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Many of you asked questions about our efficiency, and we’re glad to share key simulation results with you. Here you can see all the important data (aerodynamic forces, mechanical efficiency, overall turbine efficiency and output) based on the 8 kW turbine performance.
The two primary aerodynamic forces at work in wind-turbine rotors are lift, which acts perpendicular to the direction of wind flow; and drag, which acts parallel to the direction of wind flow. The graph shows how those forces are changing with the change of wind speed. The ratio of these two parameters allows us to form a graph of mechanical efficiency. Its purpose is to show what percentage of energy remains after mechanical losses.
On the graph we can see that for this modification of Sirocco Wind Turbine the maximum mechanical efficiency is reached at 9 m/s. The Sirocco Wind Turbine design also allows the system to be adapted so that maximum mechanical and aerodynamic efficiency is achieved at other required wind speeds.
The highest electricity generation is achieved with the blade angles of 10 - 15 ° and an angle of attack of 6 °. Based on the data obtained from the simulations, in this conditions the wind turbine has a wind energy utilization ratio in the range of 32-56%. The graph also shows the actual efficiency of the system, taking into account the mechanical losses from the previous graphs.
Enjoy and get ready to cross the next $250000 milestone together with us!