Compounding of Steam Turbine
CHAPTER 1
INTRODUCTION
1.1 GENERAL
Steam Turbine is a type of turbo machine. Turbo machine are those devices in which energy is transferred either to or from, a continuously flowing fluid by the dynamic action of one or more moving blade rows. In steam turbine energy is transferred from fluid to blade rows and is decreasing along the flow directions. It is power producing thermodynamics device.
Steam turbine converts heat energy of steam (at high pressure and temperature) into mechanical energy. The so utilised can be used in various filed of industry such as electricity generation, transport, in driving of pumps, fan and compressor etc. the basic cycle on which steam turbine works is Rankine Cycle.
The reciprocating steam engine was still inefficient, cumbersome, had a very low power to weight ratio, and was a high maintenance piece of machinery. The development of the steam turbine was a vast improvement in all of these respects.
A turbine consist of one set of stationary blades or nozzles and an adjacent set of moving blades or buckets. These stationary and rotating elements act together to allow the steam flow to do work on the rotor. The ork is transmitted to the load through the shaft or shafts.
Figure 1.1 Block diagram of a Turbine
1.2 HISTORY
Steam turbines date back to 120 B.C. when the first steam turbine was developed by Hero of Alexandria. Subsequently number of steam turbines came up but the practically successful steam turbine appeared at the end of nineteenth century when Gustaf De Laval designed a high speed turbine built on the principle of reaction turbine in 1883. Before this in 1629 G. Branca developed the first impulse turbine. Branca’s impulse turbine and Hero’s reaction turbine are shown in Fig. 1.1.
Figure 1.2 Hero and Branca’s turbine.
In nineteenth century some more steam turbines were developed by Sir Charles A. Parsons and C.G. Curtis which gave a filip to the development to the
INTRODUCTION
1.1 GENERAL
Steam Turbine is a type of turbo machine. Turbo machine are those devices in which energy is transferred either to or from, a continuously flowing fluid by the dynamic action of one or more moving blade rows. In steam turbine energy is transferred from fluid to blade rows and is decreasing along the flow directions. It is power producing thermodynamics device.
Steam turbine converts heat energy of steam (at high pressure and temperature) into mechanical energy. The so utilised can be used in various filed of industry such as electricity generation, transport, in driving of pumps, fan and compressor etc. the basic cycle on which steam turbine works is Rankine Cycle.
The reciprocating steam engine was still inefficient, cumbersome, had a very low power to weight ratio, and was a high maintenance piece of machinery. The development of the steam turbine was a vast improvement in all of these respects.
A turbine consist of one set of stationary blades or nozzles and an adjacent set of moving blades or buckets. These stationary and rotating elements act together to allow the steam flow to do work on the rotor. The ork is transmitted to the load through the shaft or shafts.
Figure 1.1 Block diagram of a Turbine
1.2 HISTORY
Steam turbines date back to 120 B.C. when the first steam turbine was developed by Hero of Alexandria. Subsequently number of steam turbines came up but the practically successful steam turbine appeared at the end of nineteenth century when Gustaf De Laval designed a high speed turbine built on the principle of reaction turbine in 1883. Before this in 1629 G. Branca developed the first impulse turbine. Branca’s impulse turbine and Hero’s reaction turbine are shown in Fig. 1.1.
Figure 1.2 Hero and Branca’s turbine.
In nineteenth century some more steam turbines were developed by Sir Charles A. Parsons and C.G. Curtis which gave a filip to the development to the
References: * Emmet, W.L.R., The Curtis Steam Turbine, Proceedings of the American Philosophical Society, Vol. 42, No. 172 (Jan. - Apr., 1903), page no-68-84. * El-Wakil M. M., Powerplant Technology, Tata Mcgraw Hill Educaition Private Limited, New Delhi, 2010. * http://www.seminarslides.com/ppt/STEAMTURBINE/mail/#sthash.1MYrM5zW.dpuf * Venkanna, B.K., Fundamentals of Turbomachinery, PHI Learning Private Limited, New Delhi, 2011. * Yadav, R., Applied Thermodynamics, Central Publishing House, Allahabad, 2006. * Yahya S. M., Turbines, Compressors and Fans (Fourth Edition), Tata Mcgraw Hill Educaition Private Limited, New Delhi, 2011.