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Building nature-friendly Offshore wind farmsCEDA-NL / IRO Clubavond 12-03-2019

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Introduction

SUBMENU

• Foundation installation

• Tower installation

• Cable laying & burial

• Scour & cable protection

Introduction

Van Oord Offshore Wind

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Environmental effects we have to deal with…..

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Underwater Noise Many users ……cumulative effects

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• Installation noise

• Noise mitigation

• Mammal deterring system

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Challenges

• Induce biodiversity

• Shellfish reefs

• Increase species richness

Opportunities

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• Proactively repels marine fauna from dredging and construction works with specialized (safe) acoustics

Mammal deterring system

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Fauna Guard

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• Behavioral response studies to proof effectivity:

• in captivity – selection of safe sounds

• In the field – deterrence effect

Mammal deterring system

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FaunaGuardFauna Guard

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Distance from MP: ≤ 50 m

HSD IHC IMI AdBm

Distance from MP: > 50 m

Bubble Curtains

Noise reduction technology

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Near-field systems Far-field systems

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• First full scale test of the AdbMsystem

• Helmholtz resonators, tuned to 100 Hz

• Open system, 1 meter between the resonator panels

• Passive system, no continuous power supply necessary

• Potential reduction up to 35 dB

Demonstration AdBm noise reduction technology

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Passive Noise Abatement

3 pillars

Demonstration AdBm noise reduction technology

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Offshore Installation Vessel Lifting frame Resonator frames

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Demonstration AdBm noise reduction technology

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Deployment facility AdBm-system

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Van Oord reef guard

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North sea reefs

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Oysters – Outplacement Method

14Oosterscheldemuseum

WWF

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• October 2018: Oyster cages & Reefballs placed

• July 2019: Placement of substrate cages

Luchterduinen Windfarm

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Flat Oyster Pilot

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Innovation Site in Borssele OWF

2 MHI-Vestas 9.5 MW – V164 WTGs

Planned Innovations:

1. Slip Joint

2. ICCP Optimisation

3. TSA Coating

4. Cable routing

5. Eco-friendly Scour

Borssele V: Innovation project

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Project Overview

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Borssele V: Innovation project

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Oscar Bos

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Borssele V: Innovation project

18Engelsma et al., 2014

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• ‘Effects of burial on the Ostrea Edulis’

• Orientation of importance

• Dislodgement of oysters

• Experiments in flume tank

• Mobilisation of Oyster Guard

Borssele V: Innovation project

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Current experiments & research

CHAPTER / END

Thank you for your attention