Extensive experiments on the heat transfer and pressure drop character
istics of brazed aluminum heat exchangers were carried out. In the pre
sent study, 27 samples of louvered fin heat exchangers with different
geometrical parameters, including tube width, louver length, louver pi
tch, fin height, and fin pitch were tested in an induced draft open wi
nd tunnel. Results are presented as plots of friction factor, f, and C
olburn j factor against Reynolds number based on louver pitch in the r
ange of 100 to 1000. Comparisons between the Sahnoun and Webb model an
d the present test data are reported and good agreements were found. B
y introducing ''area ratio'' parameters, a simpler correlation of the
Colburn j factor and friction factor f were obtained. It is shown thar
85% of the experimental data of heat transfer and friction data were
correlated within +/-10%.