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Ship accessories: Turbochargers and mechanical superchargers
Release time:
2023-08-15
The turbocharger in ship accessories is an auxiliary device used for reciprocating engines. The condition for an engine to generate power is the combustion of oxygen and fuel in the air. As the oxygen content per unit is fixed at a certain atmospheric pressure
The turbocharger in ship accessories is an auxiliary device used for reciprocating engines. The condition for an engine to generate power is the combustion of oxygen and fuel in the air. As the oxygen content per unit is fixed at a certain atmospheric pressure, a typical naturally aspirated engine relies on the pressure difference generated by piston movement to draw air or a mixture of air and fuel into the cylinder. The pressure difference has an upper limit, which limits the power of a naturally aspirated engine to atmospheric pressure. Therefore, the use of a turbocharger is introduced to increase the intake pressure of the engine to increase the oxygen content, which can usually increase the output horsepower of an engine with the same displacement by 20% -50% or even higher; The latest turbocharger technology can reduce fuel consumption.
Turbocharger
Operating principle: The engine exhaust is guided to the turbine, and the turbine blades are driven to rotate by the exhaust gas, which in turn drives the compression blades located on the other side of the intake section to rotate, thereby increasing the intake pressure and achieving a turbocharging effect.
Advantages: It does not consume engine output power and has high efficiency.
Disadvantage: Due to the use of engine exhaust, there is a phenomenon of turbo lag, which has been a major bottleneck in development since World War II. Currently, there are dual turbo systems and variable geometry turbochargers to improve it, but it is still incomplete. And the blades directly come into contact with high-temperature exhaust gas, and the materials used must be able to work continuously at high speeds and temperatures.
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