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Riblet-Surfaces for Improvement of Efficiency of Wind Turbines

Objective

The main objective of Riblet4Wind is the transfer of a technology that has already demonstrated its capacity for increasing the energy efficiency in the aeronautics sector, to the wind energy industry.

Application of functional coatings with riblet structure will improve the drag to lift ratio of rotor blades significantly. Wind tunnel experiments have proven the capability of this riblet-coating technology to increase the efficiency of wind turbines by up to 6%.

This direct effect will allow gaining the same amount of electrical energy with smaller rotor blades. Indirect effects will increase the benefit to approximately more than 10%:

• The improved drag to lift ratio will allow operation at lower wind speeds. The earlier cut-in of the WTG will improve the facility to balance in the electrical grid system.

• The riblet structure improves the stall and turbulence behaviour of the rotor blades thus allowing also operation at higher wind speeds and/or operation in less optimum wind conditions, e.g. changing wind directions or gusts.

• The improved drag to lift ratio will reveal design options due to changes of the design loads.

• The riblet structure will also result in a substantial reduction of noise emissions.

It is expected that the interaction of direct and indirect effects will contribute significantly to the targets of the European Wind Energy Technology Platform (TPWind) as declared in the new Strategic Research Agenda / Market Deployment Strategy (SRA / MDS) : a reduction of levelised costs of energy (LCoE) by 20% (onshore) respectively 50% (offshore) until 2028 (LCoE reference 2008).

Beyond the focus of the topic H2020-LCE3-2014 the riblet-paint technology can also be applied on existing rotor blades, thus supporting retrofitting of existing wind turbines and maximising the benefit.

In total Riblet4Wind aims at demonstrating the successful transfer of the riblet-coating technology and the semi-quantitative assessment of the direct and indirect effects.

Field of science

  • /social sciences/economics and business/business and management/commerce
  • /engineering and technology/materials engineering/coating and films
  • /engineering and technology/environmental engineering/energy and fuels/renewable energy/windpower
  • /engineering and technology/environmental engineering/waste management/energy efficiency
  • /engineering and technology/mechanical engineering/vehicle engineering/aerospace engineering/aircraft
  • /engineering and technology/electrical engineering, electronic engineering, information engineering/electrical engineering/power engineering/electric power distribution

Call for proposal

H2020-LCE-2014-2
See other projects for this call

Funding Scheme

IA - Innovation action

Coordinator

FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Address
Hansastrasse 27C
80686 Munchen
Germany
Activity type
Research Organisations
EU contribution
€ 1 118 250

Participants (6)

BIONIC SURFACE TECHNOLOGIES GMBH
Austria
EU contribution
€ 359 136,75
Address
Liebenauer Hauptstrasse 2-6
8041 Graz
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
ELTRONIC A/S
Denmark
EU contribution
€ 522 812,50
Address
Spettrupvej 7A
8722 Hedensted
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
E.ON CLIMATE & RENEWABLES UK LIMITED
United Kingdom
EU contribution
€ 139 125
Address
Westwood Way Westwood Business Park
CV4 8LG Coventry West Midlands
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
MANKIEWICZ GEBR. & CO. GMBH & CO KG
Germany
EU contribution
€ 216 475
Address
Georg Wilhelm Str 189
21107 Hamburg
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
MUEHLHAN A/S
Denmark
EU contribution
€ 453 372,50
Address
Nyvang 16 2Nd Floor
5500 Middelfart
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
UNIVERSITAT DE BARCELONA
Spain
EU contribution
€ 498 000
Address
Gran Via De Les Corts Catalanes 585
08007 Barcelona
Activity type
Higher or Secondary Education Establishments