Based on one-dimensional compressible flow with normal shock in the mixing section:
The efficiency of an ejector is captured through specific formulas integrated into the XLS cells:
Ejectors are passive devices that use high-pressure motive fluid to entrain and compress a lower-pressure suction fluid. This paper details the empirical and analytical formulas required to automate design in Excel, specifically addressing non-choked flow regimes. 1. Nomenclature & Parameters
The motive fluid entrains the suction fluid. The momentum balance determines the mixing pressure. C. Diffuser Section (Compression) ejector design calculation xls
This paper outlines the fundamental mathematical models and design parameters for a Steam Ejector Design Calculation spreadsheet (XLS). It focuses on the 1-D thermodynamic model used to determine the Entrainment Ratio ( and critical geometric dimensions.
A2A1=1.22×Pc-0.0739×Pp-0.81×wthe fraction with numerator cap A sub 2 and denominator cap A sub 1 end-fraction equals 1.22 cross cap P sub c to the negative 0.0739 power cross cap P sub p to the negative 0.81 power cross w
A well-structured spreadsheet contains the following : Based on one-dimensional compressible flow with normal shock
Define your available motive pressure and the target process vacuum level.
Create a using Excel’s 3D Surface Chart.
This article explores the fundamental principles, key equations, and steps to build a robust ejector design tool in Excel. 1. Why Use Excel for Ejector Design? Nomenclature & Parameters The motive fluid entrains the
focus on vacuum systems for chemical processing, emphasizing steam quality and troubleshooting. Lempor Ejectors
Excel's accessibility makes it a popular platform for building such models. The tools available range from simple, specialized calculators to comprehensive libraries. The following table summarizes some of the resources I uncovered in my research.