Publications by Cécile Münch-Alligné

Online Loss Calculation and Optimization of a M3C Driven Externally Excited SM

Cécile Münch-Alligné, Philippe Alexandre Bontemps, Drazen Dujic, Daniel Biner

2023

CFD simulations of hydraulic short-circuits in junctions, application to the Grand’Maison power plant

In the framework of the XFLEX HYDRO H2020 European Project, the pumped-storage power plant of Grand'Maison (France), owned by Electricité De France, focuses on the implementation of the hydraulic short-circuit (HSC) operating mode. This mode increases the ...

2022

CFD simulations of a Y-junction for the implementation of hydraulic short-circuit operating mode

François Avellan, Cécile Münch-Alligné, Daniel Biner

In the framework of the XFLEX HYDRO H2020 European Project, one of the demonstrators focuses on the implementation of the hydraulic short-circuit on the pump storage power plant of Grand-Maison owned by Electricite De France (EDF). The Grand-Maison power p ...

IOP PUBLISHING LTD2021

DuoTurbo: Implementation of a Counter-Rotating Hydroturbine for Energy Recovery in Drinking Water Networks

François Avellan, Samuel Chevailler, Cécile Münch-Alligné, Vlad Hasmatuchi, Daniel Biner

To enhance the sustainability of water supply systems, the development of new technologies for micro scale hydropower remains an active field of research. The present paper deals with the implementation of a new micro-hydroelectric system for drinking wate ...

2021

Numerical simulations of Pelton turbine flow to predict large head variation influence

François Avellan, Steve Crettenand, Cécile Münch-Alligné, Siamak Alimirzazadeh

In the framework of the new feed-in-tariff system in Switzerland for Small Hydropower Plants (SHP), the aim of the SmallFLEX project, led by HES-SO Valais and performed in collaboration with EPFL, WSL, EAWAG, PVE, and FMV, is to show how SHP can provide wi ...

IOP PUBLISHING LTD2021

Investigation of the Time Resolution Set Up Used to Compute the Full Load Vortex Rope in a Francis Turbine

François Avellan, Andres Müller, Cécile Münch-Alligné, Arthur Tristan Favrel

The flow in a Francis turbine at full load is characterised by the development of an axial vortex rope in the draft tube. The vortex rope often promotes cavitation if the turbine is operated at a sufficiently low Thoma number. Furthermore, the vortex rope ...

2021

Experimental and numerical investigations of a high-head pumped-storage power plant at speed no-load

François Avellan, Pedro Filipe De Almeida Manso, Cécile Münch-Alligné, Vlad Hasmatuchi

Due to the increasing integration of new renewable energies, the electrical grid undergoes more frequent instabilities. Hydroelectric power plants, particularly pumped storage plants, are well suited for grid control. However, this objective requires exten ...

IOP PUBLISHING LTD2019

Hydraulic performance evaluation of a micro-turbine with counter rotating runners by experimental investigation and numerical simulation

François Avellan, Cécile Münch-Alligné, Elena Vagnoni, Loïc Andolfatto

The development of energy recovery systems on existing water utility networks is a new challenge for increasing the sustainability of electricity generation mix. The concept of the new micro-turbine with counter rotating runners braces this goal by allowin ...

Pergamon-Elsevier Science Ltd2018

U-RANS Simulations and PIV Measurements of a Self-excited Cavitation Vortex Rope in a Francis Turbine

François Avellan, Cécile Münch-Alligné, Arthur Tristan Favrel

SPRINGER-VERLAG SINGAPORE PTE LTD2018

Comprehensive power loss modelling to improve the performance of an Energy Recovery Station for water utility networks

François Avellan, Cécile Münch-Alligné, Loïc Andolfatto, Daniel Biner

The work presented in this paper details the methodology applied to inventory and estimate the power losses in a micro-turbine with counter-rotating runners. The separation between the impact of design parameters and operational parameters on each identifi ...

Pennwell2017

Energy production with a tubular propeller turbine

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Cécile Münch-Alligné, Vlad Hasmatuchi, Irene Almeida Samora

Micro-hydropower is a way of improving the energetic efficiency of existent water systems. In the particular case of drinking water systems, several studies have showed that pressure reducing valves can be by-passed with turbines in order to recover the di ...

2016

Simulation of energy recovery on water utility networks by a micro-turbine with counter-rotating runners

François Avellan, Cécile Münch-Alligné, Vlad Hasmatuchi, Elena Vagnoni, Loïc Andolfatto

Wherever relief valves and other energy dissipation devices are installed to limit the pressure, water utility networks provide unexploited hydropower potentials. This is mainly due to a lack of economically viable technologies for energy recovery in the p ...

International Association For Hydraulic Research2016

Experimental characterization of a five blade tubular propeller turbine for pipe inline installation

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Cécile Münch-Alligné, Vlad Hasmatuchi, Irene Almeida Samora

The interest in micro-hydropower in existing infrastructure is increasing since this is a technology with low environmental impacts and potential for energy recovery in different types of installation. The technologies available for these schemes are still ...

Elsevier2016

Head loss coefficient through sharp-edged orifices

Giovanni De Cesare, Anton Schleiss, Cécile Münch-Alligné, Nicolas Jean François Pascal Ghislain Adam

Nowadays, high-head power plants could increase their installed power capacity for many reasons, e.g. dam heightening, increase of their peak power capacity or refurbishment with new turbines. Frequently, due to several considerations, e.g. topographical o ...

2016

Experimental evaluation of the velocity profiles and performance of a counter rotating micro-turbine by 2D laser Doppler velocimetry

François Avellan, Cécile Münch-Alligné, Elena Vagnoni, Loïc Andolfatto

The most exploited renewable energy at a global scale is hydropower, which nowadays accounts for the 18 % of the world’s electricity supply. Its production is expected to increase approximately 3.1% each year in the next 25 years maintaining its share in t ...

2015

A mixed standard/custom design strategy to minimize cost and maximize efficiency for picohydro power potential harvesting

François Avellan, Cécile Münch-Alligné, Elena Vagnoni, Loïc Andolfatto

Harvesting the numerous small scale hydroelectric potential is a way to increase the sustainable hydraulic energy production in developed countries. The condition to meet economical profitability with pico power stations - below 25 kW - is to minimize the ...

2015

Application of Laser Doppler Velocimetry to the development of a counter rotating micro-turbine

François Avellan, Cécile Münch-Alligné, Elena Vagnoni, Loïc Andolfatto, João Nuno Gomes Borga Delgado

The sustainability of the electricity mix can be increased by introducing recovery energy systems on existing water supply infrastructures. The concept of the new counter rotating micro-turbine presented in this work is a competitive option for energy reco ...

2015

Analytical hill chart towards the maximisation of energy recovery on water utility networks with counter rotating micro-turbine

François Avellan, Cécile Münch-Alligné, Elena Vagnoni, Loïc Andolfatto, João Nuno Gomes Borga Delgado

Existing water utility networks provides a wide, distributed and unexploited hydropower potential. The installation of energy recovery stations on existing infrastructures limits both the required investment and the environmental impact. The counter-rotati ...

2015

Mind the gap: a new insight into the tip leakage vortex using stereo-PIV

Mohamed Farhat, Matthieu Dreyer, Cécile Münch-Alligné

The tip leakage vortex (TLV), which develops in the clearance between the rotor and the stator of axial hydro turbines, has been studied for decades. Yet, many associated phenomena are still not understood. For instance, it remains unclear how the clearanc ...

Springer2014

Psamathe – Alternatives Konzept der Entsanderspülung

Giovanni De Cesare, Cécile Münch-Alligné, Milad Daneshvari, Sebastian Schwindt

Die vollständige Spülung von Dufour-Sandfängen geht einher mit erheblichen Verlusten des Triebwassers, wodurch der Anlagenertrag geschmälert wird. Die Effizienz eines neuartigen Spülsystems wird durch numerische Simulationen anhand einer Fallstudie eines D ...

Springer Vieweg-Springer Fachmedien Wiesbaden Gmbh2014