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 1 st, 2 nd and 3 rd 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 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 nd year / no basics in fluent mechanics yet Preparation course: – 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) H max < 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 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, 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