Ejector Design Calculation Xls Fixed May 2026

Engineering error rate dropped from 18% to 2%. The fixed XLS allowed junior engineers to size ejectors without fear of breaking the model.

w=A⋅ErB⋅PeC⋅PcD⋅exp(E+F⋅ln(Pp))w equals cap A center dot cap E r to the cap B-th power center dot cap P sub e to the cap C-th power center dot cap P sub c to the cap D-th power center dot exp open paren cap E plus cap F center dot l n open paren cap P sub p close paren close paren Ppcap P sub p : Motive steam pressure. Pecap P sub e : Entrained vapor pressure. Pccap P sub c : Discharge pressure. : Expansion Ratio ( : Nozzle Throat ( D2cap D sub 2 ) : Based on motive mass flow and pressure. Mixing Chamber Diameter ( D5cap D sub 5 ) : Typically 8 to 14 times the needle/nozzle diameter. Diffuser Length ( XL6cap X cap L sub 6 ) : Sized to allow flow deceleration and pressure recovery. 🧪 Advanced Modeling (CFD & 1-D) ejector design calculation xls fixed

The nozzle design parameters are calculated using the following equations: Engineering error rate dropped from 18% to 2%

| Check | Formula | OK if | | :--- | :--- | :--- | | P_s < P_d | =IF(P_s >= P_d, "ERROR: Suction > Discharge", "OK") | "OK" | | P_m > P_s × 1.5 | =IF(P_m <= P_s*1.5, "Low Motive Pressure", "OK") | "OK" | | Compression Ratio < 15 | =IF(P_d/P_s > 15, "Needs 2 stages", "OK") | "OK" | Pecap P sub e : Entrained vapor pressure