Repairing composite wind turbine blades, which are often made of layers of wood, fiberglass, and epoxy, involves first heating the epoxy so it seeps into all crevices created by the damage. The material must be heated slowly so as not to damage its effectiveness, then it must be cured by a slow reduction in the heat.
Tempco’s method includes silicone rubber heaters, thermocouples, and the electronics mounted in a custom cabinet (pictured) sized to fit through a typical windmill access port.
A vital component of this system is the Tempco PPR-1800 Videographic Data Logger from Tempco Electric Heater Corp., Wood Dale, Ill. It features several channels that let users monitor several locations along the entire repair area, and take action if the predetermined temperatures are not what they should be. The logger can also record and store the progress of each sensor and hence confirm the correct process performance. This is both for quality control as well as communicating verification of the process to all required third parties.
Filed Under: Uncategorized