5.3 ORIENTATION OF THE ROTOR AXIS W

5.3 ORIENTATION OF THE ROTOR AXIS
Wind turbines are further classified by the orientation of the axis of the rotor with respect to the ground: horizontal-axis wind turbine (HAWT) and vertical-axis wind turbine (VAWT; Figures 1.7 and 5.6). The rotors on HAWTs need to be kept perpendicular to the flow of the wind to capture the maximum energy. This rotation of the unit or rotor about the tower axis, yaw, is accomplished by a tail on upwind units (small wind turbines, up to 10 kW, although there have been tails on some 50 kW units), by coning on downwind units (Figure 5.7), or by a motor (electric or wind [fan tail rotor]) to drive the unit around the yaw axis. Coning is where the blades are at an angle from the plane of rotation.
VAWTs have the advantage of accepting the wind from any direction. However, the Darrieus wind turbine is not reliably self-starting, as the blades have to be moving faster than the wind to generate power. So the induction motor/generator or another motor is used for start-up to get the blades moving fast enough that they generate positive power. The giromill (Figure 5.8) may have articulated blades, which can change angle on the rotational cycle, so it can be self-starting. Another advantage of VAWTs is the speed increaser and generator can be at ground level. There are two disadvantages: the rotor is closer to the ground, and there is cyclic variation of power on every revolution of the rotor.

Résultats (Anglais) 1:

5.3 ORIENTATION OF THE ROTOR AXIS Wind turbines are further classified by the orientation of the axis of the rotor with respect to the ground: horizontal-axis wind turbine (HAWT) and vertical-axis wind turbine (VAWT; Figures 1.7 and 5.6). The rotors are HAWTs need to be kept perpendicular to the flow of the wind to capture the maximum energy. This rotation of the unit gold rotor about the tower axis, yaw, is accomplished by a tail on upwind units (small wind turbines, up to 10 kW, although there have been tails on some 50 kW units), by coning on downwind units (Figure 5.7), or by a motor (electric or wind [fan tail rotor]) to drive the unit around the yaw axis. Coning is where the blades are at an angle from the plane of rotation. VAWTs have the advantage of accepting the wind from any direction. However, the Darrieus wind turbine is not reliably self-starting, as the blades have to be moving faster than the wind to generate power. So the induction motor/generator or another motor is used for start-up to get the blades moving fast enough that they generate positive power. The giromill (Figure 5.8) may have articulated blades, which can change angle is the rotational cycle, so it can be self-starting. Another advantage of VAWTs is the speed increaser and generator can be at ground level. There are two disadvantages: the rotor is closer to the ground, and there is cyclic variation of power on every revolution of the rotor.

Résultats (Anglais) 2:

5.3 ORIENTATION OF THE ROTOR AXIS
Wind turbines are further Top classified by the direction of the axis of the rotor with respect to the ground: horizontal-axis wind turbine (HAWT) and vertical-axis wind turbine (VAWT; Figures 1.7 and 5.6). The rotors are HAWTs need to be Kept perpendicular to the flow of the wind to capture the maximum energy. This rotation of the unit or rotor about the tower axis, yaw, is Accomplished by a tail is upwind units (small wind turbines, up to 10 kilowatts, although There-have beens Details On Some 50 kilowatts units), by coning is downwind units ( Figure 5.7), or by a motor (electric or wind [fan tail rotor]) to drive the unit around the yaw axis. Coning Is Where the blades are at an angle from the plane of rotation.
VAWTs-have the advantage of the wind from accepting Any direction. HOWEVER, the Darrieus wind turbine is not reliably self-starting, as the blades-have to be moving faster than the wind to generate power. So the induction motor / generator gold Reviews another motor is used for start-up to get the blades moving fast enough That They generate positive power. The giromill (Figure 5.8) May-have articulated blades, qui can change rotational angle on the cycle, so it can be self-starting. Another advantage is the speed of VAWTs increaser and generator can be at ground level. There are two Disadvantages: the rotor is closer to the ground, and There is cyclic variation of power on every revolution of the rotor.

Résultats (Anglais) 3:

5.3 the orientation of the rotor axis, wind turbines are further classified by the orientation of the axis of the rotor with respect to the ground (horizontal axis wind turbine (hawt) and vertical axis wind turbine (vawt; figures 1.7 and 2.6). the rotor system is hawts need to be kept in the flow of the wind to capture the maximum energy.the rotation of the rotor about the tower axis between gold, yaw, is accomplished by a tail on upwind units (small wind turbines, up to 10 kw, although there have been left behind on some 50 kw units), and we downwind coning units (figure 5.7), or by a motor (electric or wind [fan tail rotor) to drive the unit around the yaw axis. coning is where the blades are at an angle from the plane of rotation.vawts have the advantage of accepting the wind from any direction. however, the darrieus wind turbine is not reliably self starting, as the blades have to be moving faster than the wind to generate power. so the induction motor / generator or a motor is used for start up to get the blades moving fast enough that they generate positive power. the giromill (figure 5).(8) may have their blades, which can change the angle on the rotational cycle, so it can be self starting. another advantage of vawts is the speed increaser and generator can be at ground level. there are two disadvantages: the rotor is closer to the ground, and there is no change of power on every revolution of the rotor. "