Gas power Plants | Types, operation, benefits, and applications of gas turbine power plants.

 

In this post, you will learn about gas turbine power plants, their operation, benefits, drawbacks, and unique types of gas turbine power plants.

 

 

Gas Turbine Power Plant

 

In all power-generating stations that do not have a photovoltaic electricity-generating station worker alternator to generate electrical energy, An alternator is a rotating machine that can produce electrical energy solely when it rotates. Hence there should be a high mover, which helps to flip the alternator. The most important association of all energy flora is to rotate the top mover in order for the alternator to generate the necessary electricity.

 

To rotate the turbine in a high-strength fuel turbine plant, we use excessive stress and temperature air rather than excessive strain and temperature steam. The imperative working principle of a gasoline turbine electricity plant is identical to that of a steam turbine electricity plant.

 

The sole distinction is that in a steam turbine energy plant we use compressed steam to rotate the turbine, whereas in a gasoline turbine energy plant we use compressed air to flip the turbine. In the gasoline turbine electricity plant, air is compressed in a compressor.

 

This compressed air then passes through a combustion chamber, where the temperature of the compressed air rises. That excessive temperature and high-pressure air are surpassed by a gasoline turbine. The compressed air in the turbine is unexpectedly expanded; as a result, it gains kinetic energy, and because of this kinetic strength, the air can do mechanical work to rotate the turbine.In a fuel turbine electricity plant, the shaft of the turbine, alternator, and air compressor are common. The mechanical power created in the turbine is partly used to compress the air. Gas turbine energy flowers are in general used as standby auxiliary energy providers in a hydroelectric electricity plant. It generates auxiliary power early in the life of a hydroelectric power plant. 

 

Gas turbine power plant types

 

The gas turbines can be classified into:

1. Open cycle gas turbine power plant
2. Closed cycle gas turbine power plant

 

 

1-Open cycle gas turbine power plant

 

An open cycle fuel turbine can be described as a combustion turbine plant that is fired up using liquid gasoline to rotate a generator so that electrical energy can be produced. At 550 oC, residual heat can be transferred to the surroundings. The mills and turbines are enclosed to reduce noise levels and take up an approximate 75 m x 25 m area for each unit.

 

The exhaust stack can reach a height of 30 meters, while the consumption shape is only about 20 metres high. The important aspects used in the open cycle gasoline turbine consist of a compressor, combustion chamber, turbine, management, and start-up. A compressor takes air from the environment and compresses it at several levels within the compressor. The liquid gasoline can be furnished to a combustion chamber, where the chamber consists of compressed air.

 

After that, the mixture of air and gas can be ignited to produce high-velocity gasoline. This gasoline can be furnished through the use of the blades of turbine blades to make the shaft that is related to the rotor inside the generator. The rotation of the rotor can be accomplished inside the stator so that electrical energy can be generated. After that, this electrical energy can be provided by the community at excessive voltage anywhere it is required. The classification of the gasoline turbine can be carried out based totally on the three most important activities: the technique of combustion, working substance path, and combustion gas motion inside the turbine.

 

 

2-Closed cycle gas turbine power plant

 

Switzerland is where the closed cycle gas turbine plant was invented and developed. This sort of machine was first proposed by J. Ackeret and C. Keller in 1935, and the first plant was finished in Zurich in 1944. It had a usable output of 2 MW and used air as its working medium. Many closed cycle gas turbine facilities have subsequently been constructed all over the world, with the largest having a 17 MW capacity and functioning successfully since 1967 at Gelsenkirchen, Germany. The working fluid—air or any other suitable gas exiting the compressor in a closed-cycle gas turbine plant is heated in a heater by an external source at constant pressure.

 

The gas turbine is fed air that is both hot and at high pressure from the external heater. Prior to entering the compressor, the fluid exiting the turbine is cooled in the cooler using an external cooling source to its initial temperature. The working fluid is continually employed in the system without changing phases, and the working fluid in the heat exchanger receives the necessary heat. Figure 1 depicts how the parts of the closed cycle gas turbine plant are arranged.

 

 

The Operation of a Gas Turbine Power Plant  

 

A schematic diagram of a gas turbine power plant is shown in the figure. It consists of a compressor, turbine, and combustion chamber. Atmospheric air is drawn into the compressor and compressed to high pressure. The compressed air is supplied to the combustion chamber, where heat is added to the air by burning the fuel and raising its temperature. 

The hot gas coming out of the combustion chamber is then passed to the turbine, where it expands, doing mechanical work. Part of the power developed by the turbine is used to drive the compressor and other auxiliary equipment, and the remaining is used for power generation. The gas coming out of the turbine is exhausted into the atmosphere. This cycle is known as an open cycle power plant. If the gas coming out of the turbine is cooled to its original temperature in a cooler, and then it is recirculated to the compressor for work, such a cycle is known as a closed-cycle power plant.

 

Advantages of a Gas Turbine Power Plant

Following are the advantages of a gas turbine power plant:

 

• The work developed per kg of air is large compared to the diesel plant.
• Less space is required.
• less vibration due to perfect balancing.
• low capital cost.
• higher mechanical efficiency.
• the higher the speed of the turbine.
• Low installation and maintenance costs.
• Simple ignition and lubrication systems.
• Poor quality fuels can be used.
• better torque characteristics of the plant.
• There is no ash handling issue.

 

  

Disadvantages of a Gas Turbine Power Plant

 

• Poor part-load efficiency.
• Special cooling methods are required for cooling turbine blades.
• Short life.
• Special metals and alloys are required for components.

 

 

Applications of gas turbine power plants

 

The gas turbine plants are used for the following purposes:

 

1. It is used to drive the generators and supply peak loads in steam, diesel, or hydro plants.
2. to work as combustion plants with a conventional steam boiler.
3. to supply a mechanical drive for auxiliaries.
4.  used in ships and jet aircraft.

 

Conclusion

 

That's it. I appreciate you reading. Leave a comment if you have any queries about the different "gas turbine power plant" kinds. Share the article with your friends if you enjoyed it.