Method of Reducing Resistance of Plate Heat Exchanger

Method of Reducing Resistance of Plate Heat Exchanger


The way to reduce the resistance of the plate heat exchanger is as follows
1. Multi-process combination
When the hot and cold medium flow is large, you can use multi-process combination of arrangements, small flow side of the use of more processes to improve the flow rate, access to higher heat transfer coefficient. Large flow side uses a smaller process to reduce heat exchanger resistance. Multi-process combination of mixed flow, the average heat transfer temperature difference is slightly lower. The use of multi-process combination of plate heat exchanger fixed end plate and the activities of the end plate are taken over, maintenance workload.
2. The use of asymmetric plate heat exchanger
Symmetrical plate heat exchangers have the same plate on both sides of the plate structure of the same composition, the formation of hot and cold flow channel flow cross-sectional area equal plate heat exchanger. Asymmetric plate heat exchanger according to the heat and heat characteristics of hot and cold fluid pressure and pressure requirements, to change the two sides of the board surface structure, the formation of hot and cold flow cross-sectional area of ​​the plate heat exchanger, wide flow side Angular diameter larger. The heat transfer coefficient of the asymmetric plate heat exchanger is small and the pressure drop is greatly reduced. Hot and cold medium flow is relatively large, the use of asymmetric single-process than the use of symmetric single-flow heat exchanger can reduce the board area of ​​15% -30%.
3. Set the heat exchanger bypass pipe
When the hot and cold medium flow is relatively large, can be in the side of the large flow side of the outlet between the heat exchanger, reducing the flow into the heat exchanger, reducing resistance. For ease of adjustment, a regulating valve should be installed on the bypass pipe. The way should be used counter-current layout, so that the cold medium out of the heat exchanger temperature is high, to ensure that the heat exchanger outlet confluence of cold medium temperature can meet the design requirements. Set the heat exchanger bypass pipe to ensure that the heat exchanger has a higher heat transfer coefficient, reduce the heat exchanger resistance, but slightly adjustable regulation.
4. Plate heat exchanger in the form of choice
5. Use hot mixing plate

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