Subject: Fluid heat transfer properties
From: Paul
Date: 10/4/2000, 10:05 PM

Al Gietzen wrote:

boiling characteristics of their mixture.  OTOH I don't believe that a
difference of 0.12 in the specific heats of pure water vs. 50/50 is
significant in terms of the heat that must be removed by the cooling
system.

Actually, it is quite significant.  Although the specific is only about 12%
lower, the density is about 20% lower; resulting in the 50/50 glycol/h20
carrying nearly 40% less heat for the same flow rate (1/.8) x (1.12/1) =
1.40.

Using water with corrosion inhibitors is definitely preferably if your are
not concerned about freezing; and IMHO would be a good way to go for your
test flights.

Al

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org