To understand wind energy as a whole, technical competence and experience is required. It makes sense to us to explain to you some of the parameters relating to the power of the wind. The same principle applies to everything: not all wind is the same.
The power in wind
Wind is a balancing stream between high and low air pressure areas. Wind turbines use the kinetic energy of the wind and transform it into rotation. In this way mechanical energy is created, and with a generator it is transformed into electrical energy. What type of wind is the right one for generating wind energy? At our latitude, we have the main wind directions from the west and northeast. Mainly coastal regions and areas with regular, constant flows are used for wind power. However, not only countries with constant, strong winds, but also regions with changing wind directions and irregular winds offer adequate potential.
Not all wind is the same
Wind is not a static entity . Wind behaves differently in different situations. A calm wind at ground level does not mean that the same conditions prevail at fifty metres or higher. Height and temperature influence the air density measurably. The air density is decisive for energy production of a wind turbine. The air density is thinner at increasing heights. This fact must be taken into consideration, especially with the installation of a system in the mountains.
Third power for eight-sided performance
Assuming that the wind blows with a speed of 10 m/s for 30 minutes. The next 30 minutes are calm. The average wind speed in this hour is 5 m/s and the ensuing theoretical output is around 300 Wh/m² (watt hours per m²). As a comparison, we calculate one hour with a constant 5 m/s and get a theoretical output of around 75 Wh/m². Why is the wind performance four times smaller with the same average wind? The third power of the speed has the answer. If the wind speed doubles, we get eight times the output. The higher the percentage of strong wind, the more energy is yielded.