Defining the Different Types of Water Power
Using water to harness power is a tradition, which goes back over two thousand years ago when the Greeks learned how to turn massive wheels to rotate shafts for their wheat flour grinders. In the 18th century, there were literally thousands of communities around the world that used water energy (hydro energy). Hydro power uses the form of falling water by gravity to produce useful energy. The falling water is directed through a turbine, causing it to spin. The spinning turbine is connected to a generator, which produces energy. Small-scale hydro systems have several advantages. The generation process produces no pollution. It doesn’t require a large dam or reservoir; some systems can be powered by only a small stream so that a little bit of water goes a long way. More recently, many people have been using water on a smaller scale to generate electricity without the problems and costs involved with fossil fuels or large dams. Small-scale water power is one of the most environmentally sound and friendly ways to produce electricity.
In today’s world, there are small hydropower projects are in place in remote communities such as India, China, Peru and Nepal, Malaysia, Vietnam, and also in highly industrialized counties including the United States. This type of hydro power offers an emissions-free solution. Hydro power systems take the energy in flowing water to make electricity.
Hydro energy is a significant renewable energy source, competitive to fossil fuels and nuclear energy. In approximately the last thirty years, the production of energy in water power plants has tripled. Nuclear power plants have, in that same period, almost hundred times more production growth, due to restrictions that hydro energy has. It can not be used in all locations due to the need of an abundance of fast flowing water, and the need to have the power to last throughout the year. To negate effect of water level’s fluctuation, water gates, as well as accumulation lakes are built, which significantly increases whole power plant’s expenditures, and also raises the level of underground waters near the accumulation. Underground water level has a large influence on flora and fauna, so hydro-energy isn’t completely harmless for environment. It is estimated that only about 25% of world’s hydro energetic potential is used. Most of the unused potential is located in the under developed countries.
There are three main kinds of hydro electrics: Fluid, accumulative (hydro electric dam), and the reversible (pumped-storage plants) hydro electric. By explanation, fluid hydro electrics are the ones that do not have upstream accumulation or its accumulation can be emptied for less than two hours with nominal power. This means that almost direct use of kinetic energy of the water is used for the turbine’s movement. These hydro electrics are the simplest to construct, but are very dependant upon the fluidity of the water. With hydro electric dams the critical parts are accumulation, dam, clench, gravity intake, water chamber, rail chamber, pressure pipelines, engine room and water vent. There are two types of hydro electric dams: Near the dam and derivational. Near the dam is located under the dam itself, and derivational is located much more below the dam with pipelines as connectors to accumulation. Hydro electric dams are the most often used source of gaining electricity from water’s energy. Problems occur during the summer months, when natural flow gets too small for hydro electric’s functioning. In that case, the dam must be sealed and it is necessary to at least maintain water level, which is biological minimum. A problem can arise when the underground water level decreases, but the growing desire for renewable fuel, as well as the concern for a cleaner environment, makes the performance of hydro power an exceptional solution for solving energy needs.