The water-coal conversion coefficient is in fact the ratio of coal to water consumed by a power plant to emit the same electrical power. Therefore, the higher the permitted water consumption, the lower the water consumption. -coal conversion coefficient.
The output formula of hydropower is:
P=9.81ηHQ
P: Output unit: kW (kilowatt) Power transmitted from the end of the unit.
H: Unit of height: m (meter) The effective head acting on the turbine, which is equal to the difference between the reservoir water level and the downstream water level ( that is: gross head) minus the pressure loss of the water diversion part, the pressure loss △h, according to experience, it is generally 3% to 10% of Hg (gross height), and the smaller value is used for shorter water distribution channels.
Q: Flow unit: m3/s (cubic meter/second) indicated flow rate of the turbine in the hydroelectric power station.
η: The efficiency of the hydraulic generation unit, including turbine efficiency and generator efficiency η, is not only related to the turbine type and parameters and generator, but also changes with. changes in the operating conditions of the unit. This is not a fixed value.
Detailed information:
(1) Providing electrical energy. This is the main task of hydroelectric power plants.
(2) Peak regulation. The main hydroelectric power station with regulating capacity acts as the main hydroelectric power station.
(3) FM. Large-scale units with tanks and strong adjustment capabilities are in charge. The frequency in China is 50 ± 0.2 Hz.
(4) Phase modulation. It has the ability to operate in phase modulation and can participate in balancing the reactive power of the system according to the requirements of the electrical network.
(5) As an emergency backup. Since the hydroelectric production unit has the characteristic of being quickly started andconnected to the grid for electricity generation, when a sudden accident occurs in the power system, there is an urgent need to replenish the electricity and the hydroelectric power station units are often used. as emergency rescue units.
Baidu Encyclopedia-Water Gas
Baidu Encyclopedia-Hydroelectric Power Plant
0.6 kg/kWh
Thirty The power generation water consumption rate of the 10,000 kilowatt unit parameter shall refer to the water consumption rate of the 300,000 kilowatt unit of the thermal power plant, to excluding hydraulic ash disposal, auxiliary equipment cooling water, coal yard water, domestic water, etc. but refers to the unit's circulation cooling system. Normal water replenishment and boiler water replenishment.
Therefore, according to the requirements of 14.1.4 of “Technical Regulation DL 5000-2000 for the design of thermal power plants”, the rate of water consumption for electricity production should not exceed the design regulations. However, in the actual production process, depending on various production management factors, the water consumption rate for power generation generally changes to first-class thermal power generation.Work hard on the site management indicators. According to relevant reports, the water consumption rate of the best water-saving generator per unit of power generation can reach less than 3.6 kg/kWh. Of course, this is related to the unit type.
Detailed Information
Shanghai Heavy Machinery Factory Co., Ltd. and others are responsible for high and medium pressure cylinder trial production, forming fusion, casting, heat treatment, welding repair, etc. Production processcomplete, the product was used in a 600 MW steam turbine.
After many failures in the development of high-voltage rotors, we finally solved the problem of smelting high-alloy low-silicon and aluminum steels, developed under-slag remelting technology Nitrogen protected electric and successfully tested- produces one high voltage rotor, two rotors for the product in production. Austenitic stainless steel pipe is developed by the special steel branch of Baoshan Iron and Steel Co., Ltd. and participated by Shanghai Boiler Works Co., Ltd. The metallurgical quality of the domestic pipe is equivalent to the level of imported materials, and the durable strength can reach 99 MPa at a high temperature of 650°C.
High temperature and high strength materials for blades and bolts developed by Shanghai Steam Turbine Co., Ltd. and others were industrialized, with a prannual production of approximately 600 tonnes. Generators installed with this component in power plants such as Huangdao in Shandong and Suxian in Anhui have been put into normal operation. The high-strength screw material for turbine generators developed by Shanghai Xinmin Heavy Forging Co., Ltd. and others has been used successfully in 1000 MW generators.
According to expert estimates, once the project is completed, the cost of ultra-supercritical units could be reduced by half. The outline of China's "Eleventh Five-Year Plan" proposes "to optimize the development of thermal power by emphasizing large-scale, high-efficiency and environmentally friendly units, and to build large ultra-supercritical power plants and large power plants” large-scale air-cooled power plants. The “National Scientific Development Plan"Clean and Efficient Development and Utilization". Coal, Liquefaction and Polygeneration".
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