The movement of air under atmospheric pressure differences create wind; So this is also an endless source of energy compared to human life. Wind energy was used to pump water and sailed from thousands of previous performance. Recently, however, wind is being used to push the generator rotors serve human life. With the advantage of wind energy is never empty and free, these cameras as well as the wing wind brass wind camcorder was born. This type of waste will not create environmental pollution and almost very suitable for remote urban areas, where the national grid is difficult to reach. However, like solar, energy forms also require relatively high investment and dependence on nature. With the advancement of science and technology, the type of energy has appeared many in the highly industrialized countries and the potential promise a promising business. Currently the research and application of synthesis is applied to this energy source to limit the ability of its instability to put into the power grid as well as wind energy reserves in an alternate format is being conducted places including Vietnam. 2.2.3 Energy Tide (Tidal-Power) Tidal power applications ebb flow to the rotor running generator. This is a form of energy has infinite fuel source and free. This type of model does not produce environmentally harmful waste and does not require high maintenance. Unlike the model solar and wind power, tidal energy is quite stable because the tide of the day can be predicted accurately. The disadvantage of this type of energy that requires a large amount of investment for equipment equipment and construction and also alter the natural conditions of an area very rong.Ngoai out this model works only for a short time during the day when the tide ebb and also very few places in the world favorable terrain for the construction of this power source efficiently. 2.2.4 Energy Water Power (Hydro-Power) Many people still think this is a classic form of energy because it occurs with humans thousands of years and is widely used for supplying electricity consumption besides the fuel type of energy metabolism completely. Water stored in the reservoir by the giant dam. When water is dropped from high to create a certain amount of energy corresponding to the mass of water and proportional to the gravity and altitude. The volume of energy that will turn the generator rotor (the potential energy of water this time transformed into kinetic energy) and generate electricity for use. Investing in this type of energy, but also quite expensive fuel it uses almost endless and require little maintenance. This type of waste is not to create environmental damage. Power is generated from this model has high stability and is likely to increase and decrease the amount of electricity should be instantly applied widely in the world and occupies the most important part of Vietnam in the time grid Current point. However, as noted above, the disadvantages of this type of energy models is quite high initial investment. Simultaneously building dams vary greatly temple ecological environment of upstream and downstream. This type of model usually carry some side effects such as water regulation and flood control itself but also potential negative effects on water regulation and flood causing unnecessary if not designed reasonable . In addition, the shortage of power globally has accelerated the construction of hydropower plants in the years that water use started to become scarce. Without the appropriate measures to improve the advantages of this model will become the agents adversely affect society. 2.2.5 Energy from the Sea Waves (Wave-Power)
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