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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Transactions of the St. Petersburg State Marine Technical University</journal-id><journal-title-group><journal-title xml:lang="en">Transactions of the St. Petersburg State Marine Technical University</journal-title><trans-title-group xml:lang="ru"><trans-title>Труды Санкт-Петербургского государственного морского технического университета</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2414-1437</issn><publisher><publisher-name xml:lang="en">Saint Petersburg State Marine Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">704727</article-id><article-id pub-id-type="doi">10.52899/24141437_2026_02_185</article-id><article-id pub-id-type="edn">WDMLLE</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Mechanical engineering</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Машиностроение</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Comparative analysis of environmental performance of a marine diesel engine operating on conventional diesel fuel and SME B5 biofuel</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнительный анализ экологических показателей судового двигателя при использовании традиционного дизельного топлива и биотоплива SME B5</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2512-067X</contrib-id><contrib-id contrib-id-type="spin">6063-9641</contrib-id><name-alternatives><name xml:lang="en"><surname>Cherkaev</surname><given-names>Georgy V.</given-names></name><name xml:lang="ru"><surname>Черкаев</surname><given-names>Георгий Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Engineering), Associate Professor, Head of the Department of Ship Power Plants, Systems and Equipment</p></bio><bio xml:lang="ru"><p>канд. тех. наук, доцент, заведующий кафедрой судовых энергетических установок, систем и оборудования</p></bio><email>gcherkaev@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tran</surname><given-names>Huu Bac</given-names></name><name xml:lang="ru"><surname>Чан</surname><given-names>Хыу Бак</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Master’s Degree student of the Department of Ship Power Plants, Systems and Equipment</p></bio><bio xml:lang="ru"><p>магистрант кафедры судовых энергетических установок, систем и оборудования</p></bio><email>mullerbac@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Saint Petersburg State Marine Technical University</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский государственный морской технический университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-06-26" publication-format="electronic"><day>26</day><month>06</month><year>2026</year></pub-date><volume>5</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>185</fpage><lpage>193</lpage><history><date date-type="received" iso-8601-date="2026-03-19"><day>19</day><month>03</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-04-06"><day>06</day><month>04</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Cherkaev G.V., Tran H.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Черкаев Г.В., Чан Х.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Cherkaev G.V., Tran H.</copyright-holder><copyright-holder xml:lang="ru">Черкаев Г.В., Чан Х.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://vietnamjournal.ru/2414-1437/article/view/704727">https://vietnamjournal.ru/2414-1437/article/view/704727</self-uri><abstract xml:lang="en"><p><bold>Background:</bold> Increasing environmental requirements for marine power plants stimulate the search for alternative fuels capable of reducing harmful emissions without considerable modifications of diesel engines.</p> <p><bold>Aim:</bold> This study aimed to analyze and compare the environmental performance indicators of the marine diesel engine L136TL when operating on conventional diesel fuel (DO) and SME B5 biofuel.</p> <p><bold>Methods:</bold> The study is based on numerical simulation of the engine working cycle using the specialized Diesel-RK software. The simulation takes into account the physical and chemical properties of fuels, fuel injection characteristics, and gas exchange parameters.</p> <p><bold>Results:</bold> The calculations provided pressure and temperature variations in the cylinder, heat release rate characteristics, as well as nitrogen oxide (NOx) concentration and particulate matter (PM) emissions for both fuel types. The results demonstrate that the use of SME B5 biofuel leads to lower NOx and PM emissions compared with conventional diesel fuel.</p> <p><bold>Conclusion:</bold> Biofuel SME B5 can be considered a promising alternative fuel for marine diesel engines, allowing a reduction in environmental impact while maintaining acceptable engine performance characteristics.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Актуальность.</bold> Ужесточение экологических требований к судовым энергетическим установкам требует поиска альтернативных видов топлива, позволяющих снизить выбросы вредных веществ без значительных конструктивных изменений двигателей.</p> <p><bold>Цель. </bold>Провести анализ и сравнение экологических показателей судового дизельного двигателя L136TL при использовании обычного дизельного топлива DO и биотоплива SME B5.</p> <p><bold>Методы. </bold>Исследование выполнено на основе численного моделирования рабочего цикла двигателя с использованием специализированного программного комплекса Diesel-RK. В расчётах учитывались физико-химические свойства топлива, параметры топливоподачи и характеристики газообмена двигателя.</p> <p><bold>Результаты. </bold>Получены зависимости давления и температуры в цилиндре, скорости тепловыделения, а также концентраций оксидов азота (NO<italic><sub>x</sub></italic>) и твёрдых частиц при работе двигателя на двух видах топлива. Установлено, что использование биотоплива SME B5 приводит к снижению выбросов NO<italic><sub>x</sub></italic> и твёрдых частиц по сравнению с обычным дизельным топливом.</p> <p><bold>Выводы. </bold>Показано, что биотопливо SME B5 можно рассматривать как перспективную альтернативу традиционному дизельному топливу для судовых энергетических установок, обеспечивая снижение экологической нагрузки при сохранении приемлемых эксплуатационных характеристик двигателя.</p></trans-abstract><kwd-group xml:lang="en"><kwd>marine engine</kwd><kwd>biofuel</kwd><kwd>environmental performance indicators</kwd><kwd>NOx emission</kwd><kwd>soot content</kwd><kwd>Diesel-RK</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>судовой двигатель</kwd><kwd>биотопливо</kwd><kwd>экологические показатели</kwd><kwd>выбросы NOx</kwd><kwd>содержание сажи</kwd><kwd>Diesel-RK</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Reddy CV, Reddy DPK, Srinadh M, et al. 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