Simple calculation of the nozzle throat diameter, diffuser throat diameter, and condenser diameter of a steam jet pump

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1. Calculation of the nozzle throat diameter D0 (1) Where G0 is the consumption of working steam in kg/h, and G0 = Gh/μ. Gh is the volume of gas being pumped (kg/h), and μ is the impingement coefficient, which can be obtained from tables. 　　P0 – Working steam pressure (Pa). 2. Calculation of the diffuser throat diameter D3: (2) Where GK is the air flow rate passing through the diffuser throat (kg/h), GZ is the steam flow rate passing through the diffuser throat (kg/h), and P4 is the pressure at the diffuser outlet (Pa). 3. Calculation of the condenser diameter D: (3) Where G∑h is the flow rate of the mixture entering the condenser (kg/h), and v∑h is the specific volume of the mixture entering the condenser (m3/kg); this can be approximated by using the specific volume of saturated water vapor obtained from P4. Figure: Simple calculation formulas for the nozzle throat diameter, diffuser throat diameter, and condenser diameter of a jet pump