
This is mass transfer. The best Excel methods use (Height of a Transfer Unit).
ρg=P⋅MWavgR⋅Trho sub g equals the fraction with numerator cap P center dot MW sub a v g end-sub and denominator cap R center dot cap T end-fraction is the universal gas constant ( 2. Mass Transfer Equilibrium and NTU/HTU Layout
This is the "magic number" for efficiency. For soluble gases or dust, typical ratios range from 0.5 to 3 liters per (4–20 gallons per 1000 Step 3: Size the Tower (Diameter): scrubber design calculation excel best
| | Q (m³/s) | C (kg/m³) | η (%) | ρ (kg/m³) | L (m³/s) | | --- | --- | --- | --- | --- | =(A2 B2)/(C2 D2) |
| Cell | Label | Input/Formula | Description | | :--- | :--- | :--- | :--- | | | Gas Flow Rate | User Input | e.g., 10,000 ACFM | | B3 | Inlet Conc. (ppm) | User Input | e.g., 500 ppm | | B4 | Target Efficiency | User Input | e.g., 99% | | B5 | Packing Type | Drop Down | "2 inch Pall Rings" | | C10 | Packing Factor (F) | =VLOOKUP(B5, PackingTable, 2, FALSE) | Looks up factor from database | | D20 | Flooding Velocity | =(Flood_Calc_Function) | Iterative calculation result | | D21 | Design Velocity | =D20 * 0.7 | 70% of flooding | | D22 | Column Diameter | =SQRT((4 * B2) / (PI() * D21 * 60)) | Final Diameter Output | This is mass transfer
are commonly used for removing gaseous pollutants through absorption. They work by passing contaminated gas upward through a packed section while a liquid solvent flows downward, creating extensive contact between the two phases. These are generally the best choice when you need high-efficiency gas absorption.
Flv=LGρgρlcap F sub l v end-sub equals the fraction with numerator cap L and denominator cap G end-fraction the square root of the fraction with numerator rho sub g and denominator rho sub l end-fraction end-root are the mass flow rates of the liquid and gas, and ρlrho sub l is the liquid density. Flooding Gas Velocity Calculation To calculate the Capacity Parameter ( Cscap C sub s Mass Transfer Equilibrium and NTU/HTU Layout This is
Density and viscosity values indexed by operating temperature. Zone 3: Formula Engine (White Cells)
The Nukiyama-Tanasawa correlation for liquid mean droplet diameter:
Z=HTU⋅NTUcap Z equals cap H cap T cap U center dot cap N cap T cap U
To claim your spreadsheet is "best," it must perform the following seven critical calculations.