Steam engines
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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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