Name: ガスタービンとは？(初心者向け) (What is a Gas Turbine? (For beginners))
Uploaded: 2021-01-14T08:17:33.000Z
Duration: 9 min 35 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Two of the most common applications of Gas Turbines in modern industries

are Turbo Generators and Turbo Compressors.

I try to approach a Gas Turbo Generator (GTG) to better feel the subject.

and the little bell to receive notifications of new RealPars videos.

there's a Generator which is an electrical machine.

The Gas Turbine transforms the chemical energy in the fuel

(i.e. natural gas or the similar fuel) into mechanical energy.

The mechanical energy generated by the Turbine exit shaft

is then transferred through a gearbox to the Generator's shaft.

Now my generator can create electrical energy.

This primitive form of electrical energy normally has a low

and to better manage the power loss in transmission lines,

this voltage should be increased by step-up transformers.

Such transformers give an adequate level of voltage to the electrical energy

to be transmitted through the transmission lines and delivered to the grid.

After this brief overview of a sample Gas Turbine application,

I'm going to dig down into the Gas Turbine mechanism in more detail.

in which some fuel is going to burn and create a high-pressure exhaust gas.

the chemical energy of the fuel is transformed into mechanical energy

the thrust of this exhaust gas moves the rocket forward.

This amount of rocket science is enough for me

and now suppose I fix the rocket body with a robust mechanical structure

should be released and it will have no way but backward!

and imagine I put a set of turbine blades

in the path of this high-pressure back-fired exhaust.

You see that the release of mechanical energy

which is mostly in a “linear” backward direction

will mostly transform into kind of “rotational” of turbine shaft

i.e. transforming the chemical energy of fuel gas

into rotational mechanical energy of turbine shaft.

Now I have a “Prime Mover” for my generator

Also, this prime mover concept can be used in different applications

Now that I have the basics of Gas Turbines,

let's focus on a modern Gas Turbine and its components.

Most likely you know about “Fire Triangle” or “Combustion Triangle”

which illustrates the necessary ingredients of fire or combustion,

i.e. “Fuel”, “Air”, and “Heat”.

To transform the chemical energy of the fuel gas into mechanical energy,

the fuel should be burnt in the “Combustion Chamber” of a gas turbine,

so I need air and heat added to the fuel.

Air is let into the gas turbine through “Air Intake”

and mixed with a proper amount of natural gas.

The Air/Gas ratio is determined based on the specific heating value of the gas

and quality of the air, amount of moisture, altitude from sea level and so on.

Now an ignition system steps in and makes the initial sparks,

When the fire is established and stabilized in the combustion chamber,

the ignition system will be put out of service.

The most critical process in normal turbine operation

and produce a proper amount of high-pressure exhaust gas.

This exhaust gas is applied to the turbine blades

and after rotating the turbine shaft, conducted to the exhaust stack.

With this quick review of key components of a Gas Turbine,

I think it's time to decrease the altitude and elaborate on the system further.

As mentioned earlier, air is let into the Gas Turbine through Air Intake.

The air is prone to contaminations or having some unwanted particles

which can harm the system and degrade the overall performance.

The screening and filtration are basic requirements for incoming air.

Also, proper instrumentation is mounted on the Air Duct

to monitor the draft pressure and temperature.

In harsh environments, the air might need to be preheated or conditioned.

Also, differential pressure monitoring of air filters

will warn the turbine operator of filter clogging.

The conditioned air is conducted into the “turbine air compressor”

which is an axial compressor comprised of multi-stages of blades

mounted radially on the turbine inlet shaft.

The discharge pressure and temperature of the air compressor

are monitored to manage the combustion quality at the combustion chamber.

“Fuel gas” is a key factor in the design and operation of a gas turbine.

The manufacturers need to know the details of fuel gas

can guarantee the performance of their gas turbines.

Also, the pressure and temperature of fuel gas

are monitored during normal operation of a gas turbine.

There are different technologies in properly mixing the air and gas

and making efficient combustion from manufacturer to manufacturer.

Combustion chambers are of some tubular heat resistant structures

and fuel is usually injected into it from the circumference

字幕リスト動画再生

ガスタービンとは？(初心者向け) (What is a Gas Turbine? (For beginners))

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