It is known to us that energy become more and more important to human beings. People can not live without energy. They use energy everywhere, but pew of them can give a clear definition of it. Because of people’s widely use, the energy on the earth reduces steadily, people are trying o find the energy which can be renewable. Energy is the thing which has the ability to work. It can be stored or be a poverty of an objects motion. It can move from one object to another, and defines the capacity of system to do work. Obviously, renewable energy is the energy which can be used over and over again, from natural sources. There are so many renewable energy people use nowadays. For example, they use solar energy, the wind and the hydro power. From year 1981 to 1991, renewable energy developed very fast, and the following text may concentrate on the hydro power.
Hydro power is the energy driven by water turbine, People always use it to produce electricity. The falling water drives the turbines, and the turbines in turns to drive the generators. Then the generators translate the turbines’ mechanical energy into electricity. The hydrologic cycle produces neither atmospheric nor the normal pollution. Hydro power has been used since ancient time, and is can be used for grinding floor and performing other tasks. In 1878, the world’s first hydroelectric station was developed in NORTHUNLAND, and by 20th century, it become the largest part of renewable energy all over the world.
Everything has two faces. Though the hydroelectric has a lot of advantages, for its low cost and low pollution, still it has some disadvantages. In some Asian countries, like Philippines and China, people can see the hydroelectric production clearly by year. There are some hydroelectric stations which are typical in these countries. Like the Bela in Philippines and the Three Gorges Dam in China. What’s more, we can also know something about the development of hydroelectric in these countries.
The following text will give more details about the hydroelectric production, the hydroelectric stations and the future development of hydroelectric in Philippines and China.
Ⅰ.Hydropower production by year
Since the first Edison hydroelectric power plant begin to use in 1882, September 30th, (industry archive logy review, 1987), hydroelectric become fast developing. During 1981 to 1991, it developed very fast. It can be seen clearly that hydroelectric become more and more important in human’s daily life, and also they can see the trend of development of hydroelectric in Philippines and China.
In Philippines, people can get the information directly from the line chart that there was a fluctuation in it. It produced about 3.8 billion KWH in 1980, and had a tiny increase reached at 4 billion. Then it fell back to 2 billion KWH in 1983 and raised again. It has risen steadily from year 1983 to year 1986, from 2 billion KWH to 6billion KWH. Things looked the same from then on, but the trend is increasing. By the year 2003, the production of hydroelectric power was more than 10 billion KWH. After that, it remained steadily, by the year 2010, the production of hydroelectric was 9.8 billion KWH. Hydroelectric in Philippines takes 19% of all electricity consumption and the rate constant for decades. (Bronuyn-W, 1998)
However, in China, the hydroelectric production grows steadily. It has risen from 80 billion KWH in 1980 to more than 300 billion KWH in 2003. People can predict from the line chart that it will be a more and more part of energy in Chinese electric production. It takes about 49% of all the renewable energy in China. (World Institute, 2010)
Hydroelectric is very important, not only in these two countries, but also all over the world. In Democracy Republic of Congo, Paraguay and Brazil, hydroelectric takes 85% of their electric. In the USA, more than 50% of electric comes from it. That means hydroelectric really plays an important...