 Hydroelectric power

Nuclear power Chain reaction Shoot neutron Uranium splits into lighter nuclei releasing heat and neutrons Neutrons hit other uranium nucleus (chain reaction) Hit the refined uranium

Wind power Turbine inside the machine will turn the generator to create electricity

Fossil fuel power  Burn fuel  Heat water to create steam  Steam turns turbine  Turbine turns generator  Generator makes electricity

What is hydroelectric power?  It’s simply the energy from falling water.  Energy transition Potential Energy Mechanical energy Kinetic Energy

Hydroelectric schemes Conventional method (dam) Pumped Storage Using river flow

Conventional method (dam) Uses dam to store water in reservoir of higher energy level Water falling from the dam will turn the turbine Turning turbine will generate electricity

Pumped Storage Use excess generation capacity to pump water to reservoir at higher elevation Usually used at time of peak demand or shortage

Using river flow Uses the natural flow of water of a river to turn the turbine to generate electricity. River flow hydroelectric stations are those with small or no reservoir capacity

Hydroelectric power is a renewable energy It is renewable because the water used will evaporate and eventually precipitate to refill the reservoir Is hydroelectric power renewable? If it is, why is it?

 Hydroelectric power is usually used in countries with valleys or with rivers.  It is used in Norway, Switzerland, Austria and United States

Advantages of hydroelectric power  Once a dam is built, the energy is free to use  Dams are designed to last for decades, therefore can supply power for a long time.  It can be also used for other purposes such as irrigation so that the cost of constructing dam can be shared

Disadvantages of hydroelectric power  The cost of building a dam is huge  Natural environment may be destroyed  People living in regions that are to be flooded should move out.

Is hydroelectric power suitable for Jeju island?  Hydroelectric power is usually suitable for those countries with rivers  Jeju island does not have any rivers but only some dry valleys and creeks  Hydroelectric power may not be ideal energy source for Jeju island  Jeju island can take advantage of strong wind to create energy

The End