Einfl sse der Lufttr bung, der Sonnenausdehnung und der Fl gelform auf den Schattenwurf von Windenergieanlagen

At present, shadow flicker periods are determined by purely geometrical models. This approach is questioned in the research project referred to in this article. The project investigates in detail the ambient conditions existing in reality. These are: 1. the finite extension of the sun 2. the trapezoidal structure of the rotor blades 3. the opaque atmosphere as a medium of radiation