Analysis of Power Performance and Mooring Fatigue Damage for Wave Energy Parks
Licentiate thesis, 2023

Wave energy has been recognized as a promising alternative to traditional energy sources due to its cleanliness and sustainability. To harness this energy, wave energy converters (WECs) are utilized. These WECs operate using a variety of working principles and are typically deployed in large numbers in the form of wave energy parks to generate electricity with high efficiency and low levelized cost of energy (LCOE). However, the interaction effects between multiple WECs can positively or negatively impact power performance and mooring fatigue damage, highlighting the importance of numerical methodologies to evaluate such effects and facilitate agile wave energy park design processes.

The primary objective of this thesis was to develop numerical methodologies and data post-processing techniques to effectively access single WECs and wave energy parks consisting of two different WEC concepts belonging to the point absorber group: WaveEL and NoviOcean. Specifically, two methodologies were built based on the potential theory and a computational fluid dynamics (CFD) method, for which the boundary element method (BEM) and direct numerical simulation (DNS) with volume of fluid (VOF) modelling were adopted, respectively. These methods were implemented using the software, DNV SESAM and STAR-CCM+. The WEC concepts were evaluated in terms of the performance and mooring fatigue damages of each WEC concept with varying WEC generations, wave conditions, wave incoming directions and wave park layouts.

This thesis contributes to a better understanding of WEC system modelling, power performance and mooring fatigue damage estimation. Ultimately, these findings are anticipated to facilitate the development of optimized wave energy park layouts in the future.

mooring fatigue

power output



potential theory

wave energy park



Delta+Gamma i M-building, Hörsalsvägen 7A
Opponent: Prof. Zhiqiang Hu, School of Engineering, Newcastle University, UK


Xinyuan Shao

Chalmers, Mechanics and Maritime Sciences (M2), Marine Technology

A comparison of the performance and characteristics of two generations Waves4Power WaveEL wave energy converters

Proceedings of The 5th International Conference on Renewable Energies Offshore (RENEW 2022),; (2022)p. 277-284

Paper in proceeding

Fatigue of mooring lines in wave energy parks

Advances in the Analysis and Design of Marine Structures - Proceedings of the 9th International Conference on Marine Structures (MARSTRUCT 2023),; (2023)p. 205-211

Paper in proceeding

X. Shao, H.-D. Yao, J.W. Ringsberg, Z. Li, E. Johnson. (2023). Performance analysis of two generations of heaving point absorber WECs in farms of hexagon-shaped array layouts.

X. Shao, H.-D. Yao, J.W. Ringsberg, J. Skjöldhammer, J. Lin. (2023). FSI simulation and analyses of a non-resonant buoyant wave energy converter.

INTERACT - Analysis of array systems of wave energy converters with regard to interaction effects in the LCOE and fatigue analyses

Swedish Energy Agency (2019-026869), 2020-09-01 -- 2022-11-30.

Control of wave energy converters based on wave measurements, for optimal energy absorption (WAVEMEASURE)

Swedish Energy Agency (50197-1), 2020-09-01 -- 2023-03-31.

Driving Forces

Sustainable development

Innovation and entrepreneurship

Subject Categories

Applied Mechanics

Fluid Mechanics and Acoustics

Marine Engineering

Areas of Advance



C3SE (Chalmers Centre for Computational Science and Engineering)



Delta+Gamma i M-building, Hörsalsvägen 7A


Opponent: Prof. Zhiqiang Hu, School of Engineering, Newcastle University, UK

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