X-Mozilla-Keys:                                                                                 
Jeff Spitzer wrote:

I have been giving a lot of thought lately to the cooling
problem. So far we have been going on pure experiment only.
I thought I would run this by you for comments.

Just me or the group?

The whole group.

Preliminary givens:

D: The temperature increase of the cooling air exiting
the radiator is directly proportional to the square
root of the thickness of the radiator.

Not even.  The temp can never be higher than the hot coolant.  A thin
radiator with slow moving air can get the air to max temp.  There is no
such relation.

OK what is the mathematical  relationship between the air temp increase
as a function
of travel through the core and air velocity?

E: The first half of the radiator does 3/4 of the cooling.

You could probably prove this to me and I don't outright argue it, but it
sounds oversimplified.

You should get the book "Compact Heat Exchangers" by Kays and London.  It
is the recognized authority.  The simplest method is presented which takes
into account efficiency of the core and core volume.  It's been a while for
me.  Bottom line, no point wrestling with your own ideas or
over simplifications from some hotrod book when the real authority is
published (out of print).

Jeff Spitzer

Ok I will search the used book guys on the internet. Thanks for the tip.
It seems all the good ones are always out of print.

Paul Lamar
 
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