These help to speed up and direct the steam onto the rotating blades at just the right angle, before the steam dissipates with reduced temperature and pressure. A turbinegenerator can often produce enough electricity to justify the capital cost of. For example, a steam turbine extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating shaft. Zet je pdfs naar powerpoint presentaties om gratis en makkelijk in gebruik. There are two general types of steam turbine designs one type is called an impulse turbine.
For small units without reheat, the steam turbine may consist of a single turbine when the steam expanding through the turbine exhausts to a condenser or a process line. Saravanamuttoo encyclopedia of life support systems eolss 1. If so, share your ppt presentation slides online with powershow. See more ideas about steam turbine, abandoned factory and industrial photography. The importance of this method is, the turbine can maintain a constant steady speed irrespective of variation of its load.
Gas turbine for power generation market size this study presents the gas turbine for power generation production, revenue, market share and growth rate for each key company, and also covers the breakdown data production, consumption, revenue and market share by regions, type and applications. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. This system generates electricity by using the main steam system to drive a turbine generator unit. Working principle of steam turbine depends on the dynamic action of steam. Impulse turbines an impulse turbine uses the impact force of the steam jet on the blades to turn the shaft. Drop in steam pressure and increase in steam velocity the effect of this change produces an impulse force in the blade causing it to move. The energy to rotate an impulse turbine is derived from the kinetic energy of the steam flowing through the nozzle. Unlike with reciprocating engines, for instance, compression, heating and expansion are continuous and. Prepared by mohammad shoeb siddiqui senior shift supervisor steam turbine components and relative equipments steam turbine speed control the speeder gear of a turbine governor in order to maintain the system frequency constant and at the same time allow load variation to occur, it is necessary to be able to compensate for the loss of speed. The generator connected to the shaft takes the mechanical energy produced by the turbine and converts it to electrical energy through the use of electromagnetic induction.
For a large unit without reheat, the steam may expand through an initial section and then exhaust to a condenser or to a process. Condensate entrapment in the steam supply increases turbine steam rates, reduces the steam turbine efficiency, and causes erosion of steam turbine components governor valves, blading, and nozzles. The basic element in a turbine is a wheel or rotor with addles, propellers, blades, or buckets arranged on its circumference in such a fashion that the moving fluid exerts a tangential force that turns the wheel. Lathrop trotter is the source for gas and steam turbines, turbine generator sets, and combined heat and power solutions. A turbine generator can often produce enough electricity to justify the capital cost of. If you are looking this types pdf you can download it for your course. Steam consumption steam consumption of steam turbine is depending to required output power and efficiency of the turbine.
We work to assess and address specific application needs so we can specify and develop a turbine system package that meets and exceeds goals and expectations, and offers flexibility for future needs. There may be two or more rings of moving blades keyed to a common. The following addresses best practices for optimal steam system turbine maintenance and operation. Despite efforts to develop alternative energy converters, electricity from steam will continue, for many years, to provide the power that energizes the united states and world economies. Best practices for steam turbine maintenance and operation. Introduction the first successful application of the gas turbine for electricity generation was the 4 mw plant installed by brown boveri in neuchatel, switzerland, in. Uncontrolled acceleration of the turbine rotor cam lead to an over speed trip, which causes the nozzle valves that control the flow of steam to the turbine to close. Abb offers a comprehensive suite of steam turbine automation solutions, regardless of the turbine oem, for applications ranging from a 100 kw single stage turbine to a 1200 mw nuclear power plant turbine. Pdf power plant lecture notes chapter3 steam generator. Two steam generators produce steam from the heat energy generated by the reactor to supply the turbine for the main steam system.
Ppt gas turbine powerpoint presentation free to download. Therefore, in order to restrict the rotational speed of the turbine and also to minimiz the leaving loss, the exhaust steam from the first ring of moving blades is diverted to a second ring of moving blades with the help of a ring of stationary blades. Steam turbines are ideal wherever steam is available. Steam turbine working principle and types of steam turbine. In this type of steam turbine the rotor spins due to. The motive power in a steam turbine is obtained by the rate of change in momentum of a high velocity jet of steam impinging on a curved blade which is free to. Powerpoint presentation on steam turbine powerpoint. Therefore, even at 200 psia, when water turns into steam, its volume increases by about 14 times. Archived from the original pdf on 28 september 2011. A highvelocity steam is coming from the nozzles and it strikes the rotating blades which are fitted on a disc mounted on a shaft. Unesco eolss sample chapters thermal power plants vol. Improving the energy efficiency of our manufacturing facilities, buildings, and.
Above 600 rpm rotor relative vibrations should be monitored. Let us look at turbines first and there are two types of turbines a. The earliest patent on gas turbine was that of the englishman, john barber, in year 1879. Steam turbine powerpoint free download as powerpoint presentation. A turbine is a device which converts the heat energy of steam into the kinetic.
Steam quality steam must be of the highest quality. Steam turbine a steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into useful mechanical work. Geen watermerken, geen limiet omvormen van pdf naar ppt in seconden. E book for steam turbine fundamentals of steam turbine. Uncontrolled acceleration of the turbine rotor cam lead to an over speed trip, which causes the nozzle valves that. Leavingvelocity and exhaust loss in steam turbines by ernest l. The first steam turbine used for power generation was invented in 1884. A free powerpoint ppt presentation displayed as a flash slide show on id. Definition a steam turbine is a mechanical device that extracts thermal energy from pressurized a free powerpoint ppt presentation displayed as a flash.
Steam power plant ppt steam power plant presentations. In a reaction turbine, there is a second set of stationary blades attached to the inside of the turbine case. Consider installing highpressure boilers with backpressure turbinegenerators when specifying a new boiler, consider a highpressure boiler with a backpressure steam turbinegenerator placed between the boiler and the steam distribution network. The control of turbine with a governor is essential. Due to the pressure drop across the moving blades, an unbalanced thrust will be developed upon the rotor and some arrangement must be made to balance this. Steam turbines are one of the most versatile and oldest prime mover technologies still in general production used to drive a generator or mechanical machinery. Steam expands as it passes through the nozzles, where its pressure drops and its. The real values of critical speeds should be measured at. Approval issue module 2347 the turbine governing system. Ppt steam turbines powerpoint presentation free to. The highpressure turbines are modelled for a design situation and for partload situations with 80% and 40% of the power at design situation. Definition a steam turbine is a mechanical device that extracts thermal energy from pressurized.
This paper gives an exposition of the various items which go to make up the leaving velocity and exhaust loss of a steam turbine. Both use a fluid of gous nature at high temperature at high pressure to generate power. The turbine has seven bleeder connections for regenerative feed. Ingvar jung, 1979, the history of the marine turbine. See more ideas about steam turbine, abandoned factory and. Reaction turbine blading and conditions figure 3 shows, at the top, the end view of four stages of fixed and moving blades of an. In an extracting type turbine, steam is released from variousin an extracting type turbine, steam is released from various stages of the turbine, and used for industrial process needs or sentstages of the turbine, and used for industrial process needs or sent to boiler feed water heater to. In general, a steam turbine is a rotary heat engine that converts thermal energy contained in the steam to mechanical energy or to electrical energy. Chapter 10, steam and power conversion, describes the steam and power conversion system for the ap design. Steam turbinegenerator overhaul and inspection guidelines. Mhi has developed new high performance turbine blades reaction blades, impulse blades, and lp end blades and high. Efficiency will depend on turbine size or rotor diameter, blade geometries, speed, extreme condition of steam and other losses.
This highvelocity steam produces dynamic pressure on the blades in which blades and shaft both start to rotate in the same direction. One the threshold is exceeded, automatic trip of turbine takes place. Our capability in the areas of mechanicalhydraulic design. The initial turbine is designated as the highpressure hp turbine and. Key global player in steam turbines industry with market leadership position in india, having over 60% market share. In its simplest form, a steam turbine consist of a boiler steam generator, turbine, condenser, feed pump and a variety of auxiliary devices. Pdf power plant lecture notes chapter4 steam turbine.
Steam turbine governing system is a method, used to maintain a constant steady speed of turbine. Introduction the first successful application of the gas turbine for electricity generation was the 4. Turbines in ohio, kentucky and indiana lathrop trotter. Operation and maintenance schedule of a steam turbine plant. Consider installing highpressure boilers with backpressure. Operation and maintenance schedule of a steam turbine. Because of large initial pressure drop, the steam and turbine speeds are very high because of gradual pressure drop, the steam and turbine speeds are low. Scribd is the worlds largest social reading and publishing site. The exhaust pressure from the turbine is less than the atmospheric. Chaplin encyclopedia of life support systems eolss figure 4. Consider installing highpressure boilers with backpressure turbine generators when specifying a new boiler, consider a highpressure boiler with a backpressure steam turbine generator placed between the boiler and the steam distribution network.