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Design of Container Ship Main Engine Waste Heat Recovery Supercritical CO2 Cycles, Optimum Cycle Selection through Thermo-Economic Optimization with Genetic Algorithm and Its Exergo-Economic and Exergo-Environmental Analysis

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 26 Jul 2022Publisher:MDPI AGJournal:Energies, volume 15, page 5,398 (eissn: 1996-1073,

Authors: Athanasios G. Vallis; Theodoros C. Zannis; Evangelos V. Hristoforou; Elias A. Yfantis; Efthimios G. Pariotis; Dimitrios T. Hountalas; John S. Katsanis;

doi: 10.3390/en15155398

Design of Container Ship Main Engine Waste Heat Recovery Supercritical CO2 Cycles, Optimum Cycle Selection through Thermo-Economic Optimization with Genetic Algorithm and Its Exergo-Economic and Exergo-Environmental Analysis

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Abstract

In the present study, energy and exergy analyses of a simple supercritical, a split supercritical and a cascade supercritical CO2 cycle are conducted. The bottoming cycles are coupled with the main two-stroke diesel engine of a 6800 TEU container ship. An economic analysis is carried out to calculate the total capital cost of these installations. The functional parameters of these cycles are optimized to minimize the electricity production cost (EPC) using a genetic algorithm. Exergo-economic and exergo-environmental analyses are conducted to calculate the cost of the exergetic streams and various exergo-environmental parameters. A parametric analysis is performed for the optimum bottoming cycle to investigate the impact of ambient conditions on the energetic, exergetic, exergo-economic and exergo-environmental key performance indicators. The theoretical results of the integrated analysis showed that the installation and operation of a waste heat recovery optimized split supercritical CO2 cycle in a 6800 TEU container ship can generate almost 2 MW of additional electric power with a thermal efficiency of 14%, leading to high fuel and CO2 emission savings from auxiliary diesel generators and contributing to economically viable shipping decarbonization.

Related Organizations

Hellenic Naval Academy
Greece
42 Technology (United Kingdom)
United Kingdom
Hellenic Naval Academy
Greece
National Technical University of Athens
Greece

Keywords

CO<sub>2</sub>, waste heat recovery, Technology, thermos-economic analysis, supercritical cycle, T, waste heat recovery; supercritical cycle; CO<sub>2</sub>; thermos-economic analysis; EPC; optimization; exergo-economic; exergo-environmental, EPC, optimization

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