View stunning SlideShares in full-screen with the new iOS app!Introducing SlideShare for AndroidExplore all your favorite topics in the SlideShare appGet the SlideShare app to Save for Later — even offline
View stunning SlideShares in full-screen with the new Android app!View stunning SlideShares in full-screen with the new iOS app!
The earliest historical reference describes a windmill used to power an organ in the 1st century AD.
Windmills were used extensively in Northwestern Europe to grind flour beginning in the 1180s, and many Dutch windmills still exist.
In the United States, the development of the "water-pumping windmill" was the major factor in allowing the farming and ranching of vast areas of North America, which were otherwise devoid of readily accessible water.
Pumped storage hydroelectricity is a type of hydroelectric power generation used by some power plants for load balancing .
The method stores energy in the form of water, pumped from a lower elevation reservoir to a higher elevation.
Low-cost off-peak electric power is used to run the pumps.
During periods of high electrical demand, the stored water is released through turbines.
Although the losses of the pumping process makes the plant a net consumer of energy overall, the system increases revenue by selling more electricity during periods of peak demand , when electricity prices are highest .
Solar energy is the heat and light radiated from the Sun that powers Earth's climate and supports life
Solar power refers specifically to the conversion of sunlight into electricity by photovoltaics
The absorption of solar energy by atmospheric convection and evaporation and condensation of water vapor powers the water cycle and drives the winds.
Peak wind speeds may not coincide with peak demand for electrical power 174 PW coming in 10 PW reflected by Atmosphere 35 PW reflected by clouds 7 PW reflected by Earth’s surface 33 PW absorbed by Atmosphere 111 PW radiated to space by Atmosphere 10 PW radiated from earth to space 26 PW absorbed by Atmosphere 40 PW latent heat in water vapor 12 PW Conduction & rising air