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Bill Eslick wrote:
> FWIW........... I installed a "mister" nozzle ahead of one of my
> evaporator cores. I have temperature sensors (cht probes) at the exit
> of each radiator, so I can read differences in delta T between the two.
>
> I used a 30 psi pump from a motor home water system. On the hottest of
> days (all summer in Texas), the most benefit I ever saw was 1 to 2
> degrees. I'm sure this could be improved with more nozzles, better
> placement, etc., but I had much more success with modifying the cowl flap.
Can you estimate how much water you were pumping into the plenum?
As I remember, it was probably only about a quart per takeoff.
From Ed's earlier postings on the amount of thermal energy needed to vaporize
a set amount of water, I would say the success or failure of a mister
would depend on how much water it pumped. The volume of water is what
removes the heat, the misting only makes it more efficient.
Right. I never really got any serious quantitative research done before going to the cowl flap. It is just another consumable that is better done without if possible.
When you say, "the exit of each radiator", is that measuring the cooling
temp or the exit air? I'm assuming the former, but I'm not sure.
Someday I plan to write clearly, but not yet. :-) The exit temp is the coolant temp. I just compare it to the "coolant temp" which is taken just prior to the coolant heading for the radiators. Sorry.
Veeduber
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