The blades are the heart of a quality wind turbine system - they are what makes the turbine produce power and the life of the generator is very closely linked to the accuracy of manufacture of the blade.
Many Chinese wind turbines use fibreglass blades produced by a hand lay process - often in Inner Mongolia where labour costs are even less
Typically this produces a heavy blade with uneven weight distribution of the production material along the length of the blade making balancing the blades extremely difficult.
If produced with strict quality control a hand produced blade will be heavy but strong but any manufacturing defects such as incorrect impregnation of the resin are potentially disastrous. This is not an exaggeration - a defect in the manual manufacturing process will produce a blade with a weak point which is likely to break. If a wind turbine blade breaks in strong winds then there is a serious risk of injury or death to anyone struck by the fractured blade and the drastic vibration which results will bring the tower down – a statement of fact
In fact the materials used for the production of a wind turbine blade are all world commodity market price. In order to reduce the cost of the resin many Chinese manufacturers use a high % of filler in the resin. This has very little effect on the strength of blade but the resin with filler is brittle and after a period of use the gell coat cracks allowing water ingress ....and this is the beginning of the end.....for both the blades and the generator
Manufactured in the UK Energever are very pleased to offer sale the Futurenergy Range of Intelligent Control Upwind Turbines Available in 5Kw, 10Kw and 20Kw models we believe that this range of turbines provides the best economic return of any turbine on the market today considering all factors such as power production, the whole life cost and the design life