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What are the standards for flat heat exchangers
Apr 10, 2019

The heat transfer efficiency of the plate heat exchanger is to improve the heat transfer coefficient and the logarithmic uniform temperature difference, and the plate is thickened to improve the pressure bearing capacity of the heat exchanger. The method should adopt a reverse flow arrangement to make the temperature of the cold medium heat exchanger higher, and ensure that the temperature of the cold medium after the heat exchanger outlet is merged can meet the design requirements.

 

The effectiveness of flat heat exchangers is a manifestation of comprehensive economic benefits and should be determined through technical and economic comparisons. Heat exchanger bypass pipes can be set up with symmetrical or asymmetrical, single-flow or multi-flow plate heat exchangers, but should be calculated with specific heat. Under the condition of satisfying the pressure bearing capacity of the heat exchanger, the thickness of the small plate should be selected as much as possible, and the mixed flow pattern should be combined in multiple processes, and the uniform heat transfer temperature difference is slightly lower.

 

When the flow rate of the cold heat medium is relatively large when the asymmetric flat plate heat exchanger is used, the heat mixed plate can reduce the plate area by using a symmetric single-flow heat exchanger. The hard board and the soft board are combined to form a flow path of three characteristics of high, medium and low to meet the requirements of different working conditions.

 

Because the plate heat exchanger enables the fluid to generate turbulence at a small flow rate, a high surface heat transfer coefficient can be obtained, and the surface heat transfer coefficient is related to the geometry of the plate and the active state of the medium.www.wxlsshzb.com


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