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Steam power plant; Steam power plant is that plant which is working with the help of steam, and this steam is obtained from boiling of water, coal, or from another source. Now we discuss the power plant which is working on the basis of water. The steam power is used for many purposes, such as for heating, to run industry and to generate electricity. Nowadays, it is mainly use for generating electricity on small and on large scale. Mostly in the Europe countries the electricity is produce by the steam power plant, such as in the united state the electricity is produce in the steam power plant and the electricity from the steam power plant is continue to improve the energy shortage in the world and to increase the economy of the world, and there is steam cycle is used in the electrical power plants and production of power in the industry are based on the rankine cycle. Working principle of the steam power plant; The working principle of the steam power plant is given below. In the steam power plant there is a working substance is water, and the water is store in water storage tank from which water is feed into the boiler, for this purpose a water feeding system is use which feed the water from water tank to the boiler by the pump in order to produce the steam in the boiler by heating the water in the boiler and also with the boiler there is a super heater also there is a bypass from boiler to the turbine and also boiler is direct connected with the super heater. The purpose of super heater is that, if the required pressurized steam is not obtained then we sent the steam from boiler to the super heater to heat up again that steam and increase the pressure of the steam and this pressurized steam is then sent to the turbine which run the turbine by moving the blade of the turbine with the help of steam produced in the boiler and super heater, the super heater is connected with the generator by the help of belt, so when the turbine is rotated then the generator is also run and to generate the electricity and the remaining steam vapours which are remained which is go to the condenser where there is condensed the steam vapors’ by passing the cooling the water into the condenser and this condensed vapors into liquid  water and again it is reuse and recycled to generate the steam in the boiler and in the way the cycle is repeated. Main parts of the steam power plant; The main parts of the steam power plant are the following, which are given below. Water storage tank Boiler Super heater Turbine Condenser Generator Function of the main parts of the steam power plant; •	Water storage tank; In steam power plant there is a water storage tank in which water is store to produce steam in the boiler. •	Feeding system; The feeding system consist of water feeding pump, which feed the water from water tank into the boiler to produced steam in the boiler. •	Boiler ; The boiler is the main source of steam producing in the steam power plant. The boiler is heat up directly or indirectly from the heating source in order to heat up the water and to produce steam in the boiler which are then use to run the turbine. •	Super heater; The super heater is use to heat up again the steam of boiler in order to obtained the desired pressurized steam and increase the temperature of the boiler steam so as to increase the efficiency of the steam power plant by increasing the temperature of steam which is use for the running of turbine and generator. •	Turbine; The turbine is a device having a blade which is rotated with the help of steam coming from the boiler or from the super heater, which rotate the turbine and the turbine run the generator. •	Condenser; The condenser is connected between the turbine and  generator and the main purpose of the condenser is to condense the water vapors in the steam comes from the turbine  for reuse or recycle the in the steam power plant and to maximize the turbine efficiency by maintaining the proper vacuum. •	Generator; The generator is connected with the turbine with the help of belts and pulley so when the turbine is rotated by the steam coming from the boiler then the generator also run and generate the electricity, which is used for power plant and to run the industry, also for many other purposes, such as home electricity, power plants. To improve the efficiency of steam power plant; The efficiency of the steam power plant is increase by increasing the temperature at which heat is transferred to working fluid in the boiler or by decreasing the heat rejection  from working fluid in the condenser. Simply we can say that the efficiency of the steam power plant is increased by the low input and high output. •	Lowering the temperature of condenser. •	Superheating the steam in the super heater to a high temperature. •	By increasing the pressure of boiler. •	By decreasing the pressure of condenser. •	Also we note that the efficiency of steam power plant is higher than the gas power plant and the solar power plant because the steam is more powerful. •	Also the efficiency depend upon the large amount of heat rejecet from the condenser and the temperature of steam. •	Boiler used in the steam power plant; The boiler used in the steam power plant may be a water tube boiler or fire tube boiler but the water tube boiler is suitable as compared to the fire tube boiler because the efficiency of water is more as compared to the fire tube boiler. One of the important part of a boiler is super heater and it effects the efficiency of the power plant and also to improve the economy as given below. •	The capacity of the plant is increased by the super heater •	And also reduce the corrosion of the steam turbine. •	And to reduce the consumption of the steam turbine. Condenser effect the turbine; By decrease the condenser operating pressure which effect the following, •	Which increase the output of turbine. •	And also increase the efficiency of the plant. •	Also reduce the steam flow Bold text