Optimization of Combined Protective Measures Against Pump-Trip Water Hammer in a High-Flow-Rate Water-Supply Pumping Station Expansion Project
Year: 2026
Type: book-chapter
Abstract: To assess the applicability of the original water-hammer protection facilities after the expansion of a high-flow water-supply pumping station and to optimize the corresponding protection strategy, a numerical model of pump-trip water hammer was established for the pumping station and its downstream conveyance pipelines in a medium-sized pumping station expansion project. The performance of the existing protection system and additional protective measures was evaluated under two extreme water-supply scenarios. The results show that, after expansion, the transient positive and negative pressures induced by emergency pump trip still fail to satisfy the prescribed control criteria, even with the existing air vessels and two-stage closing tilting-disc non-slam check valves in operation. The existing air vessels remain effective in attenuating both positive and negative pressure peaks, whereas the two-stage closing check valves can effectively suppress pump reverse rotation. However, installing only additional air valves downstream of the pumps and at the pipeline ends provides limited mitigation of extensive negative pressure. By contrast, the combined protection scheme consisting of the retained original facilities, one additional air vessel, and three groups of anti-water-hammer air valves markedly reduces pressure fluctuations in the expanded system, ensuring that the maximum pressure, minimum pressure, and pump reverse rotation all satisfy the control criteria when four pumps operating in parallel trip simultaneously due to power failure. These findings provide a useful reference for the design of combined protection against pump-trip water hammer and for the coordinated optimization of existing and newly added protective facilities in similar pumping station expansion projects.
DOI: 10.3233/atde261148
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7223181758