Hydraulic Services


Water Intakes, Pumping Stations and Outlet Optimisation

Ensure a proper evaluation of your power and industrial plant’s intake system, pumps and outfall design before construction for improved performance

What you can achieve

Power and industrial plants often draw water from neighbouring rivers and oceans to maintain water supply. Specialised extraction systems complete with an intake velocity cap, intake pipeline and pumping station, help move filtered water to the plant – while outlet structures and diffusers discharge water to the environment.

These systems must meet international standards while operating efficiently and sustainably. That’s where we come in. From engineering desk studies to state-of-the-art numerical and physical modelling, DHI’s world-leading hydraulic services team can help you achieve:

Design conformance

Our specialists will ensure all designs conform to international guidelines (ANSI/HI 9.8) and best practices

Cost savings

To mitigate pressure loss, we conduct flow evaluations inside the velocity cap, identify 'dead zones' in the pumping station and assess sedimentation & outlet diffuser dilution capacity

Less wear and tear

Through an optimised approach to water flow and pump inlets, you'll experience less vortex formations and wear and tear on the system.

Improved management

By avoiding critical water surface surges due to sudden changes in the pumping rates, you can manage start-up and emergency scenarios with more confidence

Minimal plume recirculation

Modifications to the layout of outfall and intake systems can help to significantly reduce plume recirculation

A one-stop shop for all your inlet/outfall hydraulic service needs

Hydraulic services at a glance

Engineering desk studies

To ensure alignment with international best practices, our specialists calculate head loss and evaluate your designs against the ANSI/HI 9.8 guidelines.

Adapted from ANSI/HI 9.8 Guidelines

Transient analysis

These studies are designed to provide a greater understanding of the transient effects of the water surface in a pumping station during a pump start up and pump trip.

3D flow simulations

To identify problematic areas, test remedial measures and optimise the design, we use Computational Fluid Dynamics (CFD) to simulate the 3D fluid flow in and around intake and outfall structures.

Physical modelling experiments

For final verification of the structures, we conduct physical model experiments in accordance with ANSI/HI 9.8 guidelines. These experiments are especially useful for observing complex phenomena such as vortex generation and pre-swirl at pump bell mouths and the mixing of air in outfall structures.

Explore additional intake and outfall solutions

  • Hydrodynamic force calculations to support structural design
  • Scour assessment around the bottom of fixed structures, such as velocity caps
  • Systems optimisation by evaluating remedial measures such as baffles and floor splitters
  • Assessment of air entrainment into the intake system caused by offshore waves
  • Sediment reduction as a result of intake system optimisation

Want to know more?

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