Issues regarding parameter input in the SW6 calculation for fixed-tube-sheet heat exchangers
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I am a beginner in the strength design of heat exchangers. When using the SW6 software to calculate fixed-tube-sheet heat exchangers, on the main design parameters page, it is necessary to enter the average value along the length of the heat exchange tubes as well as the average value along the length of the shell. Could someone please tell me how these two temperatures are determined? Thank you for your help
In our company, the average temperature of the cylinder is calculated as the average of the inlet and outlet temperatures, while for the heat exchange tubes, it is determined as the average of the inlet and outlet temperatures plus the average of the cylinder’s average temperature.
Thank you for the advice. . . . . . .
The average shell-side temperature is calculated as the average of the inlet and outlet temperatures, while for the heat exchange tubes it is the average of the inlet and outlet temperatures combined with the average of the cylinder temperature.
You’re welcome. My method isn’t accurate; the correct approach should be to refer to Appendix F, which provides calculations for wall temperature based on 151. The average wall temperature should be shown on the general condition diagram.
Okay, I understand. By the way, the condition diagram you mentioned should include an average wall temperature; is this average wall temperature calculated by the process engineering team?
This average wall temperature is provided by the process engineering team.
The average wall temperature should be specified as a design condition for the process
This post was last edited by HSLJHZ on 2016-2-17 09:50. @HSLJHZ HSLJHZ is absolutely right. Generally, the process engineering department is responsible for providing this wall temperature value. If it is not provided, then if the equipment engineering department obtains the process data sheet related to the heat exchangers from the process engineering department, they can also calculate the wall temperature using the formula provided in GB/T151-2014. The values obtained in this way are relatively accurate; there are also simpler, approximate methods for calculation, which are based on the procedures specified by the company behind HSLJHZ.