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Subject: Science , asked on 3/3/15

differentiate between thermal power plant and hydro power plant?

thermal power station  is a  power plant  in which the  prime mover  is  steam  driven. Water is heated, turns into steam and spins a  steam turbine which drives an  electrical generator . After it passes through the turbine, the steam is  condensed  in a  condenser  and recycled to where it was heated; this is known as a  Rankine cycle . The greatest variation in the design of thermal power stations is due to the different fuel sources. Some prefer to use the term  energy center  because such facilities convert forms of  heat   energy  into electricity. [1]  Some thermal power plants also deliver heat energy for industrial purposes, for  district heating , or for  desalination  of water as well as delivering electrical power. A large part of human CO 2 emissions comes from fossil fueled thermal power plants; efforts to reduce these outputs are various and widespread. whereas  Hydropower  or  water power  is  power  derived from the  energy  of falling water, which may be harnessed for useful purposes. Since ancient times, hydropower has been used for  irrigation  and the operation of various mechanical devices, such as  watermills sawmills textile  mills, dock  cranes , and domestic  lifts . Water's power is manifested in  hydrology , by the forces of water on the  riverbed  and banks of a river. When a river is in flood, it is at its most powerful, and moves the greatest amount of  sediment . This higher force results in the removal of sediment and other material from the riverbed and banks of the river, locally causing  erosion , transport and, with lower flow,  sedimentation  downstream.

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