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Introduction of Thermal Machine
2021-08-27
Heat engine refers to all kinds of machines that use internal energy to do work. It is a type of machine power machinery that converts the chemical energy of fuel into internal energy and then into mechanical energy, such as steam engines, steam turbines, gas turbines, internal combustion engines, and jet engines.
Heat engines usually use gas as a working medium (the medium that transfers energy is called working medium), and uses the heated expansion of the gas to do external work. The main sources of thermal energy are heat generated by fuel combustion, atomic energy, solar energy and geothermal energy.
Heat engines play an important role in human life. Modern transportation vehicles rely on it to provide power. The application and development of heat engines promote the rapid development of society, and inevitably lose some energy and cause a certain degree of pollution to the environment.
A heat engine is a machine that uses internal energy to do work.
The working principle of the heat engine: the internal energy is converted into mechanical energy through work (for example: alcohol combustion, chemical energy is converted into internal energy, heat is transferred to the water, and the cork is pushed out after the water boils, and a part of the internal energy of the water vapor is converted into the cork. Mechanical energy.)
To make the gasoline engine work continuously, the piston must return to its original position after pushing the crankshaft in order to push the crankshaft again, which requires the piston to reciprocate in the cylinder. The movement of the piston from one end of the cylinder to the other end of the cylinder in the reciprocating motion is called a stroke.
The four strokes of the heat engine: suction stroke, compression stroke, power stroke, and exhaust stroke.
Four-stroke means two cycles, which means doing work once, inhaling once, consuming 1 cylinder of oil.
The history of heat engine development:
Steam engine → steam turbine → internal combustion engine → jet engine → rocket engine
Heat engines usually use gas as a working medium (the medium that transfers energy is called working medium), and uses the heated expansion of the gas to do external work. The main sources of thermal energy are heat generated by fuel combustion, atomic energy, solar energy and geothermal energy.
Heat engines play an important role in human life. Modern transportation vehicles rely on it to provide power. The application and development of heat engines promote the rapid development of society, and inevitably lose some energy and cause a certain degree of pollution to the environment.
A heat engine is a machine that uses internal energy to do work.
The working principle of the heat engine: the internal energy is converted into mechanical energy through work (for example: alcohol combustion, chemical energy is converted into internal energy, heat is transferred to the water, and the cork is pushed out after the water boils, and a part of the internal energy of the water vapor is converted into the cork. Mechanical energy.)
To make the gasoline engine work continuously, the piston must return to its original position after pushing the crankshaft in order to push the crankshaft again, which requires the piston to reciprocate in the cylinder. The movement of the piston from one end of the cylinder to the other end of the cylinder in the reciprocating motion is called a stroke.
The four strokes of the heat engine: suction stroke, compression stroke, power stroke, and exhaust stroke.
Four-stroke means two cycles, which means doing work once, inhaling once, consuming 1 cylinder of oil.
The history of heat engine development:
Steam engine → steam turbine → internal combustion engine → jet engine → rocket engine
There are many types of heat engines, which are divided into internal combustion engines and external combustion engines according to the way the working fluid receives fuel to release energy.
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