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?
Q. Who discovered Hydro-power? When was this? Why was it needed?
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.
Three Gorges Dam.
In China. Opened in 2003.
In Africa. Opened in 1983.
A picture exhibiting the dams in Africa.
There are MANY dams in Africa.
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?
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.