In need of some desuperheater info

[MutantToad]

Alright, I know hardly anything about a desuperheater. Can someone please explain to me its purpose, how to build one, and other tidbits? I already looked it up, and didn't find much. Thanks!

~Toad

[n00b 0f l337]

Its basically a radiator or tube coil to get rid of some heat before the condensor.

[MutantToad]

So the desuperheater is used to increase the sub-cool? Or am I missing something...
Anyway, in chilly1's diagrams, the desuperheater is pictured getting really hot. Or is that the amount of heat expelled? Thanks for the info!

~Toad

[n00b 0f l337]

Normally they do get really hot. Its like another condensor.

[MutantToad]

I get it now. Thanks n00b of l337,

~Toad

[Coyote]

i understand, why you would want to have a coil or radiator after a compressor in a multi stage unit. so you can get rid of some heat into the air previous to the HX.

but why ppl use them in single stage units? wouldnt it be simplier to have a larger condensor?

[n00b 0f l337]

Well if your making a small DD unit you won't always have the space for a large condensor. People use it with gases like r502 or r507, i cant remember which... Its always good to have one though.

[FUGGER]

Yes, it is to offload most of the heat before it enters the HX. This increases the exit temp from the HX greatly.

[stockhatch]

So you can just use coils for this? I thought stealing some of the loops from the condenser was what most people ended up doing. Is it nearly as efficient just to use coils?

[gclg2000]

So you can just use coils for this? I thought stealing some of the loops from the condenser was what most people ended up doing. Is it nearly as efficient just to use coils?

With enough air flow yes, but just get ya a small desuperheater. I may one i can send ya for cost of shipping. I"m picking up some free scrap water fountains next week.

[stockhatch]

I was planning on just using a few rows of my condenser as a desuperheater. What type of desuperheater do you have? BTW, thanks alot for the offer! I may end up taking one or two off your hands :)

[n00b 0f l337]

Stockhatch, a desuperheater made from like half of your condensor won't be any better than just your condensor. A desuperheater is an additional thing.

[stockhatch]

I dont understand how that is possible. Some heat will be removed from the gas when it passes through the air cooled condenser, so why wouldnt it offer any advantages? It should bring it at least close to room temp I would think. Please explain.

[_HL4E_HalfLife_]

He means that you would have to add some tubing to ur system not use existing tubing.

[n00b 0f l337]

Thats like saying... If i have an apple. And I cut it in half, and then re-attach the other half my apple will be better than before....

[s7e9h3n]

Here's a pic of my desuperheater on my mach2 - (I'm in the process of changing it's design and placement):
http://img81.imageshack.us/img81/9896/finisheddesupcoil5ik.jpg
http://img81.imageshack.us/img81/663/finishedinside1oj.jpg

[stockhatch]

Ok, if I have a condenser that has roughly twice the cpacity that my first stage will use, and I plumb about 1/3 of this unused capacity into the second stage as a desuperheater, how is that not an advantage to my system?

[n00b 0f l337]

Thats different. That would be moving condensor area from the 1st stage to the 2nd stage loop. Thats not what we thought you were talking about.

[stockhatch]

Ok, I did a bad job of explaining it. What did you think I meant?

[n00b 0f l337]

That on your single stage you wanted to divide the condensor into half and use half as a conddensor and half as a desuperheater. I thought it was damn stupid as well.

[stockhatch]

Hehehe. Yeah, I can see how that would seem pretty stupid :D

[Jack]

stockhatch you had me confused aswell, because i was thinking the same as what n00b 0f l337 said :stick: ;)

That on your single stage you wanted to divide the condensor into half and use half as a conddensor and half as a desuperheater. I thought it was damn stupid as well.

but you are correct about using a couple of rows of the the first stage condensor for a desuperheater :)

[sandman]

Ok, if I have a condenser that has roughly twice the cpacity that my first stage will use, and I plumb about 1/3 of this unused capacity into the second stage as a desuperheater, how is that not an advantage to my system?

It's work well, but you probably don't even need 1/3 of it.

Remember man, second stage gases are $$$.

[Ssilencer]

Here's a pic of my desuperheater on my mach2 - (I'm in the process of changing it's design and placement):

Why do you want to move the coil to other place? I think that's the best place, cause you have a really good air flow.
I use a coil kike that as a desuperheater because in the future I want to regass with r402 (now r502). With a desuperheater I lowered the high side a bit, and gained a pair of degrees. My compresor works colder and consume less (is an Embraco 1/3+HP lbp rated 2.66amp, and is taking just 1.2 to 1.5amp)

[s7e9h3n]

Why do you want to move the coil to other place? I think that's the best place, cause you have a really good air flow.
I use a coil kike that as a desuperheater because in the future I want to regass with r402 (now r502). With a desuperheater I lowered the high side a bit, and gained a pair of degrees. My compresor works colder and consume less (is an Embraco 1/3+HP lbp rated 2.66amp, and is taking just 1.2 to 1.5amp)
Cuz I have to ;) I'm installing a condensor that's 2x the thickness of the stock condensor and after mounting the fan, there's absolutely no space between the fan and the compressor. I'm going to move the coil above the new condensor and have a couple of 80mm fans cooling it. :toast:

[Ssilencer]

Well, that's a good idea.

[Mr. Manka]

do u insulate the desuperheater with neoprene or anything like that

[Jort]

its goal is to decrease temperature of the high side.
so insulating it will bring the effect down to nothing:)

[stockhatch]

It's work well, but you probably don't even need 1/3 of it.

Remember man, second stage gases are $$$.

Youre prolly right. I will likely just use a few coils of the tube and call it good because Im too lazy to reroute the condenser :D Even so, I thought CO2 was pretty cheap.