Технические характеристики сетчато-поточного теплообменника
The main types of plate heat exchangers produced by Anchor-Teploenergo include: classic collapsible, soldered, welded and collapsible shell heat exchangers. The plate corrugations of such products form channels of complex shape, with varying height along the entire length of the plate. In fact, this complex shape can be called a wave.
Characteristics describing heat exchanger mesh plates include the following: the angle of inclination of the corrugation, the height of the channel and the method of formation of the channels.
Different angle of inclination of the corrugation is characteristic for collapsible ones. Variants using plates with an angle of corrugation from 30° to 120° are possible. This indicator affects the efficiency of heat transfer and reduction of head. If the angle is 30°, the losses will be minimal, but at the same time the efficiency will also be minimal. As the angle increases, the pressure loss will increase, but the efficiency will also increase.
In conventional devices, the channel is formed of two plates. That is, in essence, the height of the channel is the height of the corrugation of the two plates together. This value can vary in all types of net-flow heat exchangers. It mainly affects the flow rate and, consequently, the heat transfer rate and pressure drop. The lower the height, the higher the velocity, the more efficient the plate will be. However, the head loss will increase because of this. On the other hand, the higher the corrugation, the slower the flow will be. And therefore the pressure drop will be lower.
There are essentially three methods of formation: with the help of gaskets, solder or welding. Gaskets are mostly for collapsible apparatuses. In welded heat exchangers, the plates are welded together around the perimeter to form sections. They are then welded along the manifold opening to form a package. Solder, on the other hand, is used in the manufacture of brazed ones.
