板翅式空气冷却器气动除霜的理论探析

The theoretical research on pneumatic defrosting of Plate-fin air cooler

在气动除霜实验的基础之上 ,运用气体动力学理论、边界层理论 ,对气动除霜的机理进行了探析 ,指出当气流动力作用大于霜层与翅片的粘附功时 ,霜层被吹离翅片表面 .

The method of pneumatic defrosting breaks through the traditional meaning of “melting”, and it is a newly developed defrosting method. In this paper, based on experiments and with the application of the theory on gas dynamics、boundary layer theory, the mechanism of pneumatic defrosting on plate fin air cooler is studied theoretically. And it is pointed out that when the drive of airflow is greater than the adhesion work of frost, frost will be eliminated.