differentiate between thermal power plant and hydro power plant?
A 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 turbinewhich 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 CO2emissions 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.
electicity produced by using the energy of flowing water is called hydroelectricity.Rain falling on the high ground in hilly areas flows down as rivers.In order to produce electricity,a high rise dam is built to stop the flowing water.Due to this,a large lake or reservoir builds up behind the dam.As more n more water collects in the reservoir,the level of water behind the dam rises to a large height.Thus,the water stored behind a tall dam has a lot of potential energy due to its great height.The sliding gates at half the height of dam are opened to allow some of the stored water to escape.Since the water falls down through a large height from the dam,it flows very fast.Ahigh pressure jet of fast flowing water rotates the turbine through which he shaft also rotates.This drives the generator and produces electricity.