Multiobjective Optimization of Hydrogen‐Assisted Calophyllum inophyllum Biodiesel Operation in a Compression Ignition Engine.
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| Title: | Multiobjective Optimization of Hydrogen‐Assisted Calophyllum inophyllum Biodiesel Operation in a Compression Ignition Engine. |
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| Authors: | Naga Kumar, C.1 (AUTHOR), Dayadi, Nageswara Rao2 (AUTHOR), Babu, J. M.3 (AUTHOR), Yarram, Srinivasa Reddy4 (AUTHOR), Chintalapudi, Ravikiran5 (AUTHOR), Pappula, Bridjesh6 (AUTHOR) epappub@unisa.ac.za |
| Source: | Energy Science & Engineering. Jun2026, Vol. 14 Issue 6, p2897-2929. 33p. |
| Subject Terms: | *Multi-objective optimization, *Calophyllum inophyllum, *Multiple criteria decision making, *Automobile engine performance, *Greenhouse gas mitigation, *Biodiesel fuels, *Diesel motors |
| Abstract: | This study investigates operating conditions for a diesel engine running in tri‐fuel mode with diesel, Calophyllum inophyllum biodiesel (0–30 vol%), and inducted hydrogen (0–15 L·min−1) over 0%–100% load (20% steps), yielding 96 steady‐state points. Brake thermal efficiency (BTE), brake‐specific fuel consumption, exhaust gas temperature, and regulated emissions (NOx, HC, CO, CO2, and smoke) were measured. To avoid dependence on a single, fixed objective weighting, Bootstrapped Empirical Multiobjective Ranking and Selection (BEMORS) was applied using percentile scaling, Pareto screening, and Dirichlet preference weights under baseline, NOx‐biased, and NOx, along with smoke‐biased scenarios. Stochastic Multicriteria Acceptability Analysis benchmarking was used to check ranking consistency. Hydrogen enrichment increased BTE and decreased CO, HC, and smoke across loads, while tending to increase NOx. Increasing biodiesel fraction has also decreased smoke, CO, and HC, but increased fuel consumption due to lower heating value. BEMORS identified 40% load with high hydrogen induction and low biodiesel fraction as the compromise across preference scenarios, whereas high‐load hydrogen addition scenarios were attractive when smoke scenarios dominate priorities. Combining tri‐fuel experiments with preference‐uncertain selection provides practical and implementable operating corridors that are competitive when regulatory emphasis shifts and quantifies the suitability of recommendations within the tested steady‐state conditions. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 194418749 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Multiobjective Optimization of Hydrogen‐Assisted Calophyllum inophyllum Biodiesel Operation in a Compression Ignition Engine. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Naga+Kumar%2C+C%2E%22">Naga Kumar, C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dayadi%2C+Nageswara+Rao%22">Dayadi, Nageswara Rao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Babu%2C+J%2E+M%2E%22">Babu, J. M.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yarram%2C+Srinivasa+Reddy%22">Yarram, Srinivasa Reddy</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chintalapudi%2C+Ravikiran%22">Chintalapudi, Ravikiran</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pappula%2C+Bridjesh%22">Pappula, Bridjesh</searchLink><relatesTo>6</relatesTo> (AUTHOR)<i> epappub@unisa.ac.za</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energy+Science+%26+Engineering%22">Energy Science & Engineering</searchLink>. Jun2026, Vol. 14 Issue 6, p2897-2929. 33p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Multi-objective+optimization%22">Multi-objective optimization</searchLink><br />*<searchLink fieldCode="DE" term="%22Calophyllum+inophyllum%22">Calophyllum inophyllum</searchLink><br />*<searchLink fieldCode="DE" term="%22Multiple+criteria+decision+making%22">Multiple criteria decision making</searchLink><br />*<searchLink fieldCode="DE" term="%22Automobile+engine+performance%22">Automobile engine performance</searchLink><br />*<searchLink fieldCode="DE" term="%22Greenhouse+gas+mitigation%22">Greenhouse gas mitigation</searchLink><br />*<searchLink fieldCode="DE" term="%22Biodiesel+fuels%22">Biodiesel fuels</searchLink><br />*<searchLink fieldCode="DE" term="%22Diesel+motors%22">Diesel motors</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study investigates operating conditions for a diesel engine running in tri‐fuel mode with diesel, Calophyllum inophyllum biodiesel (0–30 vol%), and inducted hydrogen (0–15 L·min−1) over 0%–100% load (20% steps), yielding 96 steady‐state points. Brake thermal efficiency (BTE), brake‐specific fuel consumption, exhaust gas temperature, and regulated emissions (NOx, HC, CO, CO2, and smoke) were measured. To avoid dependence on a single, fixed objective weighting, Bootstrapped Empirical Multiobjective Ranking and Selection (BEMORS) was applied using percentile scaling, Pareto screening, and Dirichlet preference weights under baseline, NOx‐biased, and NOx, along with smoke‐biased scenarios. Stochastic Multicriteria Acceptability Analysis benchmarking was used to check ranking consistency. Hydrogen enrichment increased BTE and decreased CO, HC, and smoke across loads, while tending to increase NOx. Increasing biodiesel fraction has also decreased smoke, CO, and HC, but increased fuel consumption due to lower heating value. BEMORS identified 40% load with high hydrogen induction and low biodiesel fraction as the compromise across preference scenarios, whereas high‐load hydrogen addition scenarios were attractive when smoke scenarios dominate priorities. Combining tri‐fuel experiments with preference‐uncertain selection provides practical and implementable operating corridors that are competitive when regulatory emphasis shifts and quantifies the suitability of recommendations within the tested steady‐state conditions. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=194418749 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/ese3.70511 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 33 StartPage: 2897 Subjects: – SubjectFull: Multi-objective optimization Type: general – SubjectFull: Calophyllum inophyllum Type: general – SubjectFull: Multiple criteria decision making Type: general – SubjectFull: Automobile engine performance Type: general – SubjectFull: Greenhouse gas mitigation Type: general – SubjectFull: Biodiesel fuels Type: general – SubjectFull: Diesel motors Type: general Titles: – TitleFull: Multiobjective Optimization of Hydrogen‐Assisted Calophyllum inophyllum Biodiesel Operation in a Compression Ignition Engine. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Naga Kumar, C. – PersonEntity: Name: NameFull: Dayadi, Nageswara Rao – PersonEntity: Name: NameFull: Babu, J. M. – PersonEntity: Name: NameFull: Yarram, Srinivasa Reddy – PersonEntity: Name: NameFull: Chintalapudi, Ravikiran – PersonEntity: Name: NameFull: Pappula, Bridjesh IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20500505 Numbering: – Type: volume Value: 14 – Type: issue Value: 6 Titles: – TitleFull: Energy Science & Engineering Type: main |
| ResultId | 1 |
