HTRI small problem
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Those of you who are familiar with HTRI calculations: what does the star next to the value 40.79 in the results represent?
There are annotations at the bottom of the table: ~ + The frequency ratios are based on the lowest natural or acoustic frequency. * Items marked with an asterisk exceed a conservative lower limit for vibration-free design. Review your case using the procedure described in Online Help; you may find that a vibration problem is unlikely. Items with asterisks are likely to cause vibrations in the tube bundle, and corresponding adjustments are necessary~
Reply to 2# yy0209-hc: Could you show me a screenshot of the entire table? Thank you
This is probably an indication that the temperature calculated by the software is different from the temperature you entered earlier. . . .
Oh, right, I didn’t look closely enough before; thanks for pointing that out. Here, the difference between the temperature calculated and the input temperature is quite large
I have worked on projects involving phase transitions before; the temperature wasn’t an issue, but the vapor fraction obtained differed from what was expected, so I marked a star next to the vapor fraction value
Items marked with an asterisk indicate that there is vibration in your piping, which needs to be addressed.
It depends on your pressure drop; when phase change occurs, pressure has a significant impact on the vaporization fraction, so the pressure drop needs to be taken into account. . .
This post was last edited by zfmamx on 2012-8-9 at 15:32; all the results calculated in the second item are included.
Could you share how it was solved:handshake