HYDROELECTRIC POWER PLANTS By OMKAR KONDE : HYDROELECTRIC POWER PLANTS By OMKAR KONDE CONTENT : CONTENT DAM.
HOW HYDROELECTRICPOWER WORKS?
SIZE OF HYDROELECTRICPOWER STATIONS.
ADVANTAGES & DISADVANTAGES.
LOCATIONS OF HYDROELECTRICPOWER PLANTS IN INDIA. DAM : DAM Dams are structures built over rivers to stop the water flow and form a reservoir. The reservoir stores the water flowing down the river.
This water is diverted to turbines in power stations. The dams collect water during the rainy season and stores it, thus allowing for a steady flow through the turbines throughout the year.
Dams are also used for controlling floods and irrigation. The dams should be water-tight and should be able to withstand the pressure exerted by the water on it.
There are different types of dams such as arch dams, gravity dams and buttress dams. The height of water in the dam is called head race. POWER STATION : POWER STATION Power station contains a turbine coupled to a generator.
The water brought to the power station rotates the vanes of the turbine producing torque and rotation of turbine shaft.
This rotational torque is transferred to the generator and is converted into electricity. The used water is released through the tail race.
The difference between head race and tail race is called gross head and by subtracting the frictional losses we get the net head available to the turbine for generation of electricity Hydropower to Electric Power : Hydropower to Electric Power How Hydropower Works : How Hydropower Works Water from the reservoir flows due to gravity to drive the turbine.
Turbine is connected to a generator.
Power generated is transmitted over power lines. Turbine Classified : Turbine Classified POWER TRANSMISSION : POWER TRANSMISSION Is it renewable? : Is it renewable? Hydro-electric power is renewable . The Sun provides the water by evaporation from the sea and will keep on doing so
The Sun evaporates water from the sea and lakes, which forms clouds and falls as rain in the mountains, keeping the dam supplied with water. Sizes of Hydropower Plants : Sizes of Hydropower Plants Pico hydroelectric plant
Up to 10kW, remote areas away from the grid
Micro hydroelectric plant
Capacity 10kW to 300kW, usually provided power for small community or rural industry in remote areas away from the grid
Small hydroelectric plant
Capacity 300kW to 1MW
Mini hydroelectric plant
Capacity above 1MW
Medium hydroelectric plant
15 - 100 MW usually feeding a grid
Large hydroelectric plant
More than 100 MW feeding into a large electricity grid Advantages of Hydroelectric Power Plants : Advantages of Hydroelectric Power Plants Once the dam is built , the energy is virtually free
Water can be stored above the dam ready to cope with peaks in demand
much more reliable than wind , solar or wave power
No waste or pollution produced
Electricity can be generated constantly
Hydro-electric power stations can increase to full power very quickly unlike other power stations Disadvantages of Hydroelectric Power Plants : The dams are very expensive to build , however many dams are also used for flood control or irrigation , so building costs can be shared
Building a large dam will flood a very large area upstream , causing problems for animals that used to live there
Finding a suitable site can be difficult - the impact on residents and the environment may be unacceptable.
Water quality and quantity downstream can be affected, which can have an impact on plant life. Disadvantages of Hydroelectric Power Plants HYDROELECTRIC POWER PLANTS IN INDIA : HYDROELECTRIC POWER PLANTS IN INDIA THANK YOU : THANK YOU *****************************************