Ejector Design Calculation Xls Fixed High Quality Link

Use VBA macros to pull steam properties automatically so you don't have to input them manually for every pressure change.

Where velocity is converted back into pressure (static head) to reach the discharge requirement.

Wet steam reduces the kinetic energy available at the nozzle, leading to immediate performance loss. ejector design calculation xls fixed

If your suction fluid contains air or CO2, the molecular weight changes, which drastically alters the entrainment ratio.

If you are building or using a "fixed" design XLS, ensure it includes: Use VBA macros to pull steam properties automatically

To build a robust calculation sheet, you must define the following input variables: A. Motive Fluid Properties Usually high-pressure steam or air. Temperature ( Tmcap T sub m ): Needed to determine specific volume. Flow Rate ( Wmcap W sub m ): The mass flow available to do the work. B. Suction Fluid Properties Suction Pressure ( Pscap P sub s ): The vacuum level you aim to maintain. Entrainment Ratio ( ): The ratio of suction gas to motive gas ( ). This is the most critical output of your calculation. C. Discharge Conditions Discharge Pressure ( Pdcap P sub d ): The pressure the ejector must overcome (back-pressure). 3. The Step-by-Step Calculation Process

Mastering Ejector Design: A Comprehensive Guide to Fixed-Geometry Calculations If your suction fluid contains air or CO2,

In the mixing chamber, the motive and suction fluids combine. This is governed by the . Calculation:

Use the isentropic expansion equation to find the Mach number. For steam, the nozzle is typically convergent-divergent (C-D) to achieve supersonic speeds.

This article explores the fundamental engineering principles behind ejector design and how to structure a calculation spreadsheet (XLS) to ensure accurate performance modeling. 1. Understanding the Fixed-Geometry Ejector