ThatKidiscrying
Active Member
What’s the best way to cool a porcupine style “ pin “ heatsink with a small fan blowing air across it from the side or laying the fan on top and having it blow straight up drawing air through it ?
DIY with Quantum Boards
- Thread starter robincnn
- Start date
Barristan Whitebeard
Well-Known Member
I would sit a fan on top of the pin heatsink and have it blowing air down through the fins.
On my QB 96 Elite V2's I have a 120mm fan on top of each heatsink positioned in this way.
Airwalker16
Well-Known Member
Never pull air through fins, but push it down Into them.
end_of_the_tunnel
Well-Known Member
As an aside, looking at images of HLG96 / 360 Elites with the installed heatsinks, I find them very appealing. Timber uses them in some products, I think.
Surface area on them appears immense. I bet even with fan on lower rpm, the effect of adding them is positive.
Do you remember your before and after running temperatures? What amperage are you comfortable running your 96 V2's at currently?
coreywebster
Well-Known Member
Why?
ianc4990
Well-Known Member
Seems like bad info to me.....
Airwalker16
Well-Known Member
In what way do you mean? You sent for an RMA form from allied and they responded but you're waiting on where to send it?
Or do you mean you've sent them the driver and you're just waiting on your repaired driver to get back to you?
Or do you mean that they received it and MeanWell hasn't returned it to them, to then send back to you?
Airwalker16
Well-Known Member
Because that's the best way to get the heat off of the heatsink most efficiently. Using a 140mm PC Axial Case Fan, if you pull air upwards if it were sat on top of a 144mm round Pin Fin, it's able to pull surrounding ambient air from the sides as well.
When its facing downwards, the full output of the fan is forced down through the fins and pushes the air out and off the heatsink. I learned this YEARS ago from @Rahz & robinncn who doesn't seem to be on here anymore?
Airwalker16
Well-Known Member
Lol why? What do you think is the best way to use a PC fan on a round pin sink for active cooling? I suggest you take a look at pre-made heatsinks made for PC processors and see how they're built and which way the air is moving. I think you will be surprised.
coreywebster
Well-Known Member
Fair enough man, just seemed its going against the natural convection of the heatsink but if rahz said it then im happy to take that as gospel.
Yeah haven't seen Robin for a long time on here. Guess he's a busy beaver.
Airwalker16
Well-Known Member
When I said not on here anymore, I mean NOT on here anymore. As in I either don't remember how the username was spelled, or if it was spelled some weird way I don't remember, but when I @ his name, it's just not there anymore. Which is weird..
And Rahz is an actual legend. I can't tell you how much he put up with my questions and was always so cordial, respectful, and most of all, WILLING to answer them and help me understand any and all aspects of DIY.
I've thanked him a hundred times but it's still not enough in my mind.
Because of his kindness and openness to mentor me, I promised him I would carry the torch and do the same for others here. He never did ask me to or specifically encourage me to treat others well, but because of him, I will never forget how grateful I was for the lifeline of important knowledge he extended to me. I strive to model myself and my attitude for other members to replicate how he treated me all those years ago.
Now I'm happy to say, I have helped hundreds of folks with their questions on here and try as much as possible to not be a troll and to treat others exactly the way he treated me.
I could never say enough good things about @Rahz and his amazing contributions to this forum.
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ianc4990
Well-Known Member
Just seems like in a lighting application, the heatsink is mounted horizontally vs vertically. Heat likes to travel up, so why would you try to force it down. Just seems natural to cowl the fan abd have it suck upward.... pcs are also in an enclose case that has the air routed to an exhaust vent/port
Airwalker16
Well-Known Member
Sure heat rises, but when your push the heat off the fins, to the edge of the heatsink, it's still going to rise once it gets there.
Another few members opinions, the first of which is the legend himself @SupraSPL
IF you are new to LED and want help choosing what to buy, POST HERE!
This is off of a guide from LeoLED Lol... at least they know what they're talking about.
www.rollitup.org
JayY2015
Well-Known Member
Could a guy find a 4ft heat sink pre drilled for 4 diablo boards and run them at around 80w each for a total of 320w to get a good spread to cover a 2ft x 4.5 ft area. Would this be a good idea or is there a better way to cover this with wall to wall light, I actually need to cover 4.5 ft L x 6ft w . I was just going to make 3 of these if possible.
coreywebster
Well-Known Member
His profile is still there but yeah cant seem to @ him. Its done this with other people too. Weird.
pop22
Well-Known Member
Tests have shown air coming from the side cools better than a fan blowing down on them.
pop22
Well-Known Member
pins radiate differently than fins, airmovement from the side has been proven to increase cooling better than a fan blowing down.
pop22
Well-Known Member
Get a slate 5 Quad. Any custom heatsink will cost a LOT more! And it can handle up to 600 watts
pop22
Well-Known Member
I believe I read in an overclocking forum that pulling air up through the fins draws heat into the fins from surrounding components. This might not hold true in an environment where the heatsink is the only heat radiating source.