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No doubt it
could stand improvements for sure, Jeff.
There are
four DT's I employ in
the cooling equations. Change in air temperature across the
radiator, change in air temperature across the oil cooler and change in
fluid temperature of the coolant and oil as they flow through their
heat exchanger. I have heard of Air DT across the
radiator ranging from 50-100F, I am currently using a
DT of 70F ,
but I know that Tracy has reported a DT of
100F. I am also using DT of 70F for the
oil cooler and that is probably too high. For both
fluid DTs, I am using
16F.
IF anyone has
reference material or sources that could help me refine those figures - it
would undoubtedly improve the cooling section.
As Jeff pointed
out for the cooling section there is no input for OAT although there is
for the power section. My initial thoughts would be to pick
some OAT and
I'm thinking of 59F (SL standard day temp) as a nominal mid point
of
DT. Then if
OAT is above that DT, then to
simply subtract the difference between OAT and 59F and reduce the air
DT across the
radiator by that amount. Conversely if OAT is below 59F then to add
that DT to
the 70F I am currently using.
By increasing
the DT factor more
heat is transferred (better cooling) by reducing the DT factor less
heat is transferred (worst cooling)
IF anyone has
reference material or sources that could help me refine those figures - it
would undoubtedly improve the cooling section.
Ed
Edward L.
Anderson
Anderson Electronic Enterprises LLC
305 Reefton
Road
Weddington, NC 28104 |