan was at 170degF, while I maintained a -45degF evaporator.

I've got pics of all the testing and the completed project. I think I'll get around to posting them, today (on another thread).

**Bra!nFreeZe^** · 11-02-2003, 10:05 AM

We want some pics of the system running!!

but thats REALLY some nice temps

**Xenogias** · 11-02-2003, 10:37 AM

yeah, is the system insulated well enough to leave on for long periods of time? We're all anxiously awaiting pics. I'm most curious about how its insulated considering all the problems people with dry ice have...and yours in colder.

**sandman** · 11-02-2003, 10:55 AM

Well, whatever temps it is, it's a damn nice system.

**Charles Wirth** · 11-02-2003, 11:30 AM

Very well insulated, the right hand sides of both compressors is cool, below ambiant.

No bubbles in sight glass, we charged first stage under full load.

**Jeff** · 11-02-2003, 11:41 AM

Originally posted by captaincascade
my dad could beat up your dad.

**captaincascade** · 11-02-2003, 12:45 PM

Originally posted by FUGGER
Its ok mickey, I understand what he is saying. but I think my avatar is like a stick poking at him

It will be changed soon enough as I am sure you want to know what my block looks like.

Thats about right. I dont care about your computer racing, though its nice it has a purpose and i hope my systems do what is expected. i race freezers, and this guys usin a broken stop watch. I dont mind competition, but itd be nice to see how much further i have to go, acuratly.

And cmon the "my dad could beat up your dad " comment was pretty funny.

**OPPAINTER** · 11-02-2003, 12:47 PM

captaincascade,

you need to go to XTW today with your Cascade rig. We need to try this Athlon 64 on it again.

OPP

**Gary Lloyd** · 11-02-2003, 07:20 PM

Captain, you're just having more fun than the law allows, aren't you?

I have family in your area (Lawson Refrigeration in Irvine). I'm tempted to run out there and join in the fun... LOL

**vlad** · 11-02-2003, 07:50 PM

"Sits in the dark watching & learning. he has found a home"

**DaBit** · 11-03-2003, 03:42 AM

Captain, I also doubt FUGGER's temp measurements, but based on the numbers he is able to come close if his evap is really good, and hist load in the 80-140W range.

-107C evap temp would mean at least -112C SST, especially at these low temps. At -112C, our low side pressure is about 0.18 bara (~5.5 inch Hg). With an SC12 running at 60Hz, this is a suction pressure which is possible. It can be compared with a prommie running at -52C. Hard, but not impossible.

Still, to maintain this, he would need to condense at about -40C, thus with his high stage maintaining at least -45C at load. Now, this is hard for an SC12.

Thus, IMHO it is possible (read: not impossible), though I expect real evap temperature to be around -95C .. -100C.

cmon FUGGER, give us some more details about the thing. High stage evaporating temp, pressures, etc.

One more question: how do you do the low stage refrigerant expansion?

**captaincascade** · 11-03-2003, 06:41 AM

-97 is the absolute coldest ive seen with a 2 stage r-95 system. That was on a revco i rebuilt, and that was on the thermocouple that leads to the inlet to the 2nd stage evap directly sodered to pipe. -93, -94 is the coldest ive ever seen box temp. calculations and disney charactors aside, i do realize im arguing a dead point. i don't like to consider myself god, more like one of his children just like you. only difference is i was sent here to die for your sins. A great pestalence will soon be upon you. Repent!
join me in my not understanding why people would not believe i know what im talking about.

I really work at radio shack, live in my moms basement, and collect baseball cards.

yes gary i am having to much fun. lol

cmon you know its pretty funny guys.:-)

**DaBit** · 11-03-2003, 07:53 AM

Originally posted by captaincascade
join me in my not understanding why people would not believe i know what im talking about.

No doubt about that.
Still, -100C *is* possible with R508b in our systems, so fugger might indeed run this low.

To put it differently: have you ever seen a commercial single-stage reciprocal compressor R404a system running below -45C? Many here do it.
[/QUOTE]

**Charles Wirth** · 11-03-2003, 10:14 AM

CC, I was told I am not running straight 508B in second stage.

No problem for my 15+ hours of benching this weekend. Both compressors run cool and the whole suction side was very cool (iced at one point till we adjusted the PEV)

From my limited experiance I can comprehend that using a cap tube on a cascade will not produce the capacity needed just the insane temp range to fire up (been there, done that)

I dont want to give too many specs out because if I am wrong you guys will run me into the ground and I do not need an extra orafice expansion at this time. Reggie (HVAC engineer) will be online soon and be able to answer questions and correct my mistakes.

Dabit, high side R507B not in vacuum, no bubbles in sight glass. Low side PEV on the Evap head feeding a custom made distributor inside the evap head. Center pressure point retention mech for NO board warpage. four corners are not used. (gotta love a big C clamp)

You seen the base of my block in my avatar.

**captaincascade** · 11-03-2003, 10:46 AM

how can you see if there is bubbles in the sight glass? isn't it frozen?

are you useing a sporlan zz txv?

oh, and hey op, how far does my temp warm up on a load like -78c max? somethin like that. i had to rev it down so he could overclock the amd64. i was just bypassin a bit from high to low like a capacity control.

its not possible with those compressors, can you give me that?

**Charles Wirth** · 11-03-2003, 10:55 AM

It is possible to break away ice layer from the sight glass on first stage at any time. The second stage is under insulation and can be pulled back to expose. Do you need pictures.

I am a newb to know how far these compressors will go, but I do know they are operating very nicely.

**captaincascade** · 11-03-2003, 11:03 AM

picture a wave of electicity..... up and down ....up and down....
just a wavey line ok

now what the run cap does is creates another wave that doesnt go down and up as much and kinda keeps it uh .... not so wavey

it just kinda sorta uh,,, makes it more dc than ac i wanna say kinda...... less amps to make the waves,,, get it?

hey you removed your "how does a run cap question"?

**Charles Wirth** · 11-03-2003, 11:08 AM

I offered for you to come look at it early, could have saved some bandwidth and aggravatoin if you took me up on my offer. I even offered you $100 towards gas /shrug

oh well, lets see what yours can do. Eric wants to drive and Im cool with that.

**captaincascade** · 11-03-2003, 11:18 AM

we're doin what now?

did you understand the run cap?

**Hobocrow** · 11-03-2003, 11:23 AM

Hey Guys, this is becoming sorta like, well, a food fight....Fugger, I'd like to come look at it for free! I could use a road trip!

Thread: Tripple digit cascade

Thread Tools

Search Thread

Rate This Thread

Display

Bookmarks

Bookmarks

Posting Permissions