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It scavanges oxygen in water systems to prevent corrosion of piping.
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Operation of a combined cycle power plant?
A combined cycle power plant has multiple thermodynamic cycles. This increases efficiency. For example, a gas turbine can be used to produce electricity, but only about 40% of the heat is actually converted in the process. 60% of the heat is lost, and in a single cycle plant would be considered waste heat. In a combined cycle plant, that waste heat could be used to drive a second, steam turbine to produce more electricity. In such a case, the efficiency could be increased from 40% to nearly 60%. It is possible to go further. The waste heat from the combined cycle electric plant can be used to heat buildings, for instance, increasing overall efficiency to more than 65%. This is called Cogeneration.
What is the Disadvantage Steam Power Plant?
Steam driven power plants necessarily lose heat , regardless of how the power is generated (oil, nuclear, geothermal, etc.), because only about 35% to 40% of the energy in the steam can be recovered to make power. This can be improved a little bit by having a secondary system, called a combined cycle system. It can also be improved by using waste heat to heat buildings. The limit, by combining all of these, seems to be a little less than 70% efficiency.
What kind energy does a power plant have?
It depends on the type of power plant. Some of the most common is coal (which is used to make steam to create power) one of the least common in the us is nuclear power.
What is the steam in a power plant used for?
Mostly to drive the steam turbine. Smaller amounts may be used for in house tasks like preheating feed water.
What is dearater in thermal power plant?
It removes the gases present in the steam,given by heaters.dearater is necessary otherwise the gases in steam will corrode the boiler and also affect the turbine.
What is the functions of heat power cycle in a steam power plant?
There is no such thing as a heat power cycle in a steam engine.The power stroke, or strokes, result from pressurised steam being let into the cylinder and moving the piston.
Does combined cycle power plant has a boiler?
No It has heat recovery steam generator
What are reasons for over speed tripping of steam turbine genarator in a combined cycle power plant?
wHAT??
What is the efficiency of thermal power plant?
A modern combined cycle gas turbine/ steam turbine power plant can reach almost 60% efficiency.
Why not super heated steam used in nuclear power plant?
Actually, superheated steam is used in nuclear power plants. It is part of the goal of extracting the most energy possible from the steam cycle.
Limitations of the Carnot cycle for the operation of the steam power plant?
The Carnot cycle gives the theoretical maximum efficiency of an engine operating between two heat reservoirs. The Carnot cycle is an idealized engine cycle that is thermodynamically reversible. Real systems such as power plants are not reversible, and the entropy of a real material changes with temperature (which is not accounted for by the Carnot cycle). A steam power plant operates closer to a cycle known as the Rankine cycle.
Why you use condensor in the steam power plant?
The steam exiting the low pressure end of the turbine has to be condensed back to water in order to be pumped back at high pressure to the inlet of the steam raising units. The cycle is called the Rankine cycle and is common to all steam type power plants whether fossil fired or nuclear.
What is the difference between combined cycle and cogeneration?
In Cogeneration Plant : The generated steam in boiler is used for both power generation & process heating, thereby reducing the condenstion losses compared to thermal power plant. In combined cycle first is gas turbine , rather than wasting the flue gas from gas turbine, we are sending it into boiler and again generating steam for running steam turbine. Both the ways we are increasing the thermal efficiency of the plant
What does a reactor do in a nuclear power plant?
The reactor in a nuclear power plant generates heat to flash water to steam, which spins turbines that generate electricity. This is not really any different, in terms of steam cycle1, than a fossil plant. Its just that the source of heat is nuclear fission of (usually) uranium-235 instead of the burning of coal, oil, or natural gas. ----------------------------------------------------------------------------------------------- 1Well, its a little bit different because the nuclear steam supply cycle runs best on a slightly lower pressure and temperature than a fossil fuel plant steam cycle does. Other than that, the steam and generating parts of a nuclear plant are very comparable to a fossil plant.
What has the author George Frederick Gebhardt written?
George Frederick Gebhardt has written: 'Steam power plant engineering' 'Steam power plant engineering' -- subject(s): Steam power plants
What is geothermal power plant?
All geothermal power plants use steam to turn large turbines, which run electrical generators. This steam comes from steam produced from reservoirs of hot water found a couple of miles or more below the Earth's surface. There are three types of geothermal power plants: dry steam, flash steam, and binary cycle.
Why is superheated steam at high pressure frequently employed in the steam cycle?
The efficiency of power plant based on the Rankine Cycle can be calculated from the Temperature-Entropy (Ts) Diagram. Area on the Ts Diagram represents energy. The efficiency of the cycle can be calculated by dividing WorkOut (the area enclosed by the cycle) by HeatAdded. Note that HeatAdded - WorkOut = HeatRejected. Increasing the steam temperature and pressure improves the ratio of these areas. Where the pressure is increased to above the Critical Point, the steam plant is described as Super Critical. Increasing the degrees of superheat in the steam also reduces the wetness of the steam in the last row of blades in the turbine.
