Low pressure steam turbine pdf

Heat may be recovered from the condensed water to heat combustion air before the water is returned to the boiler and recycled. Steam turbines are available in sizes from under 100 kw to over 250 mw. Power plant lecture notes chapter2 steam power plant cycles. Such facilities can also use steam in absorption chillers to produce chilled water for air conditioning. For low and moderate inlet steam pressure up to 120 bar, a. In these cases, the steam turbine generates electricity using the higher pressure steam, and discharges low pressure steam into the distribution system. Steam exiting the lowpressure turbines is condensed at as low a pressure as can be achieved in order to gain the maximum energy from the steam. Most of nuclear power plants operates a singleshaft turbine generator that consists of one multistage hp turbine and three parallel multistage lp turbines, a main generator and an exciter each lp turbine low pressure turbine is usually doubleflow reaction turbine with about 58 stages with shrouded blades and with freestanding blades of last. Steam exiting the low pressure turbines is condensed at as low a pressure as can be achieved in order to gain the maximum energy from the steam. Chp configurations use backpressure or extraction steam turbines to. Steam power h 1 h 2 x steam flow ratec 1 shaft power steam power minus mechanical losses journal and thrust bearings warning the cooling water temperature rise is very low, so accurate temperature measures are critical for reliable results.

Combined heat and power technology fact sheets series. Special notes for extraction steam turbines high pressure section. Lowpressure turbine an overview sciencedirect topics. Steam turbine basic parts mechanical engineering site. Pdf on mar 7, 2005, lutz volker and others published the flow field and performance of a model low pressure steam turbine find, read. Pdf power plant lecture notes chapter2 steam power. Pdf evaluating the efficiency of low pressure part of steam. The low pressure turbines of a typical power plant cycle are condens ing turbines in that they exhaust to a steam surface condenser or to a direct condensing air. This was done with a special focus on the last stage low pressure turbine blades, for the reason. Pdf a methodology oflow pressure part turbine efficiency evaluation based on measurements of the steam flow parameters in the interspaces. Steam turbine rotor vibration that results in premature failure of blades and other components is one of the most serious problems in power plant operations. 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 20th century. The results showed that changing of flow field and performance of the first two.

Pdf the flow field and performance of a model low pressure. Combined heat and power technology fact sheet series. The inlet pressure at the turbine main steam valves reflects reactor power, steam line flow and pressure regulator pr ogramming, but never exceeds the pressure for which the turbine components and steam lines are designed. Lp turbine lowpressure steam turbine nuclear power. Microturbine systems that provide both cooling and heating can be used in a.