In a message dated 4/19/2004 12:51:50 PM Mountain Daylight Time,
soavero@yahoo.com writes:
I apologize - I'm jumping in late here - haven't read
any of this thread. In case anyone cares, the
"engineering" reason behind mounting the fan as David
says is because the flow is more laminar rather than
turbulent in a "pull" configuration. Before anyone
says turbulent flow will provide better heat transfer
(you're right), empirical data typically shows that
the decreased pressure drop and increased flow induced
by laminar flow more than offsets the heat transfer
gain of a turbulent system. If the fan were
extrememly powerful or had a large electric motor,
putting it behind the heat exchanger does not penalize
the HX by making the HX reject the temperature rise
that occurs across the fan.
=====
Ron Soave
'
Please Ron,
Once more in English?
Robert Houston
Texan in New Mexico
There is a general place in your brain, I think, reserved for 'melancholy of
relationships past.' It grows and prospers as life progresses, forcing you
finally, against your better judgment, to listen to country music.
- Kary Mullis
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