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Making a Personal fan from 120mm Computer fan? Answered

I've been asked to make a solar powered personal fan from a 120mm computer fan - This wasnt so hard, but when I powered it up it got me wondering, would reducing the amount of blades (currently 11) make it a more efficient personal cooling device?

Thanks :)

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seandogue

4 years ago

The blade pitch is the issue. Comptuer fans are made to pulll relatively low amounts of air out of the computer case. They are not designed as blowers.

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petercd

4 years ago

My thinking is that reducing the number of blades will reduce the airflow. It might now spin faster with less load and use more current if its just a regular dc fan and not a brushless current controlled one.

In a nutshell... more efficient? probably not.

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lshoesmithpetercd

Answer 4 years ago

Thanking you :) - S'all I needed. Ha