REFLECTOR: 2 Pass cooler

[Al Gietzen]

Thermodynamic question.  If one is going to stack two coolers, is it better
to put the incoming hot oil through the front cooler that has also has the
coolest air, knowing that the second cooler will suffer from cooler oil and
warmer air?  Or, is it better to put the second cooler that the oil passes
through in front where it'll have the cooler incoming air.  The second
cooler in line will see warmer air, but the oil is hotter, coming straight
from the engine......or, does it make any difference?  Chuck Jensen 

 

It does make some difference.  You're looking to maximize the 'average'
delta T between the oil and the air; so you run the hot oil through the
second cooler first, and then the cooler oil through the first cooler.  It
is also best to 'counter flow'; so one cooler goes top to bottom (or left to
right) and the other the opposite.

 

Al

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20090801/f2bebbf3/attachment.htm>