The motor must overcome mechanical losses from the gearbox and shaft seals.
Generate radial flow. Best for gas-liquid dispersion and high-shear applications.
NRe=ρ⋅N⋅D2μcap N sub cap R e end-sub equals the fraction with numerator rho center dot cap N center dot cap D squared and denominator mu end-fraction is rotational speed (rps) and is impeller diameter (m). : Fully turbulent flow. : Laminar flow. Power Number ( Npcap N sub p
The operational speed should be at least or 30% above the first critical speed. Excel sheets use the Rayleigh-Ritz method to solve for Nccap N sub c
A reliable repack seamlessly toggles between Metric (SI) and US Customary units without breaking downstream mechanical calculations. agitator design calculation xls repack
P = Kp * μ * N² * D³ (where Kp is the laminar power constant).
| Input Category | Required Data | Output Category | Calculated Results | | :---------------------- | :----------------------------------------------------------------------------------------------------------------- | :-------------------- | :----------------------------------------------------------------------------------------- | | [5†L17-L18] | Diameter, cylindrical height, liquid fill level, total volume | Hydraulic Results | Reynolds Number, Power Number, Power Requirement (kW/HP), Pumping Capacity | | Fluid Properties [5†L19] | Density ($\rho$), Viscosity ($\mu$) | Mechanical Results | Shaft Diameter, Torque, Hub Weight, First Critical Speed (RPM) | | Agitator Data [5†L18] | Agitator type (e.g., pitched-blade turbine), impeller diameter, shaft speed (RPM) | Operational Data | Mixing Intensity, Volumetric Flow Rate, Number of Agitators Required |
based on shaft material elasticity, length, diameter, and impeller weight. 5. Structuring the Excel Workbook (XLS Repack Layout)
The agitator design calculation XLS repack is a spreadsheet tool used to calculate and design agitators for various applications. The tool is based on the ASME (American Society of Mechanical Engineers) guidelines and takes into account various parameters such as: The motor must overcome mechanical losses from the
The Reynolds number determines whether the mixing regime is laminar, transitional, or turbulent.
An typically automates these formulas: Agitator Power Requirement: (for turbulent flow) Motor Power Sizing: is efficiency) Mixing Intensity: Calculated as power per unit volume ( ) or tip speed ( 4. How to Use the Agitator Design Calculation Spreadsheet
Drop-down menus for hydrofoil, pitched blade, anchor, or Rushton.
For shear-sensitive applications (like crystalline structures or biological cultures) or shear-intensive applications (like emulsification), the impeller tip speed is a vital metric: NRe=ρ⋅N⋅D2μcap N sub cap R e end-sub equals
) or you need to add to your sheet. Share public link
Need a specific template? Comment below or reach out for a curated list of verified agitator spreadsheets (no malware, no broken links).
P=Np⋅ρ⋅N3⋅D5cap P equals cap N sub p center dot rho center dot cap N cubed center dot cap D to the fifth power In the laminar regime (
Industrial mixing is a critical unit operation across the chemical, pharmaceutical, food, and water treatment industries. Designing an efficient agitator requires balancing fluid mechanics, mechanical stress, and process requirements. While complex Computational Fluid Dynamics (CFD) software offers deep insights, a robust spreadsheet-based tool—such as an —remains the go-to utility for process engineers to perform rapid, accurate sizing and validation.
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