Difference Between Wind Energy and Hydroelectric Power
Electric produced by trapping the energy of failing water is known as hydroelectric power. The large quantity of water, often held captive to increase the force, turns a turbine which is used to run a generator. Power lines take the electricity from the generator to where it is needed. This form of energy is cleaner than fossil fuels but there are huge controversies surrounding the impact of holding huge amounts of water behind a human made dam.
We feel the power of the wind almost every day. It can make leaves rustle; blow our hair out of place and, when blows hard, even blows a rooftop down.
Wind is air in motion. It moves from an area of high pressure to a low pressure. When the sun’s heat reaches the earth, air and the ground absorb it. Some places heat up faster than others. The hot air rises, crating a low pressure area. Cool air rushes the earth, air the ground absorb it. Some places heat up faster than others. The hot air rises, creating low pressure area. Cool air rushes to fill that space, creating wind. Abut 1 to 2 percent of solar energy is responsible for the generation of wind energy.
When the wind turns the blades of a windmill, a turbine inside starts moving. It powers a generator that produces electricity. Unlike solar energy, wind is sample all over the earth. It is a renewable source of energy. Using wind energy to generate electricity is cheaper than other sources. Since the use of wind energy does not release any greenhouse gas, it is a clean, non- polluting form of energy. It does have a few disadvantages. Each turbine generates only a small amount of energy, so wind energy may not be able to meet our major energy needs. The turbines can be noisy. Wind farms can be a danger to flying bids.
Advantages of using hydroelectric power
• Hydropower is absolutely free because the water cycle is a continuous process.
• There are no water products, so it does not pollute the air or the water.
• Dams can be used for flood control, navigation, recreation and water supply.
Disadvantages of using hydroelectric power
• Hydroelectric dams are expensive to build.
• When people have to be relocated to contract dams, there is a lot of suffering.
Advantages of using wind energy
• The energy is absolutely free and renewable.
• There are no hazardous emissions or adverse environmental impacts.
• Being modular, additional turbines can be added if the need arises.
• The construction time is much shorter than a typical fossil fuel plant.
• It can be used for remote areas that are not connected to the main electricity grid.
Disadvantages of using wind energy
• Wind turbines make a lot of noise
• Windmills could be dangerous to birds.
• The speed of wind keeps on changing and at times there is no wind at all.