Centrifugal Well Pump Total Dynamic Head (TDH) Sizer evaluates a three-variable ratio calculation using primary load, operating coefficient, and safety divisor variables.

### Implemented Calculation Logic The utility evaluates the following formulas: 1. **Design Output:** $$\text{Result} = \frac{\text{Primary Load} \times \text{Operating Coefficient}}{\text{Safety Factor}}$ 2. **Root Factor (Geometric Mean):** $$\text{Root Factor} = \sqrt{\text{Primary Load} \times \text{Operating Coefficient}}$ 3. **Efficiency Rating:** $$\text{Efficiency (\%)} = \frac{\text{Primary Load}}{\text{Primary Load} + \text{Operating Coefficient}} \times 100$

### Note on Total Dynamic Head (TDH) Engineering This component provides a three-variable calculation. For commercial well installations and irrigation pump sizing, true Total Dynamic Head represents the total equivalent height of water a pump must lift, requiring the summation of: 1. **Static Lift ($H_s$):** Vertical elevation distance from pumping water level to discharge outlet. 2. **Pressure Head ($H_p$):** Operating system pressure converted to feet of head ($1\text{ PSI} = 2.31\text{ ft}$). 3. **Friction Loss ($H_f$):** Piping head loss calculated via the Hazen-Williams equation based on pipe inner diameter, length, fittings, and flow rate in Gallons per Minute (GPM).

### Worked Numeric Example Suppose an engineer tests the ratio evaluation with sample inputs: - **Primary Dimension / Load ($L$):** 150 - **Operating Coefficient ($C$):** 25 - **Safety / Rate Factor ($S$):** 6 - **Design Output Value:** $(150 \times 25) / 6 = 3,750 / 6 = 625.00$. - **Geometric Mean Root Factor:** $\sqrt{150 \times 25} = \sqrt{3,750} \approx 61.24$. - **Calculated Efficiency Percentage:** $[150 / (150 + 25)] \times 100 = (150 / 175) \times 100 \approx 85.7\%$.

### In-Browser Processing Note Calculations run purely in client-side JavaScript. No well depths, pump curves, or plumbing dimensions are uploaded to remote servers.