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1. What is a gas turbine and how does it work?
Ans. A gas turbine is a type of internal combustion engine that converts the energy from burning fuel into mechanical energy. It works on the Brayton cycle, where air is compressed, fuel is added and ignited, and the resulting hot gas is expanded through a turbine to produce power.
2. What are the advantages of using a gas turbine?
Ans. Gas turbines have several advantages, including high power-to-weight ratio, compact size, quick startup time, and the ability to use a variety of fuels. They also have lower emissions compared to other types of power generation technologies.
3. What are the disadvantages of gas turbines?
Ans. Gas turbines have a few disadvantages, such as high manufacturing and maintenance costs, low efficiency at part-load conditions, and noise pollution. They also require a constant supply of fuel, which can be expensive and subject to price fluctuations.
4. What are some common problems faced with gas turbines?
Ans. Common problems with gas turbines include compressor fouling, turbine blade erosion, combustion instability, and hot gas path component degradation. These issues can lead to reduced performance, increased maintenance requirements, and higher operating costs.
5. How does the Brayton cycle differ from other thermodynamic cycles?
Ans. The Brayton cycle is an open cycle, meaning that it operates with a continuous flow of fresh air and exhaust gases. This is different from closed cycles, such as the Rankine cycle used in steam power plants, which involve a working fluid that is recycled within the system. The Brayton cycle's open nature allows for higher power output and greater flexibility in fuel selection.
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