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This paper analyzes the reasons of abundant hydropower resources in Three Gorges hydropower station and Longtan Hydropower Station
The first is the large terrain drop
Second, there is plenty of water
After the completion of the Three Gorges hydropower station, the installed capacity will reach 18.2 million kilowatts. What is the ultimate source of this power
It comes from the gravitational potential energy of water brought by the water level of more than 170 meters. Further speaking, these water will not go up to more than 170 meters by themselves. They go up through precipitation, and the precipitation water eventually comes from various evaporation, and the energy required for evaporation comes from the sun, so the most fundamental source of these electric energy is the energy released by nuclear fusion carried out by the sun
1. If the water flow of the waterfall is 7.5 M & sup3 / s, the water will enter the hydro generator after falling 30 m, and 80% of the water flow energy will be converted into electric energy, what is the power generation
2. The iron ball and aluminum ball with the same volume are placed on the horizontal table, the iron ball is still, and the aluminum ball is moving. Why can't the mechanical energy of the two balls be compared?
Question 1: according to the law of conservation of energy, the energy of water is composed of potential energy (EP) and kinetic energy (EK). When the water flows from high to low into the turbine, the potential energy and kinetic energy of the water flow are transformed into the mechanical energy of the turbine. The rotation of the turbine drives the rotation of the hydro generator, which converts the mechanical energy of the turbine into electrical energy, Efficiency (b) can not reach 100%, and some energy loss will inevitably occur. Water energy can be calculated by Bernoulli equation. If you can't understand, you can find me alone for the specific calculation process. Now I directly give the calculation formula: generator power P = 9.81qhb = 9.81x7.5x30x0.8 = 1766kw
The kinetic energy depends on the mass and velocity of the object, while the gravitational potential energy depends on the mass and height of the object. On the same horizontal plane, the height of the iron ball and the aluminum ball is equal. Although the volume is equal, the mass of the two balls is not equal because of their different densities, Therefore, the gravitational potential energy of the iron ball is greater than that of the aluminum ball. However, the kinetic energy of the two can not be determined (you can see by listing the formula), so the mechanical energy of the two can not be compared
What are the types of small turbine? How to calculate the power of turbine?
1. How to choose the type?
2. How to calculate the power?
There are mixed flow type, bucket type, oblique strike type, double-click type. Axial flow type can also be used in low head and large flow. The simple calculation is as follows: flow x drop x gravity acceleration X efficiency
Discharge = m3 / s drop = m acceleration of gravity = constant = 9.8 efficiency is generally taken as 0.7
RELATED INFORMATIONS
- 1. What is the generating power of the hydro generator? (g = 10N / kg)
- 2. The strong wind speed of a certain place is 14m / s, the air density is 1.3kg/m ^ 3, and the wind with cross-sectional area of 400m ^ 2 makes the wind turbine rotate, If 20% of its kinetic energy is converted into electric energy, how many watts of power is generated? (the air to the wind blade in T seconds is contained in a cylinder with s as the bottom area and L = VT in length)
- 3. The wind speed of strong wind in a certain place is 20m / s, the air density is p = 1.3kg/m3, and the effective wind area of a wind turbine is s = 20m2 After the wind turbine, the wind speed becomes 12m / s, and the efficiency of the wind turbine is 80%, then what is the electric power of the wind turbine
- 4. Why does wind energy come from solar energy? I wish I were more careful
- 5. 1. Solar energy, wind energy, tidal energy, nuclear energy, which is non renewable energy?
- 6. From the point of view of energy conversion, this paper explains why the sound is bigger than the sound is smaller and consumes more electric energy when the TV is working at the same time Such as the title
- 7. When the electric current passes through the electric bulb, the filament becomes hot and emits light. At this time, the electric energy is converted into () energy and () energy
- 8. What is energy, such as light energy, electric energy, etc Is energy matter
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- 10. Since pure resistance refers to the resistance that converts electric energy into heat energy, why does the bulb belong to pure resistance? Isn't it also converted into light energy?
- 11. Wind power is the same as hydroelectric power generation. It generates electricity by rotation. Now how does electricity have to rush to the point?
- 12. Are hydropower and wind power both mechanical energy to electrical energy?
- 13. What does thermal power plant use to generate electricity? A potential energy B electric energy C chemical energy D light energy
- 14. How to make three blades of windmill model I plan to make a windmill model. Now, the blade is cut according to the size, but how can the blade of the plane be fixed?
- 15. Energy conversion windmill magnifier! What is the energy conversion of windmill and why? What is the energy conversion of magnifying glass and why?
- 16. What's the relationship between the battery voltage of fruit? I remember watching a foreigner's video before. It seems that if you cut a fruit in half and connect these parts in series, it will double. Is it related to the number of batteries? By the way, what will happen if you connect the positive and negative stages directly to short circuit the battery of the fruit? Juice splashing?
- 17. If you want to get higher voltage, you can connect multiple fruit batteries in series. Do you have to be the same fruit? Can you connect different fruit batteries in series? What's more, we need to write the experiment report about fruit battery. How should we write it? We haven't learned those formulas yet.
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- 20. How does electric energy transform into other forms of energy From the micro point of view, how does electric energy transform into other forms of energy? Yes. It's electronic or something