Calculate the velocity of the motive fluid as it exits the nozzle.
Wet steam reduces the kinetic energy available at the nozzle, leading to immediate performance loss.
In the mixing chamber, the motive and suction fluids combine. This is governed by the . Calculation:
Real-world diffusers aren't perfect. Apply an efficiency coefficient (usually 0.65 to 0.80) to your pressure recovery calculations. Step 4: Check for Critical Flow Ensure the discharge pressure ( Pdcap P sub d
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
Calculate the velocity of the motive fluid as it exits the nozzle.
Wet steam reduces the kinetic energy available at the nozzle, leading to immediate performance loss. ejector design calculation xls fixed
In the mixing chamber, the motive and suction fluids combine. This is governed by the . Calculation: Calculate the velocity of the motive fluid as
Real-world diffusers aren't perfect. Apply an efficiency coefficient (usually 0.65 to 0.80) to your pressure recovery calculations. Step 4: Check for Critical Flow Ensure the discharge pressure ( Pdcap P sub d This is governed by the
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