(1) The current passing through the wire is: I＝
| P0 |
| U |
| 300×103 |
| 10×103 |
Power lost on the wire: P loss=I2R=302×10=9×103W
The ratio of the lost power to the transmitted power
| P |
| P0 |
| 9×103 |
| 300×103 |
(2) The wind flows vertically to the wind turbine, providing the maximum wind energy power. The mass of gas flowing vertically to the blade rotation area per unit time is ρvS, S=πr2,
The maximum power of wind energy can be expressed as Pm=
| 1 |
| 2 |
| 1 |
| 2 |
(3) To increase the wind turbine unit The wind energy received over time can be obtained by: increasing the area swept by the rotation of the wind turbine blades or adjusting the direction of the wind turbine.
Answer: (1) The ratio of the power lost on the conductor to the transmitted power is 0.03;
(2) The maximum wind energy flowing to the wind turbine per unit time is
| 1 |
| 2 |
(3) Increase the area swept by the rotation of the wind turbine blades or adjust the direction of the wind turbine.