Ejector Design Calculation Xls Jun 2026

R=WsWm≈PsPd⋅f(velocities)cap R equals the fraction with numerator cap W sub s and denominator cap W sub m end-fraction is approximately equal to the square root of the fraction with numerator cap P sub s and denominator cap P sub d end-fraction end-root center dot f of open paren velocities close paren 6. Conclusion

ARM = 12.5 (from interpolation)

Designing an efficient ejector involves complex thermodynamic and fluid dynamic equations, often requiring iterative methods. Creating an spreadsheet is the most efficient way to automate these calculations, optimize geometry, and analyze performance across varying conditions.

Offers specialized design software and demo programs specifically for gas and steam ejector performance prediction. ejector design calculation xls

| Parameter | Symbol | Unit | |-----------|--------|------| | Motive fluid pressure (inlet) | P₁ | bar, psi | | Suction fluid pressure | P₂ | bar, psi | | Discharge (back) pressure | P₃ | bar, psi | | Motive fluid flow rate | W₁ | kg/h, lb/h | | Suction fluid flow rate | W₂ | kg/h, lb/h | | Motive fluid density | ρ₁ | kg/m³ | | Suction fluid density | ρ₂ | kg/m³ | | Entrainment ratio | R = W₂/W₁ | dimensionless |

Derived from the combined mass flow of motive and entrained fluids. Available XLS and Software Resources

An is a practical, lightweight tool for engineers to quickly size ejectors for gases, vapors, or liquids. While not a replacement for rigorous simulation, it provides reliable first estimates, facilitates design reviews, and serves as an excellent teaching aid. For final detailed engineering, manufacturer validation and CFD are still recommended. While not a replacement for rigorous simulation, it

Generate a matrix:

The mixing section diameter is: [ D_2 = \sqrt\frac4 \times A_2\pi \approx 0.0237 \text m = 23.7 \text mm ]

Use the critical flow equation to determine the minimum area required to pass the required motive steam. Calculate Motive Velocity ( Vmcap V sub m it provides reliable first estimates

Design a steam ejector to evacuate air from a condenser.

Uses a linear or polynomial correlation with specific constants (labeled A through J). Non-Choked Flow (

First, calculate the Target Entrainment Ratio: [ Er = \frac\dotm_s\dotm_p = \frac100 \text kg/h500 \text kg/h = 0.2 ]

ARM = 0.98 * (CR)^(-0.5) * (P_m/P_s)^0.3 ' Approximate – replace with your digitized data