The maximum theoretical limit of wind turbine efficiency in converting wind energy into electrical energy is 59.3%.
Wind energy efficiency refers to the proportion of wind energy converted into electrical energy. According to theoretical calculations, the maximum theoretical limit of a wind turbine converting wind energy into electrical energy is 59.3%. This value is called the Betz limit and represents the maximum efficiency of wind energy conversion under ideal conditions. However, in practice, the efficiency of wind energy is often lower than the theoretical limit. The efficiency of real wind turbines is affected by many factors, including wind speed and direction, wind turbine design, generator efficiency, etc. Currently, the average efficiency of commercially operated wind turbines is around 30 to 40%.
Quantity calculation formulairradiation and theoretical energy production
For a 1.5 MW wind turbine, the generator spins approximately 1,800 times per minute and generates 1,500 kilowatt hours of electricity per hour. . The turbine It rotates approximately 18 times per minute. This is directly related to the unit's ability.
Generally speaking, level 3 winds are valuable. However, from an economic and reasonable point of view, wind speeds above 4 meters per second are suitable for electricity generation.
According to measurements, a 55 kilowatt wind turbine has an output power of 55 kilowatts when the wind speed is 9.5 meters per second; when the wind speed is 8 meters per second, the power is 38 kilowatts; wind speed When the wind speed is 6 meters per second, it is only 16 kilowatts; when the wind speed is 5 meters per second, it is only 9.5 kilowatts. We can see that the more the foThe stronger the wind, the greater the economic benefits.
Detailed information
A wind turbine is an electrical device that converts wind energy into mechanical work. Mechanical work causes the rotor to rotate and ultimately produces reciprocating output. current. Wind turbines generally consist of components such as a wind wheel, a generator (including devices), a steering (tail), a tower, a speed-limiting safety mechanism, and an energy storage device.
The operating principle of a wind turbine is relatively simple. The wind wheel rotates under the influence of the wind. It converts the kinetic energy of the wind into the mechanical energy of the wind wheel shaft. driving the wind wheel shaft to produce electricity. Generally speaking, wind energy is also solar energy, so we can also say that a wind turbine is athermal energy generator that uses the sun as the heat source and the atmosphere as the working fluid.
For many centuries, wind turbines, like hydraulic machines, have played an important role in the development of productivity as a source of energy to replace human and animal energy. The widespread application of electromechanical power in modern times and the discovery of oil deposits in the Middle East in the 1950s slowed the development of wind turbines.
In the early 1970s, due to the “oil crisis”, energy shortages appeared. People have become aware of the instability and limitations of conventional fossil energy supplies, so the search for clean and renewable energy has become a key issue in the modern economy. world. an important subject. As a renewable and non-polluting natural energy sourcente, wind energy has attracted attention again.
References:
After querying the State Grid, electricity production = solar radiation × total panel area × component conversion efficiency × 0.28 × system efficiency.
Theoretical annual electricity production is the estimated total electrical energy produced by a wind turbine over the course of a year using the power curve and hub height to represent the annual frequency distribution of wind speed.