Ejector Design Calculation Xls Instant

Ejector design calculations in Excel focus on determining the Entrainment Ratio Area Ratios

Often incorporates logarithmic terms of the pressure ratios to account for subsonic behavior. Geometric Parameters (Area Ratios) : Calculates cross-sectional areas for: Nozzle Throat ( cap A sub 1 Where motive fluid reaches sonic speed. Nozzle Outlet ( cap A sub 2 Optimized for the expansion to suction pressure. Ejector Throat/Mixing Tube ( cap A sub 3 Where motive and suction fluids combine. Specialized Calculators Steam Jet Ejectors : Professional sheets like those from Graham Corporation ejector design calculation xls

Tip: When building your own XLS, always use absolute pressures for ratios, include steam/air table lookups via VLOOKUP, and add a Goal Seek macro to iterate for target entrainment ratio. Ejector design calculations in Excel focus on determining

Create a 2D lookup table on a separate sheet: Built-in steam tables (via VBA user-defined functions) for

Diffuser: A diverging section that converts kinetic energy back into potential energy, raising the pressure of the combined mixture to the required discharge level. Core Formulas in an Ejector Calculation XLS

Step 2: Suction Chamber Mixing

Assume constant pressure mixing (most common) or constant area mixing.
Calculate mixed fluid momentum and energy.

), complex empirical correlations are often used in spreadsheets to predict this ratio based on expansion and compression factors. 2. Compression and Expansion Ratios Compression Ratio ( Crcap C sub r ): The ratio of discharge pressure ( Pccap P sub c ) to entrained vapor pressure ( Pecap P sub e Expansion Ratio ( Ercap E sub r ): The ratio of motive steam pressure ( Ppcap P sub p ) to entrained vapor pressure ( Pecap P sub e 3. Cross-Sectional Area Ratios Excel sheets calculate specific areas at critical points ( A1cap A sub 1 for nozzle throat, A2cap A sub 2 for nozzle outlet, and A3cap A sub 3 for ejector throat) using pressure-based correlations: EPJ Web of Conferenceshttps://www.epj-conferences.org Measurement and calculating of supersonic ejectors