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Period: 10 to 70
Hero of Alexandria
- Made the Hero's steam engine.
- He was a greek engineer
- Created the first mechanical device that used heat as a source of energy
- A heat source heats up water inside a metal sphere thus causing the steam from the water to be forced out of the nozzle. The steam leaving causes the spherical ball to rotate.
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Denis Papin
- Made the heat engine
- Designed the first heat engine
- Heat would make steam to do work
- Making a large drum for the water caused difficulty while making. *
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Thomas Savery
- Made the Savery Engine
- Invented the first successful steam-powered engine.
- Was used to pump water out of mines
- Could life water to a height of 6m.
- For water to be raised higher, steam was put at a higher pressure.
- This was difficult because the boiler used couldn't produce that high of pressure without exploding.
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Thomas Newcomen
- Made the Newcomen Engine
- Used steam as a driving force
- A boiler produced steam that forced a piston up a cylinder.
- Cold water was sprayed on the outside of the cylinder, thus condensing the steam and causing the piston to move back down the cylinder.
- A pivoting beam was connected to both the piston rod and the mine pump.
- The upward and downward movement made the piston drive a pump.
- Easy to build and maintain.
- Water was able to be pumped longer distances.
- Very inefficient.
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James Watt
- Made the Watt Engine.
- Realized there was a tremendous quantity of waste.
- He made a more efficient steam engine.
- The engine has a seperate cooler and boiler cylinder.
- This reduced the amount of heat needed to operate the engine.
- This engine powered things from water pumps to large ships.
- Very easy to build and maintain.
- Very large.
- Got very hot, dirty, and inefficient.
- A lot of heat created was lost to the surroundings.
- This engine was used for over 100 years.