Wind power is the one of the most ancient and easily available sources for generating renewable energy. The technological advancements have now enabled even small turbines to generate more power. However, the load carrying capacity of wind turbines is still a problem mainly due to the manufacturing defects in turbine blades, which ultimately lead to turbine failure.
Four main parameters lead to a turbine failure the number, type, size and location of defects within the blade. The type of defect decides a particular failure mode. The size affects the amount of strength reduction and the position determines the critical loading and failure modes.
Currently, the turbines undergo NDT methods of visual and ultrasonic inspections that do not prove to be foolproof in determining every kind of defect present. Consequently, some amount of destructive testing is associated with it to keep a check on manufacturing process. This is neither cost effective nor efficient. In addition, it leads to wastage and still does not ensure reliability. Furthermore, inspection is also required during operational life to keep track of stress and fatigue undergone by the turbine blades.
CITs Digital Radiography provides a complete NDT and NDE solution for entire lifecycle of a turbine. The computed radiography and the flat panel based radiography technologies are capable of detecting minute defects ranging from cracks to delamination. CIT also offers advanced NDE software solutions that can measure the defects for sizes and depth, carry out Risk Based Inspection (RBI) and store all the data digitally in secure archives.