The cost of solar power generation is high, and the current highest power generation efficiency is about 21%, and the average power generation efficiency is about 15%. This type of energy production is mainly used for low-consumption electronic components. The efficiency of wind power generation is about 40-50%, and the cost is relatively low. However, it is indeed easy to damage it, because the generator is exposed to wind and sun all year round. Additionally, as the wind comes and goes, the power output of the generator changes. Additionally, electricity must be used at night, so batteries must be charged during the day to provide energy at night or to store electrical energy. As the output power of the wind turbine changes, the battery will be damaged during charging. (Different types of batteries have different charging methodsement.) Also. If your electrical devices use AC power, a DC-AC circuit board is required to discharge the battery.
What is the difference between wind energy and solar energy?
1. Wind Turbine
Wind turbines can be divided into DC generators and AC generators.
1. DC generator: A DC generator is mainly composed of a generator shell, a magnetic pole core, a magnetic field coil, an armature and a carbon brush (as shown in Figure 1 ). Working principle of power generation: When the wind rotates the armature of the generator, due to the residual magnetism in the core of the magnetic pole of the generator, the armature coil cuts off the magnetic lines of force in the magnetic field according to the principle. Electromagnetic induction, the current is generated by magnetic induction and the current is output through the carbon brush.
2. Alternateator: The alternator is mainly made of magnetic materials with several permanent magnets (called rotors) arranged alternately between the north and south poles and an armature coil made of cast silicon and wound with several sets of series. coils (called stators). Working principle of power generation: The rotor is driven by the wind to axially intersect the magnetic lines of force. The alternating magnetic poles in the stator form an alternating magnetic field in the coil core. When the rotor rotates once, the direction and size are changed. of the magnetic flux changes several times. Due to the transformation of the magnetic field, an induced current varying in magnitude and direction will be generated in the coil and delivered through the stator coil. ?
2. Solar power generation
Solar power generation methods There are two methods of solar power generation, une is the light-heat-electricity conversion method and the other is light. -Direct electricity conversion method. ?
1. The light-heat-electricity conversion method uses thermal energy generated by solar radiation to produce electricity. Generally, a solar collector converts the absorbed thermal energy into steam as the working fluid and then drives it away. a steam turbine to produce electricity. At present, it can only be used on a small scale on special occasions, and large-scale use is not economically profitable and cannot compete with ordinary thermal or nuclear power plants. ?
2. Direct light-to-electricity conversion method This method uses the photoelectric effect to directly convert solar radiation energy into electrical energy. The basic device for converting light into electricity is the cell solar. Sunlight shines on the p-n junction of the semiconductor, forming new hole-electron pairs. Under the action of the electric field of the p-n junction, holes flow from region n to region p and electrons flow from region p to region n. region. After the circuit is turned on, a current is formed. This is how photovoltaic solar cells work. Solar cells are a promising new energy source with clean, permanent energy. Three major advantages: cleanliness and flexibility.
1. (1) Advantages of wind energy: huge potential, wide distribution, regenerable and pollution-free.
(2) Disadvantages of wind energy: low density, instability, large regional differences, wide dispersion of wind energy, randomness and low energy density!
2. Wind power generation: the benefits of large-scale systemsare high reliability of the system power supply and low operation and maintenance costs. The disadvantage is the high cost of the system. .
The advantages of this small system are that it produces higher power, lower system cost and lower operation and maintenance costs.
The disadvantage is that small wind turbines have low reliability. .
..Due to the strong complementarity between solar energy and wind energy, wind and solar hybrid power generation systems compensate for the resource shortage of wind energy and independent photovoltaic systems
.
Wind engine is an energy conversion device that converts wind energy into mechanical energy.
As shown in Figure 1-4, the wind engine consists of 5 parts: ...The disadvantage is that it is difficult to start. ...The capacity of small wind turbines is not large et power generally varies from a few watts to several kilowatts. Most of them have the advantages of simple structure and easy transportation. ...In the use of wind energy, energy storage is an important issue. ...
3. The advantages of wind power generation are:
The cost of solar power generation is too high and the technological content is high. Energy production will be affected when solar energy production is affected. the weather is bad;
For wind energy production, the worse the weather, the stronger the wind and the better the electricity production.