What are the types of heat exchangers?

Heat exchangers suitable for different media, operating conditions, temperatures, and pressures come in various structural forms. The specific classifications of heat exchangers are as follows: I. Classification by heat transfer principle 1. Shell-and-tube heat exchangers In shell-and-tube heat exchangers, two fluids with different temperatures flow in spaces separated by a wall; heat transfer occurs between these fluids through heat conduction through the wall and convection of the fluids at the wall surface. Partitioned heat exchangers include shell-and-tube, double-pipe, and other types of heat exchangers. The partitioned heat exchanger is the most widely used type of heat exchanger at present. 2. Regenerative heat exchangers: These heat exchangers use a regenerator made of solid materials to transfer heat from a high-temperature fluid to a low-temperature fluid. The hot fluid first heats the solid material to a certain temperature, after which the cold fluid is heated through this same solid material, thereby achieving heat transfer. Regenerative heat exchangers include rotary types, valve-switching types, and others. 3. Fluid-connected indirect heat exchangers: Fluid-connected indirect heat exchangers are types of heat exchangers that connect two surface-type heat exchangers through a heat transfer fluid that circulates within them. This heat transfer fluid circulates between the high-temperature fluid side and the low-temperature fluid side, absorbing heat from the high-temperature fluid and releasing it to the low-temperature fluid. 4. Direct contact heat exchangers, also known as mixed-flow heat exchangers, are devices in which two fluids come into direct contact with each other and mix to facilitate heat exchange; examples include cold water towers and gas condensers. 5. Double-effect heat exchanger: A device that combines both steam-water surface indirect heat exchange and direct water-water mixed-flow heat exchange. Compared with surface-type indirect heat exchange using steam, it features higher heat exchange efficiency ； Compared to direct mixing and heat exchange with soda water, it offers higher stability and lower machine noise. II. Classification by purpose 1. Heaters A heater is a device that heats a fluid to the desired temperature, without causing any phase change in the fluid. 2. Preheater: The preheater preheats the fluid, providing standard process parameters for the operational procedures. Heat exchanger Heat exchanger 3. Superheater: A superheater is used to heat a fluid (process gas or steam) to a superheated state. 4. Evaporator: The evaporator is used to heat a fluid to a temperature above its boiling point, causing the fluid to evaporate; generally, a phase change occurs. III. Classification by structure: They can be divided into floating-head heat exchangers, fixed-tube-sheet heat exchangers, U-tube sheet heat exchangers, plate heat exchangers, etc.

Manufacturing structures: fixed-tube-sheet heat exchangers, floating-head heat exchangers, baffle-rod heat exchangers, U-tube heat exchangers. . . .

Plate heat exchangers, finned heat exchangers (air coolers)

There are also regenerative heat exchangers (rotary air preheaters in power plants)

Direct contact heat exchanger, Regenerative heat exchanger, Shell-and-tube heat exchanger, Intermediate carrier heat body heat exchanger, Plate-type heat exchanger

Our specialty is brazing, specifically for detachable plate heat exchangers. You can contact Mr. Yang at 18274574481

There are all kinds of technological developments, and they’re all worth learning*

Everyone is just writing text (probably copied as well); could there be a picture or file providing a systematic introduction? ?

Did the original poster create these categories themselves? It’s so messy

Tube fins are used frequently in air-cooled heat exchangers