Ejector Design Calculation Xls Fixed [best] -

Building a spreadsheet is half the battle; the other half is making it work correctly.

Rm=msmm=f(PdPs,PmPs,η)cap R m equals the fraction with numerator m sub s and denominator m sub m end-fraction equals f of open paren the fraction with numerator cap P sub d and denominator cap P sub s end-fraction comma the fraction with numerator cap P sub m and denominator cap P sub s end-fraction comma eta close paren Pdcap P sub d = Discharge pressure Pscap P sub s = Suction pressure Pmcap P sub m = Motive pressure = Component efficiency (typically for nozzles) Step 3: Sizing the Nozzle Throat ( Atcap A sub t

) for high-pressure steam. Steam near the saturation line behaves as a real gas, and its specific heat ratio changes drastically during expansion.

Are the formula cells permanently locked and password protected , leaving only the Input Panel fields editable? (This keeps the XLS "fixed" and safe from accidental corruption). ejector design calculation xls fixed

By structuring your workbook cleanly and protecting your core thermodynamic cells with error-handling functions, your fixed-geometry ejector XLS sheet will serve as a fast, reliable tool for preliminary engineering design and troubleshooting. If you want to refine this model, tell me:

): Use empirical curves or an analytical formulation to determine ERcap E cap R

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 Building a spreadsheet is half the battle; the

When users report a "broken" XLS design sheet, the root cause is usually broken references or unconverged loops. Resolving #NUM! and #VALUE! Errors

To ensure this template meets your exact engineering requirements, tell me: What and suction gas are you designing for?

Before opening a spreadsheet, one must understand the four distinct zones within an ejector. A robust calculation sheet must segment the math into these four stages: Are the formula cells permanently locked and password

(using NIST or ideal gas approximations)

Assuming isentropic expansion through the motive nozzle, the fluid velocity hitting the mixing zone is:

ER=ERstd×Wmw×Wtempcap E cap R equals cap E cap R sub s t d end-sub cross cap W sub m w end-sub cross cap W sub t e m p end-sub ERstdcap E cap R sub s t d end-sub = Standard entrainment ratio for air/water vapor. Wmwcap W sub m w end-sub = Molecular weight correction factor ( 29/MWsthe square root of 29 / cap M cap W sub s end-root Wtempcap W sub t e m p end-sub = Temperature correction factor. Step 2: Nozzle Throat Sizing The nozzle throat area ( Atcap A sub t

If you are building or auditing an Ejector Design XLS, it should contain the following specific tabs or sections.

Version control, definitions of terms, and calculation boundaries. 2. Fluid Databank Fixed properties: Molecular weights, values, and Antoine equation constants for steam. 3. Design Inputs Cells for user data: Pressures ( ), Temperatures, and Mass flow rates. 4. Core Engine