Evaporation with heat integration

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GENERAL INFORMATION

Many heat exchangers used in the drying process are also suitable to be used in the evaporation process. Most commons are shell-and-tubes heat exchangers.


TECHNOLOGY DESCRIPTION, TECHNIQUES AND METHODS

Shell and tube heat exchangers

The shell and tube heat exchangers is configured as a bundle of tubes inside a shell. Specific forms differ according to the number of shell and tubes passes. Baffles are installed inside the shell to increase the convection coefficient and improve the heat transfer between fluids. The tubes are supported by the baffles and this way vibration due to the fluid circulation is reduced.


Shell and tubes heat exchanger.jpg

Illustration 1: Shell and tubes heat exchanger [1]


The shell construction allows this heat exchanger to be suited for higher-pressure applications. One fluids runs along the tubes and the other fluid runs over the tubes, conducted by the baffles and increasing the heat convection. The cross section of the inner tubes is rounded and the geometrical construction characteristics depends on the requirements of the heat exchange (pressure, temperature, flow rate, fluid, etc.)

Some configurations of the shell and tube heat exchanger are shown below:

Shell and tubes heat exchanger 2.jpg

Illustration 2: Shell and tubes heat exchanger [2]


Shell and tubes heat exchanger 3.jpg

Illustration 3: Shell and tubes heat exchanger [3]




REFERENCES

[1] Fundamentals of heat and mass transfer. Incropera, DeWitt, Bergman, Lavine

[2] Fundamentals of heat and mass transfer. Incropera, DeWitt, Bergman, Lavine

[3] Heat exchanger handbook. 2on edition. KuppanThulukkanam


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