Calculating the power required to compress air to X pressure at Y CFM?

[J-Ri]

How can I calculate the power needed to compress air to a given pressure and CFM?

I need to select an electric motor that is capable of compressing air to 2 PSI at 520 CFM. I would appreciate the formula(s), not just an answer to this pressure/volume, as I will probably be playing around with slight variations.

I could also use some help determining the best way of moving the air, I would think an impeller is the way to go, but this is not in my area of expertise.

Thanks,
Jason

 

[edgepflow]

The formula in Post #2 of this link is good enough for most practical calculations.

https://www.physicsforums.com/showthread.php?t=164515