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Optimization and exergy-energy-economic analysis of a modified Rankine cycle utilizing waste heat recovery from clinker processes in a cement plant
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Habibollah Farrokhi   , Alireza Baheri , Behzad Azizimehr * , Farhad Dowlatabadi |
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Abstract: (83 Views) |
With the advancement of technology and more sophisticated thermodynamic analyses, the optimization of the Rankine cycle and its integration with other thermal energy sources have become feasible. This study focuses on the design and simulation of a small-scale power and heat generation system based on a modified Rankine cycle. The primary aim is to harness waste heat from the cooling section of a cement production plant for the simultaneous generation of electricity and heat, employing a comprehensive approach from both thermodynamic and economic perspectives. The energy analysis of the system is based on the principles of conservation of mass, energy, and momentum, while the exergy analysis employs a model derived from the first and second laws of thermodynamics. Critical parameters influencing the system's performance—such as turbine inlet and outlet pressures and the heat supplied to the boiler—were identified and their effects on improving system efficiency were evaluated. Optimization was performed using a genetic algorithm, taking into account the characteristics of the working fluid. The results of the analysis reveal that, under initial conditions, the system achieves an energy efficiency of 23% and an exergy efficiency of 22.68%. After optimization, these efficiencies were increased to 29.63% and 37.03%, respectively. |
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| Keywords: exergy, combined heat and power generation system, cement production plant, system performance optimization, enhanced Rankine thermal cycle. |
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Full-Text [PDF 1261 kb]
(32 Downloads)
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Type of Study: Research |
Subject:
Thermodynamics
Received: 2025/07/27 | Accepted: 2025/09/24 | Published: 2025/12/1
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