Why can’t we have a second unit further down the shaft? Is it bird reasons?
In: Engineering
Because it’s all about disc area
A wind turbine with 20 meter blades catches 4x more wind than one with 10 meter blades. You really want the largest single wind turbine you can get so you get the most power out of the tower.
Being higher gives an advantage which is why wind turbines are often built on hills, but the tower height determines the maximum blade length which determines the power you get from your pricy construction project
If I build a 40 meter tower and my blades need 10 meters of ground clearance then I can have a 60 meter diameter fan! If you replace that with a smaller 30 meter diameter fan, that only leaves you space to add a 15 meter diameter fan. Your dual turbine configuration catches 5 units of wind while the single big one catches 8 with similar construction costs
Latest Answers