Classification of heat transfer principles in heat exchanger manufacturers

Time2024-11-20

Surface heat exchangers are devices where two fluids at different temperatures flow in a space separated by a wall. Heat transfer occurs through the conduction of the wall and the convection of the fluids at the wall surface. Surface heat exchangers include shell-and-tube, double-pipe, and other types of heat exchangers.

Heat exchangerClassification by heat transfer principle

1. Surface heat exchanger: A surface heat exchanger is where two fluids at different temperatures flow in a space separated by a wall, transferring heat through the wall's conduction and the fluid's convection at the wall surface. Surface heat exchangers include shell-and-tube, double-pipe, and other types of heat exchangers.

2. Thermal storage heat exchanger: A thermal storage heat exchanger transfers heat from a high-temperature fluid to a low-temperature fluid through a thermal storage medium made of solid material. The hot medium first heats the solid material to a certain temperature, and then the cold medium passes through the solid material to be heated, achieving the purpose of heat transfer. Thermal storage heat exchangers include rotary and valve-switching types.

3. Fluid-connected indirect heat exchanger: A fluid-connected indirect heat exchanger connects two surface heat exchangers through a circulating heat carrier. The heat carrier circulates between the high-temperature and low-temperature fluid heat exchangers, absorbing heat in the high-temperature fluid heat exchanger and releasing heat to the low-temperature fluid in the low-temperature fluid heat exchanger.

4. Direct contact heat exchanger: A direct contact heat exchanger is a device where two fluids come into direct contact for heat exchange, such as cooling towers and gas condensers.

Classification of heat exchangers by purpose

1. Heater: A heater heats a fluid to the necessary temperature without causing a phase change in the heated fluid.

2. Preheater: A preheater heats a fluid in advance to provide standard process parameters for operational procedures.

3. Superheater: A superheater is used to heat a fluid (process gas or steam) to a superheated state.

4. Evaporator: An evaporator is used to heat a fluid to a temperature above its boiling point, causing the fluid to evaporate, generally involving a phase change. Classification by the structure of heat exchangers includes: floating head heat exchangers, fixed tube sheet heat exchangers, U-tube heat exchangers, plate heat exchangers, etc.

Keyword： Classification of heat transfer principles in heat exchanger manufacturers

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