Optimum Design of Rotor and Hub for Horizontal Axis Wind Turbine:A Case Study

摘要

In this paper the aim was to design 700kw wind turbine hub.The conventional hub used so far is of circular type but problem with such h ub is that many casting defects arise;so it was decided to use straight beams of standard cross sections and fabricate them to make skeleton of hub.Initially the simplest triangular hub was designed but due to space problem it was decided to select hexagonal hub.The concept of this hexagonal hub is totally new and was never used earlier.All the loads caused by wind and inertia on the blades are transferred to the hub,so mechanical strength of hub becomes very vital in the wind turbine design.The design has been done according to types approval provision scheme.The mechanical as well as other safety considerations have been considered in this design.The analysis involves use of modeling and simulation software.The stress and deflection were also calculated.This is a static analysis and preliminary stage of design,so many more improvement can be incorporated in future.