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Tap water cooling with a condenser ! - Page 2

post #11 of 20
Thread Starter 
Hello,
Wow,thanks a lot for your replies ! They are defenitely helping me to design the setup; I often concentrate on several aspects of a project overlooking other important things.
I'll reply to each seperately:
Quote:
"You seem to be rather worried about condensation, is the tap water you will be using consistently below the dew point?"
"use a plate heat exchanger, some can be found relatively inexpensively"
"Do you have welding experience? If so it would be relatively easy to make a very efficient HX using a couple feet of 1/16" copper tube, some large PVC pipe with end caps, and a couple of simple fittings"
Yes,condensation is defininetly something important especially in QC,Canada.
Here is a temp graph to help you figure things out:

Inside temp is about 23 in the winter(dry,electric-heated air) and 25 in the summer(Air-conditioned air).
I think the main problem will be during winter.It gets extremely cold outside on a regular basis(think -30C on numerous winter nights)and the water is very cold too.I do not have any data on this,but the fact that the faucet nose sometimes drips when filling something leads me to think that the heat exchanger should not,and probably must not,be very efficient.However,the plate heat exchanger is a pretty good idea.I had considered that too,more precisely this one from koolance: http://is.gd/SI3J8r .This has the huge advantage of providing regular,threaded,secure connections; no messing with ground glass crap,no need to put it over the sink.
What makes me frown is the diminution of the "s*x factor"; I would probably light the glass condenser with a nice blue CCFL and watching the coolant flow explaining to my wide-eye guests that this is actually tap water running thru it sure was considered when choosing between both.
Plus,condensation on the exchanger itself would create the need to put it in a transparent plastic pan.It wouldn't be that bad,I guess.

Also,for the piping idea,although I have some soldiering experience,the work involved seems a bit too much.I have red a very interesting article about a geothermal watercooling project done with a PVC tubing grid.I know I won't do something like this,but very interesting and nicely done to whoever did it (is it yours ?) !

However,the generalized insecurity from the possible incapacity to cool the loop reasonably with a glass condenser really leads me to reconsider the idea.After all,that chunk of brazed cooper must not be displeasing to the eye.I'm not even sure the seller shipped the condenser yet,the ad stated 3-5 handling days.I'll think some more and email a cancellation request(or not) tomorrow depending of my choice.

Quote:
Just curious, but why would you need a condenser or even a pump? If the mains water pipes run underground and therefore ambient temperature why not just connect them straight to the block(s) and then waste pipe out?
It's the very first though I had,but I quickly changed my mind for the reasons already mentioned.And with this idea,condensation is deadly;I'll need a thermostatic valve to control the loop temps.That idea was discarded long ago in the choice process

Quote:
What I don't understand is that you want to avoid going sub ambient, but want to use cold water for cooling.
I understand that it might not be fully rational.Getting ride of the rad fans(aka the whole exos 2.5) is appealing,and heck,the water's there,it just sounded logical to me.Also,I have a lot of custom,strange,or not always useful ideas but I usually put efforts on it anyway.Half of the goal are the results,but the other half is to learn about things,technical or not,and to generally get smarter at designing and engineering things.


Thank you all for your opinions.They really help me in making a smart decision with this.
Edited by kiwi32 - 8/12/11 at 4:12pm
post #12 of 20
Thread Starter 
So,the question is now:

post #13 of 20
You could always insulate your watercooling loop if condensation is a concern.
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post #14 of 20
Thread Starter 
Condensation piss me off
But I guess you're right,if its often gets too cold,I could work something out.Its something like 8-5 for the heat exchanger right now
post #15 of 20
Im just curious, whats the purpose of this? Are you not getting good temps with the exo's?

How could this idea of yours benefit more than a traditional water cooling setup? No offense, the whole thing sounds far fetched and wasteful.

Is it just one of those "wow, that would be cool" kind of things?
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post #16 of 20
Jai eu la meme idee.

I started a thread about that. Though I would use a window box that I've come up with. Granted measurements aren't exact yet but it was to give me an idea.

Linky.

Bascially have the interior loop isolated from the outside. However that brings about new problems. Those HXC's from koolance can be very efficient, but if they are too efficient your water may freeze inside the HXC. Clog ups and reduce efficiency is not what were about here on OCN. So the outside loop will need a 60/40 ethynol glycol / distilled water solution, while the inside loop can be a 20/80. Just so the water doesn't freeze in the exchanger.

I'll be building that during the month of september. I'll keep you posted if it works with winter.
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post #17 of 20
Thread Starter 
Quote:
Originally Posted by AliceInChains View Post
Im just curious, whats the purpose of this? Are you not getting good temps with the exo's?

How could this idea of yours benefit more than a traditional water cooling setup? No offense, the whole thing sounds far fetched and wasteful.

Is it just one of those "wow, that would be cool" kind of things?

Well,as I explained earlier, half of the motivation comes from a quiet,cool looking setup, and the other half comes the things I'll learn in the way.
The Exos temp are pretty good for my usage.I'll be happy if I lower them by 30%.

Quote:
Jai eu la meme idee.
Are you located in Quebec too ? If so,those cold winter could create extreme cooling for your pc ! It's not the kind of cooling I am looking for but the setup sure sounds nice.Keep us posted.



So the decision is taken now.I am going with the koolance HXP-135 ( http://is.gd/SI3J8r ).Just emailed the seller to cancel the condenser sale,hopefully he will agree. I'll just use regular,cheap tubing and fittings from the hardware store for the tap loop.The res/pump combo I'm planning to use to replace the Exos is this one: http://is.gd/uKqNiA but that one seems interesting too http://is.gd/mpMadT (though double the price).Any thoughts ?

Thanks for the help.
Edited by kiwi32 - 8/14/11 at 7:33pm
post #18 of 20
Thread Starter 
Good evening,
Looks like things are getting more serious.I just finished my shopping list and my final (alas quickly done) loop drawing :

XSPC X2O DC-75049,99 $http://is.gd/uKqNiA
Koolance HXP-13564,99 $http://is.gd/NN9ewF
2x G 1/4 3/8 Nozzles (Compression)8,98 $http://is.gd/b7SfX7
15Ft 3/8 UV Tubing19,35 $http://is.gd/9SYbAM
2x G 1/4 1/2 Nozzles (Clamps)9,98 $http://is.gd/50YpYZ




Total:153,29 $

Exos 2.5 Sale (Projected) -200,00 $

Projected Balance:46,71 $



Which means that I will order the stuff and receive it in arround a month.I'll keep you posted with pictures of the stuff received once I get it in this thread.
Thank you for the tips that helped me design it.
post #19 of 20
Quote:
Originally Posted by kiwi32 View Post
Well,as I explained earlier, half of the motivation comes from a quiet,cool looking setup, and the other half comes the things I'll learn in the way.
The Exos temp are pretty good for my usage.I'll be happy if I lower them by 30%.



Are you located in Quebec too ? If so,those cold winter could create extreme cooling for your pc ! It's not the kind of cooling I am looking for but the setup sure sounds nice.Keep us posted.



So the decision is taken now.I am going with the koolance HXP-135 ( http://is.gd/SI3J8r ).Just emailed the seller to cancel the condenser sale,hopefully he will agree. I'll just use regular,cheap tubing and fittings from the hardware store for the tap loop.The res/pump combo I'm planning to use to replace the Exos is this one: http://is.gd/uKqNiA but that one seems interesting too http://is.gd/mpMadT (though double the price).Any thoughts ?

Thanks for the help.
Sounds good. Let us know how it turns out. Pictures are always a nice touch. Good luck.
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post #20 of 20
Thread Starter 
Hello,
No,I did not forget about this thread !
Getting the stuff needed for the project took much longer than expected.Yet,I do have most of it up and running right now.I just need to RMA the XSPC res/pump combo which makes a terrible grinding noise.After preliminary tests with the koolance HXP-135 Heat Exchanger,which looks like a very nice and effecient piece of equipement,the setup seems extreamly effective.Just a small tap water flow was enough to keep my core i7 920 @ 3.8ghz very cool (40 C).I don't have time to write or explain in more depths for now,been very busy these days,but I'll be back soon for sure to clarify things and post more pics !

Defective pump/res combo:
http://is.gd/Dv1g3I
Rest of the setup:
http://is.gd/JCXXpu


Thanks.
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