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I was just looking at a vapor pressure chart for xenon, and I realized it's critical temperature is about 20 degrees celsius, yet it's boiling point at STP is -100 celsius. Ignoring the expense, would xenon be useful as a second stage refrigerant? Assuming you could get -30C from the first stage, xenon would condense at ~300 psi. Maybe an alternative to those who can't get restricted refrigerants (r1150, etc.) in small quantities?
Xenon Vapor Pressure Chart
10 Liters Xenon Cylinder
its a noble has so would likely have very low latent heat. but might be worth it.
Xenon latent heat of vapourisation:96kj/kg mol weight 131g/24litres (5.46kg/m3)
r1150 latent heat of vapourisation: 482.86 kJ/kg mol weight 28.g/24litres (1.17kg/m3)
xenon latent heat : 524kj/m3
r1150 latent heat: 563kj/m3
so actually its quite a good alternative when you take into account that its inert (so non flammable) and has a 4.5oC lower boiling point (-103.8 vs 108.2)
Is not easier to make a sealed vacuum chamber, put some of bulbs, crack them and suck xenon to bottle? Just curious :P
the bulbs cost way more though. proper xenon only bulbs cost several $ for only a couple of grammes. atleast this is ~1kg for $70 so not too bad. although its still well above R1150. also i dint think it will that easy to get outside the USA
That's the R1150 you're talking about right? :)Quote:
Originally Posted by Cossey
So R1150 is an expensive gas. :( Damn.
r1150 isn't a restricted refrigerant.Quote:
Originally Posted by js530
Don't blow yourself up.Quote:
Originally Posted by MeTsU
I'm sitting near a tank of it in my room...i try not to fart around it.
Ok, so R1150 is not only expensive, but also explosive...great... :)Quote:
Originally Posted by gclg2000
Na...I don't be doing anything with R1150 in the near future. I made a mistake, thinking I'd do R1150/R1270 mix for a 1HP unit. It would be my first too...anyway, I've learn from that in the what is the best copressor +gas? to get -65/-75c'??.
I thought someone was having trouble getting a cylinder of it from airgas?Quote:
Originally Posted by Unknown_road
i meant xenon, r1150 can be got from http://www.intergas.co.uk not sure about price but it comes in 3.4kg cylinders so shouldnt be too bad.Quote:
Originally Posted by MeTsU
that might be. But r1150 isn't seen as a refrigerant by most companies. And it isn't a global warming gas so normal refrigerant rules don't apply to itQuote:
Originally Posted by js530
That's the problem I have. No one local has ever heard of it.
its one of the "rare" gases that is only makes up a small % of air.its expensive compared to other gases but is used in industry and cryionic cooling. So the limited number of people who need it get it right from the producer.
You might be able to get it from a lab supplier. I know some labs do use it. I doubt it will be cheap though.
guys there is a whole range of refrigerants already available.It seems everyone isn't happy unless they mix something togeather. Every other question is "what if I mix ? with ?....Unless you are like chilly and have a lifetime of useing and understanding how the standard R value refrigerants work, your chances of mixing up somethig that works better is slim to none. I would say unless you are extremely experienced just stick to regular refrigerants.
My bigest worry is that guys are going to try mixing any gas they can get their hands on without understanding the compatability of it until someone makes a mistake and gets hurt.