Fig. 5

Performance of the sombrero-shaped wind tunnel and its dual-rotor machine (a) considered wind speed, (b) rotational speed, (c) torque, and (d) power pior to EESG’s grid connection.

Performance of the sombrero-shaped wind tunnel and its dual-rotor machine (a) considered wind speed, (b) rotational speed, (c) torque, and (d) power pior to EESG’s grid connection.