Influence of Fluid Velocity on Overall Heat Transfer Coefficient of Titanium Plate Heat Exchanger

The relation between the overall heat transfer coefficient of titanium plate heat exchanger and the fluid velocity is fitted by using the experimental data. The influence of the velocity on the overall heat transfer coefficient is calculated and analyzed. The overall heat transfer coefficient increases with an increase in velocity at the primary side( thermal fluid) or the secondary side( cold fluid). Given that the fluid velocity at the primary side is constant,the higher the fluid velocity at the secondary side,the weaker the effect of heat transfer enhancement by increasing velocity.