There are many reasons for the low heat exchange efficiency of plate heat exchangers, because everyone knows that plate heat exchangers have high heat exchange efficiency, which is also one of the reasons why people often choose them.With the use of more and more time, the heat exchange efficiency will inevitably be affected, thus affecting the on-production operation.Therefore, it is important to understand the reasons for the low heat exchange efficiency of plate heat exchangers. The following is my share.
The reasons for the low heat exchange efficiency of Plate heat exchanger can be divided into the following five points:
A, material
Choosing the wrong material will affect the heat transfer area of the Heat Exchanger. Many people often choose the Plate Heat Exchanger with small heat transfer coefficient when choosing the right material, and choose the material with large heat transfer coefficient and small heat resistance.
Second, the velocity of
The difference of liquid velocity in the operation of plate heat exchanger will also affect the heat transfer efficiency, and the low flow velocity on one side will lead to the excessive thickness of wall fluid stagnation layer.
Iii. Operation and maintenance
If you encounter heat exchanger fouling, remember to clean up in time, otherwise it will affect the heat transfer effect.
Four, difference in temperature
The temperature difference between the heat source and the cold source is small, which will affect the heat exchange efficiency.
Five, the structure of
In terms of structure, there may be unreasonable phenomena, such as cold and heat source failing to fully contact with the heat exchange area, resulting in large local temperature difference of the heat exchanger, and the heat exchange area failing to be fully utilized.
The above is the plate heat exchanger heat efficiency is low, after knowing the reason is good to solve!Then how to improve the heat transfer efficiency of plate heat exchanger can be started from the following aspects:
Choose the plate with high thermal conductivity
Second, reduce the fouling layer heat resistance
3. Increase heat transfer efficiency
Reduce the gas resistance of heat exchanger
All the above points can improve the heat transfer efficiency of heat exchangers. In this paper, each step and precautions have been explained in detail.
