The nozzles are fitted to the casing and the blades are keyed to the turbine shaft. More related questions on power plant engineering in ee. Different types of impulse stages.
PPT TURBOMACHINES Chapter 7 STEAM TURBINES PowerPoint
Rateau 4 condensing turbine 5 required condition 6 normal rated 7 steam flow available ton/hr 51 8 n rpm 6000 9 pi bar a 42 10 ti c 400 11 po bar a 0.12 12 13 steam data
Construction of the most important turbine.
Different types of reaction stages. The pressure compounded impulse turbine is also called as rateau turbine, after its inventor. In his design the rotors were separated by diaphragms which contained the nozzles. In particular, curtis design prioritizes lower rotor tip diameters by reducing stage work over aerodynamic performance.
Rateau stage is a simple impulse stage, which is one set of nozzles and one row of moving blades.
A.velocity compounded impulse stage, a pressure compounded impulse stage and a reaction stage. In this type, the total pressure drop of the steam does not take place in the first nozzle ring but is divided up between all the nozzle rings. Temperature, pressure, velocity and flow angles were measured in 6 different planes along the turbine annulus for different rotational speeds. Optimum performance is achieved when the redirecting action of the blade causes the steam to come to a complete stop, with all of the kinetic energy of the steam jet transferred to.
V is the nearest to requirement point.
Considering a first working gas turbine showed up in 1937, it would be clear why such names. Finding application in areas where back pressure steam is fully utilized, the power generation is. In this type, the total pressure drop of the steam does not take place in the first nozzle ring but is divided up between all the nozzle rings. The expansion of steam in a nozzle follows.
Molliers table for saturated steam.
When steam is extracted only from the first stage of steam turbine. Diagram of a rateau turbine pressure compounding is the method in which pressure in a steam turbine is made to drop in a number of stages rather than in a single nozzle. Comment * related questions on steam boilers, engines, nozzles and turbines. In this type, the total pressure drop of the steam does not take place in the first nozzle ring, but is divided up between all the nozzle rings.
Rateau steam turbine is a) reaction steam turbine b) velocity compounded impulse steam turbine c) pressure compounded impulse steam turbine d) pressure velocity compounded steam turbine.
Designation quantity note and additional information 1 2 turbine type rateau+reaction 3 control stage : Steam turbine calculation sheet page : A simple impulse stage, a velocity compounded impulse stage and reaction stage. A rateau stage uses only a single row of moving blades (one row of buckets per stage).
In this type, the total pressure drop of the steam does not take place in the first nozzle ring, but is divided up between all the nozzle rings.
Curtis stage is a velocity compounded impulse turbine, rateau stage is pressure compounded impulse turbine. He restricted the expansion of steam to the nozzles but used larger pressure drops per stage. For a curtis stage, it follows the second ro w of rotating blades. The many stage impulse turbine.
• it is called rateau turbine.
Turbine can be operated at 8,000 rpm and δhstg = 100 kj/kg. A rateau stage on a turbine is how many sets of nozzles and rows of moving blades? A curtis stage, rateau stage and a 50% reaction stage in a steam turbine are examples of. In the case of a rateau stage, it follows the first row of rotating blades.
Curtis stages are most commonly used in single stage machines where efficiency is not important and as control stages, or the first stage of the turbine followed by either rateau
Available steam is equal to example 3 above but for 5,000 kw of rateau turbine. One might consider it the inlet p ressure to the second stage. Monitoring this pressure tells us several things. From figure 10 shows that for 5,000 kw, typical no.
Rateau is credited with the invention of the pressure stage impulse turbine.
The many stage reaction turbine. Both rateau and curtis designs aim for a better balance of turbine work to be done moving the reaction design (parsons) to lp stages. This method of compounding is used in rateau and zoelly turbines. It consists of alternate rings of nozzles and turbine blades.
Turbine has number of stages for approximately of 600/100 = 6 stages.
