You could have horizontal axis turbines with half of them rotating clockwise and half anticlockwise, though it seems the effect is minor, less than 2%: "counte

You could have horizontal axis turbines with half of them rotating clockwise and half anticlockwise, though it seems the effect is minor, less than 2%: "counter-rotating configurations were more efficient in power generation than the control case in which all turbines have one clockwise rotor; the alternate-row case was found to produce 1.4% more power " https://www.sciencedirect.com/science/article/abs/pii/S2213138816301072 https://www.sciencedirect.com/science/article/abs/pii/S22131... Overall there's probably a lot of ways left to optimize on wind farm level. For example the yaw angles https://www.sciencedirect.com/science/article/abs/pii/S0306261920310230 https://www.sciencedirect.com/science/article/abs/pii/S03062...