Following figures show steam process in steam turbine. Sinan karakurt, yasin ust department of naval arch and marine eng. Sep 06, 2017 steam turbine repair time lapse video duration. The steam turbine, 1911 fig 22 section of highpressure ahead marine turbine. In order to maintain the synchronous speed under changing loadgrid or steam conditions, the kwu turbine supplied by bhel at ntpc korba. The object of the analysis is the combined gas turbine steam turbine system which is compared to the combined marine lowspeed diesel engine steam turbine system. Exergy analysis of the main propulsion steam turbine from marine propulsion plant.
Steam turbine design marine steam turbines the steam. With the latest reheatregenerative cycle systems and stateofthe art technologies to improve plant efficiency, our ultra steam turbine plant ust delivers the best economic and environmental performance to all customers. Marine turbine engines have mostly been replaced by large two stroke diesel engines as a means of ships propulsion. The section on the marine steam turbine examines steam conditions and presentday conformations of propulsion units. In principle they are far simpler than cylinder engines, steam being merely directed at a suitable angle on to specially shaped vanes attached to a revolving drum and shaft. This article focuses on marine steam turbines and their applications. Pdf gas turbine engines offer a wide range of power in relatively small sizes and are used in a variety of power generation purposes including marine. Langston, university of connecticut and george opdyke, jr. Latest technologies and future prospects for a new steam turbine. Nevertheless modern steam turbines are very efficient and operate with internal efficiencies within the range of 80 percent to 90 percent depending upon the steam conditions. It is not mechanically connected to the gas generator, but instead is mechanically coupled, 1. How to start and parallel a marine steam turbine generator.
The superheated steam enters the high pressure hp stage the astern turbine is on the same shaft and. The invention of parsons steam turbine made cheap and plentiful electricity possible and revolutionized marine transport and naval warfare. Skrotzki and vopat, steam and gas turbines, mcgrawhill. The ge frame 5 is a single and twinshaft, simplecycle, axialflow, heavyduty. There is a small transport delay tcr, associated with the combustion reaction time, a time lag tcd. Therefore, even at 200 psia, when water turns into steam, its volume increases by about 14 times. Introduction to gas turbines for nonengineers published in the global gas turbine news, volume 37. The severe difference between hp turbine inlet steam temperature and lp turbine inlet steam temperature. Engineering students, young engineers and officers of. For the specific service of boiler feed water pump drive in thermal power plants, fincantieri has.
Beyond the turbine end of the gas generator is a freely rotating turbine. The company was founded by charles algernon parsons in 1897 with. Combined gas and steam turbine as prime mover in marine applications. Pdf exergy analysis of the main propulsion steam turbine. Marine, steam engines, and turbines isbn 9780408003872 pdf. Turbine marine 1mw compact series generator duration. A practical illustrated description of the parsons. That is, the ust turbine requires both start and stop operations within one voyage and the hpip turbine casing in particular is subjected to repeated thermal loads. Maintenance and overhaul of steam turbines wgp42 05.
Jun 24, 2015 in the second part of this series, the author talked about the story of the first little toy turbine. The modern steam turbine was invented in 1884 by charles parsons, whose first model was connected to a dynamo that generated 7. Combined gas and steam turbine as prime mover in marine. You can see that if you can use the cold seawater as the lowest temperature, say 60 f, the. Steam and gas turbines for marine propulsion sage journals. Definition a steam turbine is a prime mover in which the potential energy of the steam is transformed into kinetic energy and later in its turn is transformed into the mechanical energy of rotation of the turbine shaft. There are two classical types of turbine stage designs. Steam engineering basics 3 when considering the volume of a pound of steam, consider that a pound of water has a volume of only 0.
The comparison refers to the additional power and efficiency increase resulting from the use of the heat in the exhaust gas leaving the piston engine or the gas turbine. The text is recommended for marine engineers who would like to know more about how steam turbines and engines work. Parsons marine steam turbine company was a british engineering company based in wallsend, north east england, on the river tyne. Hhi, as a worldwide leader in the fields of producing integrated heavy industrial machinery, has produced various steam turbines for thermal power plants. Pdf portable document format pdf 68 care and maintenance. Block diagram of the fuel system the compressor turbine is the heart of the microturbine and is essentially a linear, nondynamic device with the exception of the rotor time constant. Development of high efficiency marine propulsion plant ultra. The usual steam conditions for propulsion turbines for merchant ships, having power outputs in the region of 10,000. In recent years combined systems consisting of a gas turbine and a steam turbine have started to be used as marine propulsion systems. Exergy analysis of the main propulsion steam turbine from marine propulsion plant article pdf available in brodogradnja 701. Marine steam turbines as a m ain engine can be classified in two groups. Steam turbines, whether small scale or heavyduty, are crucial for efficient power plants. Applications of steam turbines power generation transport 4. Abstract the gas turbines areknown to have good efficiency when used in combined cycle.
Aeg marine steam turbine rankin kennedy, modern engines, vol vi. Kwu steam turbine governing system steam turbine x 4 mw htps governing system presentation. This was mainly because of the great difference in fuel consumption, even modern oilfired steam boilers consumption was up to 30% more than that of todays big diesels. The selection also covers special turbines and engines. Lets find out how steam turbines work in the context of marine turbine engines. Steam turbines hyundai marine engines pdf catalogs. In noncondensing turbines or backpressure turbines, steam exhausts at a pressure greater than. A turbine stage normally consists of a row of stationary blading and a row of rotating blading. Ge power has supplied 30% of the worlds steam turbine capacity. A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into rotary motion.
The first is steam tu rbines with reduction gears or turbo alternatorg enerator and the second is steam turbine as a main. All end pressure from the steam was balanced by the two equal series on each side of the inlet, and the revolving. 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. Parsons main thrust for the steam turbine was for generating electrical power, but he also had his eyes on applying the steam turbine to drive ships of all kinds. Micro turbine generation using simulink 99 figure 6. Scheel, gas and air compression machinery, mcgrawhill. Purchase marine, steam engines, and turbines 4th edition. Model steam turbines steam turbines have come very much to the fore during recent years, especially for marine propulsion. Pdf steam turbines generally were used as a main engine in several kinds of ships which need more power to propel during 1800s and the mid of the.
Marine turbine engines how does a steam turbine work on. Comparing combined gas tubrinesteam turbine and marine low. Figure 4 shows steam process in enthalpy against entropy diagram of curtis and single row rateau turbine. It has almost completely replaced the reciprocating piston steam engine primarily because of its greater thermal efficiency and higher powertoweight ratio. Pdf exergy analysis of the main propulsion steam turbine from. Steam process in steam turbine steam entrance to turbine through governor valv e to control steam capacity and therefore to control turbine speed.