For a gas ejector, the spreadsheet must determine if the flow is critical (sonic) or supercritical.
If you prefer a pre-built sheet, look for these files: ejector design calculation xls fixed
To develop a "fixed" version of an Ejector Design Calculation XLS For a gas ejector, the spreadsheet must determine
Here's an outline of the key calculations and formulas that can be included in an Excel-based ejector design calculation: Elias had run every CFD simulation in the
w=ṁeṁpw equals the fraction with numerator m dot sub e and denominator m dot sub p end-fraction ṁem dot sub e = mass flow rate of entrained vapor ( ṁpm dot sub p = mass flow rate of motive steam (
For weeks, the plant’s vacuum system had been underperforming. The steam ejector, meant to pull a vacuum on the main distillation column, was failing to reach its design critical back pressure. Elias had run every CFD simulation in the book, but the real-world results were stubbornly off by 15%.