Theoretical study on heat and mass transfer in the air-washer

On the basis of relative movement and motive force of the waterdrop , establishes a mathematical model. Deduces a function of velocity of the waterdrop and then gets a formula of overall heat exchange efficiency which is suitable for parallel flow system. Analyses each factor that affect the efficiency. The model together with the analysis is helpful to the design, adjusting, simulation and analysis of such system.