Value Proposition

Kitenergy’s strategy builds on its strong Value Proposition:

  1. Altitude wind is stronger and regular = higher equivalent hours at nominal power

  2. Extremely competitive energy cost in target markets

  3. Mobility and possibility of rental and relocation

  4. Extremely low ecological footprint

  5. Limited visual and noise impact

  6. Fast decommissioning leaving unspoiled landscape

The power of high-altitude wind

Kitenergy generators will operate at significantly higher altitudes above the ground, where stronger and more frequent winds are blowing worldwide, well over the 200 m reached by the blade tips of latest windmills technology. This means higher amounts of yearly generated energy. Due to wind variations in speed and direction, on a given site the energy produced by a wind generator at the nominal power in a single year is measured by its Capacity Factor (CF).

Recent studies show that the wind power available at 800 m is about 4 times the power available at 80 m above ground. High-altitude wind has the largest energy per square meter (W/m2) among all the renewable energy technologies.

In good sites , Kitenergy technology can reach a capacity factor up to 50%, a value greater than the latest horizontal axis windmills technology. Even assuming a comparable total cost of installation, the economic return with Kitenergy’s technology beccomes higher.

In addition, many sites where present wind power technology cannot be competitive because of limited wind resource and complex logistics can still represent economically convenient solution for Kitenergy’s technology.

Higher power density in wind farms

Kitenergy’s technology can achieve a power density higher than current wind turbines when considering a wind farm installation. Such exceptional figures can be achieved on the basis of the increased flexibility in wind farm layout optimisation e.g. the possibility of coordinating the wings flight at different altitudes, thus avoiding aerodynamic interference.

KNRG vs windmills

Light, dynamic and intelligent machines

The key idea of Kitenergy is to harvest high-altitude wind energy with the minimal effort in terms of generator structure, cost and land occupation. In the actual wind towers, the outermost 30% of the blade surface contributes for about 80% of the generated power. Thus, the tower and the inner part of the blades do not directly contribute to energy generation. Yet, the structure of a wind tower determines most of its cost and imposes a limit to the elevation that can be reached.

To understand the concept of Kitenergy, one can imagine to remove all the heavy and static structure of a wind tower and just keep the outer part of the blades, which becomes a much lighter wing flying fast in crosswind conditions, connected to the ground only by the two ropes. Thus, the rotor and the tower of the present wind technology are replaced in Kitenergy technology by the wing and its ropes, realizing a wind generator which is largely lighter and cheaper. For example, in a 250 kW wind turbine, the weight of the rotor and the tower is typically about 50 t. A KITEnrg-yoyo generator of the same rated power can be obtained using a 250-m2 wing and ropes 1000-m long, with a total weight of about 10 t only. Therefore, it is expected that the construction costs of a KE-yoyo generator will be lower than those of a wind tower of the same rated power.

A revolution in renewable energy generation

All the aspects described so far have been considered to estimate the cost of high-altitude wind energy produced with Kitenergy. Indeed, the obtained results indicate that this technology has the potential of generating renewable energy, available in large quantities almost everywhere, with lower production costs than those of fossil energy.