Ejector Design Calculation Xls File

Store thermodynamic constants and molecular weights here to feed your formulas via VLOOKUP or XLOOKUP . Water/Steam Molecular Weight: 18.02 Air Molecular Weight: 28.97 Universal Gas Constant ( ): 8314.46 Tab 3: Calculations & Dimensions Output

for air), the flow is not choked, and standard sonic mass flow equations will break down. Your XLS must include an IF statement checking for critical pressure ratios. ejector design calculation xls

To build a functional Excel spreadsheet, you must program specific mathematical relationships based on the method or Heat Exchange Institute (HEI) standards. The Entrainment Ratio ( Store thermodynamic constants and molecular weights here to

While 1D models are fast, they lack accuracy for complex geometries. Modern approach: To build a functional Excel spreadsheet, you must

If you design multiple ejectors for different clients, log each design in a database sheet and analyze trends (e.g., which CR range gives highest efficiency).

rc=(2k+1)kk−1r sub c equals open paren the fraction with numerator 2 and denominator k plus 1 end-fraction close paren raised to the the fraction with numerator k and denominator k minus 1 end-fraction power ) is the specific heat ratio of the gas. For steam, ; for air, The mass flow rate through the choked nozzle throat ( Atcap A sub t ) is calculated using: