ACTIVITY-1: ELECTRIC POWER GENERATION
Class- X
Concepts leaned from Science Text book :
Chapter 12: Electricity
Chapter 13. Magnetic Effects of Electric Current
Chapter 14: Sources of Energy
generates in Thermal and Nuclear Power Stations.
2. Introduction : Several energy sources are used for
electricity generations. Electricity is generated from
coal, oil, water, wind and solar. The gas is first converted
into the mechanical energy before it transformed into
electrical energy. The first conversion is carried out by
means of steam. Fuel is burned in a boiler and the heat
produces steam ;under pressure. The steam is allowed
through nozzles in a steam turbine. After expansion, the
steam has high speed and it mechanical energy is
transferred to turbine shaft,which is caused to rotate at
high speed. The shaft finally turns the electromagnet of
the generator and the generator changes the mechanical
energy into the Electrical energy.
3. Thermal Power Station:
Since electricity cannot be stored easily, power station
Since electricity cannot be stored easily, power station
work 24 hours a day to produce electricity on demand.
a. The coal will be dumped into mills where it is dried and
a. The coal will be dumped into mills where it is dried and
grand into fine powder.
b. It mixed with air and burn at the high temperature.
c. The boiler itself consist of a large number of tubes
b. It mixed with air and burn at the high temperature.
c. The boiler itself consist of a large number of tubes
in which water is changed to steam by the heat of the furnace.
d. The steam is further heated to a temperature of 550 degree celsius.
e. Now the steam enters a cycle where it's used and re-heated.
d. The steam is further heated to a temperature of 550 degree celsius.
e. Now the steam enters a cycle where it's used and re-heated.
The electricity produced by turbine-driven generators.
The high pressure steam drives the turbine, providing the
driving force for generator.
4. Nuclear Power Station :
The fuel for a nuclear reactor is uranium. In a nuclear
4. Nuclear Power Station :
The fuel for a nuclear reactor is uranium. In a nuclear
power station, however, the fussioning of uranium atoms
replaces the burning of coal or gas. The heat created by
splitting the U-235 atoms is then used to make steam
which spins a turbine to drive a generator, producing electricity.
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