Lighting Custom COB Liquid cooling design

[dankle]

Hi all. I just ordered parts for my first COB build. I'm going with a Ctizen CLU048-1212 3000K LED chip paired with a 50W 1500MA driver from here. I will be mounting this on an Arctic Alpine 11 GT Rev2 heatsink (75W heat dissipation). Was shooting for the 100w version but was limited with a $50 budget.

I plan on building a few more after building one successfully, how do these specs look? The goal is to have 4x 50W COBs fill an space approx 2.5'x3.5' Originally opted to buy Vipar LEDs but after learning more about COBs, decided to build my own. What kind of efficiency can I expect?

- also -

For fun I priced out the parts to build an array of four Citizen CLU058-1825 LEDs or CREE CXB3590 LEDs each running with a 100W 3000mA driver, cooled with a liquid cooling system with a 360mm radiator, 3x 120mm fans and wye connectors to split the single stream of cooled h20 into four lines (one for each cob).

It seems that many people run the 3590s at 50W to maintain effective efficiency, but rather than buying 8 COB units with passive heatsinks, I considered using 4 3590s (or CLU058-1825s) at 100W ea and cooled with a central liquid cooling system. The advantage I saw with this would be a) less expensive LEDs needed and b) the ability to keep the radiator outside of growing environment, providing cooler temperatures for the LEDs and grow room.

Is this a silly idea or is it worth pursuing?

LIQUID 4X COB DESIGN
Citizen CLU058-1825 COB LED 3000K 4x $200
100W LED Driver 36V 4x $133
ARCTIC F12 120mm Fan 5x $24
Thermaltake R360 Radiator 1x $53
Poly Tubing 3/8" ID 5/8" OD 20' 1x $15
Thogus 3/8" Wye fitting 10x $14
Thogus 3/8" Tee fitting 1x $4
ModTek 3/8" Water pump 1x $40

Total $483

Yes there's probably a bit missing to make this a complete build, but I am not picky about aesthetics and can assemble the frame with twigs and be happy so long as it holds.

Does the cooling power of liquid make up for the difference running at 100W/chip rather than 50W?

Grateful for any input.

 

[Greensleeves]

Hi all. I just ordered parts for my first COB build. I'm going with a Ctizen CLU048-1212 3000K LED chip paired with a 50W 1500MA driver from here. I will be mounting this on an Arctic Alpine 11 GT Rev2 heatsink (75W heat dissipation). Was shooting for the 100w version but was limited with a $50 budget.

I plan on building a few more after building one successfully, how do these specs look? The goal is to have 4x 50W COBs fill an space approx 2.5'x3.5' Originally opted to buy Vipar LEDs but after learning more about COBs, decided to build my own. What kind of efficiency can I expect?

- also -

For fun I priced out the parts to build an array of four Citizen CLU058-1825 LEDs or CREE CXB3590 LEDs each running with a 100W 3000mA driver, cooled with a liquid cooling system with a 360mm radiator, 3x 120mm fans and wye connectors to split the single stream of cooled h20 into four lines (one for each cob).

It seems that many people run the 3590s at 50W to maintain effective efficiency, but rather than buying 8 COB units with passive heatsinks, I considered using 4 3590s (or CLU058-1825s) at 100W ea and cooled with a central liquid cooling system. The advantage I saw with this would be a) less expensive LEDs needed and b) the ability to keep the radiator outside of growing environment, providing cooler temperatures for the LEDs and grow room.

Is this a silly idea or is it worth pursuing?

LIQUID 4X COB DESIGN
Citizen CLU058-1825 COB LED 3000K 4x $200
100W LED Driver 36V 4x $133
ARCTIC F12 120mm Fan 5x $24
Thermaltake R360 Radiator 1x $53
Poly Tubing 3/8" ID 5/8" OD 20' 1x $15
Thogus 3/8" Wye fitting 10x $14
Thogus 3/8" Tee fitting 1x $4
ModTek 3/8" Water pump 1x $40

Total $483

Yes there's probably a bit missing to make this a complete build, but I am not picky about aesthetics and can assemble the frame with twigs and be happy so long as it holds.

Does the cooling power of liquid make up for the difference running at 100W/chip rather than 50W?

Grateful for any input.

Wouldn't you need to use 4 Thermaltake units, 1 for each cob?

 

[dankle]

Well the way I drew it one radiator would split into four streams so each cob can get an even dose of cool water. Guessing one thermaltake would provide plenty of cooling for all four

 

[Greensleeves]

Well the way I drew it one radiator would split into four streams so each cob can get an even dose of cool water. Guessing one thermaltake would provide plenty of cooling for all four

Your gonna need to buy 3 more water-blocks then, and some sort of junction set up to join 4 water-blocks to one radiator. Personal I prefer a fully sealed unit when I mix my electricity and water together lol. Well in my computer that is. When I first saw the cob diy videos by mau5, the first thing I thought of was water cooling, being a over-clocking enthusiast myself. but the more I looked in to it, I think the whole idea of going Cob is more about efficiency than raw-power. But my understanding on the subject/theory craft is limited.

 

[dankle]

yeah i feel you, I guess blasting 50w through the smaller chip will create more heat and be less efficent than the larger cobs, but hopefully it will work well for a budget.

got the chio and it looks pretty sick, the geometry