  In this work, physical dealloying was explored as a simple and green method
to microstructure the surface of commercial brass for pool boiling heat
transfer coefficient enhancement. Three samples were dealloyed for 0.5, 1 and 3
hours at 650 C, turning the smooth surface into a porous one with a depth of
175, 200 and 223 um. The boiling experiments carried out in ethanol at 78 C
have shown, that the maximum enhancement of heat transfer coefficient between
110 and 150% was achieved for the sample dealloyed for 0.5 h. Longer intervals
of dealloying reduce boiling performance, but it is still much higher compared
to smooth brass. This simple method can be customized for various thermal
management equipment, such as conventional, plate and micro heat exchangers,
all types of heat pipes, HVAC equipment etc., where the heat transfer occurs
with phase change.
