The classification is as follows:

Classified by heat transfer principle

1. Partition wall heat exchanger

In a partition wall heat exchanger, two fluids with different temperatures flow in a space separated by a wall, and heat is exchanged between the two fluids through the heat conduction of the wall and the convection of the fluid on the wall surface. Partition wall heat exchangers include shell-and-tube heat exchangers, double-pipe heat exchangers and other types of heat exchangers. The partition wall heat exchanger is currently the most widely used heat exchanger.

2. Regenerative heat exchanger

Regenerative heat exchangers transfer heat from high-temperature fluid to low-temperature fluid through a heat storage body composed of solid materials. After the heating medium reaches a certain temperature by heating the solid material, the cold medium is heated by the solid material to reach the heat The purpose of delivery. Regenerative heat exchangers include rotary type and valve switching type.

3. Fluid connection indirect heat exchanger

The fluid connection indirect heat exchanger is a heat exchanger that connects two surface heat exchangers by a heat carrier circulating in it. The heat carrier circulates between the high-temperature fluid heat exchanger and the low-temperature fluid, and receives the high-temperature fluid. Heat, the low-temperature fluid heat exchanger releases heat to the low-temperature fluid.

4. Direct contact heat exchanger

Also known as a hybrid heat exchanger, this type of heat exchanger is a device in which two fluids are in direct contact and mix with each other to exchange heat, such as cold water towers, gas condensers, etc.

5. Duplex heat exchanger

It is equipped with two heat exchange methods: steam-water surface indirect heat exchange and water-water direct mixed flow heat exchange. Compared with steam-water surface indirect heat exchange, it has higher heat exchange efficiency; compared with steam-water direct mixed heat exchange, it has higher stability and lower unit noise.