Ejectors (also known as eductors or steam jet ejectors) are versatile, reliable vacuum pumps with no moving parts, commonly used in oil and gas, chemical, and power industries. Designing them requires complex fluid dynamics calculations, often involving iterative processes. However, for initial sizing, estimation, or rapid engineering, a is an invaluable tool.
ER=msmmcap E cap R equals the fraction with numerator m sub s and denominator m sub m end-fraction
I can provide the specific cell formulas and layout constraints for your exact process conditions. Share public link
Units: W_m in kg/h, P_m in bara.
): Ratios of nozzle outlet, mixing section, and diffuser areas based on pressure ratios. C. Output and Design Section The final results should present the essential geometry: Mixing Section Diameter Diffuser Exit Diameter Calculated Performance: Predicted entrainment ratio. 3. Creating Your XLSX Spreadsheet Structure Here is a recommended layout for your Excel tool: Formula/Method Inputs User Entry Intermediate Compression Ratio ( Intermediate Expansion Ratio ( Calculation Entrainment Ratio ( (See 1.2.1) Calculation Motive Flow ( Geometry Nozzle Diameter Derived from Geometry Throat Diameter Based on area ratio Result Performance Metrics Summary Table 4. Limitations and Best Practices
When validating your fixed .xls file, watch out for these common engineering template errors:
Using correlations found in industry standards (like those in), the spreadsheet applies fixed equations to determine: Compression Ratio ( ): Entrainment Ratio (
Before trusting the output, your model must be validated. Test the spreadsheet against:
Final designs should be verified by a specialized manufacturer, as they hold proprietary empirical experience.