D-String

D-STRING®

D-STRING® IS A SIMPLE YET EFFECTIVE TECHNOLOGY DEVELOPED TO ELIMINATE CRACKS IN THE TRAILING EDGE MAX CHORD AREA BY ELIMINATING BREATHING AS THE ROOT CAUSE.
Breathing in turbine blades is caused by edgewise loading due to gravity and induce peeling in the adhesive bondlines near the trailing edge and close to the webs. Peeling in the adhesive bondlines directly cause cracks, which may lead to larger failures in your blades.
D-String® can be retrofitted up-tower for rotor blades in operation as well as installed in new blades before installation. D-String® has been thoroughly tested at DTU - Technical University of Denmark both in static and dynamic tests.
 
We are therefore confident that the installation of D-String® will positively affect the operation of your wind turbine.

  • Commercially viable solution that eliminates the occurrence of cracks on aging blades
  • Increased anticipated lifetime of blades
  • Secures operation of the blade without added maintenance cost
  • Minimised maintenance time reduces LCoE (Levelized Cost of Energy) and increases the profit margin
  • The cost of a single repair equals the cost of a D-String® kit for 3 blades (including installation)
  • Return on investment is less than 2 years
    ​​

The installation of D-String® does not affect the integrity of your blades.

EASY INSTALLATION OF D-STRINGS®

The D-String® can be installed up-tower using simple tools with either rope access, skylift or using a 360 degree platform.
Bladena assists with the installation of the D-Strings® and works with a network of independent service providers who ensures a reliable and cost-effective installation, meeting the highest standards safety and quality.