The price of electricity produced using wind energy depends on the cost of building the turbine, on the lifetime of the turbine, on servicing costs, and on the amount of energy produced.
The biggest cost is the turbine column with foundations. A big expense during installation is lifting the nacelle and the arms of the turbine to the top of the column. Large cranes are used for this.
The amount of energy produced depends on the third power of the wind speed and on the number of working hours during the year. The higher the turbine, the stronger the wind, so it can produce more energy.
The bigger the wind turbine, the lower the cost in relation to the amount of energy produced. That is why more and more wind turbines are being built.
Installation and servicing costs could be significantly reduced if the jib gondola could be raised and lowered without the use of large cranes, which are expensive and limited in size.
This problem could be solved in a very simple way, shown in the picture above.
The nacelle (2) should have a ring (3) inside it, which could move up and down on the turbine pole (1), by lifting and lowering with steel ropes (13) that descend from the top of the turbine pole (1) to the nacelle (2). .
On the front side of the nacelle (2) there is a rotor (4) with arms (5). On the rotor (4) there is a large gear (6) that rotates together with the rotor (4). The diameter of the rotor (4) is equal to the width of the turbine column (1). When the rotor (4) rotates, the large gear (6) also rotates, on which the small gear (7) rests, to which the rotation is transmitted. This rotation is transmitted via the shaft (8) to a larger sprocket (9), through which the rotation is transmitted to the generator sprocket (10). The larger sprocket (9) and the generator sprocket (10) are connected by a chain (11) that transmits rotation. In this way, the rotation is transmitted via the shaft (8) which is located on the side of the turbine column (1), and thanks to this, the entire gondola (2) with the rotor (4) and the generator (12) can be raised and lowered along the turbine column (1) ), up and down.
A turbine with such a nacelle would have much lower installation and servicing costs. Larger wind turbines could also be built. Thus, the energy produced by this type of turbine could be cheaper.