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Topic: Steam engine


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  Steam engine - Wikipedia, the free encyclopedia
Steam engines were used as the prime mover in pumps, locomotives, steam ships, traction engines, steam lorries and other road vehicles, and were essential to the Industrial Revolution.
Steam turbines, technically a type of steam engine, are still widely used for generating electricity, but older types have been almost entirely replaced by internal combustion engines and electric motors.
One of the advantages of the steam engine is that any heat source can be used to raise steam in the boiler; but the most common is a fire fueled by wood, coal or oil or the utilisation of the heat energy generated in a nuclear reactor.
en.wikipedia.org /wiki/Steam_engine   (5391 words)

  
 Steam Engine - MSN Encarta
Steam that is to be used for power or heating purposes is usually generated in a boiler.
By varying the point in the engine cycle at which steam is admitted to the cylinder, it is possible to vary the amount of compression and expansion in the cylinder and hence to vary the power output of the engine.
Further improvement in the design of steam engines is afforded by the uniflow engine, which uses the piston itself as a valve and in which all portions of the cylinder remain at approximately the same temperature when the engine is operating.
encarta.msn.com /encyclopedia_761554687/Steam_Engine.html   (1998 words)

  
 Newcomen steam engine - Wikipedia, the free encyclopedia
Thomas Newcomen's atmospheric engine, today referred to as a Newcomen steam engine (or simply Newcomen engine), was the first practical device to harness the power of steam to produce mechanical work.
Steam was then readmitted, driving the remains of the condensate out through a one way snifter valve as the process started all over again.
The common story is that in 1713 a boy named Humphrey Potter, whose duty it was to open and shut the valves of an engine he attended, made the engine self-acting by causing the beam itself to open and close the valves by suitable cords and catches (known as the "potter cord"[1]).
en.wikipedia.org /wiki/Newcomen_steam_engine   (1540 words)

  
 steam engine. The Columbia Encyclopedia, Sixth Edition. 2001-05
Steam is admitted through one inlet valve, forcing the piston to move to the other end of the cylinder.
A compounded steam engine has several cylinders, which the steam passes through successively until, leaving the last cylinder, it is condensed into water and returned to the boiler.
Now, however, steam engines have been replaced in most applications by more economical and efficient devices, e.g., the steam turbine, the electric motor, and the internal-combustion engine, including the diesel engine.
www.bartleby.com /65/st/steameng.html   (496 words)

  
 Steam engine terminology and operating principles
Like the more familiar car engine, a steam engine has a piston that moves when pressure is applied, and valves to control the intake and exhaust of the contents of the cylinder.
In a steam engine, the inlet valve opens, and steam under pressure pushes on the piston, until you open the exhaust valve to let it out.
Steam travels down the small pipe, and since the cylinder is sitting in the open, cooler air, the steam will condense back into a couple of droplets of water.
www.the-nerds.org /Steam-101.html   (2593 words)

  
 Green Steam Engine Home Page   (Site not responding. Last check: 2007-10-22)
A full size engine such as the one in the picture weighs as little as 5 lbs (less flywheel) yet produces ample power to run a boat or a generator.
Steam engines provide advantages such as: less pollution, quiet running, high torque at low speeds, no transmission requirements, runs on a choice of fuels, has long life with low maintenance.
The overall friction of the engine is reduced due to the small number of light weight moving parts, and the use of ball bearings throughout.
www.greensteamengine.com   (737 words)

  
 NOVA Online | Lincoln's Secret Weapon | Steam Machine
Steam engines, believe it or not, have been around for over 300 years.
In 1712 Thomas Newcomen built an engine that made use of a piston, and, beginning in 1769, James Watt improved on steam engine design with a string of patents that included innovations such as having steam push alternatively on both sides of a piston.
But it really wasn't until the advent of high-pressure steam engines, developed almost simultaneously in England and the U.S. in 1802, that the modern steam engine came to be.
www.pbs.org /wgbh/nova/monitor/engine.html   (182 words)

  
 History of the Steam Engine
Steam not flows into the opposite end of the cylinder forcing the piston to move backward.
The metal case surrounding the steam pipes was an early attempt at insulation.
By 1889 the steam driven turbine engine was being perfected and the fate of the piston engine sealed.
www.steamboats.com /museum/engineroom11.html   (1025 words)

  
 Steam Engines
His engine was introduced in 1712 and was basically a combination of the boiler used in Savery's engine with a cylinder and pump.
There was a boiler that produced the steam and a cock that allowed a jet of cold water to condense the steam and vary the pressure within the engine.
Watt ended up with the majority of the credit for the steam engine because all of the men before them were basically ahead of their time.
campus.udayton.edu /~hume/Steam/steam.htm   (3498 words)

  
 Halfbakery: internal combustion steam engine
The idea is this: in an ordinary engine, igniting the fuel in the cylinder causes expansion which moves the piston.
But the steam is produced outside the engine in a heat-exchanger by the hot exhaust gases as the engine is not cooled very much.
The steam cylinder is on the same crackshaft and kicks in with a bit of time lag compared to IC section.
www.halfbakery.com /idea/internal_20combustion_20steam_20engine   (6365 words)

  
 Steam Engine
The steam engine was invented by British engineer called Thomas Newcomen.
By doing this, it produces a vacuum by condensing the steam, so the atmospheric pressure on the upper side of this piston forces it downward, lifting the pump-rod by means of the beam.
Newcomen’s steam engine led to the development of high-pressure engines, Cornish engines, high speed engines and the uniflow engine which represents the final stage of the development of the steam engine.
library.advanced.org /16541/eng/learn/library/content/steam_engine.htm   (311 words)

  
 Inventor James Watt Biography
Watt determined the properties of steam, especially the relation of its density to its temperature and pressure, and designed a separate condensing chamber for the steam engine that prevented enormous losses of steam in the cylinder and enhanced the vacuum conditions.
The misconception that Watt was the actual inventor of the steam engine arose from the fundamental nature of his contributions to its development.
It follows the development of reciprocating steam engines, from their earliest forms to the beginning of the twentieth century when they were replaced by steam turbines.
www.ideafinder.com /history/inventors/watt.htm   (1394 words)

  
 Corliss Engine
The entire mill was run by these engines until remarkably recent times, owing in part to the nature of the mill, in that byproducts from the process was practical to burn as fuel to fire boilers.
Although he is not responsible for the invention of the steam engine, he is responsible for bringing the phenomena to Fairmount Park in 1876.
From what I have read, before the Corliss valve, steam engines were limited in size and horsepower output due to the fact that the steam condensed inside the piston, drawing heat from the engine, slowing it down and robbing it of power.
www.eng.mu.edu /corlissg/gc_engine.html   (1600 words)

  
 Smith College Museum of Ancient Inventions: Heron's Steam Engine   (Site not responding. Last check: 2007-10-22)
Steam Engine, Alexandria, 100 CE by Karen Fisher, 'AC Heron, the great inventor of Alexandria, described in detail what is thought to be the first working steam engine.
As the water boiled, steam rose into the pipes and into the hollow sphere.
The steam escaped from two bent outlet tubes on the ball, resulting in rotation of the ball.
www.smith.edu /hsc/museum/ancient_inventions/steamengine2.html   (127 words)

  
 No. 1085: The First American Steam Engine
In 1760 young John Adams wrote in his diary that he was struggling to understand the English "fire engines." That's what steam engines were called back before Watt.
The engine arrived five years later, in 1753, along with Hornblower's son, Josiah, and his crew.
Steam power had been a school exercise for Jefferson and Adams.
www.uh.edu /engines/epi1085.htm   (488 words)

  
 Background | Bourque Steam Engine
Even then, steam engines made sense in terms of quiet operation and low emissions, but needed a cycle that could deliver high efficiency and compact size with warm air cooling.
It seemed that, once I mentioned "steam engine", the old quaint stereotypes of big clunkers clicked into place; no one would listen to my detailed innovations that profoundly improved performance and reduced weight and size.
If diesels are ever saddled with emission controls, their efficiency would come down to about the same as my engine; but they would still be much heavier, noisy, and can be hard to start in cold weather.
www.newsteamengine.com /background.html   (712 words)

  
 Free Plans-Model Steam Engine
Also......observation of steam engines allowed early engineers to develop numerous scientific principles in such areas as statics, kinematics, thermodynamics and material science......these principles are still part of engineering education.
The term “steam engine”, as used here, means engines that operate on the general principles of conventional (traditional) piston-type steam engines.
A real steam engine, clattering and wheezing away at 500 RPM, is far more alive and interesting……and kids brought up on “computer-reality” often view “real-reality” as new and different (perhaps “reality” is the ultimate tool for downloading informational data……but somehow, I think a lot of us knew that already).
npmccabe.tripod.com /steam.htm   (1688 words)

  
 Howstuffworks "How Steam Engines Work"
Steam engines were the first engine type to see widespread use.
They were first invented by Thomas Newcomen in 1705, and James Watt (who we remember each time we talk about "60-watt light bulbs" and the such) made big improvements to steam engines in 1769.
Steam engines powered all early locomotives, steam boats and factories, and therefore acted as the foundation of the Industrial Revolution.
science.howstuffworks.com /steam.htm   (84 words)

  
 No. 28: The First American Steam Engine
In 1760 the young John Adams wrote in his diary that he was struggling to understand the English "fire engines," as steam engines were then called.
But the historian Carroll Pursell points out that our interest in steam engines was largely academic, because the real thing simply wasn't to be found in the colonies.
The early 18th-century use of steam engines in England was pretty well limited to keeping water out of the relatively deep British coal and metal mines.
www.uh.edu /engines/epi28.htm   (487 words)

  
 America's only steam and threshing enthusiast magazine: Steam Traction   (Site not responding. Last check: 2007-10-22)
Steam Traction, America's only steam and threshing enthusiast magazine, is dedicated to bringing readers the best stories and photographs of steam's past and present.
With articles on restorations, steam reunions and shows, and histories of the companies that forged steam's role in agricultural America, we bring readers what they want in every issue.
Steaming and threshing are more than a hobby, they're a community of active and dedicative enthusiasts committed to keeping a seminal piece of America's history alive.
www.steamtraction.com   (409 words)

  
 Rotary Steam Engine   (Site not responding. Last check: 2007-10-22)
The engine is made of 1/8 inch soft copper tubing.
As the steam continues to expand, it encounters the section of tubing that used to be full of water.
In the version shown, I have added an extra coil to the engine, but this is not necessary, and does not improve the engine.
www.engineering.com /content/ContentDisplay?contentId=41008011   (1136 words)

  
 Paper Steam Engine   (Site not responding. Last check: 2007-10-22)
This paper steam engine is based on his cad drawing of a Riches and Watts nominal 2 ½ horsepower vertical A-frame double acting simple slide-valve steam engine circa 1870-75.
The original engine was used to drive a water pump to irrigate the fields of Norfolk.
Everything will work on this engine, the flywheel turns, there really is a slide valve in the valve chest, the piston works, the cranks and the connecting rods, eccentric and strap all work if built carefully.
www.home.earthlink.net /~eellbee/steam2.html   (385 words)

  
 STEAM   (Site not responding. Last check: 2007-10-22)
The display consists of a boiler capable of supplying steam to two or three moderately small steam engines.
Steam is also supplied to the "steam table" where any member is invited to display and run toy steam engines or working models.
There is no "cab" because the engineer must sit on the tender when operating the engine.
www.oldengine.org /members/cmsgma/2002show/Steam.html   (151 words)

  
 Antique Engines - Harry's Old Engine - Gas Engine Steam Engines
Engine shows are represented from the Northeast, Southeast, Northwest, Southwest and Midwest.
There are hundreds of engine photos, many links to CLICK on and a selection of books that feature gasoline and stationary steam engines, antique tractors, steam locomotives and railroading.
The principles of gas engines and gas producer design, the selection and installation of an engine, conditions of perfect operation, producer gas engines and their possibilities, the care of gas engines and producer gas plants, with a chapter on volatile hydrocarbon and oil engines.
old-engine.com   (771 words)

  
 Steam Engine Library
A collection of historical documents relating to the history of the steam engine.
Dionysius Lardner, The Steam Engine Explained and Illustrated; with an account of its invention and progressive improvement, and its application to Navigation and Railways; including also a Memoir of Watt.
Trevithick was an early British pioneer of high pressure steam engines.
www.history.rochester.edu /steam   (1147 words)

  
 American Experience | The Time of the Lincolns | A Rising Nation
But at the beginning of the 19th century, a new source of power arrived: the steam engine.
Among the first to make a splash with the steam engine was Robert Fulton, who had built prototypes of a steamboat in Britain before testing his first American vessel on the Hudson in 1807.
Steam also found its way into factories, where it provided the power for the American Industrial Revolution.
www.pbs.org /wgbh/amex/lincolns/nation/gal_tech_2.html   (161 words)

  
 Steam Engine Kits
This engine is similar to those used to provide line shaft power to factories and mills in the 1800's.
It is a replica of a rare old steam engine sued for various small portable power applications a century ago.
The original engine was a six horsepower class "F" engine.
www.blueridgemachinery.com /steamkits.htm   (378 words)

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