12xCXB3590 Passively Cooled

Netherfly

Netherfly

Well-Known Member
First off, hi from the Netherlands!! I read all my info off this forum I wanted to share my build with you guys:

2 x HLG-240H-C1050A
12x CBX3590 3500K
12x Aluminium heatsinks (105mm in diameter, height 60mm) rated for 40 watts

http://hzlangteng.en.alibaba.com/product/60224879948-801280542/Aluminum_extrusion_led_street_light_heatsink.html

47x47x78 inches growtent

Now i'll just bombard you with all the pictures :bigjoint:























First grow will be 7 feminized seeds: Black Jack by Sweet Seeds :weed:

http://en.seedfinder.eu/strain-info/Black_Jack/Sweet_Seeds/
 
BOBBY_G

BOBBY_G

Well-Known Member
how much were those particualr heatsinks, i assume they came black anodized? what sort of temps are you seeing at their rated wattage?
 
A

alaskanboy

Well-Known Member
Hello Netherfly , really nice build. What I like is this is stripped down to where you are spending money on the photons, instead of fans that you don't need and the standard heatsinks . Can I ask where you found the square tube frame, and also the hardware bolt/wingnut for mounting cobs to the frame? thanks:hump:
 
tstick

tstick

Well-Known Member
One of the best designs I have ever seen! I love the flexibility to be able to tilt the COBs! Awesome job, Netherfly!
 
Netherfly

Netherfly

Well-Known Member
Glad you guys like it!

@bobby g:

Here are the temps of the heatsink, and ambient temps with LED's at full power, and ventilation ON (tube vent on lowest setting with carbon filter and 2 clipon fans in the tent)
I spend a lot on a supersilent tube ventilator, this tent is very stealthy :)

IMG_20160209_192110.jpg IMG_20160209_194500.jpg

@ALASKAN boy:

I bought the tubing + connectors at a local shop which builds aviary's.
Here is the link to their website, hopefully you can get a hold off it in Alaska :)
http://www.volierezelfbouw.nl/c-2399678/hoekverbinders-voor-koker-25x25x2mm/

Look who decided to show up!

IMG_20160209_195844.jpg
 
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thetr33man

thetr33man

Well-Known Member
Nice build. Im also interested in building a LED using passive cooling. Judging on what I have read so far, it seems like those heatsinks might not be enough for those cobs but I suppose its hard to calculate surface area for pin style instead of fin style sinks.... Is that heat measurement of the air above the sink, or the actual metal? I saw on a youtube video you should have 17 square inches of surface for each heat watt being generated by the cob. Is that fairly accurate?
 
Netherfly

Netherfly

Well-Known Member
@thetr33man:

If you follow the link in my first post, on alibaba, you can find the specs of every dimension heatsink they offer.
The pins create a big surface area.
These are rated for 40 watts, according to Growmau5's calculations for this setup, my COB's dissipate 35 watts
I measured with the meatprobe touching the base of the heatsink.

@Sativied: Danku Danku :)
 
PSUAGRO.

PSUAGRO.

Well-Known Member
I wonder how those heatsinks will hold up in the summer?very close to max................. nice & simple industrial build, tilting angles is a great idea on the perimeter

good luck and will follow this run...
 
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