Proposal and Comprehensive Analysis of a Novel Combined Plant with Gas Turbine and Organic Flash Cycles: An Application of Multi-Objective Optimization

Ramin Ghiami Sardroud (), Amirreza Javaherian (), Seyed Mohammad Seyed Mahmoudi, Mehri Akbari Kordlar and Marc A. Rosen
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Ramin Ghiami Sardroud: Faculty of Mechanical Engineering, Sahand University of Technology, Tabriz P.O. Box 51335, Iran
Amirreza Javaherian: Department of Mechanical Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz P.O. Box 51368, Iran
Seyed Mohammad Seyed Mahmoudi: Department of Mechanical Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz P.O. Box 51368, Iran
Mehri Akbari Kordlar: Center of Energy Technology (ZET), University of Bayreuth, 95445 Bayreuth, Germany
Marc A. Rosen: Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, Oshawa, ON L1G 0C5, Canada

Sustainability, 2023, vol. 15, issue 19, 1-40

Abstract: Environmental, exergo-economic, and thermodynamic viewpoints are thoroughly investigated for a state-of-the-art hybrid gas turbine system and organic flash cycle. For the proposed system, the organic flash cycle utilizes the waste thermal energy of the gases exiting the gas turbine sub-system to generate additional electrical power. Six distinct working fluids are considered for the organic flash cycle: R245fa, n-nonane, n-octane, n-heptane, n-hexane, and n-pentane. A parametric investigation is applied on the proposed combined system to evaluate the impacts of seven decision parameters on the following key operational variables: levelized total emission, total cost rate, and exergy efficiency. Also, a multi-objective optimization is performed on the proposed system, taking into account the mentioned three performance parameters to determine optimum operational conditions. The results of the multi-objective optimization of the system indicate that the levelized total emission, total cost rate, and exergy efficiency are 74,569 kg/kW, 6873 $/h, and 55%, respectively. These results also indicate the improvements of 16.45%, 6.59%, and 3% from the environmental, economic, and exergy viewpoints, respectively. The findings reveal that utilizing n-nonane as the working fluid in the organic flash cycle can yield the lowest levelized total emission, the lowest total cost rate, and the highest exergy efficiency.

Keywords: gas turbine; organic flash cycle; exergo-economic analysis; optimization; levelized total emission (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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