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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

Steam Engines

By: Michael May

introduction
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
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
watts engine
Watts Engine
  • James Watt
  • 75% less coal than Newcomen’s engine
  • Allowed factories to move away from rivers
  • Accelerated the industrial revolution
pressure steam engines
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
components
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.
how they work
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
reference
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
questions

Questions?

Michael May

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