Numerical investigation on liquid film flow and evaporative cooling performance of structured packing surface

In order to improve the evaporative cooling performance of the structured packing and reduce the gas resistance, studies the influence of the spray density, the spacing between the corrugated plates and the swing angle on the liquid film flow of the structured packing by using computational fluid dynamics (CFD). The numerical results show that the optimal spray density of the structured packing is 7.8 m3/(m2·h), and under this working condition, the packing has a higher liquid distribution area and a lower pressure drop. Increasing the space between two adjacent corrugated plates to about 0.4 mm can effectively reduce or even eliminate the pressure drop caused by the liquid accumulation at the intersection point, and minimize the loss of the liquid distribution area. When the structured packing swings along the gravity direction, the liquid may pour, and the critical swing angle is 15 to 20 degree.