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 operate continuously for more than a year after being recharged once, so it is simpler than the coal.
3. The pollution and fire points generated are mainly SO2, CO2 and ashes after the combustion of the coal. It has some impact on the air, while nuclear energy is mainly about radiation and the impact on water temperature.u after the cooling water is released into the sea. In comparison, 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 pcoming 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.
Is the production of nuclear energy more or less polluting for the environment than the production of thermal energy?
Public information shows that a standard thermal power plant d 'one million kilowatts consumes around 3 million coal. per year, emitting 25,000 tons of sulfur dioxide, 15,000 tons of nitrogen oxides, 320,000 tons of dust and 6 million tons of carbon dioxide into the atmosphere. In 2013, China's installed thermal capacity was 860 million kilowatts, the equivalent of 860 million-kilowatt thermal power plants. These thermal power plants emit 21.5 million tonnes of sulfur dioxide, 12.9 million tonnes of nitrogen oxides and 275 million tonnes of nitrogen oxides. dust in the atmosphereevery year. These pollutants are released into the atmosphere and, after a series of physical and chemical changes, become the main components of PM2.5.
Nuclear energy is a clean energy source. During the electricity generation process, nuclear power does not produce sulfur dioxide, nitrogen oxides, soot or carbon dioxide. Even considering the entire energy production process, from mining to fuel and electricity production, nuclear power produces far fewer harmful gases than fossil fuels. It is also a one million kilowatt power plant. The nuclear power plant produces only 30 tons of nuclear waste per year, which can be transported with a large truck and does not emit sulfur dioxide, nitrogen oxides, dust or carbon dioxide. /p>< p>A standard thermal power plant of one million kilowatts consumes approximately 3 mbillion tons of coal per year and emits a total of 6.36 million tons of pollutants and carbon dioxide if 36 nuclear power plants are put into operation by 2016. , pollutants will be reduced every year and CO2 emissions of 216.24 million.tons (multiply 636 by 34, 34 million kilowatts are converted into 34 million kilowatts, which is equivalent to 34 million kilowatts of nuclear power plants).
How does nuclear power produce electricity?
Small
Thermal power generation will produce a large amount of sulfur dioxide and dust, which is extremely harmful to the environment. Although nuclear power generation produces radioactive waste, the amount is very small, only a few tens of kilograms per year can be purified and reused. The final waste is accumulated and placed in a permanent storage warehouse or buried thousands of meters. under terre, with almost no impact on the environment.
A method of producing electricity using thermal energy released by nuclear fission in a nuclear reactor. It is very similar to thermal power generation, except that nuclear reactors and steam generators are used to replace thermal power boilers, and nuclear fission energy is used to replace thermal power. chemistry of fossil fuels. Except for boiling water reactors, other types of power reactors heat the coolant through the reactor core, transfer the heat to the water in the steam generator, and then form steam to drive the turbogenerator. In a boiling water reactor
The coolant is heated through the reactor core and transformed into supersaturated steam with a pressure of about 70 atmospheres. Once the steam andSeparated and dried water, it directly drives the turbogenerator. /p>
Use of nuclear power generation The heat generated by the nuclear fission chain reaction of uranium fuel heats water to high temperature and high pressure, and uses the generated water to produce steam
rotate the steam turbine and drive the generator. The heat released by nuclear reactions is much greater than the energy released by burning fossil fuels (the difference is about a million times). In comparison, the volume of fuel required is much lower than that of thermal power plants. Uranium 235 used in nuclear power production is only 3% pure. 4%, and the rest is uranium 238 which cannot produce nuclear fission.
For example, a nuclear power plant uses 80 tons of nuclear fuel each year, and only 2 standard containers can transport it. If heTo be powered by coal, it would require 5.15 million tonnes and 20 tonne trucks to transport 705 cars per day. If natural gas is used, 1.43 million tons are required, which is equivalent to burning 10,000 barrels of domestic natural gas every day.