It is working of thermal power plant. It is also called “Steam Turbine Power Plant.” The theory of thermal power station or working of thermal power station is very. Application of System Analysis for Thermal Power Plant Heat . fired power generators of the Organisation for Economic Co-operation and Development. than ever before. This has become the mainstream type of thermal power plant in Japan. operation of all nuclear power plants owned by The. Tokyo Electric.
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Secondly, the operation of the plant should be such as to provide The fundamental forms of energy with which thermal power stations are. PDF | Today, most of the electricity produced throughout the world is from steam power plants. However, electricity is being produced by some. efficiency among commercial power plants today. established part-load strategies for part-load operation of steam-cycle power plants.
A thermal power station is a power station in which heat energy is converted to electric power. In most of the places in the world the turbine 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 heat sources; fossil fuel dominates here, although nuclear heat energy and solar heat energy are also used. Some prefer to use the term energy center because such facilities convert forms of heat energy into electrical energy.
Thermal power generation plant or thermal power station is the most conventional source of electric power.
It is working of thermal power plant. The thermal power plant mainly consists of a Steam turbine that is hydraulically coupled with Excitation Generator OR Alternator. That means the high pressure wet steam is changed into low pressure wet steam.
Here it refers to the shell and tube type heat exchanger or surface condenser installed at the outlet of every steam turbine in thermal power stations of utility companies generally. In this process the coal feeded to the coal feeder from the coal bunker. The coal feeder is feeded with the coal by the help of chain drives or belt drives.
Here after it comes to the economiser -2 first and ecomiser This constitutes cooling water circuit. Economiser ,evaporator.
We normally use surface condenser although there is one direct contact condenser as well. In direct contact type exhaust steam is mixed with directly with D.
M cooling water. Boiler feed pump Boiler feed pump is a multi stage pump provided for pumping feed water to economiser. BFP is the biggest auxiliary equipment after Boiler and Turbine. Cooling tower The cooling tower is a semi-enclosed device for evaporative cooling of water by contact with air.
The hot water coming out from the condenser is fed to the tower on the top and allowed to tickle in form of thin sheets or drops. The air flows from bottom of the tower or perpendicular to the direction of water flow and then exhausts to the atmosphere after effective cooling. The cooling towers are of four types: - 1.
Natural Draft cooling tower 2. Forced Draft cooling tower 3. Induced Draft cooling tower 4.
Balanced Draft cooling tower Fan or draught system In a boiler it is essential to supply a controlled amount of air to the furnace for effective combustion of fuel and to evacuate hot gases formed in the furnace through the various heat transfer area of the boiler. This can be done by using a chimney or mechanical device such as fans which acts as pump.
When the gas within the stack is hot, its specific weight will be less than the cool air outside; therefore the unit pressure at the base of stack resulting from weight of the column of hot gas within the stack will be less than the column of extreme cool air. This generated electrical voltage is then stepped up with the help of a transformer and then transmitted where it is to be utilized.
Feed water pump: The condensed water is again fed to the boiler by a feed water pump. Some water may be lost during the cycle, which is suitably supplied from an external water source.
This was the basic working principle of a thermal power station and its typical components. Less initial cost as compared to other generating stations. It requires less land as compared to hydro power plant. The fuel i. The cost of generation is lesser than that of diesel power plants. It pollutes the atmosphere due to the production of large amount of smoke. This is one of the causes of global warming. Efficiency of a Thermal Power Station. A huge amount of heat is lost in various stages of the plant.
Major part of heat is lost in the condenser. That is why the efficiency of thermal plants is quite low.
Thermal Efficiency: The ratio of 'heat equivalent of mechanical energy transmitted to the turbine shaft' to the 'heat of coal combustion' is called as thermal efficiency. It means, if calories of heat are produced by coal combustion, the mechanical energy equivalent of 30 calories will be available at the turbine shaft.
Overall Efficiency: The ratio of 'heat equivalent of electrical output' to the 'heat of coal combustion' is called as overall efficiency.