Latest evap/res

[Gary Lloyd]

Thought you guys might like a peek at my latest evap/res design.

http://www.gatecom.com/~tmethod/evapres4.jpg

[bh2k]

That's very sex :D

[Silver]

That explains alot. Thanks, I mean it. Now if I could get a look inside.........

[Gary Lloyd]

Here's what it looks like installed and insulated. Next comes the testing.

http://www.gatecom.com/~tmethod/evap4a.jpg

[S_I_N]

nice looks like a big change from the one in #3

[Gary Lloyd]

Yes, the efficiency should be similar, but the res is about 1/2 the size of #3, for an even faster pulldown. Also, I'm trying to get everything moved to the left side to make room for a pump.

[pythagoras]

Where the plate heat exchangers proving to expensive? As I assume that one is a tube affair.

Regards

John.

[S_I_N]

sweet a pump down there will make it alot easier to prime and fill the system. Took me almost 30mins of trying to persuade the denatured alcohol into the pump to get this one going.

[kayl]

very, very nice garry, this defiantly explains the high performance to you systems, so well done


:bounces:

[Charles Wirth]

Awesome gary, it seems you are mastering the water chiller and heat exchanger designs. That last chiller was very nice too.

[Gary Lloyd]

Thanks, guys. :D

[blinky]

awesome gary, is that a pipe in tube HX? it looks like the refrigerant goes through the pipe, and then water is pumped from the top of the evap/res to the bottom and out right?

i soo... wanna buy one of these
but i gotta get my HX installed first

[afireinside]

^^he said there brazed plate HX's.

When will you start selling em Gary :D

That deffinatly is better than my 1 gallon cooler with 20' coil in it HX :p:

[Gary Lloyd]

I'm not telling what's inside. Let's just say there is an enormous amount of research and experimentation inside. It is nothing so simple as tube in tube. There is a combination of strategies, with both series and parallel flow, and a lot of surface area. :D

[Poki]

It seems to me you're having alot of fun engineering these and it shows in the quality.
Did you get a rig together for testing these? I knew one was in the works but haven't noticed if it had cometogether yet.

[Gary Lloyd]

Not yet. It is on the todo list. :D

[afireinside]

Common Gary you have had it for a while. Your almost as lazy as me it seems :p:

[Speed_Mechanic]

What liquid pump are you thinking about using?

[Gary Lloyd]

I sell these without a pump. Just making a spot for one. I figure the people who buy these will most likely already have a WC system and a pump.

I have been considering autocascading one of these, but I'm not sure what pump could take the temps. Chilly1 has been testing the Taco 006. Perhaps that would handle it.

[saratoga]

What kind of temps would you expect in a cascaded system should you decided to make one?

[Redwolf]

Very nice.. at first I thought that barrel was tiny till I saw the second pic.

Auto-C a rotory? Don't the Auto-C units run a higher discharge temp?.
Thought about 2 staging a 1/2 and 1/4hp just to see if it'd work. But with the oil and motor being cooled by Discharge gas. Not so sure they'd last long. Never knew that till I cut one open the other day.

On that Taco 006. Says Min temp is 40F. Wonder if the contraction starts to unbalance it.

[Gary Lloyd]

Originally posted by saratoga
What kind of temps would you expect in a cascaded system should you decided to make one?

I'll find out if/when I get there. A measurement beats a calculation every time.

[Gary Lloyd]

Originally posted by Redwolf
Very nice.. at first I thought that barrel was tiny till I saw the second pic.

Auto-C a rotory? Don't the Auto-C units run a higher discharge temp?.
Thought about 2 staging a 1/2 and 1/4hp just to see if it'd work. But with the oil and motor being cooled by Discharge gas. Not so sure they'd last long. Never knew that till I cut one open the other day.

On that Taco 006. Says Min temp is 40F. Wonder if the contraction starts to unbalance it.

The chiller barrel is 9" tall and 2" diameter.

The compressor temp could be a problem, although rotaries can run very hot. In any case, I'll take steps to resolve this if/when needed.

[Poki]

The Taco pump might be able to survive low temps for a while. It says it doesn't use a mechanical seal so that's half the battle depending on what the seal is made of. The replacable cartrige sounds interesting provided the replacement is somewhat inexpensive.

[blinky]

how woulld this autocascade involve a pump? im lost

with the mention of autocascade i had a thought. Since these ACs are meant for such a high heatload, could we use some of the coolant comin out of a HX or ur evap/res to instead of going to the comp go back and use a tube in tube for the condenser, and chill the condenser with the chilled water. cuz if these things are tuned for 400 watts, and ur comp uses 200w at max, then u could use the other 200 or so to condense ur refrigerant. also if ur condensing at lower temps could we then use a refrigerant that condenses at lower than ambient temps, like r410a does in a prommy, this would maybe help the chiller hit -45c to -50c

im a hvac noob

[kayl]

blinky
water pump to pump the water from the auto cascade chillier to water blocks.


when you start you auto cascading gary good luck.
isnt there only 2 or 3 people in this forum that have completed a working auto cascade, i dont think no one has done a chillier though have they.
a auto cascading chillier with that new res design you have there gary now that would really be something.

[JSU]

wow gary.... if i did my calculations correctly tht mens that that cylinder is less than 1/2 a gallon (.43) + all the pipes and stuff in there......... good job!!!

[qberrt95]

Any updates :)

[JSU]

:with:

[Gary Lloyd]

As the evap/res gets smaller, it gets more difficult to maintain heat transfer efficiency. This design doesn't meet my standards, so I am trying some new designs. Back to the drawing boards.

I am determined to shrink the evap/res without sacrificing efficiency. If it doesn't kick butt, it doesn't go out the door.

In the meantime, I need to get caught up on my other chores, so it may be a while before chiller #4 is completed.

[saratoga]

What i would try would be to coil two pairs of 1/4 inch tube into two intertwined double helix shapes. Since area increases with r^2 and surface area with r, the 2 coils would have 2x the surface area and the same volume as a regular coil of 1/2 inch pipe.

Of course what you have now may already be more sophistricated then that.

[Gary Lloyd]

Yep, I've gone way beyond that, using a mixture of parallel and series circuits, as well as mixing counterflow and crossflow circuits. Good thinking, though. You are on the right track.