Design optimization of supercritical carbon dioxide (s-CO2) cycles for waste heat recovery from marine engines

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dc.contributor.authorHossain, Md. J.
dc.contributor.authorChowdhury, Jahedul Islam
dc.contributor.authorBalta-Ozkan, Nazmiye
dc.contributor.authorAsfand, Faisal
dc.contributor.authorSaadon, Syamimi
dc.contributor.authorImran, Mohammad
dc.date.accessioned2021-02-01T16:15:01Z
dc.date.available2021-02-01T16:15:01Z
dc.date.issued2021-01-29
dc.description.abstractThe global climate change challenge and the international commitment to reduce carbon emission can be addressed by improving energy conversion efficiency and adopting efficient waste heat recovery technologies. Supercritical carbon dioxide (s-CO2) cycles that offer a compact footprint and higher cycle efficiency are investigated in this study to utilize the waste heat of the exhaust gas from a marine diesel engine (Wärtsilä-18V50DF, 17.55 MW). Steady-state models of basic, recuperated and reheated s-CO2 Brayton cycles are developed and optimised for net work and thermal efficiency in Aspen Plus to simulate and compare their performances. Results show that the reheated cycle performs marginally better than the recuperated cycle accounting for the highest optimised net-work and thermal efficiency. For the reheated and recuperated cycle, the optimized net-work ranges from 648–2860 kW and 628–2852 kW respectively, while optimized thermal efficiency ranges are 15.2–36.3% and 14.8–35.6% respectively. Besides, an energy efficiency improvement of 6.3% is achievable when the engine is integrated with an s-CO2 waste heat recovery system which is operated by flue gas with a temperature of 373 °C and mass flow rate of 28.2 kg/s, compared to the engine without a heat recovery system.en_UK
dc.identifier.citationHossain MJ, Chowdhury JI, Balta-Ozkan N, et al., (2021) Design optimization of supercritical carbon dioxide (s-CO2) cycles for waste heat recovery from marine engines. Journal of Energy Resources Technology, Volume 143, Issue 12, December 2021, Article number 120901en_UK
dc.identifier.issn0195-0738
dc.identifier.urihttps://doi.org/10.1115/1.4050006
dc.identifier.urihttps://asmedigitalcollection.asme.org/energyresources/article/doi/10.1115/1.4050006/1097038/Design-optimization-of-supercritical-carbon
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/16286
dc.language.isoenen_UK
dc.publisherAmerican Society of Mechanical Engineersen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectenergy conversion/systemsen_UK
dc.subjectenergy systems analysisen_UK
dc.subjectheat energy generation/storage/transferen_UK
dc.subjectpower (co-) generationen_UK
dc.titleDesign optimization of supercritical carbon dioxide (s-CO2) cycles for waste heat recovery from marine enginesen_UK
dc.typeArticleen_UK

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