What to do if the axial force on the heat exchange tubes of a floating-head heat exchanger is too high?
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What to do if the axial stress of the heat exchange tubes in a floating-head heat exchanger exceeds the allowable stress? The process does not allow adjustment of the baffle spacing
If it is not allowed to increase the number of baffle plates, then it is certainly also not allowed to add support plates. Then the only option is to increase the thickness of the tube sheet. Increasing the thickness of the tube sheet reduces the elastic support provided by the tubes to the tube sheet (that is, it reduces the value of K). This helps to lower the bending stress in the area where the tubes are mounted on the tube sheet, as well as the deflection of the tube sheet, thereby reducing the axial stress on the tubes.
How are the axial forces in heat exchange tubes generated?
Tube side pressure, shell side pressure, and thermal deformation difference between the heat exchange tubes and the shell.
It occurs due to the mismatched deformation of the tube sheet and tubes under compression. A post was discussed earlier; give it a search.
Help: How to adjust the allowable stress safety factor for heat exchange tubes in SW6?