Research on the Influence of Structural Parameters on the Performance of Shell and Tube Heat Exchangers with Staggered Louver Baffles

Abstract

The effects of louver baffle inclination angle α and adjacent louver baffle group intersection angle β on the performance of staggered louver baffle shell and tube heat exchanger are studied. The results show that the pressure drop on the shell side of staggered louver baffle heat exchanger gradually decreases with the increase of the inclination angle of louver baffle α, and gradually increases with the increase of the angle β of adjacent louver baffle group. Compared with that in the heat exchanger with segmental baffles, the pressure drop is the most obvious when the inclination angle of the louver baffle is 75°, which is reduced by 79.26% to 79.61%; when the intersection angle of adjacent louver baffle group is 15°, the pressure drop is the most obvious. The reduction range is 76.65%～77.12%. When the inclination angle α of the louver baffle is greater than 45°, the heat transfer coefficient per unit pump work of the staggered louver baffle heat exchanger decreases with the increase of inclination angle α. With respect to the heat exchanger with segmental baffles, when the inclination angle of louver baffle and the intersection angle of adjacent louver baffle group are both 45°, the comprehensive performance of the new heat exchanger is the best, an increase of 79.49% to 118.70%.

Keywords

• louver baffle
• numerical simulation
• shell and tube heat exchanger
• enhance heat transfer