Frequent question: Why is power generation by gas turbine attractive these days?

Why is power generation by gas turbines attractive these days?

The economics of power generation by gas turbines is proving to be more attractive, due to low capital cost, and high reliability and flexibility in operation. … The initial cost and operating cost of the plant is lower than an equivalent steam power plant. A thermal plant of 250 MW capacity cost about Rs. 250 crores.

What are the advantages of gas turbine?

Major benefits of gas turbines

  • #1. Lower operational cost.
  • #2. Efficient and durable.
  • #3. Facilitates distributed power generation.
  • #4. Environmentally-friendly.
  • #5. High operational speed and low lubrication cost.

Why is gas turbine preferred?

Gas turbines can offer a high power density. They’ve become the preferred drivers for large compressors and very large pumps for a variety of reasons, such as: … A train driven by a modern gas turbine can provide appreciable capital cost savings compared to one driven by a steam turbine or an electric motor.

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Why gas turbines are most preferred power generating units in aircraft?

Mechanically, gas turbines can be considerably less complex than internal combustion piston engines. … The primary advantage of a gas turbine engine is its power to weight ratio. Since significant useful work can be generated by a relatively lightweight engine, gas turbines are perfectly suited for aircraft propulsion.

What is the use of turbine in power generation plants?

What is a gas turbine, and how does it work? A gas turbine is a combustion engine at the heart of a power plant that can convert natural gas or other liquid fuels to mechanical energy. This energy then drives a generator that produces the electrical energy that moves along power lines to homes and businesses.

What are the advantage of reheating in a gas turbine power plant?

The advantages of using a reheat cycle are higher thermal efficiency, reduced feed water pump power, smaller condenser, smaller boiler, long life of the turbine and less handling of the fuel and firing requirement.

What are the advantages and disadvantages of gas turbine power plant?

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 .

What are features of gas turbine?

Main Characteristics of Gas Turbine and Gas Engine

Gas Turbine Gas Engine
Total Efficiency of Cogeneration (LHV) 80-83% 63.5-77%
Electrical Efficiency (Partial Load) Good Very Good
Exhaust Heat High exhaut gas temperature and amount Low exhaust gas temperature
NOx Emissions (O2=15%) 15-25ppm (DLE) 57ppm
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How does gas turbine generate electricity?

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.

Why is gas turbine efficiency so low?

The decrease in the compressor airflow rate results in a decrease in the compressor power absorbed. Similarly, the reduction in the turbine flow also results in a decrease in turbine power. The compressor efficiency decrease is due primarily to the effects of compressor fouling.

What is the significance of gas turbine engines in today’s modern aviation period and why are they important?

By far the most important use of gas turbines is in aviation, where they provide the motive power for jet propulsion. Because of the significance of this application and the diversity of modern jet engines, the subject will be dealt with at length in a separate section of the article.

What are the advantages of gas turbine over reciprocating IC engines?

From higher efficiency and lower costs to faster, cleaner, higher quality power generation, aeroderivative gas turbines have many advantages over reciprocating engines.