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FAQs on Gas Power Cycle, Power Plant Engineering - Thermodynamics - Mechanical Engineering

1. What is a gas power cycle?
Ans. A gas power cycle refers to the series of processes involved in converting fuel (such as natural gas) into mechanical work or electricity. It typically includes processes of compression, combustion, expansion, and heat rejection.
2. How does a gas power cycle work in a power plant?
Ans. In a gas power cycle for a power plant, the process starts with the compression of the gas, increasing its pressure and temperature. The compressed gas is then combusted with a fuel, generating high-pressure and high-temperature gases. These gases then expand in a turbine, producing mechanical work that is used to turn a generator and produce electricity. Finally, the waste heat from the combustion and expansion processes is rejected in a heat exchanger, improving overall efficiency.
3. What are the advantages of a gas power cycle in power plant engineering?
Ans. Some advantages of a gas power cycle in power plant engineering include high efficiency, quick startup and shutdown capability, flexibility in fuel choice, and lower emissions compared to other power generation technologies. Gas power cycles also have a smaller footprint, making them suitable for decentralized power generation.
4. What are the main components of a gas power cycle?
Ans. The main components of a gas power cycle include a compressor, combustion chamber, turbine, and heat exchanger. The compressor is responsible for compressing the gas, the combustion chamber facilitates the combustion process, the turbine extracts work from the expanding gases, and the heat exchanger rejects waste heat.
5. How does a gas power cycle differ from a steam power cycle?
Ans. A gas power cycle differs from a steam power cycle primarily in the working fluid used. While a gas power cycle utilizes a gas (such as air or natural gas), a steam power cycle uses water/steam as the working fluid. The operating pressures and temperatures also differ, as well as the specific processes involved in each cycle.
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