OPEN CYCLE GAS TURBINE • In this cycle, air from the ambient atmosphere is compressed to a higher pressure and temperature by the compressor • In the combustion chamber, air is heated further by burning the fuel-air mixture in the air flow • Combustion products and gases expand in the turbine either to near atmospheric …
On which cycle does the gas turbine plant works Mcq?
A gas turbine power plant uses which cycle: Rankine cycle.
Is gas turbine an open cycle?
Most gas turbines operate on an open cycle in which air is taken from the atmosphere, compressed in a centrifugal or axial-flow compressor, and then fed into a combustion chamber. Here, fuel is added and burned at an essentially constant pressure with…
What are the 3 main components of gas turbine?
Gas turbines are composed of three main components: compressor, combustor and power turbine. In the compressor section, air is drawn in and compressed up to 30 times ambient pressure and directed to the combustor section where fuel is introduced, ignited and burned.
Is open gas turbine used in aircraft?
The fourth step of the Brayton cycle (cooling of the working fluid) is omitted, as gas turbines are open systems that do not reuse the same air. Gas turbines are used to power aircraft, trains, ships, electrical generators, pumps, gas compressors, and tanks.
How gas turbine is shut down?
Explanation: The only way to stop a running Gas turbine is by cutting off the fuel supply so that the various processes in the cycle are stopped.
What is the principle of gas turbine?
The gas-turbine operates on the principle of the Brayton cycle, where compressed air is mixed with fuel, and burned under constant pressure conditions. The resulting hot gas is allowed to expand through a turbine to perform work.
Which is main component in gas turbine plant?
Explanation: The main component of a Gas turbine plant is Compressor.
What fuel is used in a gas turbine?
While gas turbines are often advertised as having fuel flexibility, about 90 percent of gas turbines worldwide operate on natural gas or liquefied natural gas (LNG) because of its purity and ease of combustion. Only about 400 GE gas turbines globally operate on crude, naphtha or heavy fuel oils.
Which type of gas turbine is used in aircraft?
Turbofans are the most widely used gas turbine engine for air transport aircraft. The turbofan is a compromise between the good operating efficiency and high thrust capability of a turboprop and the high speed, high altitude capability of a turbojet.
How does a gas turbine start?
Gas turbine engines come in many shapes and sizes. … The electric motor spins the main shaft until there is enough air blowing through the compressor and the combustion chamber to light the engine. Fuel starts flowing and an igniter similar to a spark plug ignites the fuel.
What is difference between gas turbine and steam turbine?
The primary difference between steam and gas turbines is the fact that steam turbines receive power from expanding steam. … The internal temperature only reaches 500 to 650 degrees Celsius, less than half of the temperature of gas turbine reactions. This water-based cycle is the Rankine Cycle.
Where is turbine used?
Turbines are used in wind power, hydropower, in heat engines, and for propulsion. Turbines are extremely important because of the fact that nearly all electricity is produced by turning mechanical energy from a turbine into electrical energy via a generator.
Which cycle is used in SI engine?
The Otto cycle is the ideal cycle for spark-ignition (SI) engines. This cycle was presented in the late 19th century after Nikolaus Otto demonstrated the four-stroke SI engine successfully .
What is the classification of gas turbine?
Gas turbines are air-breathing, internal combustion heat engines. There are two types of gas turbine cycles: closed and open. Only open cycle gas turbine engine will be considered in this book, and the configurations that will be discussed are highlighted in Chart III.
What is simple gas turbine?
Simple cycle gas plants are a type of natural gas power plant which operate by propelling hot gas through a turbine, in order to generate electricity. … These turbines have a high specific power, which means that the power they provide for how massive they are is relatively high.
What are the advantages of gas turbine?
Major benefits of gas turbines
- #1. Lower operational cost. Lower operational cost is one of the primary reasons why gas turbines have gained so much popularity. …
- #2. Efficient and durable. …
- #3. Facilitates distributed power generation. …
- #4. Environmentally-friendly. …
- #5. High operational speed and low lubrication cost.
Why Brayton cycle is used in gas turbine?
The Brayton Cycle is a thermodynamic cycle that describes how gas turbines operate. The idea behind the Brayton Cycle is to extract energy from flowing air and fuel to generate usuable work which can be used to power many vehicles by giving them thrust.
How many blades Francis turbine has?
75% – 85% efficiency is commonly achieved in the hydropower plant with Francis turbine or even higher. Moreover at off-design conditions, the runner with 13 blades still performs better than others. It can also be noted that the curve for 13 blades has smooth performance at variable discharge conditions.
Which one is not in the part of gas turbine power plant?
2. Which of the following is not used in gas turbine power plant? Explanation: Natural gas itself or mixture of natural gas and air is used as working medium in gas turbine power plant. Condenser is a device or arrangement used to condense low pressure steam already used by turbine.
What are the 6 main parts of a turbine engine?
What are the major components of a typical gas turbine engine? A typical gas turbine engine consist of an air inlet, compression section, combustion section, turbine section, exhaust section, and accessory section.
What is open and closed cycle gas turbine?
In closed cycle gas turbine, the gas that comes out from the gas turbine passes into the cooling chamber. In an open cycle, the gases coming out from the gas turbine is exhausted in the atmosphere. … It is best suited for the moving vehicle because the air from the turbine is discharged into the atmosphere.
What is an open cycle gas turbine?
An open cycle gas turbine can be defined as a combustion turbine plant that is fired up using liquid fuel for rotating a generator so that electricity can be produced. … The major components used in the open cycle gas turbine include a compressor, combustion chamber, turbine, control & start-up.