Hydropower (2).pptx

By nurulutar | Updated: April 30, 2019, 8:13 a.m.

Slideshow Video

SHARE THE AWESOMENESS

pptx2powtoon

Education

create your own animated videos for free

_abc cc

* Powtoon is not liable for any 3rd party content used. It is the responsibility of each user to comply with 3rd party copyright laws.

Embed code

Select a size, the embed code changes based on your selection.

_abc Powtoon Transcript

Hydropower
Hi! I am Ms Nurul
Today we are going to learn about 
Energy is the ability to do work. 
Energy
In this sense, examples of work include moving something, lifting something, warming something, or lighting something.
Different form of energy
3
1
2
4
Chemical Energy
Potential Energy
Kinetic Energy
Thermal Energy
Energy can be converted from one form to another, but total quantity stay the same.
RESOURCES
ENERGY 
2
1
Renewable Energy
Non-Renewable Energy
Hydropower 
energy
The production of electricity by harnessing the power of flowing water from lakes, rivers, and streams.
Harvested by turning kinetic energy from the motion of water into electricity through the use of a dynamo system.
What is hydropower?
(Sustainable Energy Development Authority,2019)
Important Part of Hydroelectric Power Plant
Important Part of Hydroelectric Power Plant
1. dam
Built across the river to impound water and raised its level. Barrier made of concrete/other impermeable material that reduce the seepage (leaking). Accumulated the water in the reservoir created the source of potential energy.
types of dam
Gravity Dam
Buttress Dam
Arch Dam
Embankment Dam
2. Penstock
Channel built underground from the reservoir through the dam towards the plant To convey very high velocity of water due to different of altitude. Sluice gate control the flow of the water in the penstock to direction of turbine.
3.Turbine
Rotating mechanical components that receive the flowing water trajectory and spins thus giving mechanical truss/torque and convert to mechanical energy. 
It basic element is wheel or rotary with paddle, propellers, blades or buckets. This mechanical energy then transferred through a drive shaft / belting to spin electric generator /armature. 
Turbine can be classified as hydraulic/water turbines, steam turbine/gas turbine. Two types are available due to the axis rotation, most commonly used as Kaplans (rotates vertical axis and Pelton (rotates horizontally).
4. Generator
Machine that produce electrical energy from mechanical energy. 
The movement in the armature in the magnetic field or flux induces current in coil and flow into external circuit. 
5.Transformer
Electrical device consist of one or more coil of wire placed in close proximity to one or more other coil.

Use to couple two or more alternating current circuit together by employing the induction between the coils.

Coil connected to power source called primary and the other is secondary. Transformer which secondary voltage is higher than primary called step up transformer and secondary voltage less than primary called step down transformer. 
5.Transformer
Electrical device consist of one or more coil of wire placed in close proximity to one or more other coil.

Use to couple two or more alternating current circuit together by employing the induction between the coils.

Coil connected to power source called primary and the other is secondary. Transformer which secondary voltage is higher than primary called step up transformer and secondary voltage less than primary called step down transformer. 
Advantages of Hydro Energy 
1. Once the dam is built, the energy is virtually free.
2. Clean.No waste or pollution produced.
3. Much more reliable than wind, solar or wave power.
4.Water can be stored above the dam ready to cope with peaks in demand.
5. Hydro-electric power stations can increase to full power very quickly, unlike other power stations.
6. Electricity can be generated constantly.
7. Renewable
8. Prevent floods
Disadvantages of Hydro Energy
1. The dams are very expensive to build. 
However, many dams are also used for flood control or irrigation, so building costs can be shared.
2. Building a large dam will flood a very large area upstream, causing problems for animals that used to live there.
3. Finding a suitable site can be difficult - the impact on residents and the environment may be unacceptable.
4. Water quality and quantity downstream can be affected, which can have an impact on ecosystem.
6.Harm living species at that area, the land can destroy and furious turbines can kill the fish.

Hydropower (2).pptx

Copy this link to share with friends and colleagues:

WELCOME TO POWTOON!