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181,667 results

103. A Service-Based Modelling Approach to Ease the Certification of Multi-Core COTS Processors

Author

Nathanaël Sensfelder, Kevin Delmas, Claire Pagetti, Thomas Polacsek, Frédéric Boniol, Youcef Bouchebaba, Julien Brunel, ONERA / DTIS, Université de Toulouse [Toulouse], ONERA-PRES Université de Toulouse, Génie Informatique, École Polytechnique de Montréal (EPM)-Centre de Recherche en Informatique (CRI), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées

Subjects
CERTIFICATION, Service (systems architecture), Multi-core processor, METHODE FORMELLE, Computer science, 020207 software engineering, 0102 computer and information sciences, 02 engineering and technology, Certification, 01 natural sciences, [INFO.INFO-CL]Computer Science [cs]/Computation and Language [cs.CL], Argumentation theory, 010201 computation theory & mathematics, Salient, MULTI-COEURS, 0202 electrical engineering, electronic engineering, information engineering, Systems engineering, Position paper, Adaptation (computer science), Combinatorial explosion
Abstract

International audience; The Phylog project aims at offering a model-based software-aided certification framework for aeronautical systems based on multi/many-core architectures. Certifying such platforms will entail fulfilling the high level objectives of the MCP-CRI / CAST-32A position paper. Among those, two types of analysis are required: interference and safety analyses. Because of the large size of the platforms and their complexity, those analyses can lead to combinatorial explosion and to some misinterpretation. To tackle these issues, we explore a service-based modelling approach that leads to a simplification of the analyses and to the highlighting of salient properties, making the adaptation of the certification argumentation efficient.

Published
2019

129. Combustion Characteristics of Cottonseed Biodiesel and Chicken Fat Biodiesel Mixture in a Multi-Cylinder Compression Ignition Engine

Author

Abul Kalam Hossain and Kemal Masera

Subjects
Biodiesel, Thermal efficiency, Diesel fuel, Materials science, Chicken fat, Indirect injection, Combustion, Pulp and paper industry, Diesel engine, Cetane number
Abstract

Although waste animal fats such as chicken fat are promising alternative energy sources, biodiesels produced from these type of feedstocks hardly satisfies the EN14214 biodiesel standards. In this study, biomixtures were prepared by blending cottonseed biodiesel and chicken rendering fat biodiesel which were produced via transesterification method. Biodiesels were blended with each other at 60/40, 50/50 and 30/70 volume ratios to produce CO60CH40, CO50CH50 and CO30CH70 fuels. First, fuel properties of the neat biodiesels and novel biomixtures were measured and compared to European biodiesel standards and diesel. Then, the engine performance, combustion characteristics and exhaust emissions of these novel biomixture fuels were measured in a three-cylinder indirect injection diesel engine under various engine loads and at constant speed of 1500 rpm. The fuel characterisation showed that CO60CH40 and CO50CH50 biomixtures met the European standards. The Brake Specific Energy Consumption (BSEC) and Brake Thermal Efficiency (BTE) of all biomixtures were comparable with CO100, CH100 and diesel at the full engine load. The combustion results revealed that the maximum in-cylinder pressure and energy release values of the CO50CH50 were 4.2% and 4.4% higher than the diesel at full engine load because of optimised fuel properties of biomixture such as molecular structure, viscosity, cetane number and iodine value. CO50CH50 had 2.9% reduced CO 2 and comparable CO emission compared to diesel, which were also 5.6% and 13% lower than cottonseed biodiesel respectively. However, NO emission of CO50CH50 was found 3.8% and 5.8% higher than diesel and cottonseed biodiesel. A 6.5% reduction on NO emission was observed when CO60CH40 biomixture fuel was used instead of diesel. To conclude, this research showed that blending of cottonseed and chicken fat biodiesels is a promising approach to meet the EN14214 standards, improve in-cylinder pressure, optimise energy release and reduce exhaust emissions. Blending of different biodiesels will be tested as a future work.

Published
2019

131. Development of Diesel-Ethanol Engine for HCV

Author

S. D. Rairikar, Sukrut S Thipse, Shailesh Balkrishna Sonawane, K. P. Kavathekar, Debjyoti Bandyopadhyay, P. S. Sutar, and Neelkanth V Marathe

Subjects
chemistry.chemical_compound, Diesel fuel, Ethanol, chemistry, Environmental science, Pulp and paper industry
Published
2019

132. Preliminary Investigation of a Bio-Based Low Sulfur Heavy Fuel Oil

Author

Mcm Michel Cuijpers, Michael Boot, M Michael Golombok, Hhjgm van Avendonk, Power & Flow, and Group Deen

Subjects
Materials science, Waste management, business.industry, Heavy fuel oil, lignin, solvolysis, Biomass, chemistry.chemical_element, Fuel oil, Raw material, subcritical water, SDG 14 – Leven onder water, Pulp and paper industry, Sulfur, Renewable energy, Cracking, Diesel fuel, chemistry, sulfur, Heat of combustion, SDG 7 - Affordable and Clean Energy, SDG 14 - Life Below Water, business, SDG 7 – Betaalbare en schone energie
Abstract

Recently introduced sulfur caps on marine fuels in so-called sulfur emission control areas (SECAs) are forcing shipping companies to sail on more or less automotive grade diesel in lieu of the considerably less expensive, but sulfur-laden heavy fuel oil (HFO) to which they were accustomed. This development is an opportunity for a bio-based substitute, given that most biomass is sulfur free by default. Moreover, given that biomass is typically solid to start with, cracking it to an HFO grade, which is highly viscous in nature, will involve fewer and/or less harsh process steps than would be the case if an automotive grade fuel were to be targeted. In this study, a renewable low sulfur heavy fuel oil (LSHFO) has been produced by means of subcritical water assisted lignin depolymerization in the presence of a short length surfactant, ethylene glycol monobutyl ether (EGBE). The resulting oil contains a lignin derived content of 75 wt.-%, with the remainder consisting of EGBE and water (reusable). The derived LSHFO has a 20% higher heating value than the lignin feedstock. It is still roughly 20% and 30% lower when compared to the HFO and low sulfur marine gas oil (LSMGO) benchmarks, respectively. The lower heating value can be attributed to the fuel bond oxygen (10%) and water present in the LSHFO. Viscosity and sulfur levels, however, are within the HFO and LSMGO range and target respectively. Future work will examine what impact lignin particle size and surfactant type/concentration will have on the results.Graphical abstract

Published
2017

136. Diesel Fuel Improvers and Their Effect on Microbial Stability of Diesel/Biodiesel Blends

Author

George S. Dodos, Chrysovalanti E. Tsesmeli, and Fanourios Zannikos

Subjects
Biodiesel, Diesel fuel, 020303 mechanical engineering & transports, Materials science, 0203 mechanical engineering, 020209 energy, 0202 electrical engineering, electronic engineering, information engineering, 02 engineering and technology, Pulp and paper industry
Published
2018

138. Investigation of a Naturally Aspirated Diesel Engine Fueled with Blends of Thevetia Peruviana Seed Oil under 8-Mode Testing Cycle

Author

Sundararaj Senthilkumar, Rohit Sreenivas, Martin Stanley Jerome, and Chandraseelan Edison R

Subjects
Thevetia, 020401 chemical engineering, biology, Chemistry, 020209 energy, 0202 electrical engineering, electronic engineering, information engineering, Naturally aspirated engine, 02 engineering and technology, 0204 chemical engineering, biology.organism_classification, Diesel engine, Pulp and paper industry
Published
2018

142. Process Optimization of Biodiesel Production from Cedar Wood Oil (Cedrus deodara) Using Response Surface Methodology

Author

Tarun Mehra

Subjects
biology, Cedrus deodara, 0211 other engineering and technologies, 02 engineering and technology, biology.organism_classification, Pulp and paper industry, 020303 mechanical engineering & transports, Cedar wood, 0203 mechanical engineering, Biodiesel production, Environmental science, Process optimization, 021108 energy, Response surface methodology
Published
2018

143. Study of Gasoline Particulate Matter Index with Refinery Blends

Author

Yu Shi, Bradley L. Oakland Taylor, and Angel Cortes-Morales

Subjects
020303 mechanical engineering & transports, Index (economics), 0203 mechanical engineering, 020209 energy, 0202 electrical engineering, electronic engineering, information engineering, Environmental science, 02 engineering and technology, Particulates, Gasoline, Pulp and paper industry, Refinery
Published
2018

144. Oxidative Deterioration Properties of FAME-Blended Diesel Fuel

Author

Tatsuki Sugiura and Yoichiro Nakamura

Subjects
Diesel fuel, 020303 mechanical engineering & transports, 0203 mechanical engineering, Chemistry, 020209 energy, 0202 electrical engineering, electronic engineering, information engineering, 02 engineering and technology, Pulp and paper industry
Published
2018

146. Influence of Injection Timing on the Engine Efficiency and Emissions in a SI PFI Engine Using Ethanol-Gasoline Blends with Several Water Content Levels

Author

Rafael Serralvo Neto, Rafael C. R. Berti, Luana C. X. Camargos, Luiz Rafael Marinsek, Clayton Barcelos Zabeu, and Renan L. Nicola

Subjects
020303 mechanical engineering & transports, 0203 mechanical engineering, Engine efficiency, 020209 energy, 0202 electrical engineering, electronic engineering, information engineering, Environmental science, Ethanol fuel, 02 engineering and technology, Pulp and paper industry, Water content
Published
2017

147. Regulated and Unregulated Emissions from a Spark Ignition Engine Fueled with Acetone-Butanol-Ethanol (ABE)-Gasoline Blends

Author

Yuanxu Li, Chia-Fon Lee, Zhi Ning, Karthik Nithyanandan, and Han Wu

Subjects
Ethanol, 020209 energy, Butanol, 02 engineering and technology, Pulp and paper industry, Automotive engineering, chemistry.chemical_compound, 020303 mechanical engineering & transports, 0203 mechanical engineering, chemistry, Spark-ignition engine, 0202 electrical engineering, electronic engineering, information engineering, Acetone, Environmental science, Gasoline
Published
2017

148. Influence of the Methanol Proportion on the Combustion Characteristics of Methanol-Biodiesel -F-T Diesel Blended Fuel

Author

Gao Ji, Jing Qiao, Tiantian Yang, Yizhuo Feng, Dandan Sun, and Tie Wang

Subjects
Alcohol fuel, Biodiesel, 020209 energy, 02 engineering and technology, Combustion, Pulp and paper industry, Diesel fuel, chemistry.chemical_compound, 020401 chemical engineering, chemistry, 0202 electrical engineering, electronic engineering, information engineering, Environmental science, Methanol, 0204 chemical engineering
Published
2017

149. Investigating the Impact of Ethanol on the Lubricity of Gasoline and on the Lubricity Improvers Efficiency

Author

Pauline Caine, Thomas Dubois, and Lidwine Abiad

Subjects
chemistry.chemical_compound, 020303 mechanical engineering & transports, Ethanol, Materials science, Lubricity, 0203 mechanical engineering, chemistry, 020209 energy, 0202 electrical engineering, electronic engineering, information engineering, 02 engineering and technology, Gasoline, Pulp and paper industry
Published
2017

150. Evaluation of the Stability and Ignition Quality of Diesel-Biodiesel-Butanol Blends

Author

Fanourios Zannikos, Chrysovalanti E. Tsesmeli, Dimitrios Karonis, George S. Dodos, Theodora Tyrovola, and Iraklis Zahos Siagos

Subjects
Biodiesel, Materials science, 020209 energy, media_common.quotation_subject, Butanol, 02 engineering and technology, Pulp and paper industry, law.invention, Ignition system, chemistry.chemical_compound, Diesel fuel, 020303 mechanical engineering & transports, 0203 mechanical engineering, chemistry, law, 0202 electrical engineering, electronic engineering, information engineering, Quality (business), media_common
Published
2017