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Steam Engines

Steam Engines. By: Michael May. Introduction. A heat engine that uses steam to perform mechanical work Uses: Stationary: rotary motion to power machinery in places such as factories Transport: Steamboat, steam locomotive, steam tractor, steam car, steam shovel, etc. History.

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Steam Engines

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  1. Steam Engines By: Michael May

  2. Introduction • A heat engine that uses steam to perform mechanical work • Uses: • Stationary: rotary motion to power machinery in places such as factories • Transport: Steamboat, steam locomotive, steam tractor, steam car, steam shovel, etc.

  3. History • first practical steam-powered engine was a water pump • Thomas Savery 1698 • first commercially successful engine • Atmospheric engine, Thomas Newcomen 1712 • Paved way for industrial revolution • Only pumped water, not efficient • Used to drain mines

  4. Watts Engine • James Watt • 75% less coal than Newcomen’s engine • Allowed factories to move away from rivers • Accelerated the industrial revolution

  5. Pressure Steam Engines • 1800 by Richard Trevithick • Much more powerful • Relied on high-pressure steam rather than a vacuum. • Dominant source of power well into the 20th century

  6. Components • Two major components • Boiler • Pressure vessels that contain water to be boiled • Mechanisms to transfer heat to water • Water tube boiler • Fire tube boiler • Motor • takes a supply of steam at high pressure and temperature and gives out a supply of steam at lower pressure and temperature • difference in steam energy to do mechanical work.

  7. How They Work • Fuel is burned in a firebox to obtain heat • Heat is transferred to water in a pressurized boiler to produce steam • Steam is transferred to the motor unit which drives pistons or turbines to power machinery or generators • Used, cooler air is exhausted

  8. Reference • http://en.wikipedia.org/wiki/Steam_engine • http://images.google.com/images?hl=en&q=steam+engine&gbv=2 • http://inventors.about.com/library/inventors/blsteamengine.htm • http://www.howstuffworks.com/steam.htm

  9. Questions? Michael May

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