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WEIB event - meet the wave and tidal energy sector on an innovation and networking day.

28 April 2015 at Aalborg University

If you wish to expand your network and learn more about the latest knowledge in wave and tidal energy, sign up for WEIB, which offers a conference, b2b speed networking and exhibition.

Building on last year’s success, we invite all players and stakeholders involved in wave and tidal energy research and development to the Wave Energy International Business2Business Event, WEIB.

The WEIB programme has two primary activities:

  1. Sector update: Information about the most recent test results as well as current and upcoming wave energy projects
  2. Networking: A b2b speed networking event for all participants

Register and see invitation here 


PhD defence, Oct 29: Andrew Zurkinden

Wednesday 29. October 2014 at 9:00 - 12:00

Andrew Zurkinden will present and defend his PhD thesis ""Analysis of a Wave Energy Converter with Particular Focus on the Effects of Power Take-Off Forces on the Structural Responses".

Wave energy is regarded as a major and promising renewable energy resource. The most critical factor to the success of deploying a wave energy converter in an ocean environment is the cost. The key factors affecting the costs include the performance, capital costs, operation and maintenance costs and risk. Changes to the design can affect both the performance and the costs simultaneously.

The objective of this thesis is to develop design tools and methods for the design process of wave energy converters in order to make them more competitive. Wave to wire models are numerical models used to evaluate the electrical power generated by a given wave energy device from a given wave condition. The first part of this work focuses on the development of such a numerical model. An important task is to quantify the wave-induced load effects to ensure that the input is correct and a safe and robust design of the converter can be carried out. One can achieve this task by running experiments, using simplified models from the classification societies or carrying out numerical calculations.
In this thesis, the dynamical properties of a semi-submerged hemisphere oscillating around a pivot point where the vertical height of this point is above the mean water level are investigated. The numericalmodel includes the calculation of the nonlinear hydrostatic restoring moment by a cubic polynomial function fit to laboratory test results. Moreover, moments due to viscous drag are evaluated on the oscillating hemisphere considering the horizontal and vertical drag force components. The influence on the motions of this nonlinear effect is investigated by a simplified formulation proportional to the quadratic velocity. Results from experiments are shown in order to validate the numerical calculations. All the experimental results are in good agreement with the linear potential theory as long as the waves are sufficiently mild. For steep waves however, the relative velocities between the body and the waves increase thus requiring inclusion of the nonlinear hydrostatic restoring moment to effectively predict the dynamics of the wave energy converter. For operation of the device with a passively damping power take-off the moment due to viscous drag is found to be negligible.
In the second part of the thesis the focus lies on the structural modeling of a wave energy converter. The challenge here is to incorporate different control strategies in the analysis and investigate their effect on the mechanical stresses. A fatigue model is set up which can be used as an independent and generic toolbox to calculate the fatigue damage at an early stage of the project. The stress responses due to the stochastic wave loads are computed by a Finite Element model in ANSYS using the frequency-domain approach. The fatigue damage is calculated based on the spectral-based fatigue analysis in which the fatigue is described by the given spectral moments of the stress history. The question will be answered, which control case is more favorable regarding the trade off between fatigue damage reduction and increased power production.

Assessment committee:
- Assoc. Prof. Thomas Ruby Bentzen, Department of Civil Engineering, AAU (chairman)
- Professor Peter Troch, Department of Civil Engineering, Ghent University
- Professor Göran Sandberg, Lund University

- Professor Lars Damkilde, Department of Civil Engineering, AAU

NOTE: Thesis will be available in print at Dept. of Civil Engineering and at The Doctoral School of Engineering and Science at Aalborg University. The thesis will be available online after the defence at VBN.

Host: Dept. of Civil Engineering
Address: Fibigerstræde 10, auditorium, 9220 Aalborg 

PhD defence, Sep 19: Francesco Ferri

Friday 19. September 2014 at 13:00 - 16:00

Francesco Ferri will present and defend his PhD thesis "Wave-to-wire Modelling of Wave Energy Converters". All are welcome. A reception will be held afterwards.

The wild development of the world from the 1769, years in which James Watt patented his steam engine, brought utterly to the actual, real or assumed, economical, political, environmental and energetic crisis. The answer to the question “how to solve these problems?" is a tangled unsolved discussion, but talking about renewable energy partially ravels the problem out. Wave energy is a large, mostly untapped, renewable energy resource. It has the potential to contribute significantly to the future energy mix, but the sector has not yet rolled off into the market in consequence of a number of technical and non-technical issues. These can be efficiently summarised in the cost of the energy produced by the various wave energy converters: If compared with other renewable energy technologies the cost of energy from the ocean waves is still significantly higher. Holding the comparison it also important to noticed that there is not a clear front runner in the wave energy sector, which fades effort and funding over a too broad frame.

In order to assist efficient development and analysis of wave energy converters and therefore to accelerate the sector progression towards commercialisation, a generally applicable, efficient and reliable wave-to-wire model tool is needed. A wave-to-wire model identifies the relation from the source of energy of a particular location to the expected device productivity. The latter being expressed in terms of electricity fed into the grid. The model needs to output a coarse picture of the actual status of the different devices and their power productivity, which is used afterwards to sieve promising concepts out.

Assessment committee:
Associate Professor Thomas Lykke Andersen (chairman), Department of Civil Engineering, Aalborg University
Research Scientist, Jørgen Hals Todalshaug, NTNU/Marintek, Norge
Professor, Piero Ruol, University of Padova, Italy

Ph.d. supervisor:
Assosiate Professor Jens Peter Kofoed, Department of Civil Engineering, Aalborg University

Host: Dept. of Civil Engineering
Address: Sofiendalsvej 9, room 9.201, 9200 Aalborg SV 

3rd Symposium: Wave-to-Wire modeling

Tuesday 3. June 2014 at 9:00 - 17:00

The objective of this third and last symposium for Structural Design of Wave Energy Devices (SDWED) is to present and disseminate the research carried out under the SDWED project within the strategic research alliance. The symposium will present design tools, W2W models, principles of structural design and reliability concerning wave energy devices. The symposium will provide examples of how these tools can be applied to different types of wave energy devices developed in Denmark.

The PhD students that have been educated as part of the SDWED project – Francesco Ferri, Simon Ambühl, Andrew Zurkinden and Torben Christiansen – will give presentations related to their PhD work.

During the SDWED project period 2010 – 2014, DanWEC as well as the Danish Partnership for Wave Power has been formed. The interaction between the Partnership, DanWEC and the strategic research alliance has been close, i.e. in undertaking work related to development and use of tools for optimization of the Danish Wave Energy Converters as well as testing and standardization.



Introduction / Jens Peter Kofoed, AAU-C

WP 1 Hydrodynamics

WP 2 Moorings

WP 3 Power take off

WP4 Wave to wire models

WP 5 Reliability

Host:Aalborg University

All partners meeting

Monday 2. June 2014 at 9:00 - 15:00

Host: Aalborg University
Address: Aalborg

PhD course 2013

Monday 19. August 2013 at 8:30 - Friday 30. August 2013 at 16:00

In August 2013, the Wave Energy Research Group at Aalborg University, Department of Civil Engineering, will offer a PhD course in Modeling and Control of Wave Energy Converters.

To learn more about the "Modeling and Control of Wave Energy Converters" PhD course which runs from August 19-30, 2013, please visit the Wave Energy Research Group website.


PhD course 2013

Monday 19. August 2013 at 8:30 - Friday 30. August 2013 at 16:00

In August 2013, the Wave Energy Research Group at Aalborg University, Department of Civil Engineering, will offer a PhD course in Modeling and Control of Wave Energy Converters.

To learn more about the "Modeling and Control of Wave Energy Converters" PhD course which runs from August 19-30, 2013, please visit the Wave Energy Research Group website

PhD defence, May 24: Stefano Parmeggiani

Friday 24. May 2013 at 13:00 - 16:00

Stefano Parmeggiani will present and defend his PhD thesis "Modelling and Testing of Wave Dragon Wave Energy Converter Towards Full Scale Deployment : analysis of overtopping performance and mooring load response." on May 24, 2013 at 13:00. All are welcome. A reception will be held afterwards.

Host: Dept. of Civil Engineering
Address: Sohngaardsholmsvej 57, Auditorium F-108, 9000 Aalborg

PhD defence, Mar 15: Julia Chozas

Friday 15. March 2013 at 13:00 - 16:00

Julia Chozas will present and defend her PhD thesis "Technical and non-technical issues towards the commercialisation of wave energy converters" on Friday, 15 March 2013, 13:00 at Sohngaardsholmsvej 57, F-108, Aalborg University. All are welcome. A reception will be held afterwards.

The thesis elaborates on the necessary steps and on the different difficulties that appear during the development of a wave energy converter. It focuses on seven key areas which appear when a wave energy converter is going through the initial sea trials. All these subjects are of relevance to successfully reach the commercialisation of wave energy converters and need attention from the sector as such, not least from device developers.

These seven areas are:
i. Regulatory frameworks for wave energy developments.
ii. The role of stakeholder´s and of the public’s opinion on project’s implementation.
iii. Evaluation of the power performance of WECs in sea trials, according to a recently-developed methodology.
iv. Opportunities to grid-connect offshore wave energy projects and the synergies in this area with offshore wind energy projects.
v. Benefits of including wave energy in diversified renewable energy systems, chiefly with respect to power output variability and availability.
vi. Predictability of waves, and assessment of the value of wave forecasting in electricity markets.
vii. Economic assessment of wave energy projects.

The scope of the thesis is broad and embraces subjects that can be categorised within technical and non-technical disciplines. This combination of findings leads to an overview of the wave energy field and of wave energy converter developments.

The thesis underlines hindrances that can affect developments when wave energy converters are commissioned and the benefits wave energy brings to energy systems, especially when wave and wind generation is combined.

Assessment Committee
Gregorio Iglesias, Professor, Plymouth University (United Kingdom).
Jochem Weber, Principal Investigator, Carrigane (Ireland).
Michael Rasmussen, Associate Professor, Aalborg University (Denmark).
HostDepartment of Civil Engineering, AAUAddressSohngaardsholmsvej 57, 9000 Aalborg 


PhD defence, Sep 28: Arthur Pecher

Friday 28. September 2012 at 13:00 - 16:00

Arthur will present and defend his PhD thesis "Performance evaluation of Wave Energy Converters" on Friday, 28 September 2012, 13:00 at Sohngaardsholmsvej 57, F-108, Aalborg University.

Ocean waves provide a sustainable, power-dense, predictable and widely available source of energy that could provide about 10 % of worlds energy needs. While research into wave energy has been undertaken for decades, a significant increase in related activities has been seen in the recent years, with more than 150 concepts currently being developed worldwide. Wave energy conversion concepts can be of many kinds, as the energy in the waves can be absorbed in many different ways. However, each concept is expected to require a thorough development process, involving different phases and prototypes.

Guidelines for the development of wave energy converters recommend the use of different prototypes, having different sizes, which have to perform tank tests or sea trials. This implicates the need of different testing environment, which shifts from being controllable to uncontrollable with the development stages, and results thereby in a need for specific test objectives and procedures for each development stage.

This PhD thesis has looked into the different development stages and more specifically in the performance assessment of wave energy converters based on tank testing and sea trials. The objective was to enhance or complement existing standards and guidelines by making them more transparent, equitable and robust, in order to make power production estimation of full-scale commercial devices more accurate, more comparable between the different development stages and more coherent in between different concepts.

Assessment Committee:
Thomas Ruby Bentzen, Associate Professor, Aalborg University (chair)
Pedro Lomonaco Tonda, Director of CCOB, University of Cantabria
Luca Martinelli, Researcher, University of Padova

Host:Dept. of Civil Engineering
Address: Sohngaardsholmsvej 57, 9000 Aalborg 

PhD courses 2012

Monday 24. September 2012 at 8:00 - Wednesday 5. December 2012 at 16:00

The Wave Energy Research Group at Aalborg University, Department of Civil Engineering have listed their PhD courses for 2012.

The PhD courses run from September to December 2012. Read more on the Wave Energy Research Group website (will be updated continuously with more informaition on programme, registration, etc).

Master Thesis defence, 11 Sep 2012 by Stephane Rapuc

Tuesday 11. September 2012 at 14:00 - 17:00

A Master Thesis by Stephane Rapuc ‘Numerical study of the WEPTOS Single Rotor’ will be presented on 11 September 2012, 14:00 at DTU, Building 403, Room 017.

The work has been carried out in relation to the SDWED project, and Stephane has been working during spring and summer 2012 at AAU-C in the wave lab. as well as on numerical modeling under supervision by Harry B. Bingham and Jens Peter Kofoed. All are welcome at the presentation. The thesis is available for download here.

Host: DTU
Address: DTU, 2800 Kgs. Lyngby, Building 403, Room 017 

Seminar on the Application of the Probability Density Evolution Method (PDEM) to structural reliability analysis of complicated structural systems

Friday 7. September 2012 at 12:30 - 13:30

As a part of his visit partly funded by SDWED, research professor Jianbing Chen, Tongji University, will hold a seminar on the topic "The Application of the Probability Density Evolution Method (PDEM) to structural reliability analysis of complicated structural systems".

Structural reliability has become increasingly important with the increase of the size and complexity of engineering structural systems. Modern reliability theory has been studied for decades but still it is very hard to be applied for practical complicated structures. One of the major problems is due to the limitation of nonlinear stochastic dynamics.

In the past decade, the probability density evolution method (PDEM) has been proposed and developed. This method is based on the ideas of physical stochastic system and the principle of preservation of probability, thereby the high‐dimensional partial differential equations, e.g. FPK equations, could be replaced by a completely decoupled one‐ or two‐dimensional equation, called the generalized density evolution equation (GDEE), which admits analytical or numerical solutions.

The proposed method is then applied to dynamic response analysis and reliability evaluation of large structural systems subjected to random earthquake, wind or wave excitations, by further imposing absorbing boundary condition or introducing the equivalent extreme values. Some examples are illustrated. Problems to be further studied are discussed.

Related topics:
- Reliability analysis.
- Wind turbines and wave energy devices.
- Modelling of stochastic excitations
- Probabilistic design of structures.
- Stochastic structural analysis.
- Random vibration analysis.
- Stochastic Control of dynamic systems.

Host:Dept. of Civil Engineering
Address: AAU, B-125, Sohngaardsholmsvej 57, DK-9000 Aalborg 

2nd SDWED Symposium: Advances in Modeling of Wave Energy Devices

Thursday 26. April 2012 at 9:00 - 17:00

Anyone interested in the wave energy industry is invited to participate in this symposium, which will provide an overview of the achievements within the project so far.

The main focus will be on the first three work packages of the project. The partners in the project will present key results and challenges ahead in the effort to create a common wave-to-wire model.

The symposium will provide an overview of the available numerical tools, and how they can be applied to different wave energy converters. After presentations, time has been allocated for questions and open discussions.

> SUPPORTING NOTES: Book of extended abstracts

Intro, Jens Peter Kofoed
IAB, WP2, Lars Bergdal
IAB, WP4, Jose Luis Villarte

1.1 - Hydrodynamics, overview
1.2 - Wave-structure interaction using overset grids
1.4 - A non-linear numerical test bed for floating WEDs, most recent progress

2.1 - Physical and numerical modeling of mooring systems of floating Wave Energy Converters
2.2 - Design of Mooring Systems

3.1 - Generator systems for WED
3.2 - Energy storage system – design and modeling considerations

4.1 - Wave to Wire, overview
4.2a - Wave-to-Wire Models
4.2b - Development of a Wave to Wire model: Hydraulic PTO system implementation
4.3 - Advances in Modelling of Wave Energy Devices
4.4 - Experimental Validation of Numerical Models for Wave Energy Absorbers

5.1 - Reliability of wave energy devices, overview
5.2 - Reliability Assessment of the Wavestar Wave Energy Device

Host: DTU
Address: Building 421, Auditorium 73, Lyngby, Denmark

Wave Energy Utilitation - Design, Testing and Assessment of WECs

Wednesday 8. February 2012 at 8:30 - Friday 10. February 2012 at 16:00

Host: Fundación Ingeniero Jorge Juan
Address: Madrid, Spain

More information: http://www.ingenierojorgejuan.com/nveractividad.asp?id=226 


PhD courses on Wave Energy Utilization 2011

Tuesday 3. May 2011 at 9:15 - Friday 20. May 2011 at 14:00

In May 2011, the Wave Energy Research Group at Aalborg University, Department of Civil Engineering offers three consecutive weeks of PhD courses focused at the utilization of wave energy.

The PhD courses will run start from 3 May and end 20 May 2011.

Read more about the PhD courses here.

Host: Wave Energy Research Group, Dept. of Civil Engineering, Aalborg University


1st Symposium, The Plan - Industry feedback

Monday 30. August 2010 at 12:30 - 17:30

See invitation and programme for the 1st symposium here (.pdf-file)

Supporting Notes for the event, incl. participation list (.pdf-file)

Click on the links below to see the presentations at the symposium (.pdf):

Intro - WP 1 - WP 2 - WP 3 - WP 4 - WP 5

Address: DHI, Hørsholm, Denmark
More information: http://dhigroup.com/Contact/DHIOffices/HowToReachDHI.aspx
Registration deadline: Friday 13. August 2010 

European Ocean Power Open Days

Thursday 20. May 2010 at 14:00 - 16:00

14.00-14.45: An introduction to wave energy in general and activities within this field at Aalborg University
14.45-15.00: Break
15.00-16.00: Visit to the wave testing facilities at Department of Civil Engineering, where a wave tank with model of a wave energy converter will be demonstrated.

Language of the event is English.

Room: F-108 (Auditorium)

Contact person: Jens Peter Kofoed, jpk@civil.aau.dk, +45 2536 3936

Websites: www.eu-oea.com / www.civil.aau.dk
Host: Aalborg University, Department of Civil Engineering, Wave Energy Research Group
Address: Sohngaardsholmsvej 57, F-108, 9000 Aalborg, Denmark

Research Event 2010

Wednesday 7. April 2010 at 13:00 - 18:00

As an annually recurrent event, Research Event has become a concentrated communication of the research done by the Department and of the growing expertise within the fields of engineering. 

Please note, Jens Peter Kofoed is giving a presentation on "Structural Design of Wave Energy Devices".
Host: Department of Civil Engineering, Sohngaardsholmsvej 57, 9000 Aalborg, Denmark

Registration deadline: Wednesday 31. March 2010
Registration e-mail: info@civil.aau.dk