Reetablering af levetid på defekte vindmøllevinger EnergiForsk Juni

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Birgit Kirkegaard
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1 Reetablering af levetid på defekte vindmøllevinger EnergiForsk Juni Find Mølholt Jensen, Ph.d. CTO og stifter af Bladena ApS Bladena provides up-tower retrofitable structural enhancers for blades for wind turbines which once and for all are reducing the cost for maintenance and repairs, increasing the annual production of energy for lowering the cost of energy. 1 Bladena 2014 all rights reserved 1

2 Hvem er Bladena? Bladena er et spin-out fra Risø DTU hvor en række innovative design løsninger for vindmøllevinger er blevet udviklet. De innovative løsninger er alle patenteret og opfinderen har sammen med et stærkt professionelt (og kommercielt!) team opbygget en stærk position i marked primært inden for retrofit løsninger af vindmøllevinger. Bladena er i dag 10 fuldtidsansatte samt en professionel bestyrelse. Bladena har en række underleverandører der beskæftiger ca. 5 personer fuld tid. 2 Bladena 2014 all rights reserved

3 Bladena s historie Dec. 2011: Stiftelse af Bladena med CAPNOVA som investor+privat investor. Start Investering 1.2mio. Juli 2012: Accept for Bladena s første EUDP-projekt Juli 2012: Privat Investor investere 4,2mio. Juli 2013: Accept for Bladena s andet EUDP-projekt Okt. 2013: Yderligere kapital (6mio.) for den eksisterende ejerkreds Maj 2014: Yderligere kapital (3mio.) fra ny privat investor Kapital tilføjelserne er sket til stigende kurser, hvilket har betydet at ejere herunder stifter og DTU har kunne bevare en central ejerandel af Bladena. De øvrige ejere er Capnova og en stor privat investor, samt en række mindre investorer som har en andel i et investerings selskab kaldet Bladena Invest. 3 Bladena 2014 all rights reserved

4 D-String Deformation Limiting String Deformed panel 4 Bladena 2014 all rights reserved Undeformed panel Installed in the TE panels, 12 D-Strings will limit the Breathing of the blade in the max chord area.

5 Typical 12 D-Strings per blade The D-String limits the outward panels from breathing, hence reducing peel stresses in the bond lines Typical 12 D-Strings installed in max chord area Finite element model prepared for a specific blade sized by calibration with site measurements of the insitu panel deformations Without D-Strings With D-Strings installed 5 Bladena 2014 all rights reserved

First Demonstration Project First kit installed on a 2MW turbine in

Up-tower Installation By Platform or Rope Access Pictures from pilots

D-String testing program String and knots Fuse Cone D-String panel assembly All test

10 Second demonstration project Fatigue cracks in leading edge - X-stiffener Description Longitudinal cracks on leading edge are very often found on blades in operation after few years. FEM simulations show that the stresses are increased in the leading edge area, when the blade is distorted in transverse shear. Longitudinal crack Supported by EUDP. Budget 3.7mio Euros 10 Bladena 2014 all rights reserved

13 Partners in new project supported by EUDP UNIVERSITIES ENERGY UTILITIES SERVICE COMPANIES T otal W i n d B l a d e s A p S TEST FACILITIES & CERTIFICATION BLAEST BLADE DESIGN & MANUFACTURE MARKET ANALYST BOVING HORN R&D CONSULTANCY ECC RETROFIT SOLUTION PROVIDER 13 Bladena 2014 all rights reserved

14 Torsion caused by the deformed blade results in a important contribution to cross-sectional shear distortion Together with the increasing edgewise loads, the offset load (from undeformed) results in oscillation deformation of the cross section 14 Bladena 2014 all rights reserved

15 Clamps which are used in full-scale test prevent shear distortion failure Loading clamps which are used in commercial test Combined flapand edgewise loading New load clamps are used in the full-scale test facility at Risø DTU. The anchor plates allow the blade to distort. 15 Bladena 2014 all rights reserved

16 Opsummering - Succesfuld spin-out kræver støtte fra den danske stat både i form af EUDP-programmer og statslige investorer Gennem risikovillige investeringer af statslig, regional og egen kapital er CAPNOVA med til at udvikle innovative iværksætteres 16 Bladena 2014 all rights reserved

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