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A power generating plant which has gas turbine as the prime mover for thegeneration of electrical energy, is called the gas turbine power plant. The blockdiagram of a typical gas turbine power station is shown in the figure.
In a gas turbine power plant, natural air is used as the working agent. The air iscompressed with the help of a compressor and fed to a combustion chamberwhere heat is added to this compressed air, which increases the temperature ofthe air. The heat to the compressed air is added either by burning fuel in thecombustion chamber or by the use of air heaters.
Then, the hot and compressed air from the combustion chamber is passedthrough the gas turbine where it expands and does the mechanical work, i.e. theheat energy of the compressed air is converted into mechanical energy. The gasturbine drives the alternator which converts the mechanical energy of theturbine into electrical energy.
Also, it is important to note that the compressor, gas turbine and the alternatorare mounted on the same shaft so that the mechanical power of the turbine canbe utilised for the operation of the compressor.
The gas turbine power stations are primarily used as the standby power plantsfor hydroelectric power plants for driving auxiliaries in the power plants atstarting.
FAQs
Power Generation/Gas Turbine Power
| Advantages | Disadvantages |
|---|
| Less water used since there is no need for a condenser | Temperature of combustion chamber is too high thus resulting in a lower life. |
| Maintenance charges are low | . |
| Can be started quickly | . |
| No stand-by losses | . |
3 more rowsJan 4, 2018
Wind turbines offer several advantages, including low operating costs and emissions, a long lifespan, and the potential to produce more energy than they consume. However, they also have some limitations, such as the need for windy conditions to generate power, difficulty predicting wind patterns, and noise pollution.
What are the major components of a gas turbine power plant? ›
Components of a Gas Turbine. A gas turbine consists of several essential components, including a compressor, combustion chamber, turbine, and sometimes a power turbine. The compressor compresses incoming air, which then mixes with fuel in the combustion chamber, where it ignites.
How does a gas turbine power plant work? ›
As hot combustion gas expands through the turbine, it spins the rotating blades. The rotating blades perform a dual function: they drive the compressor to draw more pressurized air into the combustion section, and they spin a generator to produce electricity.
What are the disadvantages of a gas turbine power plant? ›
2 Disadvantages of the Power Plants with Gas Turbine Units [1]
- Low efficiency, especially at the partial operation modes. ...
- High structural complexity. ...
- Shorter service life.
However, they also have disadvantages, including relatively lower efficiency in simple cycle applications, high capital costs, environmental impact, noise and vibration concerns, and water requirements.
What are the negative effects of turbines? ›
Wind turbine blades make noise as they turn in the wind and some people do not like the sound. Birds and bats can be injured or killed if they are hit by turbine blades. These deaths may contribute to declines in the population of species also affected by other human-related impacts.
Are gas turbines expensive? ›
Combustion turbine power plants are the cheapest form of natural gas generator installed in the U.S. In 2021, the average construction cost for this type of electricity generator stood at 512 U.S. dollars per kilowatt of capacity.
What are the advantages and disadvantages of gas turbine and steam turbine? ›
The installation cost of a gas turbine is relatively less than that of steam turbine. The steam turbine has high efficiency. The efficiency of a gas turbine is relatively less. The operating (or running) cost of a steam turbine comparatively high.
How much does a natural gas power plant cost? ›
The capital cost of an NGCC plant larger than 200 MW ranges from $450 to $650 per kW. A smaller plant ranges from $650 to $1,200 per kW. Additionally, a large NGCC plant can be built in less than 24 months. Lower emissions and environmental impact.
All parts are important, but the Hot section is very important, metallurgically. This section from the combustion chambers to the Turbine inlet nozzles run close to their temperature limits !
What are the 3 main components of a gas turbine? ›
The essential parts of a typical gas turbine are shown in Figure 1, which are a compressor, a combustor or combustion chamber, and the turbine. Figure 2 shows the entropy-temperature (T-S) diagram of a typical GT unit. ...
Which advantage of gas turbine is the most important? ›
- Advantage:
- 1- fast starting and loading up.
- 2- relitivley less auxiliaries than steam turbine.
- 3- low capital cost.
- 4- required little cooling system.
- 5- no vacuum required at any place.
- 6- simple speed control ( only air , fuel,&RPM)
- Disadvantage:
The typical lifespan of a gas-fired power plant can vary depending on several factors such as the type of technology used, operating conditions, and maintenance practices. However, a well-maintained gas-fired power plant can typically last for 30 to 40 years or more.
What are the advantages of gas turbine power plant? ›
Advantages of Gas Turbine Power Plant
A gas turbine power plant requires less water as compared to a thermal power plant since no condenser is used. The capital and running costs are much lower than that of a thermal power plant of the same generating capacity. The maintenance cost is also quite small.
What are the advantages of a gas power plant? ›
Environmentally-friendly. Yet another major benefit of gas turbine power plants is the fact that they are environmentally-friendly. Not only do they run on natural gas, but unlike internal combustion engines (ICE), they produce less exhaust gas pollution. In fact, gas turbines use the excess air for combustion purposes ...
What are the advantages and disadvantages of gas power? ›
Gas-fired power stations
| Gas-fired power stations |
| Advantages Shortest start up time Produces least pollution between oil, gas and coal | Disadvantages Non renewable fuel-limited and will run out Produces carbon dioxide and sulphur dioxide |
2 more rowsDec 28, 2016
Advantages of gas turbine-
The gas turbine is smooth in operation and continuous in performance. It does not have any reciprocating part, hence it is easy to balance. It is free from vibrations. There is no sequence of suction, compression, ignition, and expansion, as in the petrol engine.
