Alan Adler's "cool.exe"

Hi All,

I've been playing with Mr. Adler's cool.exe program (Jan. 2002 Sky & Tel.) again and I just noticed something...The program lets you adjust the cooling fan's output using a FPS or feet-per-second value. However....most of the cooling fans I've seen (on websites and in magazine ads) are rated in CFM or cubic-feet-per-minute. If I divide a CFM value by 60 to get a cubic feet per second value it looks like I'll need Pratt & Whitney Double Wasp radial engine to drive a fan at the necessary rate

That being said, the 120mm fan I currently use, rated at 53CFM, seems to work just fine so this question is just out of curiosity I guess...

Ed

Probably mean to put it in CFM and it is an error?

[QUOTE]Ed Moran said:

Hi All,


If I divide a CFM value by 60 to get a cubic feet per second value it looks like I'll need Pratt & Whitney Double Wasp radial engine to drive a fan at the necessary rate



The upside of that is it would just sound SOOOO awesome. *evil grin* There ain't much that sounds as good as a big round motor.

-Kevin in Indy

I'm guessing that it's accurate; he's talking about fan speed. You could convert by using:

FPS (velocity of air passing through cooling fan, in feet per second; note this is NOT a unit of volume)

*

12 inches per foot

*

Area (of cooling fan in square inches)

=

CIS (cubic inches per second) of air that the fan is pushing in.

Then you can convert CIS to CFM easily: (CIS * 60) / (12^3) = CFM