for teh :banana: :banana: :banana: :banana: :banana:es!Quote:
Originally posted by chilly1
Making money though...
Printable View
for teh :banana: :banana: :banana: :banana: :banana:es!Quote:
Originally posted by chilly1
Making money though...
chilly1,
Have you decided on what gases/refrigerants you're going to use in each stage yet?
Just trying to decide myself on what to use in mine, and haven't seen any results from anyone using Methane in the final low stage(s).(Yes, I Know It will be Very Hard to Condense and pressures will be high.)
Didn't you tell me you were going to use it or Have known of someone that has used it?:cool:
Love to see the results pcice :)
pc ice
If I'm not mistaken, Methane has a critical point of -82.7c, so it must be below this temperature to condense.
But even at that temperature it would still need to be at nearly 500psi to condense.
I'm Thinking that the HX for the third stage would have to be at about -125C in order for the pressures of the methane to be safe.
Am I Wrong?
Said it b4, but wont hurt to say it again :)
Be extra careful with the brazing on your home made oil seperator ice.....hp methane + steel wool + rupture could mean :explode:
Probably argon/methane system is complete but I need to configure an evap for the two refrigerants as well as a phase seperator/condenser. I may have collapsed by plate HX with the discharge pressure when I tested it. (600 psig) we shall see... I have a three cascades to complete first.Quote:
Originally posted by hallowen
chilly1,
Have you decided on what gases/refrigerants you're going to use in each stage yet?
Just trying to decide myself on what to use in mine, and haven't seen any results from anyone using Methane in the final low stage(s).(Yes, I Know It will be Very Hard to Condense and pressures will be high.)
Didn't you tell me you were going to use it or Have known of someone that has used it?:cool:
I am bailing on passive oil seperators and going with heilical seperatores Henery S-5180 I will use 1 on second and two on third stage with a back flow trap after the last seperator.Quote:
Originally posted by froudeg
Said it b4, but wont hurt to say it again :)
Be extra careful with the brazing on your home made oil seperator ice.....hp methane + steel wool + rupture could mean :explode:
what about blending the ethylene with the methane to lower the head pressure?
at what pressure should the methane be at -125ºC?
Doesn't work like that...
It would be an under statement if I said it looks great!
It’s hard to read this whole thread at work. I just spent 1hr doing nothing but reading this thread.
extremecovette are those your cars, or just your dream cars....
:eek: :slobber:
Quote:
Originally posted by pc ice
yeah i know..and i plan on using copper wool.
Critical temperature : -82.7 °C
Critical pressure : 45.96 bar.
i beleve a 45.96 bar is equal to 666 psi. please correct me if im wrong.
and yes -125c would be the sweet spot..
so even if i have to go 4 stage's the 3rd can use r50 and r1150 and r290 to hit -125c to hold the 4th strong..and condence the r50 to liqiud and reach it's full boiling point.
Methane, refridgeration gas of the devil.
the ethylene wont mix with methane?Quote:
Originally posted by chilly1
Doesn't work like that...
how do we make it workQuote:
Originally posted by chilly1
Doesn't work like that...
lolQuote:
Originally posted by bh2k
Methane, refridgeration gas of the devil.
:explode:
actually the methane and ethlyene mix may or may not decrease the condensing temperature of the methane it depends on how the blend works, Now if you have an autocascading condenser then that is another story.
man, xtremecorvette had better hide himself from me if those were his cars :P
i dunno, wouldn't argon be another good gas for this stage?, i mean it has a much lower boiling point than methane ( and prob much higher pressure) but if u could blend it with some really low gas(chilly 1, u said maybe it would be around 513 psi?) i dunno, thats lower than wat pc ice said of methane,
if u were to deal with such high pressure, how powerful would ur compressor have to be?, just surfing on ebay, i see some really big compressor, http://cgi.ebay.com/ws/eBayISAPI.dll...829622481&rd=1
that's just an example, but i mean, wouldn't the 3rd stage compressor be pretty big
I ran it with argon only with no condenser cooling to see what would happen. the pressure was 500+ psi.
:eek:
500+psi with Just the Argon?
Man!, be carefull chilly1,
I want you to Finish the Cascade, not the other way around!:D
The compressors max pressure at bypass is 500 psi.
Won't that damage the compressor?
I remember runmc's Cascade went to almost 500psi with the ethylene when he started the second stage with his HX at 0C which opened the bypass in his compressor.
luckly, It caused no permanent damage (To the compressor, His heart rate went up cosiderably for a moment!LOL!)
Are you going to get a chance to test a ethylene/methane blend or try with argon/methane?
There are some HC mixes... Like 170/290 6%/94%
Do some 410A on a 110F+ roof... you'll see some 450psig+ pressures.
You haven't been to Las Vegas. R410 on a hot roof ambient 112 roof temp 138 discharge temp of teh R410 system 168F We have had some burst pipes in condensers. 600 psi plus and these systems keep on plugging.
The third stage is charged with 50/50 argon methane.
Only condensor tubing bursting we see around here is when the high pressure control was jumped out by some bone brain. Because he couldn't tell that the Valve was starving and over charged the system.
Oh ya we've got alot of those kinda guys up here.
Is that mixing? Wouldn't think a Noble gas and a HC would mix. Or is this a Auto-C?