Back pressure turbine pdf merge

A steam backpressure turbine is a device that converts the thermal energy of steam into mechanical work. In other words, exhaust steam pressure is set to be the demanded pressure from the facility needs or outside needs. In a steam turbine the inlet and exhaust pressures and the inlet temperature of. Pdf power is very vital factor for development of any society. Blade vibration triggered by low load and high back pressure article in engineering failure analysis 46. An extractioncondensing type of steam turbine can be used in combined. The high pressure steam enters the back pressure steam turbine and while the steam expands part of its thermal energy is converted into mechanical energy. I peeped in the pdf, and i think, concerning the efficiencies stated.

Steam passes through pressure reducing valves prvs, also known as letdown valves at various locations in the steam distribution system to let down or reduce its pressure. Pdf energy and exergy analysis of extraction cum back pressure. Blade vibration triggered by low load and high back pressure. However, from a technological point of view, condensing and back. Generally, midsize and bigsize chp plant in korea generate electricity from gas turbine and steam turbine, then supply heat from exhaust gas. Difference between condensing turbine and back pressure.

Steam turbine cogeneration systems involve different types of configurations with. The back pressure turbine is used for supplying process steam to the facilities in privateuse power producers. Replace pressure reducing valves with backpressure turbogenerators many industrial facilities produce steam at a pressure higher than that demanded by process requirements. Back pressure steam turbines can either be used for drive application sugar mill drives, sugar fibrizor shredder drive, pump drives and so on or power generation application in which case the. The noncondensing steam turbine uses high pressure steam for the rotation of blades.

Energy and exergy analysis of extraction cum back pressure steam. They are implemented by combining various levels of renewable and chp. Energy and exergy analysis of extraction cum back pressure steam turbine. Most of the times, relatively higher pressure is generated, transported and finally the pressure is reduced before use. There are many occasions where low pressure steam is used. The ability to combine standardized casing modules enable. It is also selected when no high pressure steam is available.

Steam turbine shaft efficiencies vs dry saturated exhaust. This type of steam turbine supplies not only electricity but also the process steam to the facilities. Back pressure steam turbine is also called as non condensing steam turbine is mostly used in process steam industries or cogeneration plants. Back pressure turbine an overview sciencedirect topics.

Performance analysis on chp plant using back pressure turbine. Condensing turbine is selected when the steam demand for the process drivers is greater than the low pressure process steam requirements. Case study on the impact of cogeneration and thermal storage on. The back pressure turbine may also have bleed points uncontrolled extractions to satisfy steam demands at intermediate pressures, this provision is applicable when the bleed medium pressure steam volume demand is low and pressure variations can be tolerated. A steam turbine fundamentally consists of a rotor carrying blades, the casing in which the rotor turns, and the nozzles through which the steam is allowed to expand. Steam turbine portfolio overview digital asset management. These turbines are of bleed cum back pressure type.