Pedro Filipe De Almeida Manso

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For fatigue life estimation as well as for fatigue testing analysis of welded structures by local stresses approaches, the stress concentration factor (SCF) at the weld must be known. Full penetration butt welded joints are extensively used in steel struct ...

Hydropower plays a pivotal role in the socio-economic development of Bhutan where water resource is abundantly available and therefore several hydropower plants are being planned and a few under construction. However, with the presence of several potential ...

A rehabilitation scheme at the more than 100 year-old Fully hydro scheme, where the penstock had shown signs of ageing, has involved converting the original single power station into a cascade of three plants, which have been integrated in a municipal water supply system. This paper presents the main stages of the rehabilitation studies, the reasons for the solution adopted, as well as an overview of the construction challenges. The scheme is now nearing completion, with the last small plant scheduled to be

Hydropeaking is the water flow or level variations in rivers caused by hydropower exploitation. This phenomenon have negatives impacts on fauna and flora. Mitigation measures can lead to producing less and reduce production at the times that are most economically attractive. In a context where renewable energy production wishes to be increased and where operators wish to maintain their revenues, these measures are not satisfactory. This work aims to propose mitigation solution which keep production and flex

The authors present the current context for energy transition and hydropower development in Switzerland, summarizing the activities in the field of hydropower infrastructure research carried out over the past three years and presenting the development objectives for the coming four years. The focus is on increasing operational flexibility and winter production. The plan includes three large scale pilot projects, the first on recently commissioned small hydro schemes, the second on sediment release through t

Transient pressure waves in real pipe systems are affected by several phenomena not accounted for in the classic waterhammer theory. Damping mechanisms are differently manifested according to the material, configuration and existing features of pipe system ...

Reservoir sedimentation is known to be a key issue worldwide. One operational measure to deal with sediment accumulations is flushing; however, efficiency is often lacking. The goal of this study is thus to improve the effectiveness and efficiency of flush ...

When for steel liners of pressure tunnels and shafts high-strength steels are used, welded joints are subject to the risk of hydrogen induced cold-cracking in the base material. Longitudinal butt welded joints are critical regions as they are loaded transv ...

Electricity generation, water supply, flood protection, flow regulation and navigation are amongst the main services provided by reservoirs. Sedimentation affects the sustainability of reservoirs, by reducing their storage capacity, and increases the negat ...

Hydropower operations can cause hydropeaking particularly in the case of pumped storage systems located in mountainous regions. Due to the rapidly varying discharge conditions, hydropeaking leads to several problems such as stranding of fishes and inverteb ...

Suite à décision du Conseil Fédéral de sortir du nucléaire, l’hydroélectricité suisse jouera un rôle central pour réussir la transition énergétique. Cependant, le changement climatique semble avoir un impact négatif sur la production hydraulique à long ter ...

Située à la confluence de deux cours d'eau – la Limmat et la Sihl – la ville de Zurich a toujours dû faire face aux crues. Suite aux crues de 2005, un projet de dérivation de la Sihl vers le lac de Zurich en amont de la ville a été lancé. En alternative à ...

Une évaluation du potentiel de turbinage sur les systèmes d’eaux usées en Suisse a été réalisée au Laboratoire de Constructions Hydrauliques (LCH) en collaboration avec le bureau e-dric.ch. Le potentiel hydroélectrique de chaque STEP a été calculé et complété par une analyse de rentabilité pour chacun des sites identifiés, ce qui a permis d’identifier 19 sites potentiellement rentables. L’étude de différents scénarios d’évolution de l’assainissement fait apparaitre 31 nouveaux sites rentables dans le futur.

An accurate estimation of the stress in a steel liner is required for the design of steel-lined pressure shafts, both with regard to safety assessment of ageing steel-lined waterways of hydropower plants built in the 20th century, and for new projects whic ...

L’utilisation des aciers à haute-résistance permet de concevoir des blindages plus fins pour les puits et galeries blindés en charge des aménagements hydroélectriques. Cependant, ces aciers, bien que présentant une meilleure résistance élastique sous tension, ne sont en général pas plus résistants à la fatigue que les nuances d’acier plus basses lorsqu’ils sont soudés. Dans le contexte changeant du marché électrique européen, les conditions opératoires deviennent de plus en plus extrêmes pour les aménagemen

L'aménagement hydroélectrique de Ritom se situe dans le canton du Tessin. Actuellement, l'aménagement turbine les eaux du lac de Ritom (CFF) et du bassin d'Airolo (AET) essentiellement pour l'approvisionnement électrique du réseau CFF et AET. Dans le cadre du renouvellement de l'aménagement hydroélectrique de Ritom, la construction d'un bassin de démodulation d'un volume de 100'000 m3 est prévue à l'aval des centrales de Ritom (CFF) et de Stalvedro (AET) avec pour objectif l'atténuation des éclusées. Le pro

Pedro Filipe De Almeida Manso

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New parametric equations to estimate notch stress concentration factors at butt welded joints modeling the weld profile with splines

Development of a Semi-distributed Hydrological Model for Glaciated Punatshangchu Basin in Bhutan

Fully rehabilitation: integrating a small hydro cascade into a water supply system

Alpine hydropower plants renewal : synergies between flexible production and hydropeaking mitigation

Electricity supply and hydropower development in Switzerland

Hydraulic transients in straight and coil pipe rigs

Effects of flow guide walls on sediment flushing in peaking hydropower reservoirs

Stress intensity factors for axial semi-elliptical surface cracks and embedded elliptical cracks at longitudinal butt welded joints of steel-lined pressure tunnels and shafts considering weld shape

Innovative methods to release fine sediments from reservoirs developed at EPFL, Switzerland

Effects of flow guide walls on sediment flushing in peaking hydropower reservoirs

Hydropeaking mitigation measures in the Swiss Upper-Rhône basin

Impacts du changement climatique sur la production hydroélectrique alpine : comment une nouvelle retenue à Oberaletsch pourrait garantir la gestion durable des installations existantes

Synergies entre la production hydroélectrique et la protection contre les crues : cas d'étude de la Sihl en Suisse

Turbinage des eaux usées, quel potential pour la Suisse?

Advanced models for stress evaluation and safety assessment in steel-lined pressure tunnels

Contraintes aux soudures longitudinales des blindages sous l'effet de l'anisotropie du rocher et des imperfections géométriques

Atténuation dans l'espace cours d'eau des éclusées résiduelles d'un bassin de démodulation: cas d'étude de Piotta

Solving of a lifting problem in a pumped storage power plant

Hydro-structural investigation of a 100 MW Francis turbine based on experimental tests and numerical simulations

Assessing the acceptability of concrete dam submergence considering scour