A 30w 52" ceiling fan moving 6200cfm is even more effective if were talking about the ' right setup
So, COB mounted on bottom aluminum plate and heatsinks mounted on top of plate above where COB is? Others will know more about this than I, but I think this will adversely affect the cooling. Heatsink surface will probably not be perfectly flat with reluctant air gap(s) when mounted to plate. Most people using heatsinks just mount COB to heatsink. You could be the one who experiments with this.
I think he meant cob -> heatsink -> aluminum plate. Depending on how its mounted it could block airflow ?
If I'm understanding correctly you want to cover the heatsinks fins with the aluminum plate?
https://www.rollitup.org/t/heatsinks-in-europe.850441/
Thanks man
Might be easier to mount the lens to the heatsink as well and cut the hole large enough for the lens to poke through as well.
the metal plate could increase the cooling if there is enough contact between the heat sink and the plate, if that's your objective using aluminum would be better than steel.
Yeah just thought why not use aluminum. Also would you put any thermal grease/adhesive between them maybe around each cob
I would choose my heatsink so that its wide enough to make lots of contact to the aluminum plate, and apply a silicone base thermal grease between the heatsink and the aluminum plate and using nuts+bolts to secure the heatsink to the plate. so that you can apply some pressure.
a 120 mm fan on a 5" wide heatsink will use less power to get the same airflow from 80 mm fans. especially considering that it will take at least two 80 mm fans to cover the heatsink.A 30w 52" ceiling fan moving 6200cfm is even more effective if were talking about the ' right setup
They may move more air, but they also draw more power. Sometimes more airflow isnt needed. The only case for 120mm fans imo is that theyre cheaper usually.
I second this comment. Thanks for adding to my list UK! Props to these seriously smart, patient, and generous humans. Thank you guys!!!!
Depends on the length of the heatsink. 20 inches or less and a single 80mm fan is sufficient. As long as the fan is blowing into the channels above the cobs.
It doesn't need too
I'm sorry, just realized I'm not being very clear. I'm not disputing the fact that a 120mm fan will move more CFM/W. (assuming similar models). I'm trying to say that an 80mm fan is 'good enough' in most cases and that further increases in CFM is going to provide diminishing returns.