法国南特大学海洋可再生能源研究博士后职位

法国南特大学海洋可再生能源研究博士后职位

Post-Doc-Effect Of Biofouling And Artificial Reefs On Floating Offshore Wind Turbines

Universities And Institutes Of France

Description

Organisation/Company: Université de Nantes

Research Field: Biological sciences › Biology Engineering

Researcher Profile: First Stage Researcher (R1)

Application Deadline: 27/12/2021 00:00 - Europe/Athens

Location: France › Nantes et Boston

Type Of Contract: Temporary

Job Status: Full-time

Around the world, floating wind turbine projects, at the prototype, pilot farm or commercial farm scale are under development. Two of their key components are the mooring lines and the dynamic power cable for connecting wind turbines to their electrical substation and the sub-marine energy network.

A few weeks and months after their immersion, marine structures are colonized by various marine species. When they are fixed on offshore sites this presents two particularly interesting issues:

- the first is that this presence can make it possible to reconnect with an old biodiversity that has disappeared or to enrich the site with a new biodiversity. However, this approach deserves to be measured because it is also possible that this structure captures invasive species.

- the second issue is that these structures are sensitive to the presence of bio-colonization in that they increase hydrodynamic forces and therefore limit reliability. This implies costly maintenance operations, thereby increasing the cost of operation and therefore, in the case of marine renewable energies, the cost of energy.

The focus of the post-doc in on the latter. Science is faced with the modeling of a complex problem and has made significant progress in recent years in identifying probabilistic growth patterns and identifying realistic geometries from in-situ measurements. These new data call into question past practices. In particular, it is shown that, over transitional periods, they are not always conservative.

This research is part of the international project I2FLOW (Improve the environmental Integration of Floating Offshore Wind Turbines) between the University of Nantes and the University of Massachusetts funded by WEAMEC and FEDER in partnership with the association OcéanRécifAvenir.

Research topic :

The goal of this research is to better integrate the marine growth effect and the effect of artificial reefs at a structural level by:

- including the spatial variability and the time variant growth of biofouling on mooring lines.

- including the real effect of marine growth on dynamic power cables with the changes of materials and orientation of components.

- including other mechanical effects such as the visco-elasticity of mooring lines and thus on their fatigue.

The method will be based on three pillars:

The modeling, including uncertainties;

The numerical simulation for reducing computational time;

Tests in tanks for completing the knowledge.

Offer Requirements Specific Requirements

Following skills are required:

Strong interest for Marine renewable Energies

Skills in hydrodynamics behavior of offshore structures

Skills in numerical simulations

Uncertainty modeling

Following skills are recommended:

Past involvement in tests

Uncertainty propagation and Reliability assessment

Communication and writing in English

Start: between January 3rd and Fevruary 15th

Contact Information

Organisation/Company: Université de Nantes

Organisation Type: Large Company

Country: France