Capability Assessment of DTOcean Array Design Tool for Ocean Energy
Authors: Tianna Bloise Thomaz, Leonore van Velzen, Henry Jeffrey, Encarni Medina Lopez and Tom Wills
EWTEC 2019
This project has received funding from the European Union’s Horizon 2020 program under the grant agreement No. 745862
Services:• Techno and Socio-Economic Assessment
• Life Cycle Evaluation
• Array Optimization Analysis
• Technology Roadmaps
• Consultancy
Policy and Innovation GroupUniversity of Edinburgh
Main partners:
Team Leader [email protected]
policyandinnovationedinburgh.org
linkedin.com/company/policy-and-innovation-group
UK Ocean Energy Review 2018• Overview of developments in UK wave and tidal sector in 2017 in terms of:
• Key sector achievements• Supporting policies• Research and development• Technology demonstration
Wave and Tidal Energy: The Potential Economic Value• Potential of long-term economic benefits in terms of GVA of the wave and
tidal sectors out to 2050 by exploring an ambitions scenarios.
Policy and Innovation GroupUniversity of Edinburgh
policyandinnovationedinburgh.org
linkedin.com/company/policy-and-innovation-group
Objectives
• Assess DTOcean capabilities• Identified optimal and suboptimal
areas of DTOcean• Provide recommendations for tool
improvement
Objectives and AgendaCapability Assessment of DTOcean Array Design Tool for Ocean Energy
Agenda
• EnFAIT Project• DTOcean tool• Use of DTOcean on EnFAIT• Capability assessment of DTOcean• Conclusions
EnFAITEnabling Future Arrays in Tidal
• European Union Horizon 2020o Coordinated by Nova Innovation, 9 partners, 2017–
2022
• Demonstrate a grid-connected tidal energy array at a real-world tidal energy siteo Deployment of 3-6 turbines, in Shetland, Scotland
Current array layout
Possible future array layout
DTOcean1.0 2016
DTOcean2.0 2019
DTOceanPlus 2020/21
• DTOcean projecto European project FP7 (2013 – 2016)
Led by UEDIN, 18 partners from 11 countries
o Accelerate the industrial development of ocean energy
o Open source numerical tool for array optimisation
• DTOceanPlus projecto Ongoing project (2018 – 2021)o Will develop and demonstrate a 2nd
generation advanced design tool
DTOceanOptimal Design Tools for Ocean Energy Arrays
DTOcean versions
DTOceanArchitecture
User inputs & selections
RESULTSOptimisation
routines
Hydrodynamics ElectricalMoorings & Foundations Installations Operations &
Maintenance
Device
Site
Economics Reliability Environmental
• Array layout• Array orientation• Energy produced
• Electrical layout• Cable installation
technique
• Foundation type• Foundation mass
• Selection of vessel, equipment, port
• Installation plan
• Maintenance strategy• Downtime of devices• Availability
Use of DTOcean on EnFAITHow/why
Final assessmentLarger array
Use of DTOcean on EnFAITPlan
20212018 2019 2020 2022
Initial assessmentArray of 3 devices
Detailed assessmentArray of 6 devices
Sep 2019
Use of DTOcean on EnFAITMethodology
DTOcean results
NOVA design choices
STEP 1 Use of DTOcean
STEP 2Comparison between
results
STEP 3 Identification of areas
DTOcean strengths
DTOcean improvements
DTOcean limited design
choices
Capability AssessmentDTOcean strengths Tidal series
Gravity Foundation
Item DTOcean Existing array Area classification
AEP 102% 100% DTOcean strength
Foundation mass 71% 100% DTOcean strength
• Annual Energy Productiono Importance of AEP for the economic assessmento LCOE sensitive with AEP changeo High accuracy of AEP is extremely important
• Foundation masso Impact on costso Importance of foundation cost on total costso Mass calculation is correctly done by DTOcean specially
considering that no SF were applied by the user on the tool
Capability AssessmentDTOcean improvements
Item DTOcean Existing array Area classification
Offshore substation Yes No DTOcean
improvement
Cable layout One collector One cable per turbine
DTOceanimprovement
By the end of the project: 6 devices
• Substationo DTOcean: one offshore substationo Existing array: no offshore substation
• Export cableo DTOcean: one export cableo Existing array: three export cables (one per device)
Current stage: 3 devices
Capability AssessmentDTOcean limited design choices
Item DTOcean Existing array Area classification
Vessel selection Multiple One Limited design
choice
Preparationtime Cable loading Cable delivered
on reelsLimited design
choice
Existing Array vessel
DTOcean Library• Vessel selection
o DTOcean has a Library with commercial vesselso DTOcean makes a selection of the most cost effective combination of vesselso Nova Innovation designed turbines to be able to use Multicat vessels
• Preparation time for the installation of cableso DTOcean requires a cable loading rate to be considered for the calculation of
the preparation timeo Nova Innovation, considers the cable delivered on reels, negating the load rate
• This work: Identified optimum and suboptimum areas of DTOceanProvided recommendation for DTOceanPlus
• Suboptimum areas of DTOcean: DTOcean optimized for large commercial arraysTidal energy sector: Demonstration stage
• DTOcean (1.0 and 2.0) can be used to: Make strategic predictions for expanding array Assess cost reduction opportunities
• Use of DTOcean on EnFAIT will assist Nova Innovation to find an optimum array designThe sector development with Nova experience/feedback
ConclusionsDTOcean use on EnFAIT
DTOcean (1.0 and 2.0)DTOceanPlus
R&DTRL1-4
PrototypeTRL3-6
DemonstrationTRL5-7
Pre-commercialTRL6-8
Industry Roll-outTRL7-9
• Offsetting of wave and wind resource and resultant economic benefits: GB case study
• S. Pennock, N. Bharathi, D. Crooks, H. Jeffrey, P. Möller• Wednesday 14.20-14.40 : Room Agave
• Progress update on the development and testing of an advanced power take-off for marine energy applications
• S. Robertson, D, Noble, L. Castellini, M. Martini• Wednesday 16.00-16.20 : Room Elettra
• Towards Reliability-Based Geometry Optimization of a Point-Absorber with PTO Reliability Objectives
• C. Clark, A. Garcia-Teruel, B. DuPont and D. Forehand• Thursday 11.20 – 11.40 : Room Elettra
Other EWTEC presentationsPolicy and Innovation Group
Thank [email protected]
This project has received funding from the European Union’s Horizon 2020 program under the grant agreement No. 745862