There are many ways to generate electricity! The most common is thermal power generation, which requires a large amount of coal and then uses the released energy to push the generator rotor to rotate, thereby generating electricity. will produce a large amount of thick smoke, which is harmful to the environment. Environmental pollution is very significant; There is also hydropower, which mainly uses the potential energy of water to drive the generator to produce electricity. the environment and can also play a role in regulating the environment; and there is the nuclear power plant, which uses this method. It is very efficient and generates a lot of electricity, but nuclear radiation is very dangerous and very harmful to the human body; there is also wind energy production. We often see many rotating wind turbines, which usesnt wind energy to produce electricity, and it does not harm pollution, generally thermal power generation is used in the south; In addition, electricity for everyday cars is obtained through the friction of tires. In fact, there are many energy sources that can be used to produce electricity. It exists objectively, but no one would benefit from it before. It's artificial. . . Electricity is transformed into energy and was invented by man. There are many ways to generate electricity. The most common is thermal power generation, which requires a large amount of coal, and then the released energy is used to push the generator rotor! rotate, thus producing electricity. This type of method will produce a lot of thick smoke, which will cause great pollution to the environment; there is also hydroelectricity, which mainly uses pot energywater to run the generator and produce electricity. This will pollute the environment very little and can also play a role in regulating the environment. There are also nuclear power plants, which are very efficient and produce a lot of electricity, but nuclear radiation is very dangerous and very harmful to the human body; there is also wind power generation, we often see many rotating windmills, that is, there is no pollution to the environment when using the wind power wind energy to produce electricity. Generally, thermal power is used in the north and hydropower is used. in the south, electricity for daily cars is obtained through the friction of tires. In fact, there are many energy sources that can be used to produce electricity. The simplest answer to energy conversion ist the following: where does the electricity produced by the power plant come from? Electricity comes from the power plant. Where does the electricity for the power plant come from? the power plant. Where does the generator's electricity come from? Electricity from a generator is generated by the principle of electromagnetic induction. A generator is a mechanical device that converts other forms of energy into electrical energy. Electric power is one of the most important energy sources in modern society. A generator is a mechanical device that converts other forms of energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or other electrical machine. It converts energy generated by water flow, air flow, fuel combustion or nuclear power. fission into mechanical energy then transmits it to the generator. Converted into electrical energy by the generator. The generators aresilver used in industrial and agricultural production, national defense, science and technology and daily life. There are many forms of generators, but their operating principles are all based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is: using suitable magnetic and conductive materials to form magnetic circuits and circuits that conduct electromagnetic induction among themselves to generate electromagnetic energy and achieve the conversion goal of energy. The classification of generators can be summarized as follows: Generator { DC generator, alternator { Synchronous generator, asynchronous generator (rarely used) AlternatorIt can also be divided into single-phase generators and three-phase generators. 2. Structure and principle of operation Generators are generally composeddated from a stator, rotor, end cover, bearings and other components. The stator consists of the stator core, wire windings, machine base and other structural parts that secure these parts. The rotor is composed of rotor core winding (or magnetic pole, magnetic choke), retaining ring, center ring, slip ring, fan and a rotating shaft. The stator and rotor of the generator are connected and assembled by the bearings and end covers, so that the rotor can rotate in the stator and carry out the cutting movement of the magnetic lines of force, thereby generating induced electric potential, which is evacuated. across the terminals and connected in the circuit to generate current. Electric current refers to the directional movement of electric charge. The size of the current is called the intensity of the current (called current, symbol I), which refers to the amount of charge passing through a certain section of the wire per unit of time. The amount of electricity passing through one coulomb per second is called. an "ampere" (A). The ampere is the base unit for all electrical properties in the SI system of units. In addition to A, commonly used units are milliamps (mA) and microamps (μA) 1A=1000mA 1mA=1000μA 1KA=1000A Microscopic expression of current [Edit this paragraph] I = nes. n in the formula represents the number of free charges per unit volume, e is the electric charge of the electron, s is the cross-sectional area of the conductor, and v is the rate of directional movement of the free electrons. The basic calculation formula for current [edit this paragraph] I=q/t=U/R=P/U The direction of current [edit this paragraph] It is physically specified that the direction of current is the direction of directional movement of the positive charges or the direction of the negative charges. Lhas the opposite direction of movement. Reasons for current formation [Edit this paragraph] Voltage is the cause of directional movement of charges in the circuit to form current Conditions for current generation [Edit this paragraph] 1. There must be charges that can move freely. 2. There is voltage at both ends of the conductor (to achieve closed-loop DC, a power supply must be available). The unit of current - ampere [edit this paragraph] The unit of current is the ampere, abbreviated to ampere, and its symbol is: A. Its definition is: The ampere is a constant current if it is maintained in two infinite lengths 1 meter apart. in a vacuum, and the circle In a straight parallel wire of negligible section, the force generated between the two wires is equal to 2×10-7 Newtons per meter of length. This definition was approved by the 9th International Conference on Weights and Measures in 1948. WhenAt the 11th International Conference on Weights and Measures in 1960, the ampere was officially adopted as one of the basic units of the International System of Units. Current measurement - ammeter [edit this paragraph] What are the requirements when using an ammeter 1. The symbol of the ammeter: -A - How to use an ammeter 1. The ammeter must be connected in series in the circuit 2. The positive and negative terminals must be connected correctly: the current enters through the positive terminal and exits through the negative terminal 3. The measured current must not exceed the range of the ammeter 4. It is absolutely forbidden to directly connect the ammeter. to both poles of the power supply without passing through the electrical device. 5. Confirm the currently used range of the ammeter 6. Confirm the current value represented by each large grid and each small grid. Test touch first and solve. the problem first if therehas a problem. (1) The pointer does not deviate, (2) The pointer If the needle deviates too much, the ammeter will explode. (3) The deflection of the pointer is very small, (4) the pointer deviates in the opposite direction The three major effects of electric current [edit this paragraph] 1 Thermal effect 2 Magnetic effect 3 Chemical effect Electricity is transformed outside China <. /p>< h3>What principle does coal use to produce electricity?
1. The fuel of thermal power plants is coal, including various coals such as thermal coal, coke, lignite, etc. The fuel for nuclear power plants is the radioactive element uranium.
2. The cost of thermal power plants mainly corresponds to the cost of coal. With the current increase in domestic prices, the price of good thermal coal is basically around 500 yuan/ton, and the cost is relatively high. , while the cost of nuclear power plants The cost is uranium, which is much more expensive than coal, but it can work continuously for more than a year after being recharged once, so it is simpler than coal.
3. The pollution and fire points generated are mainly SO2, CO2 and ashes after the combustion of the coal. It has a certain impact on the air, while nuclear energy mainly concerns radiation and the impact on water temperature after the cooling water is released into the sea. In comparison, energy nuclear power is relatively clean, at least it is invisible to the naked eye.
4. In terms of scale, general nuclear units like Qinshan Phase 1 are 1*300 MW, Phase 2 is 2*600 MW, Daya Bay units are 2*800 MW and Sanmen Nuclear Power Plant will begin construction. in 2009 This is a third generation nuclear reactor planned by the American company Westinghouse with a capacity of 6*1000 MW.It is expected to be the most advanced and largest unit in China.
5. As for the energy change process, thermal energy uses water vapor generated by burning coal to drive the turbine to operate. It is a process of chemical energy from coal - mechanical energy from turbine - electrical. energy. Nuclear energy is a process of chemical energy - mechanical energy - electrical energy from nuclear raw materials. The principle is the same, only the fuel is different. If you still have questions, you can send me a message on the site.
Coal uses the principle of energy conversion to produce electricity.
When fuel is burned, it heats water to generate steam, which converts the chemical energy of the fuel into thermal energy. The steam pressure causes the steam turbine to rotate and the thermal energy is converted intomechanical energy. The steam turbine then turns the generator, converting mechanical energy into electrical energy.
Coal has a wide range of uses, which can be summarized into three main uses depending on its purpose: thermal coal, coking coal and coal for the chemical industry, including coal gasification, low temperature carbonization coal, and hydrogenation coal. Liquefied coal, etc.
(1) Coal for power generation: More than one-third of China's coal is used for power generation, and the average consumption of coal for power generation is approximately 370 g/(kW·h) of standard coal. Power plants use the calorific value of coal to convert thermal energy into electrical energy.
(2) Coal consumption for steam locomotives: represents approximately 3% of coal consumptionelectric. The average coal consumption index of steam locomotive boilers is approximately 100 kg/(10,000 tonnes·km).
(3) Coal for construction materials: It accounts for more than 13% of coal energy, with cement using the largest amount of coal, followed by glass, bricks, tiles, etc.
(4) Coal for general industrial boilers: in addition to thermal power plants and large heating boilers, general enterprises and heatingThere are many types of industrial boilers used, and the quantity is large and scattered. Coal consumption represents approximately 26% of thermal coal consumption.
(5) Domestic Coal: The amount of domestic coal is also large, accounting for about 23% of the coal used as fuel.
(6) Thermal coal for metallurgy: Thermal coal for metallurgy is mainly coalanthracite for sintering and injection into blast furnaces, and its consumption is less than 1% of the amount of thermal coal.
Detailed information
Although China is relatively rich in coal resources, its coking coal reserves are still relatively small, accounting for only 27 .65% of coking coal reserves. China's total coal reserves.
Coking coal includes gaseous coal (accounting for 13.75%), fatty coal (accounting for 3.553%), main coking coal (accounting for 5.26%), lean coal (accounting for 4.01%) and others unclassified. coals (representing 0.55%).
Non-coking coal includes anthracite coal (accounting for 10.93%), poor coal (accounting for 5.55%), low-caking coal (accounting for 1.74%), non-coking coal (accounting for 1.74%), coke (representing 13.8%). and long-flame coal (representing 13.8%), lignite (representingant 12.76%), natural coke (accounting for 0.3%), unclassified coal (accounting for 13.80%) and unclearly branded coal (accounting for 1.06%).
The main use of coking coal is the manufacture of coke. Coke is melted from coking coal or mixed coal at high temperatures. Typically, about 1.3 tons of coking coal can be used to make one ton of coke. Coke is mainly used in steel manufacturing and is the main raw material for the steel industry and other industries. It is known as the “staple” of the steel industry.
Baidu-Coal Encyclopedia (definition of the word)