The wave-fin flat tube condenser is well applied in direct-cooled power plants.In order to improve the efficiency of direct-cooled condenser and optimize the physical structure of flat tube fin

3D physics-mathematics model was established and the numerical analysis was performed by Fluent solver.By comparing convection heat transfer coefficient

flow expense

heat dissipating capacity

and the average temperature of heat surface

the result indicated that the fin structure of flat wave-finned tube could be further optimized and the flat vertical-finned tube is more efficient in condensation.The simulating result provided a scientific basis for designing and optimizing of direct air cooled condenser.