Reducing Particle Deposition in Air-Cooled Heat Exchangers

Abstract

An investigation has been made into reducing particle deposition on the gas side of extended-surface heat exchanger surfaces by using six different “spoiler” designs, i.e., wedge, small rod, large rod, plate, profin, and coiled coil “spoilers.” The effects on fouling resistance, Colburn j factor, friction factor, and fan power have been determined experimentally and developed into characteristic equations. The investigation showed that the tendency of particle deposition can be reduced by using an appropriate “spoiler” design. The effect of a “spoiler” is influenced by its position and air velocity, but apparently not by particulate bulk concentration.