M1 to a cc Hmm

[WindStorm]

Toying around with this and is it possible’ also I have extra Dan Foss comp laying around I have outline how I was going to proceed with this give me your thoughts good or bad. A possible suggestion for ref gas for second stage for this under power compressor with a mix to keep head pressure down with a good temp. :)

[gkiing]

that diagram is a bit confusing as to where the tubing runs.. maybe you could do a 2d layout.

[WindStorm]

Try this

[blinky]

yah looks good man

[WindStorm]

Just making sure I had right ideal of how to put this together still need advice on gas for second stage and if the compressor is big enough for this. I guess depending on what referents was used and the mix / also high side pressure it will produce. Trying to stay with lower flash point gas if possible

[WindStorm]

Has anyone experimented with argon R740/R134a 60/40 mix? Guessing this would give me boiling point somewhere around -90 to -110 correct me if I wrong looking for answers. Would you have to go to 3 stages to get to this step with small compressors

[Epsilon]

The design is allmost right

You will need some more parts. A second filter/dryer (2 stages means 2 filters!) is needed

safety equipment

further more, the HX is much to small, you will need much more insulation on that one.

[gkiing]

Yeah.. looks like a good start for a classic cascade. You will want to add a high pressure cutout on the low stage, and/or a temperature controller that wont let the 10fx start unless the hx is below a certain temp.

I believe berkut tried the argon/134a mixture a while ago and it is just a myth.. you need significantly lower temperatures for the argon portion to condense properly.

[WindStorm]

I will use relay and temp sw keep system off till max temp is reach by first stage still looking for alternative gas that will work. R23 / ethane would be great but to much expense looking for good alternative’s O well still learning I will install two small inline dryers to keep moisture out the HX / Subcooler is commercial one for about 40 us dollars each should do the trick

[blinky]

dont forget to make an oil seperator, and oil return valve on the low stage

[WindStorm]

Are you talking about between the HX and .028 cap on the high side return back to compressor to keep oil out of the evaporator for better cooling explain please so I have a better ideal and were on same page. Will the HX collect this much oil and stare the compressor or is it to keep cap tube from clogging up

[blinky]

Are you talking about between the HX and .028 cap on the high side return back to compressor to keep oil out of the evaporator for better cooling explain please so I have a better ideal and were on same page. Will the HX collect this much oil and stare the compressor or is it to keep cap tube from clogging up on the low stage, you want an oil seperator on the high side right before the refrigerant goes into the interstage HX, the oil will freeze below -50c or so (someone correct me on this number), so you dont want it going through your cap tube or evap or it will clog

[WindStorm]

Ok that’s what I didn’t know. Thanks that good to know saves a lot problems down road on building this.

[WindStorm]

Ok found a gas for second stage 508b good for -88 bp non flammable it looks like it will run lower temp and less high side pressure then R23 at a lower cost. Hopefully .028 cap / small compressor will work.

[gkiing]

How much is r508b/lb in your area?

[WindStorm]

R507 are 244.00 us 25 pound can. But I have access for small amounts for free but R508b I will have to buy and seem very hard to find call three locations today in Dallas ft worth area with no luck I will try tomorrow someone in this area should carry it

[WindStorm]

I am having trouble trying to find a small commercial oil separator to use I can always build one if you know a outlet for this it would save me some time

[chilly1]

I am having trouble trying to find a small commercial oil separator to use I can always build one if you know a outlet for this it would save me some time
Where are you? The AC&R or henery 5180 is small enough to gif in a prommie sized case.

[WindStorm]

Springtown just outside of ft worth Texas. who is AC&R AND Chilly1 do you have home made oil seprator you wold like to sale and are you located in US.

[chilly1]

Naw I don't use homemade OOil seperators. The henery (AC&R) is cheap enough and it has a float and works automatically.

[WindStorm]

Did a search for AC&R thanks Chilly I found the oil separators and this will work. Just got off phone from united refrigeration R508b is whopping 640.00 us 5 pounds container R23 is close to same price. Hmm wish the could find a way to use argon mix to a workable boiling point for second stage gas time to do some more research

[WindStorm]

Here is the possible gasses for second stage that I can see and trying rule out flambé gasses verse the cost of referent verse the high head pressure that some of referent can cause there a back lash on some of these. One way or the other. Still have some out lets I have call a guy in Arlington he has 508b in stock and he can charge my system for small fee or ck with my buddies for possible R503 on their truck but here is list what I can find and very much open for suggestions

[JSU]

um that argon thing has been proven to be a myth, do a search ;) . You are trying to make one fit in a prommy case? btw chilly1 can hook you up with the henry 5180 ;) drop him a pm.

[i_like_penguins]

I did not know that you could use nitrous oxide as a refrigerant. Looks like it could be colder than CO2. Dunno on the tripple point though. If it is anything like CO2 it could suck to work with. What would be the condensation pressure on it? Probably suitable as a second stage gas only. Good Luck.

[runmc]

Here is the possible gasses for second stage that I can see and trying rule out flambé gasses verse the cost of referent verse the high head pressure that some of referent can cause there a back lash on some of these. One way or the other. Still have some out lets I have call a guy in Arlington he has 508b in stock and he can charge my system for small fee or ck with my buddies for possible R503 on their truck but here is list what I can find and very much open for suggestions

Who did you talk to in Arlington with 508b?? :)

[WindStorm]

Pm me i will send you his number