Autocascade Drawings

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Originally Posted by LukeXE

I would start new competition on 1 of April and end on 1 of September. 6 months of fun :p I must talk about that with Jinu and Runmc.

Of course, CO2 will be ! It must !

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only problem is with each autocascade compertition only a handful enter and only 1-3 actually get them working and holding load:mad:
We should have our first cascade comp using small compressors.
couple 1/3hp units or 1/2hp and tune to 250w ;)
Specially with quad core cpus, and 8 cores around the corner

also if we look at even the single stage comp, baxz is the only one with a finished entry,little sad really.

I would love to try a standard 2 stage cascade competition as I plan on building a unit around two 1/3HP Embraco compressors, everyone says it can't be done but I want to give it a shot. Another AutoC competition would be fun though but considerably more difficult, I'm going to experiment with an AutoC next month. Learned a lot from reading this thread, keep talking guys :)

edit: CO2 as the 2nd stage gas would be perfect also as I can't even find a supplier of R1150 in Atlanta, all the places say they haven't stocked it in years :(

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Originally Posted by gomeler

I would love to try a standard 2 stage cascade competition as I plan on building a unit around two 1/3HP Embraco compressors, everyone says it can't be done but I want to give it a shot. Another AutoC competition would be fun though but considerably more difficult, I'm going to experiment with an AutoC next month. Learned a lot from reading this thread, keep talking guys :)

edit: CO2 as the 2nd stage gas would be perfect also as I can't even find a supplier of R1150 in Atlanta, all the places say they haven't stocked it in years :(

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Air gas has R1150 and they have a place outside atlanta I think...
Order a small bottle.
I have a working -105C cascade at 265 watts cooling that is using two 1/3 hp tecumsehs I have also a working cascade at 200 watts at -90c made with two 1/4 hp compressors. IT is all in the tuning... the HX has to be perfect and you cant use a captube of it will not tolerate large fluxuations in load.
I am working on a 24Vac controller for an electronic TXV for cascade use... this will allow you to have a fully adjustable first and second stage.. tune on the fly ..

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Originally Posted by chilly1

Air gas has R1150 and they have a place outside atlanta I think...
Order a small bottle.
I have a working -105C cascade at 265 watts cooling that is using two 1/3 hp tecumsehs I have also a working cascade at 200 watts at -90c made with two 1/4 hp compressors. IT is all in the tuning... the HX has to be perfect and you cant use a captube of it will not tolerate large fluxuations in load.
I am working on a 24Vac controller for an electronic TXV for cascade use... this will allow you to have a fully adjustable first and second stage.. tune on the fly ..

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O forgot to mention th -105C is a factory unit used to dehumidify air ina process machine.. however teh chamber works fine to chill alchol to -90c and at 3 liters it takes about 2 hours to get there.

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Originally Posted by chilly1

Air gas has R1150 and they have a place outside atlanta I think...
Order a small bottle.
I have a working -105C cascade at 265 watts cooling that is using two 1/3 hp tecumsehs I have also a working cascade at 200 watts at -90c made with two 1/4 hp compressors. IT is all in the tuning... the HX has to be perfect and you cant use a captube of it will not tolerate large fluxuations in load.
I am working on a 24Vac controller for an electronic TXV for cascade use... this will allow you to have a fully adjustable first and second stage.. tune on the fly ..

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I'll have to continue my search, I've only checked 2 distributors within the perimeter. That eletronic TXV sounds like fun but sounds expensive, I'll have to stick with more common metering devices. Thanks for the heads up!

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Originally Posted by SoddemFX

Jurgen,

If you use KJ/Kg and use with suction gas density (Kg/m^3) then it's the same thing as you're saying (KJ/m^3) well you used litre but still same thing. Like you said it's the units the data is actually usefull in as a very simple refrigerant comparison, NoL asked about latent heat of vapourisation (KJ/Kg) not the net effect :)

Tom

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I know but lot's of people here say "refrigerant A has a latent heat of 200 kJ/kg and refrigerant B has a latent heat of 100kJ/kg so refrigerant A is better" As long as density isn't taken into consideration kJ/kg doesn't say anything about how the substance will work as a refrigerant. I know that you know this but since lots of people don't I mentioned it for clarity ;) (and because I'm a pain in the *ss probably :lol: )

Does anyone know a number or preferably an email to get a quote from Air Gas or Air Liquide for r1150 in small quantities? (Preferably less then 20 pounds)