APA
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Meana-Fernández, A., Peris-Pérez, B., Gutiérrez-Trashorras, A. J., Rodríguez-Artime, S., Ríos-Fernández, J. C., & González-Caballín, J. M. (2020). Optimization of the propulsion plant of a Liquefied Natural Gas transport ship. Energy Conversion and Management, 224(15), 113398. https://doi.org/10.1016/j.enconman.2020.113398
Chicago/Turabian
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Meana-Fernández, A., B. Peris-Pérez, A. J. Gutiérrez-Trashorras, Santiago Rodríguez-Artime, Juan Carlos Ríos-Fernández, and Juan M. González-Caballín. “Optimization of the Propulsion Plant of a Liquefied Natural Gas Transport Ship.” Energy Conversion and Management 224, no. 15 (2020): 113398.
MLA
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Meana-Fernández, A., et al. “Optimization of the Propulsion Plant of a Liquefied Natural Gas Transport Ship.” Energy Conversion and Management, vol. 224, no. 15, 2020, p. 113398, doi:10.1016/j.enconman.2020.113398.
BibTeX Click to copy
@article{a2020a,
title = {Optimization of the propulsion plant of a Liquefied Natural Gas transport ship},
year = {2020},
issue = {15},
journal = {Energy Conversion and Management},
pages = {113398},
volume = {224},
doi = {10.1016/j.enconman.2020.113398},
author = {Meana-Fernández, A. and Peris-Pérez, B. and Gutiérrez-Trashorras, A. J. and Rodríguez-Artime, Santiago and Ríos-Fernández, Juan Carlos and González-Caballín, Juan M.}
}
Stricter emission regulations and variability of fuel prices pose the focus on the optimization of steam turbine based propulsion plants of Liquefied Natural Gas (LNG) ships. The efficiency of such a propulsion plant has been improved in this work by studying the introduction of reheating and preheating stages in the onboard regenerative Rankine cycle. A thermodynamic model of the propulsion plant has been developed from the facility diagrams, being validated afterwards with available experimental data from actual ship operation. The predictions of different scenarios obtained by the model when introducing modifications in the power propulsion cycle showed promising results. It was found that a combination of preheating and reheating stages was found to increase the cycle efficiency up to 33.71%, reducing fuel consumption in around 20 t/day and CO emissions in more than 20,000 t per year. An exergy analysis of the impact of cycle modifications and an economic assessment of the proposed investment plan were performed. It was found that the boiler was the main contributor to exergy destruction, fact that justifies the cycle modifications performed. The economic analysis of the investment plan of implementing the selected alternative provided benefits even in a conservative scenario, with an Internal Rate of Return higher than 12% and a Pay-Back Period less than 9 years for all the studied scenarios. In summary, a practical industrial application of thermodynamic and exergy analysis to the propulsion plant of a LNG ship has been shown, allowing an efficiency, economic and environmental improvement.
Ocean transportation; LNG ship; Propulsion efficiency; Thermodynamic optimization; Steam Rankine cycle
