To develop a "fixed" version of an Ejector Design Calculation XLS

The spreadsheet performs the following sequential calculations based on the HEI (Heat Exchange Institute) standards: Entrainment Ratio (

What are your specific (e.g., steam, air, hydrocarbons)? What operating pressures are you targeting?

This is where most spreadsheets break. To avoid circular references, calculate velocity directly.

A diverging section that slows down the mixed fluid, converting kinetic energy back into static pressure energy to reach the required discharge pressure. 2. Fundamental Governing Equations

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Many downloaded ejector design spreadsheets are unprotected, have broken macros, or use circular references that crash Excel. The Solution: Build your own fixed calculator using the standard Constant Area Mixing (CAM) model.

Unlike variable-orifice ejectors that use a moving needle to adjust flow, a has a set nozzle diameter and throat area.

The theoretical velocity of the motive fluid leaving the nozzle is calculated assuming isentropic expansion:

Ejector design relies heavily on thermodynamics and fluid mechanics, specifically the conservation of mass, momentum, and energy. The process is divided into three functional zones:

w=A⋅ErB⋅PeCD⋅H+I⋅Pp⋅G⋅PcJw equals the fraction with numerator cap A center dot cap E r to the cap B-th power center dot cap P sub e to the cap C-th power and denominator cap D center dot cap H plus cap I center dot cap P sub p center dot cap G center dot cap P sub c to the cap J-th power end-fraction (Constants

Are you getting any specific (like #NUM! , #VALUE! )? I can provide the exact Excel syntax to patch your sheet.

Ejector Design Calculation Xls Fixed |best|