Ejector Design Calculation Xls Jun 2026

: The mixing section dimension required to handle the combined mass flow. Performance Metrics Isentropic Efficiency

A standard engineering spreadsheet for ejectors follows these sequential steps: : Motive Pressure ( Ppcap P sub p ) : High-pressure steam or fluid entering the nozzle. Suction Pressure ( Pecap P sub e ) : Low-pressure entrained vapor. Discharge/Exit Pressure ( Pccap P sub c ) : Pressure at the condenser or outlet. Calculate Ratios : Expansion Ratio ( Ercap E sub r = ) : Determines how much the motive fluid can expand. Compression Ratio ( Crcap C sub r = ejector design calculation xls

Based on constant gas/vapor flow theory (or incompressible liquid jet theory): : The mixing section dimension required to handle

❌ Assumes ideal gas or constant density – not for two-phase flow. ❌ Empirical area ratio tables may not cover all ranges. ❌ No geometric optimization (e.g., nozzle spacing, diffuser angle). ❌ Does not predict off-design performance well. Discharge/Exit Pressure ( Pccap P sub c )

Ejectors (or jet pumps) are passive fluid handling devices that use a high-pressure motive fluid to entrain and compress a secondary fluid. Their design involves iterative thermodynamic and fluid dynamic calculations. This paper presents a systematic methodology for ejector design calculation implemented in Microsoft Excel (XLS). The spreadsheet tool integrates key design parameters: entrainment ratio, area ratios, Mach number constraints, and pressure recovery. Validation against literature data shows agreement within ±5% for critical operating points. The tool enables rapid parametric studies without specialized software.

This paper provides critical semi-empirical correlations for calculating the entrainment ratio (