SupraSPL
Well-Known Member
So I put the 45cm²/W setup in the tent and let it stabilize. I hung it in a area that I thought was getting the least airflow. Ambient is 25.5C. Heatsink temps are 31-33C, which corresponds to about 5% temp droop, really not too bad for passive cooling.
Then I hung it in an area with good airflow and temps were 30.5-32.5C.
In the same tent there are 10.08" modules running at about 98cm²/W passive cooled. The ones getting the least airflow are at about 31C and the ones getting the best airflow are at 28C. I think that shows how much more effective the 8.46" profile is for passive cooling that the tall fins of the 10.08" in a grow space.
There is an active cooled 5.88" heatsink that is at 26-27C.
Overall, it is good news, it looks like we can use less heatsink than 90cm²/W for passive cooling if there is some circulation airflow and using the wide fins spacing with short fins. Even better if it is for side lighting and the fins are running vertically.
Then I hung it in an area with good airflow and temps were 30.5-32.5C.
In the same tent there are 10.08" modules running at about 98cm²/W passive cooled. The ones getting the least airflow are at about 31C and the ones getting the best airflow are at 28C. I think that shows how much more effective the 8.46" profile is for passive cooling that the tall fins of the 10.08" in a grow space.
There is an active cooled 5.88" heatsink that is at 26-27C.
Overall, it is good news, it looks like we can use less heatsink than 90cm²/W for passive cooling if there is some circulation airflow and using the wide fins spacing with short fins. Even better if it is for side lighting and the fins are running vertically.
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