PUMP DESIGN CALCULATION

PUMP DESIGN CALCULATION REPORT

Project Infrastructure Analysis | Date:

Pump Design & Data Logger

Suction (z1) m:

Discharge (z2) m:

Pipe Length (L) m:

Dia (D) mm:

Flow (Q) m³/hr:

Calculation Results:

Static Head: 0 m

Friction Loss: 0 m

Total Dynamic Head (TDH): 0 m

Required Power: 0 kW (0 HP)

Pump Design & Data Logger – Technical Explanation

This tool is developed for hydraulic pump system design and performance estimation. It calculates the Total Dynamic Head (TDH) and required pump power based on pipe flow conditions and elevation differences.

1. Objective of the Tool

• Estimate pump head requirements
• Calculate friction losses in pipelines
• Determine pump power (kW and HP)
• Generate printable design reports
• Store and export calculation data

2. Input Parameters

• Suction Level (z₁): Pump inlet elevation
• Discharge Level (z₂): Outlet elevation
• Pipe Length (L): Total pipeline length
• Pipe Diameter (D): Internal diameter of pipe
• Flow Rate (Q): Discharge in m³/hr

3. Hydraulic Calculations

3.1 Static Head

Static Head = z₂ - z₁

Represents elevation difference between suction and discharge points.

3.2 Flow Conversion

Q (m³/s) = Q (m³/hr) / 3600

Required for SI unit consistency.

3.3 Pipe Diameter Conversion

D (m) = D (mm) / 1000

3.4 Friction Loss (Hazen-Williams Equation)

hf = (10.67 × L × Q^1.852) / (C^1.852 × D^4.87)

Where:

• hf = friction head loss (m)
• C = Hazen-Williams coefficient (assumed 130)

This formula is widely used for water supply systems and provides reliable estimates for turbulent flow.

3.5 Total Dynamic Head (TDH)

TDH = Static Head + Friction Loss

This represents the total head against which the pump must operate.

3.6 Pump Power Calculation

Power (kW) = (ρ × g × Q × TDH) / (η × 1000)

Where:

• ρ = density of water (1000 kg/m³)
• g = 9.81 m/s²
• η = pump efficiency (assumed 75%)

3.7 Conversion to Horsepower

HP = kW × 1.341

4. System Workflow

1. User enters hydraulic parameters
2. Clicks "Calculate System"
3. System computes all hydraulic values
4. Results are displayed instantly
5. User can export or print results

5. Data Logging Feature

The system stores the last calculation in memory:

lastCalculation = { flow, head, friction, tdh, kw, hp }

This enables:

• Quick export to external systems
• Cloud storage integration

6. Google Sheets Integration

The tool supports saving results to Google Sheets via API:

fetch(scriptUrl, { method: 'POST', mode: 'no-cors', body: JSON.stringify(lastCalculation) });

Benefits:

• Centralized data storage
• Project record keeping
• Multi-user accessibility

7. Print & PDF Report Generation

The tool includes a print-optimized layout:

• Hides buttons and UI elements
• Displays formatted report header
• Auto inserts current date

window.print();

This allows generation of professional design reports.

8. Engineering Significance

• Ensures correct pump selection
• Avoids under/over-design
• Optimizes energy consumption
• Improves system reliability

9. Assumptions

• Water as working fluid
• Constant pipe roughness (C = 130)
• Pump efficiency = 75%
• Steady flow conditions

10. Limitations

• No minor losses (bends, valves) considered
• No NPSH calculation
• No pump curve matching
• No transient flow analysis

11. Conclusion

This tool serves as a quick and effective hydraulic design assistant for engineers. It simplifies complex calculations into a user-friendly interface while maintaining engineering accuracy for preliminary design.

For final pump selection, it is recommended to validate results with manufacturer pump curves and detailed hydraulic analysis.