*7.3. Piezoelectric Materials*

The purpose of the use of piezoelectric materials is different from the use of wind and tidal turbines. These objects produce a small amount of energy compared to the turbines. They are used to take advantage of the space that exists on the tower and to make the best use of the wind.

Knowing that the available area is approximately 108 × 2.62 m for the application of piezoelectric materials and considering that each piezoelectric has a height of 0.2 mm and a width of 13 mm, we can install a total of 540,200 materials in rows of 200 materials. The materials in each row are connected together in series, and the rows are connected in parallel. This allows that if a material goes bad, only the queue with the material that stops working is affected, making it affect the system as little as possible.

The power generated by piezoelectric materials is only an approximation since these materials produce energy due to pressure fluctuations exerted on them, and these fluctuations are not possible to simulate with the software used. Since this simulation is not possible, this calculation was performed using an approximation. The pressure exerted on the material during 1 s was calculated, and it was assumed that this pressure was the same exerted during the 24 h of a day.

The power calculation is performed through the results taken from the simulation (voltage and current density) and multiplied by the area where the wind pressure is exerted.

After performing these calculations, it is estimated that a generated power of 20 W and daily energy of 480 Wh and 168 kWh a year.

It was seen that the reduced generated power was capable of feeding a lighting signal for a turbine, but the flags found have powers between 30 W and 60 W.

The calculation of the power generated is a calculation based only on the average wind speed occurring at the chosen location and, therefore, it is possible to generate higher power and, in turn, feed an LED light (30 W).
