Ejector Design Calculation Xls: Fixed !!link!!

Ejector Design Calculation — Fixed XLS (Overview & Highlights)

An ejector is a simple, robust fluid-handling device that uses a high-pressure motive stream to entrain and compress a secondary flow. Ejectors are used in refrigeration, vacuum systems, steam systems, and process plants because they have no moving parts, are low-maintenance, and can handle mixed-phase flows. A well-crafted fixed Excel (XLS) calculation workbook captures the essential design steps, lets engineers iterate quickly, and serves as a repeatable record for sizing and performance prediction.

, you need to focus on clear data entry, robust thermodynamic formulas, and an intuitive layout. Below is a structured approach to developing the text and logic for such a spreadsheet. 1. Header & Input Parameters ejector design calculation xls fixed

  • Input: Suction Pressure ($P_s$), Suction Flow rate ($m_s$).
  • Process: The suction fluid accelerates as it approaches the mixing tube.
  • Add a lookup table (e.g., Steam Tables) as a hidden sheet.
  • Use VLOOKUP or INDEX/MATCH for density and enthalpy instead of ideal gas law.
  • For mixtures, add a cell to input molecular weight and compressibility (Z).

To design or evaluate a "fixed geometry" ejector, several critical parameters must be defined: Entrainment Ratio ( Ejector Design Calculation — Fixed XLS (Overview &

Core Concept:

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  • produce a sample Excel layout (sheet names, key formulas, and cell references), or
  • generate a downloadable .xlsx template with the core calculation and charts populated with example values. Which do you prefer?
  1. Check if the nozzle is choked (P_motive / P_suction > 1.83)
  2. Compute the optimum area ratio
  3. Output the motive flow required
  4. Display the actual achievable entrainment ratio