Sxott
Well-Known Member
I have been reading threads here on COBs for days on end until my brain hurts. Im very thankful to all the knowledgeable people that have been putting out all this good info along with the people sharing their experience. Im very eager to get rid of my HPS heaters.
Here is what I have in the works:
I a 48"Lx24"Dx42"H cabinets a while back for scrogging with LEDs.
I plan on using 8x cxb3070 cobs and 2 HLG-185H-C1400b (thanks to apoulin thread) 4 in series.
For a heatsink 2x 36" pieces of square or rectangular aluminum stock (little wider than chip board). I am a welder so I can tig weld barbed fittings onto these and connect them with another piece of stock to form a U shape. A cheap Hayden transmission cooler with an inline pump will be located outside the cabinet to water cool these tubes. The drivers will also be mounted outside the cabinet. In the event of the coolers fan or pump failing,there will be a thermo switch with probe attached to the heatsink to kill the power before the cobs burn.
This set up will allow me to mount all 8 cobs within an inch or 2 from the top of the cabinet.
Here are some issues I am thinking about:
1) I cant drill into the heatsink tubing because its full of liquid. I dont want to use adhesive because I dont want to ruin the chips in case I want to swap them out for some 5000Ks for vegging. Can these molex holders be attached with adhesive and thermo paste on just the chip part?
2) How hot do these really get? Its hard to grasp it reading it online. Will 8 cobs at 1.4 be too much radiant heat at say 10" from the plants? Is the transmission cooler mounted outside an overkill or could I just get away with mounting a couple CPU water cooler radiators in front of my exhaust fans leaving the cabinet instead. (2x SP120 high static pressure PC fans)?
At about 50 watts a cob, That will add up to about 400 watts in the cabinet. If this cabinet works, I will be stacking a second one on top of it. (i have 2) Its the reason I bought 42" high cabinets. It would be nice to out produce my 1000 watt hps in a 2x4 floorspace using 20% less power and hopefully no AC too. Plus have all my babies on different schedules in the same room.
I will open up a paint program and try to illustrate everything Im talking about here real soon.
Here is what I have in the works:
I a 48"Lx24"Dx42"H cabinets a while back for scrogging with LEDs.
I plan on using 8x cxb3070 cobs and 2 HLG-185H-C1400b (thanks to apoulin thread) 4 in series.
For a heatsink 2x 36" pieces of square or rectangular aluminum stock (little wider than chip board). I am a welder so I can tig weld barbed fittings onto these and connect them with another piece of stock to form a U shape. A cheap Hayden transmission cooler with an inline pump will be located outside the cabinet to water cool these tubes. The drivers will also be mounted outside the cabinet. In the event of the coolers fan or pump failing,there will be a thermo switch with probe attached to the heatsink to kill the power before the cobs burn.
This set up will allow me to mount all 8 cobs within an inch or 2 from the top of the cabinet.
Here are some issues I am thinking about:
1) I cant drill into the heatsink tubing because its full of liquid. I dont want to use adhesive because I dont want to ruin the chips in case I want to swap them out for some 5000Ks for vegging. Can these molex holders be attached with adhesive and thermo paste on just the chip part?
2) How hot do these really get? Its hard to grasp it reading it online. Will 8 cobs at 1.4 be too much radiant heat at say 10" from the plants? Is the transmission cooler mounted outside an overkill or could I just get away with mounting a couple CPU water cooler radiators in front of my exhaust fans leaving the cabinet instead. (2x SP120 high static pressure PC fans)?
At about 50 watts a cob, That will add up to about 400 watts in the cabinet. If this cabinet works, I will be stacking a second one on top of it. (i have 2) Its the reason I bought 42" high cabinets. It would be nice to out produce my 1000 watt hps in a 2x4 floorspace using 20% less power and hopefully no AC too. Plus have all my babies on different schedules in the same room.
I will open up a paint program and try to illustrate everything Im talking about here real soon.