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%.
Where velocity is converted back into pressure (static head) to reach the discharge requirement. ejector design calculation xls fixed
In a fixed spreadsheet, avoid =ITERATION or circular references. Use these direct formulas. For weeks, the plant’s vacuum system had been
In the mixing chamber, the motive and suction fluids combine. This is governed by the . Calculation: Where velocity is converted back into pressure (static
where m_s is the suction fluid mass flow rate and m_m is the motive fluid mass flow rate.
About the author: This guide was compiled using ASME PTC 37, ESDU Data Item 86030, and 12 years of process engineering experience with fixed-format calculation sheets.