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# Is the plate heat exchanger gasket important for the average temperature difference? _

by：DIGUANG     2021-04-23
Is the plate heat exchanger gasket important for the average temperature difference?

2020-11-06 17:01
231 plate heat exchanger gasket is a circular ring made of a material that can produce plastic deformation and has a certain strength. It is suitable for occasions where the temperature of water vapor is lower than 450℃, the temperature of oil is lower than 350℃, and the pressure is lower than 5MPa. Therefore, the average temperature difference is more important. Is temperature difference important? 1. Calculate the unknown temperature or flow rate, calculate the unknown temperature or flow rate through the heat balance equation, and calculate the heat load Q at the same time. 2. Select the plate model, and select the plate model according to the amount of heat exchange and flow rate. The choice of plate model depends on the specific working conditions. When the flow rate is large and the pressure drop is low, the plate type with lower resistance should be selected; otherwise, the plate type with a slightly larger resistance coefficient can be used. 3. Estimate the heat exchange area, and calculate the approximate heat exchange area based on the heat exchange amount. 4. Select the flow and the number of channels, initially select the cold and hot fluid flow and the number of channels, and calculate the flow rate from this. 5. Find the average temperature difference. 6. To find the convective heat transfer coefficient and total heat transfer coefficient, first obtain the convective heat transfer coefficients of cold and hot fluids respectively, so as to calculate the total heat transfer coefficient. 7. Calculate the required heat exchange area. 8. Go back and calculate the heat exchange area. 9. Check the pressure drop. The allowable pressure drop is often a limiting factor in the design of the plate heat exchanger. However, the design always requires sufficient allowable pressure drop. If the relationship between heat transfer load, flow rate and allowable pressure drop cannot be coordinated no matter how the process layout is changed, only inefficient design schemes can be made. If in the design, the satisfactory design scheme is not always obtained, you can consider changing the board type. Today, the editor shared with you that is the plate heat exchanger gasket important for the average temperature difference? If you have any questions about the gasket of the plate heat exchanger, the official website of Diguang Heat Transfer welcomes your consultation.
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