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NewsTechno n°7 - Sea & Digital Technologies
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Businesses associated with marine technologies are undergoing constant development creating technological solutions for transport, maritime safety, and also marine energy and mining resources. New waves of innovation are being developed in the Brittany and Pays de la Loire region, areas which are recognised in offshore expertise. Ouest Valorisation – SATT is strengthening this economic dynamic by forming strong partnerships with its ecosystem and by offering industrialists an attractive portfolio of technologies from public research laboratories:

Today, software tools have become vital for simulating demanding behaviour in marine environments.

As a relay point for digital modelling, and in advance of the launch of marine technologies, land-based testing resources are still a key step in qualifying future offshore products. Universities and engineering colleges in western France have platforms, with certain equipment which is unique in Europe. They also make these platforms available to industrial companies.

To measure the impacts of maritime structures and their forecast performances at all times, the research teams in western France have developed measurement sensors to monitor data on marine sites and the associated tools.

Cédric Letort
Business manager – Marine Technologies
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// DIGITAL MODELLING TOOLS //
Software tools have become vital for simulating the behaviour of increasingly complex structures in extreme marine environments. They enable study costs to be reduced while optimising product performances and so reduce industrial and economic risks.
In this area, the laboratories in Brittany and the Pays de la Loire have the best skills and technologies in fluid mechanics and hydrodynamics in the naval environment. To marine surface condition simulators get swell, wind and current data to interact to improve the behaviour of structures at sea: hydrodynamic performance, manoeuvrability, reliability and robustness. These simulators are used before tank and land testing and also to run the tests.
High-tech electromechanical expertise uses the most powerful algorithms to test the outputs and acoustic signatures from turbines, optimising product performances in terms of propulsion, as well as in the highly competitive Marine Renewable Energy (MRE) markets.

 
Test tank - Ecole Centrale de Nantes
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// WIRELESS CORROSION SENSOR //
Corrosion control in marine environments requires potential and electrical currents to be measured. While sensors based on these principles exist, their deployment and their use in networks to monitor large structures are made harder because of their size and weight.
The technology which is being developed is a small, passive-energy wireless sensor which is used in particular to measure corrosion potential during steel passivation in sea water or when detecting paintwork deterioration.


 
// CONCRETE CORROSION SENSOR //
The durability of reinforced concrete structures is affected by the penetration of chloride ions which corrode frameworks, leading to a loss of adhesion between the steel and the concrete, reducing the structure's support capacity and generating significant maintenance costs.
The sensor which is being developed is integrated into the material, so delivering an accurate measurement of the chloride ion content, independent of the exterior environmental conditions (temperature, humidity, solar radiation, etc.). The sensor's durability is in line with the structure's own durability (50 to 100 years).


 
// NEW SENSOR TO MONITOR STRUCTURAL CONSTRAINTS  //
This new sensor solution for structural monitoring is based on an original concept which enables the deformation tensioner to be obtained in 6 directions (see current 1D or 2D sensors).
The sensor is integrated into cold (concrete) and moderate temperature (composites) moulded materials and delivers a measurement according to the time and the position of the sensor, but without being modulated by its presence.

 
The research establishments in Brittany and the Pays de la Loire have a wide range of technological platforms. They provide industrial companies with access to vital skills and equipment to model and test their innovations.
SEMREV: Experimental site at sea for MRE systems
Development of wave and wind energy recovery systems under operational conditions
Establishment: École Centrale de Nantes

 
Towing tanks and wave tank
Evaluation of the behaviour of structures at sea by reproducing realistic conditions (wind tunnel towing, head-on and multi-directional swell).
Establishment: École Centrale de Nantes

 
SHIVA: test platform for marine turbines and propellers
Test of different kinematics for transverse axis propellers and wind turbines
Establishment: École Navale

 

Image and Multi-Source Land and Sea Imaging Cluster
Establishments: Université de Bretagne Occidentale / IUEM
Sea Test Base: Innovation platform for testing at sea
Deployment in operational conditions for instruments, equipment and sensors
Establishments: Celadon
The technologies presented in this NewsTechno are produced by the following laboratories :
GeM: Mechanical Engineering Institute

The "Structural Calculation" team is looking into the reliability of structures which integrate in their uncertainty modules uncertainties that may relate to material properties, loads or geometry, the fundamental approach for obtaining "reliable" numerical precision which may be used in a design or decision-making process.

Establishments: Université de Nantes, Ecole Centrale de Nantes, CNRS

 
LHEEA : Hydrodynamics, Energy and Atmospheric Environment Laboratory

The Marine Energy and Oceans team is working on waves and the different sea conditions and the specific hydrodynamic features of wave energy converters.

Establishments: Ecole Centrale de Nantes, CNRS

 
LMB : Brittany Magnetism Laboratory

The SURFIN team (Physics and chemistry for surfaces and interfaces) is looking into environmental materials and sensors (corrosion sensors, magnetics, biomaterials), magnetic nanostructures and micromagnetism.

Establishments: Université de Bretagne Occidentale, CNRS

 
Lab-STICC: Information, Communication and Knowledge Science and Technology Laboratory 

The objective of the PIM team (Multi-scale propagation and Interaction) is to develop and improve modelling and optimisation tools to help represent and understand the phenomena produced by the interaction of the waves with the environment.

Establishments: Université de Bretagne Occidentale, Université de Bretagne Sud, CNRS, ENSTA Bretagne, ENIB, Mines Telecom.

IREENA: Nantes Atlantique Electrical Energy Research Institute

The MEE team (Electrical Energy Control) is working on modelling electrical engineering mechanisms for their dimensioning or implementation. This research is mainly applied in the areas of renewable energies and transport.

Establishments: Université de Nantes, Polytech Nantes

IRENav : The French Naval Academy Research Institute

The M2EN group (Mechanics and Energy in Naval Environment) works on mechanics and hydrodynamics oriented to the study of cavitation phenoma, propellers, and renewable energies in the maritim domain. 

Academy : French Naval Academy

 
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