Nant de Drance - Ventilation

Project description

The concerned infrastructure is the Nant de Drance 900 MW pumped storage power station located in Valais – Switzerland.

The project includes:

• A main machine cavern (194m x 52m x 32m LHW) containing 6 Francis reversible groups (150 MW each).
• Secondary caverns (transformers, valves).
• 17 km of underground tunnels / galleries.
• 8 electrical substations. 

Services

• Determination of ventilation objectives as current regulations and different modes (comfort, fire , etc.)
• Developing the operating principle diagrams of ventilation flow
• Predimensioning ventilation equipment and optimization of electrical power
• Quotation and quantitative estimation of equipment
• Detailed definitions of modes / ventilation scenarios
• Sizing fans / piece and ductwork
• Design of ventilation facilities ( power plants, wells , etc.)
• Plans, quantitative , etc.
• Studying the formation of fog gallery
• 3D fire simulation to verify / validate the sizing of the fire ventilation