The water-coal conversion coefficient is in fact the ratio of coal/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 pipes.
Q: Flow unit: m3/s (cubic metere/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 types and parameters and generator, but also changes with. changes in the operating conditions of the unit. This is not a fixed value.
Detailed information:
In the power system, power plants generally include power plants thermal power plants, hydroelectric power plants, nuclear power plants, wind farms, solar power plants, etc. In areas with low water resources, thermal power plants account for a larger proportion, while in areas with abundant water resources and a higher degree of development, hydroelectric power plants account for a larger proportion.nte. Wind farms and solar energy are new sources of energy. The main functions of hydroelectric power plants in the power system are:
(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 the reactive power balance of the system according to the requirements of the electrical network.
(5) As an emergency backup. Since the hydroelectric generation unit has the characteristic of being quickly started and connected to the grid for electricity production,When a sudden accident occurs in the power system, there is an urgent need to replenish electricity, and the hydroelectric power station units are often used. as emergency rescue units.
Baidu Encyclopedia - Water and Gas
Baidu Encyclopedia - Hydroelectric Power Plant