Wave Energy – making it happen

Air turbines in Wave Energy

- the efficiency challenge

Wave Energy – making it happen 2

Challenges in Wave Energy

RELIABILITY:

▪ Temptation to test everything at once

▪ Failures never or seldom occur in the main components of the device

▪ Keyword to success : simplification

LEVELIZED COST OF ENERGY (LCOE=Lifetime Costs/Ener. Production)

▪ Still high in comparison with other renewables

▪ Prototyping is difficult because of high costs of innovation at sea

▪ Winner technology is proving hard to emerge

LYFE CYCLE ASSESSMENT (LCA) :

▪ Assessing the environmental impacts associated with all the stages of the product's life from raw material extraction through materials processing

▪ Not a clear winner against other renewable technologies

EFFICIENCY OF THE CONVERSION SYSTEM:

▪ Depends primarily on the pneumatic conversion ability of the WEC

▪ Depends 2nd on the Power Take-Off unit (turbine/generator) efficiency

Wave Energy – making it happen

Air turbines history in the company

together with IST

CORES FP7 - 2011:

▪ Wave conversion principle: Oscillating Water Column (OWC)

▪ Wave Converter: Backward Bent Duct Buoy (BBDB) from Ocean Energy

▪ Technology of PTO: Moving Guide Vanes (MGV) Impulse turbine

▪ Key features: Good operating range and mechanical complexity

▪ Efficiency : 55%

OPERA H2020 - 2018:

▪ Wave conversion principle: Oscillating Water Column (OWC)

▪ Wave Converter: Spar Buoy from Oceantec /IDOM

▪ Technology of PTO: Biradial turbine

▪ Key features: Excellent operating range; integrated High Speed Stop Valve

▪ Efficiency : 62%

BOMBORA Wales - 2020:

▪ Wave conversion principle: Submerged Membrane

▪ Wave Converter: BOMBORA mWave

▪ Technology of PTO: Unidirectional turbine

▪ Key features: Excellent operating range and high efficiency

▪ Efficiency : 80%

Wave Energy – making it happen 4

Air turbines efficiency evolution

OPERA H2020 - 2018CORES FP7 - 2011 BOMBORA Wales -2020

Wave Energy – making it happen 5

Secrets for a successful result:

▪ Use design solutions with proven manufacturability and assemblability

▪ Establish a sourcing strategy

▪ Develop a supply chain

▪ Qualify the suppliers

▪ Enforce a Quality Plan and follow it up

▪ Assist the suppliers on the delivery:

▪ Develop fabrication tools/jigs

▪ Define main manufacturing and assembly sequences

▪ Define intermediate tests to validate progress

Welding Assembly sequence of BOMBORA PTO

(video courtesy of ASM Offshore Methods Dept.)

Manufacturing a PTO

Wave Energy – making it happen 6

Secrets for a successful result:

▪ Select design approaches that with proven manufacturability and assemblability

▪ Establishing a sourcing strategy

▪ Develop a supply chain

▪ Qualify the suppliers

▪ Enforce a Quality Plan and follow it up

▪ Assist the suppliers on the delivery:

▪ Develop fabrication tools/jigs

▪ Define main manufacturing and assembly sequences

▪ Define intermediate tests to validate progress

➢ Assembly sequence of BOMBORA PTO (courtesy ASM Offshore Methods Dept.)

Manufacturing a PTO

Wave Energy – making it happen 7

Confidential – Property of Bombora Wave Power

➢ First grid connected mWave project

➢ First multi-leg mWave deployment (scalability)

➢ Alternative to existing diesel power generation

➢ Framework Agreement between Enzen and

Cabildo de Lanzarote

➢ Consortium team members assembled

➢ Grid connection application in progress

➢ Survey campaign in progress

➢ Grant application submitted

2018 2019 2020 2021 2022

2MW 28kW/m La Santa

Lanzarote Wave Park Project

AgreementSigned

Engineering & Approvals

Construction & Installation

Commissioning &Operation

Feasibility & Financing

Wave Energy – making it happen 8

▪ Project management – team of 24 industry specialists

▪ Technology provider & source of Background IP

▪ Local government

▪ Regulatory approvals & stakeholder management

▪ Consenting, regulatory approvals, stakeholder management & site development

▪ Main service provider

▪ Grid connection study and specification of power conditioning

▪ Design & development of electrical system

Bombora Wave Power Ltd

(Australia)

Cabildo de Lanzarote

(Spain)

Enzen Spain S.L.

(Spain)

Engie Laborelec

(Belgium)

▪ Aerodynamic design & testing of turbine

▪ Control law development & testing

Instituto Superior Tecnico

(Portugal)

▪ Mechanical design and supply of turbine assemblyKymaner Tecnologias

Energeticas (Portugal)

▪ Site development and financing advisorDP Energy

(Ireland)

Lanzarote Consortium Partners

▪ Membrane supplierTrelleborg

(Czech Republic)

Wave Energy – making it happen

Thank you for your attention