Wind Energy

(a) What is wind ? What type of energy is possessed by wind ? (b) Explain how, wind energy can be used to generate electricity. Illustrate your answer with the help of a labelled diagram. (c ) State two advantages of using wind energy for generating electricity. (d) Mention two limitations of wind energy for generating electricity.

Some renewable sources of energy are given below : solar energy, tidal energy, biogas energy, hydel energy , OTEC, wind energy, geothermal energy, ocean wave energy. Which of the given sources are more reliable and consistent in availability.

A wind - powered generator convets and energy into electrical energy . Assume that the generator convents a fixed fraction of the wind energy intercepited by to blades into electrical energy for wind speed V , the electrical power output will be propertional to

Which of the following sources of energy are not derived from the sun ? Biomass, Wind, Ocean thermal energy, Geothermal energy, Nuclear fuels, Hydroelectricity, Wave energy, Coal, Petroleum, Tidal energy

The blades of a windmill sweep out a circle of area A. (a) If the wind flows at a velocity v perpendicular to the circle, what is the mass of the air passing through in time t? (b) What is the kinetic energy of the air? (c) Assume that the windmill converts 25% of the wind's energy into electrical energy, and that A=30m^2 , v=36kmh^-1 and the density of air is 1.2kgm^-3 , what is the electrical power produced?