The heat transfer and flow characteristics of rotary air preheater is closely related to the type of the heat storage element

in which the NF-type enamel heat storage elements can be used in the cold end of rotary air preheater.However

the heat transfer and flow characteristics requires further study.The experimental system was built up for studying the heat transfer and flow characteristics of the heat storage element.By switching the damper periodically

the cold and hot air scours the storage element alternately

thus the unsteady heat transfer process of rotary air preheater is simulated.Through experimental study on change rules of the NF-type enamel heat storage elements' Nusselt number

pressure drop and drag coefficient with different Reynolds numbers

the NF-type enamel heat storage elements' fitting formulas of heat transfer characteristics and flow characteristics were obtained.