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d351235422 Archived from the original on May 27, 2010. The basic components of Boiler are: - Furnace and Burners Steam and Superheating a. Kindly update the same at your website. Seal oil is used to prevent the hydrogen gas leakage to atmosphere. Increasing the velocity of the steam by means of a flared nozzle output orifice may seem counter-intuitive since water flows faster through a constricted part of a stream or a pipe and squeezing the end of a hosepipe causes the water to squirt out in a long, fast jet. This permits the use of very high steam pressures and velocities enabling very high turbine power outputs Pressure Compounding Pressure compounding uses a series of reaction turbine stages to solve the problem of very high blade velocity in the single-stage impulse turbines. Uncontrolled runaway is prevented by controls on the fuel supply line which limit the amount of fuel fed to the turbine thus limiting its speed. The steam pressure drops across each stage as it gives up its pressure energy while the steam velocity remains fairly constant, changing direction as it passes through each stage. Steam and hot water.
However, at times, manual intervention may be required. Super critical designs have efficiencies in the low to mid 40% range, with new "ultra critical" designs using pressures of 4400 psi (30.3 MPa) and multiple stage reheat reaching about 48% efficiency. SUMIT KUMAR please? Reply SUMIT KUMAR says: February 17, 2011 at 9:25 AM sumit.pslive.in, sumitindianpowersector.com Reply deepakkr1973yahoo.com says: January 22, 2011 at 7:20 PM ntpc rajghat close date is 15 june 2011 Is is true . Turbine Configurations. There will be losses due to impurities in the fuel, incomplete combustion and heat and pressure losses in the combustion chamber and boiler. Generally in modern boilers tangential firing system is used i.e. The Steam Turbine as a Heat Engine Steam turbine systems are essentially heat engines for converting heat energy into mechanical energy by alternately vaporising and condensing a working fluid in a process in a closed system known as the Rankine cycle. Image Copyright - Science Museum/Science & Society Picture Library Steam Turbine Working Principles High pressure steam is fed through a set of fixed nozzles in the turbine stator to the turbine rotor (runner) and passes along the machine axis through multiple rows of alternately fixed and moving blades. If the condenser can be made cooler, the pressure of the exhaust steam is reduced and efficiency of thecycleincreases.The functions of a condenser are:- 1) To provide lowest economic heat rejection temperature for steam.