Ejector Design Calculation Xls Fixed -

A "fixed" calculation sheet typically follows these logical steps: Entrainment Ratio ( Ercap E sub r

Motive Fluid (High Pressure) \ v ________ ___________/ \___________ Suction -> __ Throat Diffuser -> Discharge (Intermediate Pressure) Fluid -> / \___________/ \___ The process occurs in three distinct physical zones:

Instead of manual guesswork, use Excel's built-in tools. ejector design calculation xls fixed

The spreadsheet will iterate the throat diameter until the physics matches the required discharge pressure.

| | | Output Results | | :--- | :--- | :--- | | Motive Fluid (Primary) | Pressure, temperature, mass flow rate, molecular weight, specific heat ratio, viscosity, vapor pressure | Nozzle throat diameter, nozzle exit diameter | | Suction Fluid (Secondary) | Mass flow rate, lift, pressure, temperature, molecular weight, specific heat ratio, viscosity, vapor pressure | Entrainment ratio | | Operating Conditions | Ejector type, back pressure, allowable loss coefficients (for nozzles, diffuser, etc.) | Area ratio, Mach numbers (nozzle exit, suction, mixing section), critical back pressure, discharge pressure & velocity, compression ratio, overall ejector dimensions | A "fixed" calculation sheet typically follows these logical

At=mmCd⋅Pm⋅R⋅Tmγ⋅(2γ+1)γ+1γ−1cap A sub t equals the fraction with numerator m sub m and denominator cap C sub d center dot cap P sub m end-fraction center dot the square root of the fraction with numerator cap R center dot cap T sub m and denominator gamma center dot open paren the fraction with numerator 2 and denominator gamma plus 1 end-fraction close paren raised to the the fraction with numerator gamma plus 1 and denominator gamma minus 1 end-fraction power end-fraction end-root Cdcap C sub d = Discharge coefficient (dimensionless) = Specific heat ratio ( = Individual gas constant ( Tmcap T sub m = Motive temperature ( 3. Structural Design of a Fixed XLS Calculator

The XLS calculates the dimensions of the diffuser, where the high-velocity mix converts back into pressure. Troubleshooting Common "Fixed" XLS Issues Structural Design of a Fixed XLS Calculator The

Every ejector designed with this tool follows the same rigorous methodology.

If the Mach number in the nozzle throat exceeds 1.0, ensure your formulas switch from subsonic to choked-flow equations. If you want to build or refine a specific sheet, tell me:

Fixed, reliable empirical efficiency correlations (e.g., for nozzle efficiency, diffuser efficiency).