Advantages of plate heat exchanger compared with shell and tube heat exchanger
Plate heat exchanger is a type of heat exchanger, which is composed of a series of corrugated metal sheets. What are the advantages of this new type of heat exchanger compared with shell and tube heat exchanger?
What are the advantages of plate heat exchanger compared with shell and tube heat exchanger:
1. High heat transfer coefficient
Plate heat exchanger is a flow channel composed of different corrugated plates inverted each other, so the heat transfer coefficient of fluid passing through the pipeline will be higher, which is 3 to 5 times that of shell and tube type.
2. Large logarithmic average temperature difference and small terminal temperature difference
The fluid in the shell and tube heat exchanger is cross flow, and the average temperature difference coefficient is small, while the plate heat exchanger is cocurrent or countercurrent, so that the temperature difference at the end is small, and the heat transfer to water can be lower than 1 ℃.
3. Small floor area
The plate heat exchanger has a compact structure. The heat exchanger in the volume is 2 to 5 times that of the shell and tube heat exchanger, and the floor area will be much smaller than that of the shell and tube heat exchanger.
4. It is easy to change the heat exchange area or process combination
As long as a few plates are added or reduced, the heat exchange area can be changed accordingly, and the plate arrangement can be changed to reassemble the process.
5. Light weight and low price
The thickness of plate is about 0.4-0.8mm, while that of shell and tube is about 2.0-2.5mm, so it is much lighter than it. Compared with the two heat exchangers with the same material and the same heat exchange area, the price of plate type is about half lower than that of shell and tube type.
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