chilLED: water cooled, ducted, or active led fixture

I put copper plates on a copper pipe.

:edit: Ah I should have clicked on the "reply" button. Ah well.
 
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wietefras said:
I put copper plates on a copper pipe.

:edit: Ah I should have clicked on the "reply" button. Ah well.
Click to expand...
Cool, do you have any pics? What size pipe, do you solder the plate to the pipe, and is it just a straight shot or do you coil it or otherwise do anything to increase the surface contact area? I like the idea of copper because it withstands corrosion better, and soldered fittings have fewer leak issues ;?)
 
Those are CXB3070's. It's not easy to see in the picture, but the COBs are mounted on 3mm thick copper plates which are soldered onto the pipe. Here and there you can see the corners peaking outside of the Ideal holders. So the COBs are actually on a flat copper surface.
 
I doubt there is much performance difference indeed, but didn't have rectangular aluminium tubing. Nor would I know how to weld them together. Copper pipes and all needed fittings are cheap and available everywhere. It's designed to transport warm water around without leaking so I assumed it would be safe.

I'll admit it looks "ghetto", but it works ;)

Actually in the finished product there are several pipes connected for a single flow. This was just a test tube. The full thing is 3 pipes with 8 COBs (400W total).
 
wietefras said:
I doubt there is much performance difference indeed, but didn't have rectangular aluminium tubing. Nor would I know how to weld them together. Copper pipes and all needed fittings are cheap and available everywhere. It's designed to transport warm water around without leaking so I assumed it would be safe.

I'll admit it looks "ghetto", but it works ;)

Actually in the finished product there are several pipes connected for a single flow. This was just a test tube. The full thing is 3 pipes with 8 COBs (400W total).
Click to expand...

Who cares if it looks ghetto so long as it works :)

My only concern would be whether the volume reduction going from the plate through the weld to the pipe would cause a bottleneck or not. For these applications at these temps it might not even be an issue though, idk.
 
I think it heats up reasonably evenly. Here is a FLIR image from the back of the copper plate:
CopperBack.jpg

This thing has two camera's and since I was rather close, the two images don't align exactly. The thermal image is a bit moved to the left compared to the visual overlay. The thermal image itself looks reasonably uniform to me though.

Temperature is stable too. Although of course it depends on the water temperature.
 
The only advantage I see with the aluminum is if there was no water in the tube. The aluminum might be enough cooling to still protect the COBs. But very cool idea.
 
very nice! these gen2 modules are awesome!

then i just saw this on youtube, its like crazy big quantumboards.24V or 48V @ 100W a panel take a look:

got 330 LED's per panel and 6 panels

how do they ged rid of the heat? or isnt there much heat to get rid off?
 
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