Problem:

Users may experience invalid tube layouts or interference between tubes and partition plates.

In this case, when attempting to generate a 10‑pass horizontal U‑tube bundle, the computed bundle layout appear incorrect after clicking Compute, with partition plates overlapping or conflicting with tube positions.

Solution:

Root Cause:

The issue occurs when the Partition Plate checkbox is left enabled during bundle computation.

In APV:

• • • The Partition Plate checkbox indicates a user-defined location
    • When checked, APV does not recalculate or adjust the partition plate location
    • This can cause tube interference or incorrect pass configuration if the location was not explicitly defined by the user

Correct Workflow (Resolution):

Method 1: Automatic Partition Plate Placement (Recommended)

To allow APV to automatically calculate a valid tube and partition plate arrangement, follow the steps below:

1. 1. 1. Uncheck the “Partition Plate” option
         • This allows APV to automatically determine the correct location.
      2. Click Compute to generate the tube bundle.
      3. APV will correctly generate:
         • 10 passes
         • 125 tubes (250 holes) for the U-tube configuration
      4. Review the generated layout.

Notes

• • • • This is the correct and intended workflow, not a workaround.
      • Unchecking the option enables automatic positioning by APV.

Method 2: Manual Partition Plate Placement (User-Defined) 

Use this method when a specific partition plate location is required.

Steps:

1. 1. 1. Open the Bundle Layout.
      2. From the Accessories list on the left side, double-click on “Partition Plates.”
      3. Enable the User Defined option.
      4. Enter the correct location for each partition plate.
      5. Click Compute to generate the updated bundle layout.

Notes

• • • • This is the correct and intended workflow, not a workaround.
      • Unchecking the option enables automatic positioning by APV.

Conclusion:

For multi‑pass horizontal heat exchanger designs, partition plates must be system‑calculated to avoid tube interference. Always ensure the Partition Plate checkbox is unchecked before computing the bundle unless a fully manual placement is intentionally required.

 

See Also

Bentley AutoPIPE Vessel

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