Alto Tâmega Hydroelectric Complex
Acoustic engineering for one of Europe's largest energy infrastructure projects.
The challenge
The Tâmega hydroelectric complex, located in northern Portugal, is one of the largest energy initiatives in the country's history and one of Europe's biggest energy storage facilities. The system includes three dams with a combined installed capacity of 1,158 MW and two wind farms reaching 274 MW. The construction of Tâmega marked a milestone in the transition towards a cleaner, more efficient energy model.
The technical complexity was significant: large turbines, alternators, hydraulic systems and high-power electromechanical equipment operating in highly sensitive environmental settings. The challenge was to ensure simultaneous compliance with occupational noise exposure regulations and applicable environmental standards, both inside the facilities and in their surroundings.
The solution
SNA Acoustic Consultancy developed the integral acoustic project aimed at defining and recommending specific solutions for different zones and emission sources across the three power stations: Gouvães, Daivões and Alto Tâmega.
The acoustic project focused on optimising and reducing sound levels both inside and outside the facilities. Solutions were designed for each enclosure and piece of equipment, incorporating absorbent treatments, insulation systems, technical enclosures and structural transmission control measures.
Beyond airborne noise reduction, structural transmission was specifically addressed — a critical aspect in high-power installations — minimising vibratory propagation towards building elements and the exterior environment.
The result
SNA's involvement in the Tâmega complex demonstrates the firm's capability to participate in strategic energy infrastructure at an international scale, integrating advanced acoustic engineering, sustainability and regulatory compliance. In a project where the technical and environmental dimension is at its highest, SNA provided tailored solutions that reconcile energy efficiency, occupational safety and environmental respect.
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