Tell about the renewable energy.?

Answer 1

Solar, Wind, Hydro, Biomass, etc.: There are many, but it depends a bit on what you mean by "alternate." Mostly, people mean sources other than fossil fuels (oil, coal, natural gas), and maybe nuclear fission as well. Personally I prefer the term "renewable" sources of energy because the meaning is more clear, and maybe someday in the future, renewable energy sources will be our main source of power, and won't be "alternate" at all!

Solar: Solar power can be used to make both electricity and fuels with solar panels. These panels take energy from sunlight and turn it into either electricity or they drive a chemical reaction to make a fuel (hydrogen gas for instance). More energy from the sun hits the earth's surface in one hour than ALL the energy used by people on the entire earth in one year!

Hydroelectric: By building a dam on a river, and only letting the water pass through a small passage, you can use the force of the moving water to spin a turbine to make electricity

Geothermal: If you drill down deep enough into the surface of the earth, you will reach very hot rocks. You can inject cold water into this deep hole, and the rocks heat the water, turning it to steam. You can then use this steam to turn a turbine to make electricity.

Wind: Giant windmills spin to make electricity from the force of wind moving through the blades of the windmill.

Biomass: Many plants can be turned into chemical fuels that can be burned. Ethanol is the most common, and usually corn or sugar cane is grown to make ethanol. You can burn ethanol in many cars just like gasoline.

Waves and Tides: The movement of water due to crashing waves or rising and falling tides can be used to spin a submerged propeller or a turbine to make electricity -

Answer 2

Renewable Energy sources are any energy sources that are replaced at the same rate (or faster) than it they are being used. All energy originates from the Sun, whether it be from coal, wind or solar. Although all energy sources are 'renewable' many such as coal, natural gas and oil otherwise known as finite resources are being replenished at such a slow rate that they are being rapidly used. At present, wind energy is the fastest growing energy source in the world and is being taken up by most countries, particularly those with coastal regions and in Europe. Other areas of renewable energy resources include bio-fuels (e.g. ethanol) and hydrogen both of which have the potential to be used in transportation.

Answer 3

Renewable Energy sources are the energies that are replaced naturally. Such energy originates from the Sun, wind or agri crops. The wind energy is the fastest growing electrical energy source in the world and is being taken in coastal regions. Other areas of renewable energy resources include bio-fuels (e.g. ethanol) and hydrogen both of which have the potential to be used in transportation. The energy can not be created or extinguished. It can be changed from one form to the other.

Solar: Solar Energy is used to make electricity and fuels with solar panels. These panels take energy from sunlight and turn it into either electricity or they drive a chemical reaction to make a fuel (hydrogen gas for instance).
This energy is also used to heat water for industrial, commercial and domestic use using flat bed collectors. This energy coming from sun to the earth's surface in one hour is more than ALL the energies put together and used by the entire earth in one year.

Hydroelectric: is generated by storing water in a dam on a river and passing through a guided path to move water turbine to make electricity.

Geothermal: Deep into the surface of the earth, very hot rocks are there. The cold water is injected into this and the rocks heat the water, turning it to steam. This energy can be used to turn a turbine to make electricity.

Wind: Giant windmills spin to make electricity from the force of wind moving through the blades of the windmill.

Biomass: Plants contain fibers and chemical compounds. These can be turned into fuels that can be burned. Sugar cane is one such example. Bagasse and Ethanol is the most common. Usually corn or sugar cane is used to make ethanol. The ethanol blends with gasoline are used in many cars.

Waves and Tides: The movement of water due to rising and falling waves/ tides is used to spin a submerged propeller or a turbine to make electricity -

Answer 4

Renewable energy flows involve natural phenomena such as sunlight, wind, tides and geothermal heat. Renewable energy technologies range from solar power, wind power and hydroelectricity through to biomass and biofuels for transportation. About 13 percent of primary energy comes from renewables and the technical potential for their use is very large.

Renewable energy technologies are sometimes criticised for being unreliable or unsightly, yet the market is growing for many forms of renewable energy. Wind power has a worldwide installed capacity of 74,223 MW and is widely used in several European countries and the USA. The manufacturing output of the photovoltaics industry has now reached more than 2,000 MW per year, and PV power plants are particularly popular in Germany. Solar thermal power stations operate in the USA and Spain, and the largest of these is the 354 MW SEGS power plant in the Mojave Desert. The world's largest geothermal power installation is The Geysers in California, with a rated capacity of 750 MW.Brazil has one of the largest renewable energy programs in the world, involving production of ethanol fuel from sugar cane, and ethanol now provides 18 percent of the country's automotive fuel. Ethanol fuel is also widely available in the USA.

While there are many large-scale renewable energy projects, renewable technologies are also suited to small off-grid applications, sometimes in rural and remote areas, where energy is often crucial in human development. Kenya has the world's highest household solar ownership rate with roughly 30,000 small (20-100 watt) solar power systems sold per year.

Climate change concerns coupled with high oil prices and increasing government support are driving increasing renewable energy commercialization. Investment capital flowing into renewable energy climbed from $80 billion in 2005 to a record $100 billion in 2006. Some very large corporations such as BP, GE, Sharp, and Shell are investing in the renewable energy sector.

Answer 5

Renewable energy is nothing but which cannot exhaustible like wind energy, solar energy and other means of natural sources. It is a source of perennial energy.

Answer 6

Solar power (a.k.a. "photovoltaic power) is power collected by solar cells which convert heat from the sun into usable energy. Wind power from windmills are still used today-- in fact some places out in the Mojave desert are completely covered with row on row of modern wind-mills, which are much more stream-lined than the Don Quixote models of ages past. Hydro-electricity is harnessed by dams such as the Hoover Dam and Niagara Falls Dam (Mohawk Power Project) from flowing water and Geo-thermal energy from heat sources within the Earth, like geysers and hot springs (one of the rarest kind of renewable resource-type energies).

Answer 7

In truth energy is not renewed. Energy goes round and round.

Answer 8

Renewable energy are the sources of energy that can be recycled or reused. it is important that we will have to use renewable sources of energy. They are also non polluting form of energy.

Answer 9

renewable energy is the energy that can be used over n over again, it replenishes itself. eg. solar energy is the best example of a renewable source.

Answer 10

here is a deinition of it

Energy obtained from sources that are essentially inexhaustible, unlike, for example, the fossil fuels, of which there is a finite supply. Renewable sources of energy include wood, waste, geothermal, wind, photovoltaic, and solar thermal energy.