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Heat exchangers can be classified according to their use

A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, that is, water or other medium is placed in a large closed container, and a pipe is passed through the container. Let hot water flow through the pipe.

Due to the temperature difference between the hot water in the pipe and the hot and cold water in the container, heat exchange is formed, which is the thermal balance of the junior high school. The heat of the high temperature object is always transferred to the low temperature object, thus the heat of the water in the pipe is exchanged to the container. The cold water inside, the heat exchanger is also called the heat exchanger.

Heat exchangers can be classified according to their use:

Coolers, condensers, heaters, heat exchangers, reboilers, steam generators, waste heat (or waste heat) boilers.

According to the heat exchange method can be divided into:

Direct contact heat exchangers (also known as hybrid heat exchangers), regenerative heat exchangers and partition wall heat exchangers.

The direct contact exchanger relies on direct contact between cold and hot fluids for heat transfer. This heat transfer mode avoids the thermal resistance of the heat transfer partition and its sides. As long as the contact between the fluids is good, there is a large The rate of heat transfer.

In the case where the fluids are allowed to mix with each other, a hybrid heat exchanger such as washing and cooling of gas, cooling of circulating water, mixed heating between steam and water, condensation of steam, and the like can be employed. It is used in chemical and metallurgical companies, power engineering, air conditioning engineering, and many other manufacturing sectors.

Commonly used hybrid heat exchangers are: cooling towers, gas scrubbers, jet heat exchangers, and hybrid condensers.