Water cooling system for a grow box, well.. sort of..

Hey everyone, Im trying to make some sort of water cooling system for my grow box and would love some feedback on it

first of all you can check out my setup on my journal:
https://www.rollitup.org/t/stealth-loudspeaker-grow-cfl.822635/
maybe the photos there will help you grasp the whole idea a little better

back to business, I'm trying to do this as simple as possible and also without a pump!
I was thinking of using the fact that cold water weighs more than hot water to my benifit
I have two scenarios in mind, the first is to use two pc fan radiators which I will attach to my fans like this:

If I'm correct, after I fill the whole system with cold water (still thinking of how to do that without spilling lol) the bottom intake fan will blow cold air and after some time the water will heat up and move up to where the outtake fan is, and hopefully will cool down again and so on...
I'm really really skeptical that the outtake fan will actually cool the water, because there is also heat from the lights and from the fan itself - but I'm hoping it will work for the first couple of hours of the light cycle - which is when the temps outside are the highest
after that when the lights go off the water will cool down or I could just refill it with cold water every day.

the second idea is exactly the same only cheaper - but probably less effective :/

instead of radiators I can use a simple copper tube that's filled with water (this is easier to fill up as well)

do you guys think this will work? I'll love to hear your thoughts on it

by the way, I added a picture of a pc radiator for those of you who want to know what it looks like

and for those of you who had experience with pc radiators: would they act as a light trap? I'm afraid I dont have much room and if I want to use a radiator its instead of a light trap...

Cheers

I would prefer to keep my water very far from my electricity, that said ...water coolers are popular with PC gamers and overclockers

vostok said:

I would prefer to keep my water very far from my electricity, that said ...water coolers are popular with PC gamers and overclockers

Click to expand...

I wasnt planning on keeping it next to any power source or electric wiring
my grow box consists of a front panel, which is where the fans are attached to - facing the inside of the box
I'm planning on attaching the whole water system on the other side of the front panel - facing outside of the box, where there are no wiring what so ever
If this is done correctly Im sure there is nothing to worry about....

and hopefully there are some pc gamers around here because I have absoulotly no knowlage on the whole water cooling subject

Good post ...you may wanna look to those oil coolers that Jap Boy Racers mod there rice car racers with ....lol

vostok said:

I would prefer to keep my water very far from my electricity, that said ...water coolers are popular with PC gamers and overclockers

Click to expand...

My suggestion was going to be for him to pick up an inexpensive water cooling system with pump and radiator.

You could make a pretty sweet cooling device with a few components.

http://www.frozencpu.com/cat/l2/g30/c95/list/p1/Liquid_Cooling-PC_Water_Cooling_Radiators.html

*edit for addition*

You could have it cool a large mass with the heat sink. Preferably a slab of stone or metal perhaps. The thermal mass of the slab material would help regulate temperature with the assist of your fan(s) and it would be cooled with a radiator that could be sent air from your exhaust fan.

Anyone ever drop water cooled heatsinks directly on a LED array so as to remove the heat before it warms the air?