Middle school physics questions about the Three Gorges Dam!

Introduction Middle School Physics Questions on Three Gorges Dam 1. 5*10^7*1000*10=5*10^11 Newtons 2. Accumulate water to a certain height and use water pressure .

Middle school physics questions about the Three Gorges Dam!

1. 5*10^7*1000*10 = 5*10^11 Newtons

2. Accumulate water to a certain height and use the water pressure to rush into the turbine and drive it. the turbine. The rotation of the turbine causes the generator to rotate, thus generating electricity.

3. 1.0*10^3*10*175=1750000Pa

4. 8.5×10^5*1.0*10^3*10*175/3.6*10^6. /1000*40%≈165 kWh/min

The Three Gorges Dam discharges water from the 3 holes if the water spray pressure is high, can it be reused to produce water 'electricity ?

The dam generally does not eject water. Water passes through the turbine tunnel to drive the turbogenerator to produce electricity. Only when there is an emergency water release during a flood are the gates opened to release the water. The water spray you see on TV doesn't happen every day. If water is released like this every day, it is a wasteof hydraulic energy. .

How does the Three Gorges Dam generator produce electricity?

The Three Gorges Dam releases water from three holes. The high pressure of water spray can theoretically be used for secondary purposes to generate electricity, but in practice it is impossible to build a production unit and produce electricity. produce electricity.

The units of the Three Gorges hydroelectric power station are located behind the dam. In total, 32 hydroelectric units of 700,000 kilowatts are installed, including 14 on the left bank, 12 on the right bank. banks, 6 underground and 2 5 10,000 kilowatt power supply units with a total installed capacity of 22.5 million kilowatts.

Much more than the Itaipu hydroelectric plant in Brazil, the second largest in the world. The initial plan for the Three Gorges Power Station is for 26 units of 700,000 kilowatts, which means an installed capacity of 18.2 million kilowatts and an annual electricity production of 84.7 billion kWh.

Detailed information:

The environmental impact of the Three Gorges Project comes from pollution of the reservoir. Sewage and household waste dumped by cities and tourists on both sides of the Three Gorges are directly discharged into the Yangtze River without treatment.

After water is retained, due to static water flow, pollutants cannot flow out in time and accumulate in the tank. This has caused deterioration of water quality and floating waste, and can cause infections. Some cities already used other water sources to collect domestic water, while large numbers of immigrants reclaimed wasteland.

Baidu Encyclopedia - Three Gorges Hydroelectric Power Plant

You want to calculate the optimal speed of the generator of the Three Gorges Dam

The generator of the Three Gorges Dam Gorges uses electricity. Generates electricity by magnetic induction.

The Three Gorges Hydroelectric Power Station has installed 32 Francis turbine generator sets with a single capacity of 700,000 kilowatts (including 6 hydraulic generator sets in the underground plant), plus two 50 kW hydroelectric generator sets. 000 kilowatts in total installed. With a capacity of 22.5 million kilowatts and an annual electricity production of 100 billion kWh, it is the world's largest large hydroelectric power station.

We know that when wires intersect magnetic lines of force, they can generate an induced electromotive force. When wires are connected in a closed loop, current flows through them. convert me energycanic in electrical energy. In the Three Gorges Dam generator, the iron core is connected to the turbine and rotates, called rotor. The coil is fixed and is called the stator. In a Francis turbine, water flows radially through the water guiding mechanism through the guiding effect of the volute, converting the kinetic energy of the liquid into static pressure energy, and then converts the energy of static pressure into kinetic energy of the rotor via the blades. The runner passes through the main shaft and generator. The rotor coupling causes the rotor to rotate and cut off the magnetic coil of the generator stator. It uses the principle of electromagnetic induction to generate high voltage electricity in the generator coil. is then amplified by the transformer and sent to the power grid via the transmission line. The water flow eventually flows out of the rotor wheel.

The Three Gorges Dam does not measures 170 meters high, only about 130 meters, and 175 meters corresponds to the altitude. The water height (the difference in water level between the dam and the dam) is approximately 100 meters (during the rainy season). There is no point in calculating the optimal rotation speed of the generator, because as long as it is a generator for the power grid, the rotation speed is fixed, and one revolution will not change. No more, not even one turn less (except for wind power, which is a DC permanent magnet generator). The Three Gorges Generator is the largest hydrogenerator in the world, with a power of 700,000 kilowatts and a rotation speed of 75 rpm (because the generator has 40 pairs of magnetic poles, or 80 poles. The nominal production voltage electricity is 20). kV, the rated current is 22,453 amps, 75. The rotation speed cannot be changed in any way, otherwise you will not be able to access the Internet.

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