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Research Article Volume 9 Issue 4
MATLAB simulation study of combined cycle (Reheat) using different fuels with optimum supplementary heat from HRSG for Work net and optimum efficiency
Rajesh Kumar
Received: November 28, 2025 | Published: December 5, 2025
Citation: Kumar R. MATLAB simulation study of combined cycle (Reheat) using different fuels with supplementary heat from HRSG for optimum work net and optimum efficiency. Aeron Aero Open Access J. 2025;9(4):193-203. DOI: 10.15406/aaoaj.2025.09.00238
Abstract
In this paper, the simulation results of combined cycle power plants based on the use of supplementary fraction bypass heat from combustion chamber and gas turbine exit exhaust gases heat to use in HRSG, with reheat are presented. The analysis procedure is followed for finding both optimums Worknet and optimum efficiency. A fraction of hot gases heat from combustion chamber is bypassed to HRSG. Exit heat from gas turbine also passed through the HRSG. The simulation is carried out for different fuels and different air fuel ratios for different pressure ratios. The simulation codes are made in MATLAB. The significance of this kind of investigation give advantages of combine power plant that utilizes the waste energy for generation of steam to run the steam turbines. This leads to increase in power output in thermal efficiency. The performance of combined cycle depends upon the number of parameters like pressure ratios, types of fuel used, component efficiency, turbine exhaust temperature, degree of supplementary heating and condition of steam generation. It is noticed that fraction hot gases bypassed from combustion chamber to HRSG certainly give sufficient heat energy to generate steam at required pressure and temperature to obtain the optimum Worknet and optimum efficiency significantly.
Keywords: combined cycle power plants, supplementary heating, HRSG
©2025 Kumar. This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and build upon your work non-commercially.