Describe how hydro-energy can be converted into electrical energy. Write any two limitations of hydro-energy
Answers
See the kinetic energy of flowing water is used to turn the blade of turbines which produces energy.
Basically kinetic energy gets coverted into mechanical energy and then into electrical energy
The limitations are-
1) Due to the construction of dams large scale plants and animals get submerged and then get rot to produce methane which is again a green house gas.
2) Construction of dams lead to unsatisfactory re-habillation
Conversion of hydro energy into electrical energy
High rise dams are constructed on the river to obstruct the flow of water to collect it at a suitable height. The stored water has a lot of potential energy.
The water from a suitable height is allowed to fall on the blades of a turbine located at the bottom of a dam through a pipe.
Kinetic energy of flowing water rotates the turbine rapidly. Rotation of turbine helps the armature coil of generator to rotate rapidly in the magnetic field. Thus, hydroelectricity is generated.
Limitations of hydro energy:
(i) All river-sites are not suitable for construction of dams.
(ii) Large ecosystems are destroyed when submerged under the water in dam.