Hydraulic Institute Engineering Data Book ★ [ Validated ]

Report: Unlocking Hidden Efficiencies – 5 Non-Obvious Lessons from the Hydraulic Institute Engineering Data Book

Prepared for: Pump System Engineers & Designers
Source reference: HI Engineering Data Book (latest ed.)
Theme: Moving beyond basic pump curves to system-level hydraulic optimization

4. Pumps as Turbines (PATs)

• For micro-hydropower or pressure reducing stations.
• Reverse running performance curves (head vs. flow in turbine mode).

Section D: Net Positive Suction Head (NPSH)

• NPSH Available (NPSHa): Rigorous calculation accounting for atmospheric pressure, vapor pressure, friction on the suction side, and velocity head.
• NPSH Required (NPSHr): Interpretation of manufacturer curves. The Data Book clarifies the 3% head drop rule.
• Cavitation Prevention: Tables for allowable suction specific speed (Nss) limits.

3. Life Cycle Cost (LCC) Analysis

• Standardized formulas for energy cost calculation ($/GPM vs. $/Head).
• Discounting future maintenance costs (pump packing vs. mechanical seals).
• Carbon footprint estimation per million gallons pumped.