Abby Normal wrote:
Evaporative cooling could lower the temperature of the air entering a
condneser coil in almost any environment.

Roof is always hotter than documented in-the-shade dry bulb
temperatures. So a humif environment in the low 90s would be well over
100 on the roof top. Evaporative cooling could pull the air temp down
even in a humid environment.

A lawn sprinkler on a condenser coil makes a big difference on the
hottest of days



My assumption was that if the temperature of the air cooling the
condenser was lowered to about 80 or below it should vastly improve the
efficiency of the unit, similar to having a cooling pond. These units
were on a slab on the ground but in full sun.

I would not want to have excessive water spraying on Aluminum coils.