Thermodynamic Analysis of Marine Diesel Engine Exhaust Heat-Driven Organic and Inorganic Rankine Cycle Onboard Ships

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dc.authoridhttps://orcid.org/0000-0003-3264-0021
dc.authoridhttps://orcid.org/0000-0002-0037-8332
dc.contributor.authorEzgi, Cüneyt
dc.contributor.authorKepekçi, Haydar İzzettin
dc.date.accessioned2025-06-12T23:24:31Z
dc.date.available2025-06-12T23:24:31Z
dc.date.issued2024
dc.departmentMühendislik ve Mimarlık Fakültesi
dc.description.abstractDue to increasing emissions and global warming, in parallel with the increasing world population and energy needs, IMO has introduced severe rules for ships. Energy efficiency on ships can be achieved using the organic and inorganic Rankine cycle (RC) driven by exhaust heat from marine diesel engines. In this study, toluene, R600, isopentane, and n-hexane as dry fluids; R717 and R718 as wet fluids; and R123, R142b, R600a, R245fa, and R141b as isentropic fluids are selected as the working fluid because they are commonly used refrigerants, with favorable thermal properties, zero ODP, low GWP and are good contenders for this application. The cycle and exergy efficiencies, net power, and irreversibility of marine diesel engine exhaust-driven simple RC and RC with a recuperator are calculated. For dry fluids, the most efficient fluid at low turbine inlet temperatures is n-hexane at 39.75%, while at high turbine inlet temperatures, it is toluene at 41.20%. For isentropic fluids, the most efficient fluid at low turbine inlet temperatures is R123 with 23%, while at high turbine inlet temperatures it is R141b with 23%. As an inorganic fluid, R718 is one of the most suitable working fluids at high turbine inlet temperatures of 300 ◦C onboard ships with a safety group classification of A1, ODP of 0, and GWP100 of 0, with a cycle efficiency of 33%. This study contributes to significant improvements in fuel efficiency and reductions in greenhouse gas emissions, leading to more sustainable and cost-effective maritime operations.
dc.identifier.doi10.3390/app14167300
dc.identifier.issn2076-3417
dc.identifier.issue16
dc.identifier.urihttps://hdl.handle.net/11363/9915
dc.identifier.volume14
dc.identifier.wos001305168600001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.institutionauthorKepekçi, Haydar İzzettin
dc.institutionauthoridhttps://orcid.org/0000-0002-0037-8332
dc.language.isoen
dc.publisherMDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND
dc.relation.ispartofAPPLIED SCIENCES-BASEL
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectmarine engine
dc.subjectexhaust gas
dc.subjectRankine cycle
dc.subjectwaste heat
dc.titleThermodynamic Analysis of Marine Diesel Engine Exhaust Heat-Driven Organic and Inorganic Rankine Cycle Onboard Ships
dc.typeArticle

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