Table of Contents
Why is steam extracted from a turbine?
As in back-pressure turbines, extracted steam can be used for many industrial processes, or it can be used to improve the efficiency of the thermodynamic cycle. It means that the greater the flow of feedwater, the greater the rate of heat absorption from the steam and the greater the flow of extraction steam.
What is turbine extraction?
Definition of extraction turbine : a steam turbine provided with taps through which steam may be drawn off at various stages for purposes (such as heating) other than driving the turbine.
Why does a power plant need to produce steam What is the steam used for?
This steam is an important part in electrical generation since it can be used to spin a turbine (which is connected to a generator to create power). When high pressure steam passes through the turbines it expands and emerges at an increased speed but lower pressure.
What is the purpose of reheating steam in a turbine system?
The purpose of a reheating cycle is to remove the moisture carried by the steam at the final stages of the expansion process. In this variation, two turbines work in series. The first accepts vapor from the boiler at high pressure.
What is steam turbine efficiency?
Isentropic steam turbine efficiency refers to the ratio of power actually generated from the turbine to what would be generated by a perfect turbine with no internal flowpath losses using steam at the same inlet conditions and discharging to the same downstream pressure.
What is the advantage of using steam in power plants and in process industries?
Steam is easy to control The energy in steam can be managed by controlling the pressure and temperature. With the right steam equipment, you can easily manage and control the amount of energy you need for your processes.
What is meant by steam turbine?
A steam turbine is a device that extracts thermal energy from the steam and converts it to mechanical work on a rotating output shaft.
What are main components of steam turbine?
rotor
The main parts of a steam turbine are (1) the rotor that carries the blading to convert the thermal energy of the steam into the rotary motion of the shaft, (2) the casing, inside of which the rotor turns, that serves as a pressure vessel for containing the steam (it also accommodates fixed nozzle passages or stator …
What is the purpose of reheating?
The main purpose of reheating is to avoid excess moisture and to increase the quality of steam at the end section of turbine.
What are steam turbines used for?
Steam turbines are used to transfer energy to drive a machine. They are used to create electricity from various energy sources that produce the raw material steam. These energy sources include fossil fuel, nuclear energy, geothermal energy and even solar power. Steam turbines have also been used to power locomotives and ships.
What are the components of a steam turbine?
The main components of a thermal/steam power plant are: Pump, boiler, steam turbine, condenser and generator.
What is the efficiency of steam turbine?
Condensing steam turbines have an efficiency in the range ηe = 36 to 42\%. From this it follows that only a small portion of heat released in the process of fuel combustion is transformed into effective work. Turbine units for power and steam generation have higher overall efficiency.
What is steam powered turbine?
Steam can be used to power a steam turbine generator, which produces electricity. Steam is created inside the turbine generator system, usually from an outside heating source. The list of heating sources could include nuclear heating, coal and fossil fuel heating, or concentrated solar heating.