The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform
Haji Hassan Masjuki - One of the best experts on this subject based on the ideXlab platform.
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an overview of Engine Durability and compatibility using biodiesel bioethanol diesel blends in compression ignition Engines
Energy Conversion and Management, 2016Co-Authors: S. Dharma, Haji Hassan Masjuki, Hwai Chyuan Ong, A.h. Sebayang, Arridina Susan SilitongaAbstract:The realization of declining fossil fuel supplies and the adverse impact of fossil fuels on the environment has accelerated research and development activities in renewable energy sources and technologies. Biofuels are renewable fuels made from edible, non-edible or waste oils, as well as animal fats and algae, and these fuels have been proven to be good substitutes for fossil fuels in the transportation sector. Bioethanol and biodiesels have gained worldwide attention in order to address environmental issues associated with fossil fuels, provide energy security, reduce imports and rural employment, as well as improve agricultural economy. Bioethanol has high oxygen content and octane content up to 35% and 108, respectively and hence, it increases oxygenation and improves combustion of fuel. In addition, bioethanol has lower vaporization pressure, which reduces the risks associated with evaporative emissions. In contrast, biodiesel has good lubricity, which helps protect the surface of Engine components from wear and friction. The use of biodiesel–bioethanol–petroleum diesel blends poses a greater challenge with regards to improving the compatibility of the materials with the fuel system in compression ignition (CI) and spark ignition (SI) Engines. In this work, the technical conditions of an Engine (i.e. Engine deposits, wear of the Engine components and quality of the lubrication oil) are assessed by the application of with biodiesel–bioethanol–petroleum diesel blends. It is deemed important to evaluate the effects of using bioethanol and biodiesels in diesel Engines. This paper provides insight on the feasibility of biodiesel and bioethanol feedstocks, the compatibility of biodiesels, bioethanol and their blends with diesel Engines as well as the physicochemical properties of these fuels.
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An overview of Engine Durability and compatibility using biodiesel–bioethanol–diesel blends in compression-ignition Engines
Energy Conversion and Management, 2016Co-Authors: S. Dharma, Haji Hassan Masjuki, Hwai Chyuan Ong, A.h. Sebayang, Arridina Susan SilitongaAbstract:The realization of declining fossil fuel supplies and the adverse impact of fossil fuels on the environment has accelerated research and development activities in renewable energy sources and technologies. Biofuels are renewable fuels made from edible, non-edible or waste oils, as well as animal fats and algae, and these fuels have been proven to be good substitutes for fossil fuels in the transportation sector. Bioethanol and biodiesels have gained worldwide attention in order to address environmental issues associated with fossil fuels, provide energy security, reduce imports and rural employment, as well as improve agricultural economy. Bioethanol has high oxygen content and octane content up to 35% and 108, respectively and hence, it increases oxygenation and improves combustion of fuel. In addition, bioethanol has lower vaporization pressure, which reduces the risks associated with evaporative emissions. In contrast, biodiesel has good lubricity, which helps protect the surface of Engine components from wear and friction. The use of biodiesel–bioethanol–petroleum diesel blends poses a greater challenge with regards to improving the compatibility of the materials with the fuel system in compression ignition (CI) and spark ignition (SI) Engines. In this work, the technical conditions of an Engine (i.e. Engine deposits, wear of the Engine components and quality of the lubrication oil) are assessed by the application of with biodiesel–bioethanol–petroleum diesel blends. It is deemed important to evaluate the effects of using bioethanol and biodiesels in diesel Engines. This paper provides insight on the feasibility of biodiesel and bioethanol feedstocks, the compatibility of biodiesels, bioethanol and their blends with diesel Engines as well as the physicochemical properties of these fuels.
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Feasibility of bioethanol and biobutanol as transportation fuel in spark-ignition Engine: a review
RSC Adv., 2015Co-Authors: M. N. A. M. Yusoff, Nurin Wahidah Binti Mohd Zulkifli, B.m. Masum, Haji Hassan MasjukiAbstract:Fossil fuels depletion is a globally main issue because it is the primary transportation fuel. Furthermore, environmental issues including global warming and climate changes are problems that need to be dealt with immediately. Therefore, biofuels (bio-based fuels), i.e. bio-alcohols (bioethanol and biobutanol) which are produced from natural materials have emerged as promising transportation fuels because of their sustainability and environmental benefits which can reduce the dependency on crude oil reserves. Today, bioethanol is widely used as an option for transportation fuel or additives to gasoline in spark ignition (SI) Engine due to its attractive properties of high octane number and reduced exhaust emissions. The next promising and competitive biofuel is biobutanol which has superior properties to be used in SI Engine without Engine modification. The aim of the present review is to highlight on the feasibility of the bioethanol and biobutanol as alternative transportation fuels in SI Engine. The first section of this paper is an overview on bioethanol and biobutanol as gasoline alternatives. In the next section, comparative physicochemical properties of gasoline, bioethanol and biobutanol and their potential sources of production are presented. The effect of bioethanol and biobutanol with gasoline blends on Engine performances, combustion analysis, exhaust emissions, Engine Durability and their effect on lubricating oil are discussed in the next section. The review study acknowledges that the bioethanol and biobutanol are capable of improving Engine performances, combustion and also reducing exhaust emissions. However, the addition of alcohols in fuel blends leads to negative impacts on the Engine Durability and lubricating oil properties.
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Effect of biodiesel from various feedstocks on combustion characteristics, Engine Durability and materials compatibility: A review
Renewable & Sustainable Energy Reviews, 2013Co-Authors: M. Mofijur, Haji Hassan Masjuki, Abul Kalam, A.e. Atabani, M. Shahabuddin, S.m. Palash, M.a. HazratAbstract:The global energy consumption is expected to grow in a faster rate than the population growth. By 2030, an increase of 53% of global energy consumption and 39% of greenhouse gases emissions from fossil fuels is anticipated. Therefore, it becomes a global agenda to develop clean alternative fuels which are domestically available, environmentally acceptable and technically feasible. As an alternative fuel, biodiesel seems as one of the best choices among other sources due to its environment friendly behavior and similar functional properties with diesel. The main objective of this paper is to discuss the impact biodiesel from different edible, non-edible and waste cooking oils feedstocks on combustion characteristics, Engine Durability and materials compatibility with biodiesel. Moreover, this paper reviews some other important related aspects to biodiesel such as biodiesel development, biodiesel feedstocks, biodiesel standards and advantages and challenges of biodiesel.
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biodiesel feasibility study an evaluation of material compatibility performance emission and Engine Durability
Renewable & Sustainable Energy Reviews, 2011Co-Authors: M A Fazal, A.s.m.a. Haseeb, Haji Hassan MasjukiAbstract:Biodiesel, derived from the transesterification of vegetable oils or animal fats, is composed of saturated and unsaturated long-chain fatty acid alkyl esters. In spite of having some application problems, recently it is being considered as one of the most promising alternative fuels in internal combustion Engine. From scientific literatures, this paper has collected and analyzed the data on both advantages and disadvantages of biodiesel over conventional diesel. Since the aim of this study is to evaluate the biodiesel feasibility in automobiles, the first section is dedicated to materials compatibility in biodiesel as compared to that in diesel. The highest consensus is related to enhanced corrosion of automotive parts due to its compositional differences. In the subsequent sections, data on performance, emission and Engine Durability have been analyzed and compared. In this case, the highest consensus is found in reducing emissions as well as in increasing moving parts sticking, injector coking and filter plugging. This paper has also summarized the factors of biodiesel in contributing these technical performances.
Tielong Shen - One of the best experts on this subject based on the ideXlab platform.
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A fuzzy logic map-based knock control for spark ignition Engines
Applied Energy, 2020Co-Authors: Benjamí N Pla, Pau Bares, Irina Jiménez, Carlos Guardiola, Yahui Zhang, Tielong ShenAbstract:Abstract Knock control represents one of the most critical aspects to reach optimal thermal efficiency in spark ignition Engines, and its research is crucially important because it determines thermal efficiency, Engine Durability, and power density, as well as noise and emission performance. In this paper, a spark advance control based on a map learning technique is combined with a knock estimator to maximize the Engine efficiency while keeping the knock probability below a desired limit. The proposed controller is experimentally validated on a production spark ignition gasoline Engine test bench, and compared with a conventional spark advance controller in both, steady and transient conditions. From experimental results, a benefit in terms of thermal efficiency, control stability and Engine security are achieved. The results show that the proposed method is capable of regulating the knock probability to a target percentage with low spark advance and thermal efficiency dispersion than the conventional controller.
Benjamí N Pla - One of the best experts on this subject based on the ideXlab platform.
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A fuzzy logic map-based knock control for spark ignition Engines
Applied Energy, 2020Co-Authors: Benjamí N Pla, Pau Bares, Irina Jiménez, Carlos Guardiola, Yahui Zhang, Tielong ShenAbstract:Abstract Knock control represents one of the most critical aspects to reach optimal thermal efficiency in spark ignition Engines, and its research is crucially important because it determines thermal efficiency, Engine Durability, and power density, as well as noise and emission performance. In this paper, a spark advance control based on a map learning technique is combined with a knock estimator to maximize the Engine efficiency while keeping the knock probability below a desired limit. The proposed controller is experimentally validated on a production spark ignition gasoline Engine test bench, and compared with a conventional spark advance controller in both, steady and transient conditions. From experimental results, a benefit in terms of thermal efficiency, control stability and Engine security are achieved. The results show that the proposed method is capable of regulating the knock probability to a target percentage with low spark advance and thermal efficiency dispersion than the conventional controller.
T. M. Yonushonis - One of the best experts on this subject based on the ideXlab platform.
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Thick thermal barrier coatings for diesel components
1991Co-Authors: T. M. YonushonisAbstract:An Engineered thick thermal barrier coating consisting of multiple layers of zirconia and CoCrAlY with a zirconia top layer and having a system thermal conductance less than 410 w/m(exp 2)K exceeded the 100 hour Engine Durability goals set forth in this program. The thermal barrier coatings were intact at the test conclusion. Back to back single cylinder research Engine tests were conducted with watercooled, metal hardware and oil-cooled, thermal barrier coating insulated hardware to determine apparent heat release and fuel economy. Apparent heat release data revealed that the insulated Engine had a shorter ignition delay and a longer combustion duration than the metal Engine. The insulated Engine fuel economy was approximately two percent worse on average for this series of tests. There was no attempt to optimize Engine efficiency of the insulated Engine by modifying the Engine timing, coating, or other techniques.
Patrick G. Szymkowicz - One of the best experts on this subject based on the ideXlab platform.
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Characterization of Soot Deposition and Particle Nucleation in Exhaust Gas Recirculation Coolers
Aerosol Science and Technology, 2012Co-Authors: Anil Singh Bika, Alok Warey, David Long, Sandro Balestrino, Patrick G. SzymkowiczAbstract:Cooled exhaust gas recirculation (EGR) is used to control Engine out NOx (oxides of nitrogen) emissions from modern diesel Engines by re-circulating a portion of the exhaust gases into the intake manifold of an Engine after cooling it through a heat exchanger commonly referred to as an EGR cooler. However, EGR cooler fouling due to presence of soot particles and hydrocarbons (HC) in Engine exhaust leads to a decrease in cooler efficiency and increased pressure drop across the cooler. This can adversely affect the combustion process, Engine Durability, and emissions. In this study, a multicylinder diesel Engine was used to produce a range of Engine out HC and soot concentrations to investigate soot deposition and particle nucleation in an EGR cooler. A portion of the Engine exhaust was passed through an EGR cooler, while particle size and HC concentration measurements were made at the cooler inlet and outlet. Tests were conducted over a range of EGR cooler coolant temperatures and Engine out soot and HC co...
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A One-Dimensional Model for Particulate Deposition and Hydrocarbon Condensation in Exhaust Gas Recirculation Coolers
Aerosol Science and Technology, 2012Co-Authors: Alok Warey, Sandro Balestrino, Patrick G. Szymkowicz, M. R. MalayeriAbstract:Cooled exhaust gas recirculation (EGR) is widely used in diesel Engines to control Engine out NOx (oxides of nitrogen) emissions. A portion of the exhaust gases is recirculated into the intake manifold of the Engine after cooling it through a heat exchanger. EGR cooler heat exchangers, however, tend to lose efficiency and have increased pressure drop as deposit forms on the heat exchanger surface. This adversely affects the combustion process, Engine Durability, and emissions. In this study, a 1-D model was developed to simulate soot deposition, soot removal, and condensation of several hydrocarbon (HC) species in a circular tube with turbulent gas flow at constant wall temperature. The circular tube, which makes up the computational domain in the model, represents a single channel from any EGR cooler geometry. The model takes into account soot particle deposition due to thermophoresis, diffusion, turbulent impaction, and gravitational drift. However, thermophoresis was found to be the most dominant depos...