Ejector Design Calculation Xls

Assuming a compressible gas like steam, the motive fluid reaches sonic velocity ( ) at the nozzle throat. The throat area ( Atcap A sub t ) is calculated using the critical flow equation:

Assuming the following input parameters:

The Ar is the single most important design parameter. You can determine the optimal Ar using empirical correlations derived from manufacturer data or from published models. ejector design calculation xls

You might ask: Why not use commercial CFD or dedicated software like Aspen EDR?

First, convert units:

The diffuser must compress the mixed fluid from the mixing pressure back to the discharge pressure ( Pdcap P sub d

Assuming typical steam ejector design with choked flow, the Excel formula for Aₜ would be: Assuming a compressible gas like steam, the motive

An ejector consists of four main parts:

The search for is not about finding a lazy shortcut. It is about finding a transparent, iterative, engineering-driven tool that respects the laws of gas dynamics while giving you immediate feedback on geometry changes. You might ask: Why not use commercial CFD

For , condensable mixtures , or non-ideal gases , switch to:

A well-structured spreadsheet contains the following :