Ejector Design Calculation Xls Fixed 【Top-Rated】

Mastering Ejector Design: A Guide to Calculation Methodology and Spreadsheet Implementation

5. Practical Example: Setting up Goal Seek

Since ejector equations are implicit (the answer depends on the answer), a standard Excel formula often creates a circular reference. Here is how to automate a "Fixed" geometry check:

  1. Set up a cell for "Discharge Pressure Calculated" (using your momentum and diffuser formulas).
  2. Set up a cell for "Discharge Pressure Required" (your fixed input).
  3. Create an "Error Cell" = Required - Calculated.
  4. Go to Data > What-If Analysis > Goal Seek.
    • Set cell: Error Cell (target value 0).
    • By changing cell: Mixing Throat Diameter (or Motive Flow Rate).
  5. Run.

The spreadsheet will iterate the throat diameter until the physics matches the required discharge pressure.

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