steam engine presentation by mohd.mufeed

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Presentation On Steam Engine By: Mohd.Mufeed.School Of Mechanical Engineering

Content. Introduced to Steam EngineHistory Of Steam Engine Working principal of Steam EngineMain Part of Steam EngineExamples of Steam EngineAdvantage/Disadvantage Of steam Engine

History of Steam Engine Inventors used experimental devices, such as the rudimentary steam turbine device described by Taqi al-Din in 1551 and Giovanni Branca in 1629, to demonstrate the properties of steam. The first practical steam-powered 'engine' was a water pump, developed in 1698 by Thomas Savery. It proved only to have a limited lift height and was prone to boiler explosions, but it still received some use for mines and pumping stations. The first commercially successful engine, the atmospheric engine, invented by Thomas Newcomen did not appear until 1712. Newcomen's engine was relatively inefficient, and in most cases was only used for pumping water.

Steam Engine Diagram..

Examples of steam Engine Road Rollers Showmans Road Locomotives Portable Engine Steam Tractors Trains

Disadvantegs of Steam Engine1.A steam engine is huge and heavy. (That is, An external combustion engine is huge and heavy). Due to its big boiler and furnace a steam engine is huge, heavy and clumsy. Since the boiler of a steam engine is very heavy, therefore, a steam engine cannot be used for running small vehicles like cars and buses.2.A steam engine does not start at once. (That is, An external combustion engine does not start at once). Before a steam engine can start, we have to build a coal fire to get steam. This process takes a long time and hence a steam engine cannot be started at a moments notice.

3.A steam engine is unsafe to use. (That is, An external combustion engine is unsafe to use). A steam engine is not very safe to use because its boiler can burst due to excessive steam pressure. In order to get the maximum work from the heat energy, the steam has to be maintained at high temperature and a very high pressure in the boiler.4.A steam engine has low efficiency. (That is, An external combustion engine has low efficiency). The thermal efficiency of a steam engine is about 20 per cent which means that a steam engine can convert only about 20 per cent of the heat energy into work.

Advantage Of Steam Engine1.A steam engine (or external combustion engine) could be located anywhere because water is heated in a separate boiler to produce steam. The steam engine, with its boiler, could be taken to any place of work. On the other hand, blowing wind or flowing water is not available everywhere to run the wind mills or water mills.2.A steam engine (or external combustion engine) can be used at any time because steam can be produced at any time. On the other hand, a wind-mill or water-mill can be used only when wind and flowing water are available.3.A steam engine (or external combustion engine) can be used to run trains for going from one place to another but wind-mills and water-mills cannot be used for this purpose.

4.A steam engine (or external combustion engine) is much more powerful than a wind-mill or water-mill.5. A steam engine (or external combustion engine) can use virtually any combustible material for fuel-wood, coal, oil, old furniture, anything that can be put into the firebox. This makes it a very flexible source of power since anything in the vicinity can be used.

Reference.

Steam EngineHeat engine that converts heat to work.Required components:Fuel as source of heat (e.g. wood, coal, gas, solar, nuclear)Working fluid (e.g. water)Closed cycle including compressor and expansion unitMechanical part to do work (e.g. turbine)

Steam Engine

Sliding valve

Steam enters chamber fromleft, leaving from right

both valves closed, piston moves to the right

Steam enters from right,leaving from leftpiston moves back to the left