Ejector design calculation spreadsheets typically include automated formulas to determine the entrainment ratio compression ratio physical dimensions
If you are interested, I can provide the for a specific fluid case (like steam-air vacuum systems), outline the HEI correction factor tables , or explain how to set up an Excel VBA macro to iterate the diffuser dimensions. Let me know how you would like to proceed! Share public link ejector design calculation xls
Slowly expands the flow area, converting the kinetic energy of the mixed stream back into static pressure (discharge pressure). 2. Key Mathematical Formulations for Ejector Design bar a or mmHg) 3.
To build an accurate calculation spreadsheet, you must define the operational parameters of your system. Organize your Excel sheet to capture these primary inputs: Motive Fluid Properties Motive steam pressure ( Pmcap P sub m , bar a or psia) Motive steam temperature ( Tmcap T sub m , °C or °F) or dryness fraction Motive steam mass flow rate ( , kg/h or lb/h) — if predetermined Suction Fluid Properties Suction pressure ( Pscap P sub s , bar a or Torr) Suction temperature ( Tscap T sub s , °C or °F) Total suction gas mass flow rate ( Average molecular weight of suction gas ( MWscap M cap W sub s Specific heat ratio of suction gas ( Discharge Conditions Discharge/Back pressure ( Pdcap P sub d , bar a or mmHg) 3. Step-by-Step Ejector Design Calculations outline the HEI correction factor tables
Excel model is sufficiently accurate for preliminary design.