Working principle
A heat exchanger, also known as a heat exchanger, is a device that transfers a portion of the heat from a hot fluid to a cold fluid.
Release time:
2026-01-26
A heat exchanger, also known as a heat exchanger, is a device that transfers a portion of the heat from a hot fluid to a cold fluid.
working principle
Heat exchangers work based on thermodynamic principles, where heat is always transferred from high-temperature objects to low-temperature objects. There are three main ways of heat transfer: conduction, convection, and radiation. In heat exchangers, conduction and convection usually play a major role, while radiation has a relatively small impact.
Classification
Classified by heat transfer principle:
Inter wall heat exchanger: Two fluids with different temperatures flow in a space separated by a wall, and heat is transferred through heat conduction and convection of the fluid on the wall surface, such as shell and tube heat exchangers, which are the most widely used heat exchangers.
Regenerative heat exchanger: A heat storage body composed of solid material that transfers heat from a high-temperature fluid to a low-temperature fluid. There are rotary and valve switching types.
Fluid connected indirect heat exchanger: Two surface heat exchangers are connected by a circulating heat carrier, which circulates between the high-temperature fluid heat exchanger and the low-temperature fluid to achieve heat transfer.
Direct contact heat exchanger: also known as a hybrid heat exchanger, two fluids come into direct contact and mix with each other for heat exchange, such as in cold water towers, gas condensers, etc.
Duplex heat exchanger: It has two heat transfer methods: indirect steam water surface heat transfer and direct water water mixed flow heat transfer.
Classified by purpose: can be divided into heaters, preheaters, superheaters, evaporators, etc.
Classified by structure: it can be divided into floating head heat exchangers, fixed tube plate heat exchangers, U-shaped tube plate heat exchangers, plate heat exchangers, etc.
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