⚠️ Very few Excel spreadsheets use full CFD or rigorous two-phase flow models.
However, designing or sizing an ejector is notoriously complex. It involves high-velocity gas dynamics, compressible flow, entrainment ratios, and empirical correction factors. This is where the engineer’s best friend—Microsoft Excel—comes into play. An tool transforms a tedious manual iteration process into an efficient, transparent, and reusable engineering asset.
Most Excel-based ejector calculators rely on: Ejector Calculation Excel
In Excel: =0.65 * (B2/B4)^(-0.55) * (2*B4/B4)^(-1.2)
: Calculations must account for suction pressure, motive pressure, and discharge pressure. 2. Structuring the Spreadsheet ⚠️ Very few Excel spreadsheets use full CFD
If you are performing a quick preliminary check rather than a full mechanical design, you can use these standard steam consumption values : 2–5 kg steam per kg of suction. Two-stage: 5–10 kg steam per kg of suction. Three-stage: 10–15 kg steam per kg of suction. 5. Troubleshooting with Excel
±20–40% for steam ejectors at design point Use case: Feasibility study, educational, rough sizing Not suitable for: Final engineering design, performance guarantee, off-design analysis 3. Adding Advanced Functionality
: Summary tables showing the required steam consumption and expected performance curves. 3. Adding Advanced Functionality