Hydro-power..

Tori Farrell; Block 7; due, 2-5-13; 80 pts.

This is my Intermediate Info-Book Project. Enjoy. c:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Hydro-power is energy that comes from the force of moving water.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Who? What? When? Where? Why?

Q. What is Hydro-power?

A. It contains two words, ‘hydro’ and ‘power’. ‘Hydro’ means water, and ‘power’ in physics means energy that is used for some purpose. So Hydro-power is a power that generated from the energy of flowing water. Thanks to the technology, we can capture this power and turn it into electricity that is very useful for our daily life.
Hydroelectic Power - How it Works

Q. Who discovered Hydro-power? When was this? Why was it needed?

A. It's believed that the Greeks used water wheels for food purposes, such as grinding grain into flour over 2,000 years ago. Water has been used as a source of energy for centuries. In the early 1800s, Americans and Europeans used their own water wheels to power machines in their factories. No one knows who actually discovered this renewable resource, it will remain a mystery forever..

Q. Where does this occur?

A. Well, obviously it happens near water.. (hydro). So on rivers, near rapids and waterfalls. There is one near the Niagara Falls, and there are so many more areas these places are located.

  • These Hydro-Electric Stations or Plants are almost all over the world! Pretty much every country uses this resource, especially South Africa is getting beneficial feedback. The US department of energy estimates that there are about 6,000 to 8,000 suitable areas for hydro electric generation. Many of these plants would be under 100 mega watt, but all these together would ensure a greater sustainable future for South Africa. We do already have a 1,000 megawatt Pumped-Storage Facility in the Drakensberg but there are still many chances for more small scale plants.

More Facts..

Q. How does it work?

A. A dam is built where there is a natural lake or a big river. The dam is used to hold the water and create pressure so that the water can produce more electrical power. There is gravitational potential energy stored in the water and this energy is used to turn generators and create electricity. These turbines are within tunnels in the dam wall. Electrical generators are turned by these massive turbines and create electricity. Water flows through these tunnels with a lot of pressure and is used to turn the turbines. The water has large pressure due to the big height which is kept in the dam. If there is a greater volume of water or there is a very large difference between the water level and where it flows out than you can get more power out of the water as it has greater potential energy. This difference in height of the water is called the head. The generator contains 2 main parts: the rotor and the stator. The rotor is the part which rotates and the wire has a huge magnet inside of it; and the stator is the part which is covered in copper. The electrical current is created when the rotor spins around the copper wire on the stator. This is the charge which is then used as electricity.


Q. What is the use of Hydro-power?

A. To produce electricity for powering factories, offices, homes, kitchens and living rooms. Everywhere!

Q. Is Hydro-power exspensive?

A. The biggest expense of Hydro-power isn't producing the energy, but usually the construction of the dam itself. Also especially all the politics and lawsuits involved with creating a reservoir behind the dam. Environmentalists usually file lawsuits to prevent new dams from being built because it floods the habitat of animals. You would have to buy a large amount of land to create a large Hydro-power plant, because you are planning on flooding at least several square miles of land. Hydro-power also depends on a good source of flowing water that most likely has cities already built along it, and depends on the surrounding land. So it can cost a lot, depending if you're using it for yourself or its a huge company.

Q. Who produces and uses Hydro-power?

A. ------------>

In Conclusion..

Hydropower is the cheapest way to generate electricity today. That's because once a dam has been built and the equipment installed, the energy source—flowing water—is free. It's a clean fuel source that is renewable yearly by snow and rainfall. Hydropower is also readily available; engineers can control the flow of water through the turbines to produce electricity on demand. Also reservoirs may offer many opportunities, such as swimming and boating. But damming rivers may destroy or disrupt wildlife and other natural resources. Some fish, like salmon, may be prevented from swimming upstream to spawn. Technologies like fish ladders help salmon go up over dams and enter upstream spawning areas, but the presence of hydroelectric dams changes their migration patterns and hurts fish populations. Hydropower plants can also cause low dissolved oxygen (DO) levels in the water, which is harmful to river habitats.

Thanks for reading c: