Bladena
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      Phases

      • Purchase of turbines
      • Commissioning of blades
      • End of warranty
      • Operation
      • Lifetime extension

      Solutions

      • D-String®
      • D-Stiffener™
      • X-Stiffener™
      • D-TE™

      Courses

      • Structural Blade Course

      Tools

      • CAR Tool
      • Blades Data
      • Structural Analysis
      • Elastic instabilities
      • Testing

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  • International Conference 2022
  • Services & Solutions

      Phases

      • Purchase of turbines
      • Commissioning of blades
      • End of warranty
      • Operation
      • Lifetime extension

      Solutions

      • D-String®
      • D-Stiffener™
      • X-Stiffener™
      • D-TE™

      Courses

      • Structural Blade Course

      Tools

      • CAR Tool
      • Blades Data
      • Structural Analysis
      • Elastic instabilities
      • Testing

      Downloads

      • All Downloads
  • Cases
  • R&D Projects
  • Who we are

      Who we are

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Case 4 - D-String®

Problem

Picture

Tegnebræt 5 kopi 2
Multiple transverse cracks max chord region

Solution requested


Stop crack propagation in blades without structural repairs
Gain min. 5-10 years of blade life time

Case details


1.5 MW
Turbine
37m
Length
2007
Year of commision

Deliverables


Technical opinion
6 blades with D-String®

Case pictures

Results


No maintenance cost for structural repairs in 3 years
2-3 weeks of extra availability per year
Achieving additional lifetime of min. 5-10 years is feasible

Cases


sample62

Blade course

2 days advanced structural blade course
sample62

D-Stiffener™

Elimination of open trailing edge in mid span
picture

D-Stiffener™

D-Stiffener™ installation on 75 blades in South America
© Bladena 2020, Banestrøget 13, 1, 2630 Taastrup
  • International Conference 2022
  • Services & Solutions

      Phases

      • Purchase of turbines
      • Commissioning of blades
      • End of warranty
      • Operation
      • Lifetime extension

      Solutions

      • D-String®
      • D-Stiffener™
      • X-Stiffener™
      • D-TE™

      Courses

      • Structural Blade Course

      Tools

      • CAR Tool
      • Blades Data
      • Structural Analysis
      • Elastic instabilities
      • Testing

      Downloads

      • All Downloads
  • Cases
  • R&D Projects
  • Who we are

      Who we are

      • About us
      • Management & Board
      • Career
  • News
  • Contact