Starting points for discussion
on the
Wind Turbine Design Competition
(REMARK: also read the notes to the sheets)
Small windturbines
Problem
Potential of small wind turbines is not utilized despite of their application and flexibility
w.r.t. implementation.
Reasons
Quality backlog
• Disappointing Performance (efficiency, reliability)
• High specific price
Knowledge gap
• Difficult to compare performance between turbines
• Problems with yield predictions in different (local) wind conditions
• About potential and possibilities for integration
(part of the) solution
• Quality improvement (efficiency, cost, reliability) and innovation
• Increase knowledge base (performance data and comparability, predictability of energy
production, operational experience, requirements for acceptance)
Wind Turbine Design Competition, PLAN
Goal
• Innovation and education by international design competition for small wind turbines
• Qualitative improvement of knowledge base by testing and operation experience
• Quantitative improvement by performance measurements and monitoring (data base)
Cooperation with FORWIND, UAS Bremerhaven, UAS Kiel, (InHolland?)
Description
• competition between student teams in the design, manufacturing and commissioning of
small wind turbines
Deliverables
• working turbine, design report, manual, commissioning report, presentations
Requirements
• Compliance with standards (or selected articles)
• Dimensions of turbines TBD (diameter <1.5m)
• Design for a specified wind climate
Wind Turbine Design Competition: APPROACH
Each institute may submit up to two turbines for the competition
Grid connected? no further restrictions to the chosen concept
Design for a wind climate typical for small wind turbines
Project driven by the student teams themselves
Planning
• Duration 1 year / yearly organized
• Detailed design, production and testing in 1st, 2nd and 3rd semester
• Submission to the competition: beginning of June
• Jury evaluation and award ceremony during symposium in July
Wind Turbine Design Competition: EDUCATIONAL ASPECTS
Technical skills
• Aerodynamics.
• Energy conversion,
• Control & safety system,
• Structure and loads
• Compliance with standards
• Grid integration
• Environmental aspects
• Production
• Commissioning / availability / troubleshooting
• Technical report and drawings,
• User manual & PR leaflet
• Working in teams and project organization
Other
• International cooperation / competition
• Knowledge exchange on symposium
• “Commercial” presentation on fair
Wind Turbine Design Competition: EVALUATION CRITERIA
Innovation:
• Design features (methods for energy conversion, grid connection, control,
safety system, structure, reliability and O&M solutions)
• Production (suitable for mass production, number of parts, productions steps
or actions)
• Environmental aspects (material and energy use, cradle to cradle)
• Visual appearance and acceptance, integration (integration in built
environment, buildings)
Quality
• Energy production in specified wind climate
• Energy pay back time
• Reliability and O&M solutions
• Design report and drawings, manual
• Presentation on symposium / fair
Evaluation by a jury (teachers, specialists and others) based on product
assessment, design report, commissioning report, measurements)
Wind Turbine Design Competition: TO BE DETERMINED
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The plan
Wind turbines: size?, grid connected or not?, compliance with standards?
Participation (invitations to other institutes?)
Contact persons for the organization
Agenda, planning
Final ceremony: activities, prizes, date, jury,…
What are the IEC requirements for small wind turbines?
………..
NHL approach, followed in 2012
• 2nd year / no basics in fluent mechanics yet
• Preparation course:
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Explanation on P-V, wind climate, energy production
Cp-lambda for different WT concepts from literature
Starting points: wind climate / dimensions / safety requirements
Load dimensioning (generator design & testing)
• Fabrication and assembly
• Commisioning
• Testing
Comment Peter Schaffarczyk, UAS Kiel,
• Criterium for evaluation: use highest energy production in moderate V
claimate and high σ
• Let students also make a “begroting”: production hours, planning, costs
(education: compromises must be made, $ is limited)
• Compare with formula “student competitions”
• Use low voltage: safety, education (instead of buying black box)
• Hmax< 10m
• Likes measurement on a car.
• Study cv = strict, little flexibilityct NL
• 8-10 credits for this project (30 in a semester)
Comment Stephan Barth, Michael Holling, FORWIND
• Prefers testing in wind tunnel over testing on a driven platform (ref Andrea
Reuter: WT on Volvo = unreliable/ permission only for GB based industry)
• Suggests DLR wind tunnel or 2x2m wt in Varel van Deutsche Wind Gard (of
een grote wt in Wilhelmshaven?)
• 1 year is too little time for this project (not real)
• No problem with participating at a later stage
• KISS in the beginning of the project
• Safety = important
– Ask for evidence of max loads and RPM
– Comply with simplified load assumptions
– “certification committe: ask GH
• E is maost important criterium. To be measured in wind tunnel (ramp V
test performance and quality of control and safety system)
Comment Henry Seifert, UAS Bremerhaven
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Important: 1 robustness, 2 robustness, 3 robustness,
bremerhaven has an airstrip that will be closed next year: good runway for
driven platform
Safety = important
– Comply with simplified load assumptions to be determined by “certification body”, oa Vmax
– invite industry (jury, material sponsors,
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Specify the measurement system
Duration? 1 or 1.5 year for complete program. High workload for students,
they will complain
Planning: specification, design with certification report, evaluation report and
go/nogo, production, commisisoning, measuring, symposium.
Up to and including certif report: 25 credits, rest 5 credits
Blade testing acc to IEC defined by commission