Simulink modelling of Combined Cycle Gas Turbine (CCGT) power plant for performance analysis
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Author |
Biswajit Datta, Kaberi Majumdar, Manish Pal, Pankaj Kr Roy and Aditi Datta
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e-ISSN |
1819-6608 |
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On Pages
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1025-1030
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Volume No. |
18
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Issue No. |
09
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Issue Date |
June 30, 2023
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DOI |
https://doi.org/10.59018/0523133
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Keywords |
combined cycle gas turbine (CCGT), dynamic model, turbine, combined heat and power (CHP), efficiency.
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Abstract
A gas-fired plant and a steam-fired plant make up a combined cycle power station. The purpose of this research is to build a CCGT power plant and investigate the interaction between fuel and airflow using a simulink model. A mathematical model is used to predict how the CCGT power plant system will react. The goal of a turbine is to extract as much energy as possible from the working fluid and convert it into usable work. A large amount of heat energy from the gas turbine exhaust is wasted but has a lot of potential energy. The term total energy approach describes a system's capacity to use all of the energy at its disposal. To generate as little energy waste as possible, every watt of heat energy in a power system is supposed to be used to produce work, steam, or heat air or water. The creation of a mixed-cycle power plant is the most efficient and cost-effective way to accomplish this objective. The concept and early development of the mixed cycle were centred on the utilisation of thermal power plant waste heat. The temperature of the gas turbine exhaust can vary from 450°C to 650°C depending on the pressure ratio and turbine input temperature. It is wasteful to discard this energy into the environment. This wasted heat energy could be used to generate steam in the steam heat recovery generator (HRSG). By employing the Rankine cycle to expand the steam generated by the HRSG in a steam turbine, additional power may be created. One name for this configuration is a gas/steam mixed-cycle power plant. A gas turbine's exhaust temperature must be higher than 570°c. For the steam cycle to function properly and for the combined cycle efficiency to remain high.
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