Fan curves: I can make them
Posted: Fri Jan 14, 2011 7:22 am
Hello I just thought everyone should know that I have a calibrated wind tunnel that I can use to make fan curves (which are curves plotting fans airflow output across different system backpressures).
I dont have any fans of note that are worth testing but at some point i plan to test some a slipstream, sflex and gentle typhoon.
I dont remember the accuracy of the airflow or pressure measurements but I believe it works quite well down to 2 cfm and ? inchesH20.
Reply to this or message me if you have anything in mind or fans you wish to send me to test. I can also test system response curves of heatsinks (which is where you see the pressure needed to blow X CFM through a heatsink).
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These are useful because it gives air flow (@ 0 back pressure AKA stated values in spec sheets) static pressure (@ 0 CFM) and everything in between which I can also take at various voltages (only 12-7-5 since they take some time). If a fan has low pressure @ 20 CFM then its airflow will probably drop to something like 10 CFM when blowing through a large heatsink. If you are trying to push air through a dense heatsink, you would look at something like the 2 inchesH20 mark and find the fan with the highest airflow, and best acoustics.
Attached is an example of how you know what the airflow of a system will be if you have a fan curve and system response curve.
I dont have any fans of note that are worth testing but at some point i plan to test some a slipstream, sflex and gentle typhoon.
I dont remember the accuracy of the airflow or pressure measurements but I believe it works quite well down to 2 cfm and ? inchesH20.
Reply to this or message me if you have anything in mind or fans you wish to send me to test. I can also test system response curves of heatsinks (which is where you see the pressure needed to blow X CFM through a heatsink).
--------------------------------------------
These are useful because it gives air flow (@ 0 back pressure AKA stated values in spec sheets) static pressure (@ 0 CFM) and everything in between which I can also take at various voltages (only 12-7-5 since they take some time). If a fan has low pressure @ 20 CFM then its airflow will probably drop to something like 10 CFM when blowing through a large heatsink. If you are trying to push air through a dense heatsink, you would look at something like the 2 inchesH20 mark and find the fan with the highest airflow, and best acoustics.
Attached is an example of how you know what the airflow of a system will be if you have a fan curve and system response curve.