电力英语阅读

General requirements of constructing a thermal power plant
Coal Water Thermal and electrical load Transportation Environmental protection
Major Production Systems of Thermal Power Plant
The step-up transformers
The electricity from the generators passes
through the step-up transformers (5) to raise its voltage. Finally, it passes through the step-up substations and transmission towers (6) to the grid systems and is distributed to the consumers through the load dispatch center.
Thermal power plants are those making use of fuels like coal, petroleum and natural gas. Currently the thermal power plants of our country, which are classified into condensing power plants and thermal power plants, use coal as fuel.
The mechanical energy is changed into electrical energy
The rotor of the turbine (3) drives that of the generator (4) and electricity is produced. Thus the mechanical energy is changed into electrical energy.
10) Storage power plant
It is a pure daily-regulated pumped storage power plant. A storage power plant consists of upper reservoir, lower reservoir, water conveyance system and powerhouse complex. It utilizes pump-turbine and generator motor. During the day, it is in generating mode.
pre-reading questions
I. What is the feature of electricity? Can it be stored? Electricity (AC) only can be used while it is generated. If all users turned off the switches, the generators would not give the output. Electricity (AC) can not be stored for later use. II.What is the quality of electricity? The quality of electricity has two standards: Voltage and Cycle
4) The geothermal power plant
It extracts the hot water from underground.The water is de-pressurized through an expansion vessel and vaporized into pressurized steam, which turns the turbine. It drives the alternator to generate electricity.
1) The thermal power plant
The plants utilizing the chemical energy stored in fuels, like coal, oil, natural gas, etc. are called thermal power plants.
The heat energy is changed into mechanical energy
The steam that blows to the steam turbine turns its rotor. The heat energy of the steam is changed into mechanical energy.
A Hydropower Pl百度文库nt
3) The wind power station
It utilizes wind power to make rotating windmills drive the alternators to produce electric power. Please look at the wind power station
How does coal turn into electricity?
The process of electricity generation is also the process of energy transformation.
The chemical energy is converted into heat energy.
7) The nuclear power plant
It utilizes the heat developed from an atomic reactor to heat up the medium and make it produce high-pressure steam. The steam thrusts the steam turbine rotor, which drives the alternator to generate electricity. Please look at the future power plant
8) OTEC
Another more promising technology, known as ocean thermal energy conversion (OTEC), makes use of the temperature differential between the warm surface waters of the oceans, heated by solar radiation, and the deeper cold waters to generate power in a conventional heat engine.
2)The hydropower station
It utilizes the potential energy of water-level difference between the upper and lower reaches of dam to give an impulse to the hydraulic turbine runners (rotor) which drive the electrical generators to produce electricity.
General Introduction of Power Generation
Warming-up Questions
•Plant / drum/ bearing/ economizer, are you familiar with these words? •As a student of a university of electric power, do you think it is necessary to learn something about power plants and power production? •Have you ever been to a power plant? •In your mind, how electricity is produced?
The burning of fuels (1) in the furnace of a boiler (2) produces heat, in turn, heats the water in the boiler and converts it into hightemperature and high-pressure steam. Thus the chemical energy in fuels is converted into heat energy.
Ways of producing electrical energy
the thermal power plant the hydropower station the wind power plant the geothermal power plant the tidal power station solar-source generation the nuclear power plant ocean thermal energy conversion magneto-hydrodynamic power generator storage power plant
5) The tidal power station
It utilizes the ebb and flow of the tide to thrust the reversible water turbine and it drives the alternator to generate electricity.
Major Features of Thermal Power Plant
the plot is flexible the investment is less compared with hydraulic one the coal is the fuel the cost is more air and environment pollution
6) Solar-source generation
It utilizes the light of the sun to produce electric current through silicon cells. And it utilizes the heat of the sun to power small irrigation pumps in remote areas and underdeveloped regions of the world where fuel sources are unreliable. Please look at the solar power plant
9) MHD System
Magneto-hydrodynamic power generator is any of a class of devices that generate electric current by means of the interaction of an electrically conducting fluid and a magnetic field.