The greatest advantage of using ultra-supercritical is that it saves energy. Compared with the 660 MW supercritical unit, it can save about 5 to 7 grams of coal per kilowatt hour. However, if an economic comparison is used, the investment for each machine will increase by about 150 million yuan, so an economic comparison cannot be made. At present, domestic ultra-supercritical units of 600 MW and 660 MW are already in operation, but the so-called ultra-supercritical parameters have different values, including 600/600℃, 566/600℃, 600/566℃ and 580/580℃. Wait, there are different opinions on which parameters achieve the best investment performance ratio.
Generators are mechanical devices that convert other forms of energy into electrical energy. They are driven by water turbines,steam turbines, diesel engines or other electrical machines to convert water flow, air flow. , fuel combustion or atomic nuclei The energy produced by fission is converted into mechanical energy and transmitted to the generator, which is then converted into electrical energy. Generators are widely used in industrial and agricultural production, national defense, science and technology and daily life.
Generators come in many forms, 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 ofenergy.
June 11, 2022
The concept of ultra-supercritical power generation is popular.
The capital market is a place that generates new concepts. Recently, the concept of ultra-supercritical power generation has continued to be popular in the A stock market. The leading stock Huaxi Energy has reached 7 consecutive daily limits.
At a press conference on “China in these ten years” on Monday, Minister of Science and Technology Wang Zhigang, mentioned "high-efficiency ultra-supercritical power generation technology" several times.
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High-efficiency ultra-supercritical power generation technology high efficiency is one of the main technologies for thermal energy conservation and emission reduction
China's energy consumption is dominated by coal. reachedre the dual carbon targets, it is necessary to improve the level of clean and efficient use of coal.
Therefore, high-efficiency ultra-supercritical power generation technology will play a huge role.
Ultra-supercritical refers to the state of the medium.
Criticality refers to the minimum condition for transforming a state or physical quantity into another state or physical quantity.
For thermal power generation, a simple understanding is to use coal to "burn water" to turn water into water vapor with a certain pressure and temperature.
In this process, the water vapor drives the rotation of the steam turbine, thereby driving the generator to produce electricity.
According to the principle of thermodynamics, the higher the pressure and temperature parameters of the steam, the mores the efficiency of electricity production will be high.
So thermal power plants have existed for over 100 years. With the advancement of steel materials, the steam pressure and temperature of thermal power plants continued to increase.
The efficiency of power plants increases accordingly.
In the field of coal-fired power generation, at a pressure of 22.115 MPa and a temperature of 374.15°C, the water vapor will be compressed up to 'so that its density is the same as that of liquid water. This condition is called the water criticality parameter.
Parameters higher than this are called supercritical parameters.
Typical value is 24 MPa/540 ℃.
Under supercritical pressure parameters, if the steam temperature is not lower than 580°C, it is called ultra-supercritical.
The typical value is 26 MPa/600℃.
The power generation technology that uses this steam to operate the steam turbine units is ultra-supercritical coal-fired power generation technology.
In this context, A-share ultra-supercritical power generation concept stocks continue to be popular.
West China Energy, as the leading stock, has closed 7 consecutive boards.
The latest price is 4.22 yuan per share.
There are two reasons why the market recognizes ultra-supercritical power generation. One is the promotion of national policies and the other is relatively mature technology.
In the context of dual carbon, high-efficiency ultra-supercritical power generation technology is considered a safer, more environmentally friendly means of generating electricity. the environment and pmore energy efficient.
Of course, industrial leadership and cutting-edge technology do not mean that just any position can be involved.
When we are favored by the capital market, we should also pay attention to reasonable prices.