Single Stage Rotary :banana::banana::banana::banana: shots (21 or older please)

[runmc]

Wait if its inside the suction and bottom feeding then how are you sucking out?

I tried something similar a year or so ago where I ran my cap through the suction and then wrapped it around the spiral so that it fed out the top and then twisted down the spiral to suck out the bottom.

Load temps for me where not good and I removed the evap and did straight plumbing...

Is this what you did?

No

[sdumper]

No

Hmmm now im confused but what else is new I stay confused

[sdumper]

Did you go back to the old Chilly1 design ( http://www.xtremesystems.org/forums/...74&postcount=1 ) where it ran the cap to the bottom and you drilled a horizontal hole at the top? Or maybe you modified an existing Chilly1 like this?

[runmc]

The suction hole is 5/16 . drill down about half way with a 3/8 bit. Then take a 5/16 cap and drill a hole in it for your cap tube. Braze the cap tube to the cap and the insert the cap right below your exit holes at the top. Then stick a 3/8 suction tube in being careful not to plug the exit holes. The cap you stick down in the hole will need to be really snug. This wasn't very easy

[[XC] gomeler]

So you reversed the refrigerant flow in the Chilly1 spiral? Any chance of a comparison between it and the typical flow?

[sdumper]

The suction hole is 5/16 . drill down about half way with a 3/8 bit. Then take a 5/16 cap and drill a hole in it for your cap tube. Braze the cap tube to the cap and the insert the cap right below your exit holes at the top. Then stick a 3/8 suction tube in being careful not to plug the exit holes. The cap you stick down in the hole will need to be really snug. This wasn't very easy

Thats what I suspected you were doing. If it works better then can you order some non drilled evaps on your next order and let us drill like the old days?

I also thought Jin did some comparative testing and found the results were the same?



As a possible alternative:
I was thinking take a normal stub braze it closed at the end. Slide it into place, then drill a cross sectional suction hole horizontally at the top, then drill a hole along the side and slide the cap all the way to the bottom. I think it would be easier...

[runmc]

So you reversed the refrigerant flow in the Chilly1 spiral? Any chance of a comparison between it and the typical flow?

This was an old evap I had made up a while back. I don't see it making much difference but every little bit helps in this game. It's a lot easier and faster to do it the other say so I never did this again.
Reverse flow is right. Spray is shooting right straight down on the face of the evaporator. Might be a better way.

[sdumper]

Hows it working? Is it any better or worse than the simple method?

[runmc]

I put it under load today and of course the bottom fell out. I had to double the charge to get it to hold my normal load I use for tweaking. After all was said and done, this Single Stage hold about the same as the 18cc Danfoss.
Cap tube seems way to restrictive. I think it must be 031. I will probably start off by shortening the cap tube that is on it.
So Scott - it's the same old song - "Rotary tweaking Blues"

[lesstutrey]

almost glad it doesn't pwn the 18cc unit you made me Very nice work ron, but that seems to be the norm from you

[runmc]

almost glad it doesn't pwn the 18cc unit you made me Very nice work ron, but that seems to be the norm from you

Actually IMO the Danfoss cooler turned out better. They hold the load at a more stable temp and they are half as hot and half as noisy.
I need to work more with the rotary cap tube size and length. Hopefully better results to come.

[dinos22]

wow CRAZY man

[EnJoY]

I want...

[Yellowbeard]

Very clean work there Ron

After having seen SDumper and Gomeler's work up close, I have a new appreciation for how difficult some of this work is.

[sdumper]

I put it under load today and of course the bottom fell out. I had to double the charge to get it to hold my normal load I use for tweaking. After all was said and done, this Single Stage hold about the same as the 18cc Danfoss.
Cap tube seems way to restrictive. I think it must be 031. I will probably start off by shortening the cap tube that is on it.
So Scott - it's the same old song - "Rotary tweaking Blues"

Man I hate single stage Rotaries...I have tried 3 Rotaries in SS units and they all were a pain to tune, loud, hot and for me never seemed reliable under load.

Luckily I have a bunch of Danfoss SC18's left to work with in my garage.

The one good think about rotaries is they are great in cascades...

[n00b 0f l337]

It's really about proper superheat is all with rotaries, once you get it down they're not so bad and have some good attributes.

[piotres]

I guess You have low ambient temperature in workshop ?

[runmc]

I guess You have low ambient temperature in workshop ?

hehehe

[miahallen]

Nice work Ron

[baker18]

Looks very nice Ron. Been a long time. I see you still at it. Rotaries are the best for ss benching not for day to day use(too loud).

[runmc]

Looks very nice Ron. Been a long time. I see you still at it. Rotaries are the best for ss benching not for day to day use(too loud).

Sure is good to see you here.

[kayl]

Looks very nice Ron. Been a long time. I see you still at it. Rotaries are the best for ss benching not for day to day use(too loud).

and perfect for cascades Good to see you around baker18 been alot time since i have seen posting