3. Introduction of Steam Power plant
The fact that thermal energy is the major source of
power generation itself shows the importance of thermal
power generation in India.
In steam power plants, the heat of combustion of
fossil fuels (coal, oil or gas) is utilized by the boiler to raise
steam at high pressure and temperature
The steam so produced is used in driving the steam
turbines or sometimes steam engines coupled to generators
and thus in generating electrical energy.
6. Design of Steam power plant
Reliability
Minimum capital cost
Less space is required in comparison with that for
hydroelectric plants.
Merits
Fuel used in cheaper
Minimum operating and maintenance
Demerits
High maintenance and operating costs.
Pollution of atmosphere due to fumes and residues from
pulverized fuels.
7. Introduction
In hydro- electric plants energy of water is utilized
to move the turbines which in turn the electric generators.
The energy of water utilized for power generation
may be kinetic or potential.
First hydro- electric station was probably started in
America in 1882 and there after development took place
very rapidly.
In India the first hydro-electric development of 4.5
MW capacity named as Sivasamudram scheme in Mysore
was commissioned in 1902.
9. Working of hydro-electric power plant
An artificial storage reservoir is formed by constructing a dam
across a river (or lake) and a pressure tunnel is taken off from the
reservoir to the valve house at the start of the penstock
The valve house contains main sluice valves for controlling
water flow to the power station and automatic isolating valves for
cutting off water supply in case the penstock bursts.
The water turbine converts hydraulic energy into mechanical
energy
10.
11. Selection of site for a hydro- electric power plant:
Availability of water
Water storage
Water head
Accessibility of the site
Distance from load centre
Type of the land of site.
12. Advantages and disadvantages of hydro-electric plants
Advantages:
No fuel charges
An hydro electric plant is highly reliable
Maintenance and operation charges are very
low
Disadvantages:
The initial cost of the plant is very high
It takes considerable long time for the
erection of such plants.
13. Conclusion:
The modern society is so much dependent upon the
usefulness of electrical energy and it has become the part
and parcel of our life.
Electricity generation and transmission progresses in
the country are very inefficient in comparison with those
of some advanced countries.