Design Calculation Xls | Ejector

This guide provides a structured approach to creating an Ejector Design Calculation spreadsheet (XLS). Since ejector design involves complex fluid dynamics and iterative calculus, Excel is an excellent tool for handling the iterations automatically.

• Nozzle throat area (A_t = \fracW_motive\rho_1 \cdot v_t) where (v_t) = sonic velocity if choked.
• Mixing chamber throat area (A_m = A_t \times \text(Area Ratio)).
• Area Ratio (K = A_m / A_t) is looked up from empirical tables (e.g., ASME or ESDU data sheets) based on R, CR, ER.

Spreadsheet calculations are approximate. Always: ejector design calculation xls

A well-structured ejector design XLS typically follows these steps: This guide provides a structured approach to creating

Often incorporates logarithmic terms of the pressure ratios to account for subsonic behavior. Geometric Parameters (Area Ratios) : Calculates cross-sectional areas for: Nozzle Throat ( cap A sub 1 Where motive fluid reaches sonic speed. Nozzle Outlet ( cap A sub 2 Optimized for the expansion to suction pressure. Ejector Throat/Mixing Tube ( cap A sub 3 Where motive and suction fluids combine. Specialized Calculators Steam Jet Ejectors : Professional sheets like those from Graham Corporation Nozzle throat area (A_t = \fracW_motive\rho_1 \cdot v_t)

2D lookup table

Create a on a separate sheet:

• Motive pressure vs. ω
• Suction pressure vs. discharge pressure
• Nozzle efficiency effect