Energy Research Institute @ NTU (ERI@N)

1 CleanTech Loop, #06-04 CleanTech One, Singapore 637151

Phone: (65) 6592 1786 / 2468 Fax: (65) 6694 6217

Dr. Srikanth Narasimalu

nsrikanth@ntu.edu.sg

Wind & Marine Energy: Overview

Energy Smart, Research Innovation. 30th Nov 2017

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Contents

Introduction

RD&D Focus Area and Competency

Accomplishments

Highlighted Projects

Strategic Plan

Technology & Capability Building

Deployment & Outcomes

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Key Members & Resources

Srikanth

NarasimaluProgram Director/

Senior Scientist

Sridhar IdapalapatiAssoc Professor

(MAE)

Ng Yin Kwee

Assoc Professor

(MAE)

Chai Gin Boey

Assoc Professor

(MAE)

Anshuman Tripathi

Senior Scientist

(ERI@N)

Suresh Sundaram

Asst Professor

(CSE)

Dong Zhili

Assoc Professor

(MSE)

Yang Yaowen

Assoc Professor

(CEE)

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Advanced Materials & Reliability

Advanced composites, multi-functional coatings,

3D Printing & laser based surface modification,

Tribology of drivetrain.

Condition Based Operation; Aging &

Environmental effect, Structural Health

Monitoring.

Product Development

Original designs for wind / marine low flow

turbines with Grid & energy storage integration.

Wave Energy systems, Floating solar system

Compressed Air Systems & CNG systems

Computational Simulation methods

Wind & Tidal turbine farm studies – Llyods/DNV

Wind & Marine resource mapping –Adv. CFD

models (with DHI, TMSI, ClassNK)

Aerodynamics, Hydrodynamics, Molecular

Dynamics, Multiscale modeling CFD based

design, analysis, lab & field verifications.

R&D W&M Peaks - Competences

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Wind: Research Focus of ERI@N

Resource Assessment

Wind Energy Forecasting

Wind resource mapping & turbine selection

Wind farm design simulation

Device Development

Low Flow Wind turbine for Tropical Region

Shallow Water foundation & tower technology

Complimentary Technologies

Structural Health monitoring & Condition based

maintenance

Grid Integration and Demand Response

Management

System Integration with Compressed Air Energy

Storage

Advances in Tribology

Additive manufacturing for metal based

components.

Gen

BESS

AC/DC DC/AC Grid

DC-DC

Turbine

wP dPbPC

A380

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Tidal Turbine Device Research

Novel Aero/hydrofoil shape & Rotor design

Low inertia drive train research

Light weight fatigue-resistant material research

Multi-functional coating research

Structural health monitoring Sensing system

Support Structure Research

Turbine Wake Field Studies

Fluid-structure interaction research for Mooring / Support Structure

Floating platform Under Wind-Wave Interaction

Research Against Environmental Impact

Effects on Marine Ecosystem

Seaweed / Debris Effect on Propeller Rotor

Anti BioFouling and Marine Corrosion coating

Underwater Acoustic noise

Grid integration studies

Research for Weak Grids & Fault Ride-Through Systems

Distributed grid System Integration

Energy storage system researchBiofouling

Marine RE Applied Research

What turbine design to use?

Seaweed entanglement

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Tropical Wind Turbine Research focus:

Remote region compatible Self erecting wind

turbine.

Novelty

Typhoon resilient designs.

Localized Energy Storage Coupled System

Cost effective material & processes.

Present Progress:

Successfully designed and manufactured a 3KW typhoon

resilient wind turbine and manufactured by industry

partner KLEM

Further Effort

Design in progress of 10KW turbine to deploy in Semakau.

Low inertial drive train

Hybrid Self erecting Tower

Concrete Pillar for

compressed air storage

Concrete foundation

After tilt up

Self load alleviating blade design

Hybrid Natural fiber coupled composites

Low Cut-in Speed Rotor

High lift low drag aerofoils

Semiconductor power electronics

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Tribology Research

Research Focus:

Research Domains

Failure Studies:

• Investigate offshore drivetrain failures

of Vestas.

• Critical analysis of:

• Bearing & Gear steels

• Functional coating

• Heat treatment effects

• Laser based surface morphology

• Lubricant degradation

• Corrosion mechanisms

• Condition Based Maintenance &

Controls

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Gear Enhancement Studies Research focus:

To improve and enhance the

performance of gears in wind power

applications through recent

advancements in materials and

processes.

Novelty

Alternative cost – effective bulk

material for gears.

Alternative surface morphology

techniques using advanced lasers.

Multi-Functional Coatings for wind

turbine gears.

Present Progress

Lab level testing and Scaled Prototype

testing

Further effort

To Field Test in 10MW turbine prototype

Planetary GearboxVestas wind turbine

Scuffing /Wear failure in Wind turbine gears

Bulk Material improvements

Laser based Surface morphology modifications

Surface coatings – Diamond

like Carbon (DLC) Multi-

functional coating

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Additive Manufacturing Studies

• Tailoring of compositions towards structural

components requirements.

• Manufacturing of specimens using tailored

compositions through Additive Manufacturing.

The dimensions of specimens were as per

ASTM standards.

• Evaluation of fatigue properties of Additive

Manufactured specimens.

• Additive Manufacturing of actual structural

component.

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Low Velocity Tidal Bladed Turbines Research

Technology disclosures filed.

Flow

Numerical and CFD Study of Following Options for Energy Extraction Enhancement

Extended Hub – Simple Nacelle

Lab Level Studies to Understand

Performance

Research focus: Develop tidal turbine systems for tropical conditions specifically for

islandic energy needs and to suit low flow tidal currents (~ > 2m/sec) and with low

wake length characteristics.

Present efforts include pilot field installation in

Sentosa, TMFT, Pulau Bukom, etc

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Floating Tidal System

Research focus: To evolve a towable

tidal turbine system to support

remote region’s energy needs.

To develop a modular sub-sea power

Conversion and transfer system.

Novelty: Semi submerged

deployment friendly tidal stream

floating platform which support the

tidal turbine for SEA region

Present Progress: Successfully

achieved a Barge based tidal turbine

deployment in Indonesian waters.

Further Work: To improve further a

compact tidal turbine power source.

* Tidal Energy Modeling Research Scope: To Provide better

understanding of effects of

blockage on the performance and

wake recovery of a single tidal

turbine and array

Workshop on Tidal Current

Extractable Energy: Modelling,

Verification and Validation

ERI@N hosted on 30th June, 2017

through teleconferencing.

Summarised report has been

submitted to OES.

Dr. Jérôme Thiébot, Associate

Professor, LUSAC / Caen

University, France

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Workshop Methodology and Time Plan

Item/ task Details 08’17 10’17 12’17 02’18 04’18 05’18

Region select For case study

Regional survey Site screening * *

Site assessment Localized area in a channel, estuary etc. *

Tidal energy modelling Pre-processing & discussion

Tidal energy modelling Model running & discussion

Tidal energy modelling Post-processing & discussion

Final report Numerical code – to – code to comparison and final

report

Methodology:

Selection of suitable site for case study. We have selected Alderney

race close to Cherbourg, France as the site for case study.

Selected site data acquisition through field measurements or from

online database.

Modelling through their chosen codes and expertise.

Submission of individual reports for code – to – code comparison.

Report sharing between different groups/teams.

Overall numerical code – to – code comparison report preparation

and submission to OES.

Time plan:

LATTITUDE RANGE: 49.5N-49.8N

LONGITUDE RANGE: -2.3W—1.8W

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Biofouling Test Rig

Research Focus: To develop

and test multifunctional

coating.

Present Progress: A dynamic

Test rig is deployed that could

study the biofouling & erosive

wear performance of the

coating under similar tidal

turbine operating parameters.

The test rig evaluates the

biofouling growth rate for

different coating materials.

The evaluation also studies the

durability of the coating under

turbid water conditions.

Dynamic Test Rig to

Study Biofouling

resistive coating

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Floating Solar in Ocean Conditions

ERIAN CONFIDENTIAL

Research Focus:

• Floating solar development and

deployment in tropical sea conditions.

• Structural integrity of floating solar in

deep waters

• Environmental Impact Assessment for

Floating solarFloating solar in tropical sea waters near

Semakau Island (illustration)

Floating solar deployed in Tengeh Reservoir.

Present Efforts:

• Design developments towards

tropic ocean conditions.

• Ocean loads resilient solar

structure is being developed.

Energy Research Institute @ NTU (ERI@N)

1 CleanTech Loop, #06-04 CleanTech One, Singapore

637151

Phone: (65) 6592 1786 / 2468 Fax: (65) 6694 6217

For further information please contact:

Executive-Director ERI@N

Email: D-ERIAN@ntu.edu.sg

http://erian.ntu.edu.sg

Thank you

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Topic 3. Wind and Marine Energies.

Several marine renewable energy sources (tidal, wave energy,

ocean thermal energy…) could have been considered but

offshore wind and tidal energies have been selected in priority

since they are of strong interest for both France and Singapore.

The tidal component of the Wind and Marine Energy topic will

be strongly devoted to CFD modelling studies: waves-current

interactions, interaction between turbines, wake effects,

Influence of waves, current fluctuations and turbulence on

energy production; it will be strongly based on benchmarking

and inter-comparison of models developed separately by

participants from Singapore and France. The second

component will be dedicated to offshore wind, with emphasize

on resource assessment in remote coastal location (tropical

regions) as well as on issues related to low flow tropical wind

turbine in shallow waters

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