external combustion engines

what is a combustion engine

A combustion engine is a complex machine that burns fuel to produce thermal energy and then uses the thermal energy to do work. There are two types of combustion engines: external and internal. A steam engine is an external combustion engine.

how external combustion engines work

An external combustion engine burns fuel externally, or outside the engine. The burning fuel releases thermal energy, which is used to heat water and change it to steam. The pressure of the steam moves a piston back and forth inside a cylinder. The kinetic energy of the moving piston can be used to turn a vehicles wheels, a turbine, or other mechanical device. The Figure 1.1 explains in greater detail how this type of engine works. Q: What type of energy does the piston have when it moves back and forth inside the cylinder? A: Like anything else that is moving, the moving piston has kinetic energy.

textbook_image

instructional diagrams

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questions

a steam engine is an external combustion engine.

-->  a. true

b. false

an external combustion engine

-->  a) burns fuel outside the engine.

b) changes kinetic energy to thermal energy.

c) runs on electricity.

d) all of the above

the kinetic energy of an external combustion engine can be used to

a) turn the wheels of a vehicle.

b) turn a turbine.

c) run other machines.

-->  d) all of the above

an external combustion engine burns fuel to heat air.

a. true

-->  b. false

external combustion engines are no longer in use today.

a. true

-->  b. false

diagram questions

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