Huynh Thanh Cong HCMUT - Academia.edu (original) (raw)
Papers by Huynh Thanh Cong HCMUT
2020 5th International Conference on Green Technology and Sustainable Development (GTSD)
Vehicle contributes greatly to the rapid and strong economic development and other aspects of soc... more Vehicle contributes greatly to the rapid and strong economic development and other aspects of society. Besides, the operation of the transport impact on health and the environment seriously. Therefore, the study of solutions to improve fuel efficiency and environmental protection is one of the most focusing issues. The main objective of this paper is to present the theoretical fundamentals related to the design and development of a two-stroke free-piston engine (FPE) for electrical power generation. In this study, the prototype engine has been conducted with a power of 1.5kW, a bore size of 34mm, and a maximum possible stroke of 28mm using gasoline as fuel. In the future, this engine will be going to take advantage of excess biogas to generate electricity for production activities and daily life. The research has completed the initial intentions such as a theoretical investigation, calculation, determination of the engine model, and starting mechanism. Preliminary results have confirmed the feasibility of proposing the FPE model.
The Korean Hydrogen And New Energy Society, Sep 1, 2007
2019 7th International Conference on Control, Mechatronics and Automation (ICCMA), 2019
Sorting and Classification of mango, there are different colors, weights, sizes, shapes and densi... more Sorting and Classification of mango, there are different colors, weights, sizes, shapes and densities. Currently, classification based on the above features is being carried out mainly by manuals due to farmers’ awareness of low accuracy, high costs, health effects and high costs, costly economically inferior. The internal quality of the mango such as sweetness, hardness, age, brittleness… is very important but is only estimated by external or human-perceived evaluation. Therefore, it is necessary to use artificial neural networks to solve this problem. This study was conducted on three main commercial mango species of Vietnam to find out the method of classification of mango with the best quality and accuracy. World studies of mango classification according to color, size, volume and almost done in the laboratory but not yet applied in practice. The quality assessment of mango fruit has not been resolved. Application of image processing technology, computer vision combined with artificial intelligence in the problem of mango classification or poor quality. The goal of the study is to create a system that can classify mangoes in terms of color, volume, size, shape and fruit density. The classification system using image processing incorporates artificial intelligence including the use of CCD cameras, C language programming, computer vision and artificial neural networks. The system uses the captured mango image, processing the split layer to determine the mass, volume and defect on the mango fruit surface. Especially, determine the density of mangoes related to its maturity and sweetness and determine the percentage of mango defects to determine the quality of mangoes for export and domestic or recycled mangoes.
2017 International Conference on System Science and Engineering (ICSSE), 2017
This paper presents the development of velocity - time measuring system for motorcycles and the p... more This paper presents the development of velocity - time measuring system for motorcycles and the potential of proposing a driving cycle for motorcycles in Ho Chi Minh City. Motorcycles are the major mean of transport, but they are also the main source of air pollution in the biggest cities in Vietnam. Nowadays, the high levels of fuel consumption and air pollution are the most important problems that characterized the urban areas of both developed and developing countries. In this work, a velocity time measuring system is developed for tracking the change of velocity as a function of time. This system is studied using (1) Velocity sensor: magnetic type converted analog signal to digital/pulse signal sending to Arduino circuit; (2) Accelerator sensor: measured accelerator for three axis (x, y, z) and sending to Arduino via standard of I2C; (3) Arduino: receiving and processing the measured signal and communicating smart phone via Bluetooth; (4) Smart phone/receiver using android operating system: receiving the signal via Bluetooth and estimating the concerned parameters and monitoring the measured/estimated results. The preliminary results are useful to evaluate for better understanding the current status and further development for driving cycle for motorcycle.
To analyze the influence of valve overlap period on a backfire occurrence, the single cylinder re... more To analyze the influence of valve overlap period on a backfire occurrence, the single cylinder research engine with MCVVT(Mechanical Continuous Variable Valve Timing) system is developed and backfire limit equivalence ratio defined as fuel-air ratio equivalence ratio at which backfire occurs is examined according to various valve overlap period. The MCVVT is the system to control valve overlap period by mechanical device. It is estimated that the lower valve overlap period has the higher backfire limit equivalence ratio though the same energy is supplied. When the valve overlap period is changed from 30° CA to 0° CA, backfire limit equivalence ratio is increased 74%, approximately. It means that valve overlap period is concern in backfire occurrence, and may be one of the methods for controlling back fire occurred in a H₂ engine.
In order to develop an external mixture type hydrogen engine with high performance, the character... more In order to develop an external mixture type hydrogen engine with high performance, the characteristics of performance and combustion are investigated for various valve overlap period by using Hz engine installed a mechanical continuous variable valve timing system. In experiments, valve overlap periods are analogically varied for 0° to 400°CA by 10°CA with the same amount of supplied energy as valve overlap period of O°CA, fuel-air equivalence ratio of 0.3 to backfire limit equivalence ratio. The obtained results show that by using a similarly low supplied energy, the tendencies of the basic qualitative performance and combustion characteristics are similar to conventional engines using petroleum fuel, but quantitative results give a little difference. The backfire limit equivalence ratio (defined as the upper limit of fuel-air equivalence ratio just before backfire occurs) was also improved significantly with decrease of valve overlap period and/or for operating conditions with th...
In order to verify the feasibility of expansion of back-fire limit equivalence ratio in the hydro... more In order to verify the feasibility of expansion of back-fire limit equivalence ratio in the hydrogen-fueled engine with external mixture, the characteristics of performance and combustion are experimentally analyzed with change of intake/exhaust valve timings under the fixed valve overlap period of CA(non-valve overlap period). These characteristics are also tested for the change of exhaust valve closing timing while intake valve opening timing is fixed to clear the main cause of back-fire occurrence. As the results, the less valve overlap period center is retarded, the more back-fire limit equivalence ratio increases and back-fire does not occurred after TDC. In addition, it was shown that the control of back-fire is dependent on intake valve opening timing than valve overlap period.
Hydrogen, methane, and liquefied petroleum gas (LPG) have the fast flame velocities that could af... more Hydrogen, methane, and liquefied petroleum gas (LPG) have the fast flame velocities that could affect to the combustion process of gasoline-gas fuelled engines. This leads to reduce in time loss (due to finite combustion process) and to gain higher combustion efficiency and brake thermal efficiency. Thus, the primary objectives of this paper are to study the effects of addition of H2, CH4, and LPG on performance of a gasoline fuel injection motorcycle engine. The combustion process characteristics is predicted by Vibe 2-Zone model and the Woschni 1987 model is used to measure heat transfer process in AVL Boost software. The simulation process bases on characterizing of the motorcycle engine specification and simulating with using gasoline to demonstrate durability of simulation model. Then, the motorcycle model is evaluated when it use gasoline-gas fuel with different gas concentrations (from about 5%, 10%, 15%, 20% and 25%). The obtained results are used to compare each other’s eng...
2019 International Conference on System Science and Engineering (ICSSE), 2019
The classification of mango in Vietnam and the world is being carried out mainly by direct labor ... more The classification of mango in Vietnam and the world is being carried out mainly by direct labor of farmers using time-consuming and less efficient observations or some non-specialized machines and results for productivity not high, high cost, sorting out different types of mangoes is relatively costly. World studies of mango classification according to color, size, volume and almost done in the laboratory but not yet applied in practice. The quality assessment of mango fruit has not been resolved. So it is necessary to study image processing techniques; collect and build a database of photos of some types of mangoes in Vietnam; studying mango quality approaches and techniques, examining mango surfaces that are deep, withered, porous, deformed mangoes, ripening on mango fruit; application of image processing technology, computer vision combined with artificial intelligence in the problem of mango classification or poor quality. The goal of the study is to create a system that can classify mangoes in terms of color, volume, size, shape and fruit density. The classification system using image processing incorporates artificial intelligence including the use of CCD cameras, C language programming, computer vision and artificial neural networks. The system uses the captured mango image, processing the split layer to determine the mass, volume and defect on the mango fruit surface. This article is about the development of an automatic mango classification system using image processing technology combining artificial intelligence to control and evaluate mango quality before packaging and exporting to the market.
2021 International Conference on System Science and Engineering (ICSSE), 2021
There are many energy sources converted from PMLG (Permanent Magnet Linear Generator- PMLG) linea... more There are many energy sources converted from PMLG (Permanent Magnet Linear Generator- PMLG) linear generator such as wave energy, free-piston engine. This paper proposes the design and study of a single-phase PMLG with a simple structure. Using motion simulators, the objective is to investigate the PMLG's operation at low moving speeds from 0.25 m/s to 0.5 m/s. To determine the electrostatic parameters, a 3-D of linear generator is built-in Ansoft Maxwell V16 software. Using Matlab software, then, these parameters are used to estimate the output basic parameters such as current, voltage, and power that are quantitatively compared with experimental results. The obtained results show that by changing the displacement speed of the linear rod from 0.25 m/s to 0.5 m/s, the voltage and the current increase to double and 10 times, respectively. These results of voltages are also compared with experimental results at speeds of 0.25m/s and 0.5 m/s with and without a load of RL=3.5˄. As the displacement speed changes, the voltage increases 2 times (20V to 40V) for the case of without a load and increases about 4 times (4V to 15V) with a load. From this study, the obtained results demonstrate the feasibility of a linear generator driven by a small power free-piston internal combustion engine to generate electricity.
Science and Technology Development Journal, 2009
The development of a hydrogen-fueled engine using an external mixture (e.g., using port injection... more The development of a hydrogen-fueled engine using an external mixture (e.g., using port injection) with high efficiency and high power is dependent on the control of backfire. This work has developed a method to control backfire by reducing the valve overlap period. For this goal, a single-cylinder hydrogen-fueled research engine with a mechanical continuous variable valve timing (MCVVT) system was developed. This facility provides a wide range of valve overlap periods that can be continuously and independently varied during firing operation. In experiments, the behavior of backfire occurrence and engine performance are determined as functions of the valve overlap period for fuel-air equivalence ratios between 0.25 and 1.2. The results showed that the research engine with the MCVVT system has similar performance to a conventional engine, and is especially effective in controlling the valve overlap period. The obtained results demonstrate that decreasing the valve overlap period may ...
Energy, 2020
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Energy & Fuels, 2019
Pollutant emission is becoming a serious environmental issue nowadays. Stringent legislations wer... more Pollutant emission is becoming a serious environmental issue nowadays. Stringent legislations were introduced in several countries to limit the permissible levels of pollutant particle emission in major combustion systems such as burners and furnaces that have been widely used in industrial application. In this study, a numerical study of laminar coflow diffusion flame was performed in a model combustor using the commercial software, ANSYS Fluent 19.1. The main focus of this study is to understand the effect of the variation of flow characteristics in the coflow diffusion flame on the prediction of NO x and soot emissions. Comparison study of the pollutant formation was performed with different hydrocarbon gaseous fuels (methane, ethylene, ethane, propane and n-butane) with
International Journal of Engineering and Technology, 2019
Sorting and Classification of mango, there are different colors, weights, sizes, shapes and densi... more Sorting and Classification of mango, there are different colors, weights, sizes, shapes and densities. Currently, classification based on the above features is being carried out mainly by manuals due to farmers' awareness of low accuracy, high costs, health effects and high costs, costly economically inferior. This study was conducted on three main commercial mango species of Vietnam to find out the method of classification of mango with the best quality and accuracy. World studies of mango classification according to color, size, volume and almost done in the laboratory but not yet applied in practice. The quality assessment of mango fruit has not been resolved. Application of image processing technology, computer vision combined with artificial intelligence in the problem of mango classification or poor quality. The goal of the study is to create a system that can classify mangoes in terms of color, volume, size, shape and fruit density. The classification system using image processing incorporates artificial intelligence including the use of CCD cameras, C language programming, computer vision and artificial neural networks. The system uses the captured mango image, processing the split layer to determine the mass, volume and defect on the mango fruit surface. Especially, determine the density of mangoes related to its maturity and sweetness and determine the percentage of mango defects to determine the quality of mangoes for export and domestic or recycled mangoes. This article is about the development of an automatic mango classification system to control and evaluate mango quality before packaging and exporting to the market. It is in the research, design and fabrication of mango classification model and the completion of an automatic mango classification system using machine vision combining artificial intelligence. Index Terms-The classification of mango, sorting of mangoes, image processing technology, artificial intelligence; computer vision, artificial neural networks.
한국자동차공학회 2008년 학술대회 자료집, Nov 1, 2008
To develop a hydrogen fueled engine with external mixture which uses in high reliability, low cos... more To develop a hydrogen fueled engine with external mixture which uses in high reliability, low cost and low pressure, the single cylinder research engine with MCVVT(Mechanical Continuous Variable Valve Timing) system is developed and its basic characteristics analyzed. The MCVVT developed has high reliability and the valve timing change is possible in wide range continuously. Though the mechanical loss due to MCVVT system is increased a little, back-fire suppression research for valve overlap period is no difficulty. It's also confirmed that the hydrogen-fueled engine has lower torque and is possible high lean burn. As fuel-air equivalence ratio is high, as thermal efficiency is remarkable increasing.
International Forum on Strategic Technology 2010, 2010
... 1 A Study on Power Generation System Using Biogas Generated from the Waste of Pig Farm Tran M... more ... 1 A Study on Power Generation System Using Biogas Generated from the Waste of Pig Farm Tran Minh Tien, Pham Xuan Mai, Nguyen Dinh Hung, Huynh Thanh Cong Faculty of Transportation ... Figure 1. HDPE anaerobic digester installed at Binh Duong Province. ...
Journal of Engineering for Gas Turbines and Power, 2008
The development of a hydrogen-fueled engine using external mixture injection (e.g., using port or... more The development of a hydrogen-fueled engine using external mixture injection (e.g., using port or manifold fuel injection) with high efficiency and high power is dependent on the control of backfire. This work has developed a method to control backfire by reducing the valve overlap period while maintaining or improving engine performance. For this goal, a single-cylinder hydrogen-fueled research engine with a mechanical continuous variable valve timing system was developed. This facility provides a wide range of valve overlap periods that can be continuously and independently varied during firing operation. By using this research engine, the behavior of backfire occurrence and engine performance are determined as functions of the valve overlap period for fuel-air equivalence ratios between 0.3 and 1.2. The results showed that the developed hydrogen-fueled research engine with the mechanical continuous variable valve timing system has similar performance to a conventional engine with...
2020 5th International Conference on Green Technology and Sustainable Development (GTSD)
Vehicle contributes greatly to the rapid and strong economic development and other aspects of soc... more Vehicle contributes greatly to the rapid and strong economic development and other aspects of society. Besides, the operation of the transport impact on health and the environment seriously. Therefore, the study of solutions to improve fuel efficiency and environmental protection is one of the most focusing issues. The main objective of this paper is to present the theoretical fundamentals related to the design and development of a two-stroke free-piston engine (FPE) for electrical power generation. In this study, the prototype engine has been conducted with a power of 1.5kW, a bore size of 34mm, and a maximum possible stroke of 28mm using gasoline as fuel. In the future, this engine will be going to take advantage of excess biogas to generate electricity for production activities and daily life. The research has completed the initial intentions such as a theoretical investigation, calculation, determination of the engine model, and starting mechanism. Preliminary results have confirmed the feasibility of proposing the FPE model.
The Korean Hydrogen And New Energy Society, Sep 1, 2007
2019 7th International Conference on Control, Mechatronics and Automation (ICCMA), 2019
Sorting and Classification of mango, there are different colors, weights, sizes, shapes and densi... more Sorting and Classification of mango, there are different colors, weights, sizes, shapes and densities. Currently, classification based on the above features is being carried out mainly by manuals due to farmers’ awareness of low accuracy, high costs, health effects and high costs, costly economically inferior. The internal quality of the mango such as sweetness, hardness, age, brittleness… is very important but is only estimated by external or human-perceived evaluation. Therefore, it is necessary to use artificial neural networks to solve this problem. This study was conducted on three main commercial mango species of Vietnam to find out the method of classification of mango with the best quality and accuracy. World studies of mango classification according to color, size, volume and almost done in the laboratory but not yet applied in practice. The quality assessment of mango fruit has not been resolved. Application of image processing technology, computer vision combined with artificial intelligence in the problem of mango classification or poor quality. The goal of the study is to create a system that can classify mangoes in terms of color, volume, size, shape and fruit density. The classification system using image processing incorporates artificial intelligence including the use of CCD cameras, C language programming, computer vision and artificial neural networks. The system uses the captured mango image, processing the split layer to determine the mass, volume and defect on the mango fruit surface. Especially, determine the density of mangoes related to its maturity and sweetness and determine the percentage of mango defects to determine the quality of mangoes for export and domestic or recycled mangoes.
2017 International Conference on System Science and Engineering (ICSSE), 2017
This paper presents the development of velocity - time measuring system for motorcycles and the p... more This paper presents the development of velocity - time measuring system for motorcycles and the potential of proposing a driving cycle for motorcycles in Ho Chi Minh City. Motorcycles are the major mean of transport, but they are also the main source of air pollution in the biggest cities in Vietnam. Nowadays, the high levels of fuel consumption and air pollution are the most important problems that characterized the urban areas of both developed and developing countries. In this work, a velocity time measuring system is developed for tracking the change of velocity as a function of time. This system is studied using (1) Velocity sensor: magnetic type converted analog signal to digital/pulse signal sending to Arduino circuit; (2) Accelerator sensor: measured accelerator for three axis (x, y, z) and sending to Arduino via standard of I2C; (3) Arduino: receiving and processing the measured signal and communicating smart phone via Bluetooth; (4) Smart phone/receiver using android operating system: receiving the signal via Bluetooth and estimating the concerned parameters and monitoring the measured/estimated results. The preliminary results are useful to evaluate for better understanding the current status and further development for driving cycle for motorcycle.
To analyze the influence of valve overlap period on a backfire occurrence, the single cylinder re... more To analyze the influence of valve overlap period on a backfire occurrence, the single cylinder research engine with MCVVT(Mechanical Continuous Variable Valve Timing) system is developed and backfire limit equivalence ratio defined as fuel-air ratio equivalence ratio at which backfire occurs is examined according to various valve overlap period. The MCVVT is the system to control valve overlap period by mechanical device. It is estimated that the lower valve overlap period has the higher backfire limit equivalence ratio though the same energy is supplied. When the valve overlap period is changed from 30° CA to 0° CA, backfire limit equivalence ratio is increased 74%, approximately. It means that valve overlap period is concern in backfire occurrence, and may be one of the methods for controlling back fire occurred in a H₂ engine.
In order to develop an external mixture type hydrogen engine with high performance, the character... more In order to develop an external mixture type hydrogen engine with high performance, the characteristics of performance and combustion are investigated for various valve overlap period by using Hz engine installed a mechanical continuous variable valve timing system. In experiments, valve overlap periods are analogically varied for 0° to 400°CA by 10°CA with the same amount of supplied energy as valve overlap period of O°CA, fuel-air equivalence ratio of 0.3 to backfire limit equivalence ratio. The obtained results show that by using a similarly low supplied energy, the tendencies of the basic qualitative performance and combustion characteristics are similar to conventional engines using petroleum fuel, but quantitative results give a little difference. The backfire limit equivalence ratio (defined as the upper limit of fuel-air equivalence ratio just before backfire occurs) was also improved significantly with decrease of valve overlap period and/or for operating conditions with th...
In order to verify the feasibility of expansion of back-fire limit equivalence ratio in the hydro... more In order to verify the feasibility of expansion of back-fire limit equivalence ratio in the hydrogen-fueled engine with external mixture, the characteristics of performance and combustion are experimentally analyzed with change of intake/exhaust valve timings under the fixed valve overlap period of CA(non-valve overlap period). These characteristics are also tested for the change of exhaust valve closing timing while intake valve opening timing is fixed to clear the main cause of back-fire occurrence. As the results, the less valve overlap period center is retarded, the more back-fire limit equivalence ratio increases and back-fire does not occurred after TDC. In addition, it was shown that the control of back-fire is dependent on intake valve opening timing than valve overlap period.
Hydrogen, methane, and liquefied petroleum gas (LPG) have the fast flame velocities that could af... more Hydrogen, methane, and liquefied petroleum gas (LPG) have the fast flame velocities that could affect to the combustion process of gasoline-gas fuelled engines. This leads to reduce in time loss (due to finite combustion process) and to gain higher combustion efficiency and brake thermal efficiency. Thus, the primary objectives of this paper are to study the effects of addition of H2, CH4, and LPG on performance of a gasoline fuel injection motorcycle engine. The combustion process characteristics is predicted by Vibe 2-Zone model and the Woschni 1987 model is used to measure heat transfer process in AVL Boost software. The simulation process bases on characterizing of the motorcycle engine specification and simulating with using gasoline to demonstrate durability of simulation model. Then, the motorcycle model is evaluated when it use gasoline-gas fuel with different gas concentrations (from about 5%, 10%, 15%, 20% and 25%). The obtained results are used to compare each other’s eng...
2019 International Conference on System Science and Engineering (ICSSE), 2019
The classification of mango in Vietnam and the world is being carried out mainly by direct labor ... more The classification of mango in Vietnam and the world is being carried out mainly by direct labor of farmers using time-consuming and less efficient observations or some non-specialized machines and results for productivity not high, high cost, sorting out different types of mangoes is relatively costly. World studies of mango classification according to color, size, volume and almost done in the laboratory but not yet applied in practice. The quality assessment of mango fruit has not been resolved. So it is necessary to study image processing techniques; collect and build a database of photos of some types of mangoes in Vietnam; studying mango quality approaches and techniques, examining mango surfaces that are deep, withered, porous, deformed mangoes, ripening on mango fruit; application of image processing technology, computer vision combined with artificial intelligence in the problem of mango classification or poor quality. The goal of the study is to create a system that can classify mangoes in terms of color, volume, size, shape and fruit density. The classification system using image processing incorporates artificial intelligence including the use of CCD cameras, C language programming, computer vision and artificial neural networks. The system uses the captured mango image, processing the split layer to determine the mass, volume and defect on the mango fruit surface. This article is about the development of an automatic mango classification system using image processing technology combining artificial intelligence to control and evaluate mango quality before packaging and exporting to the market.
2021 International Conference on System Science and Engineering (ICSSE), 2021
There are many energy sources converted from PMLG (Permanent Magnet Linear Generator- PMLG) linea... more There are many energy sources converted from PMLG (Permanent Magnet Linear Generator- PMLG) linear generator such as wave energy, free-piston engine. This paper proposes the design and study of a single-phase PMLG with a simple structure. Using motion simulators, the objective is to investigate the PMLG's operation at low moving speeds from 0.25 m/s to 0.5 m/s. To determine the electrostatic parameters, a 3-D of linear generator is built-in Ansoft Maxwell V16 software. Using Matlab software, then, these parameters are used to estimate the output basic parameters such as current, voltage, and power that are quantitatively compared with experimental results. The obtained results show that by changing the displacement speed of the linear rod from 0.25 m/s to 0.5 m/s, the voltage and the current increase to double and 10 times, respectively. These results of voltages are also compared with experimental results at speeds of 0.25m/s and 0.5 m/s with and without a load of RL=3.5˄. As the displacement speed changes, the voltage increases 2 times (20V to 40V) for the case of without a load and increases about 4 times (4V to 15V) with a load. From this study, the obtained results demonstrate the feasibility of a linear generator driven by a small power free-piston internal combustion engine to generate electricity.
Science and Technology Development Journal, 2009
The development of a hydrogen-fueled engine using an external mixture (e.g., using port injection... more The development of a hydrogen-fueled engine using an external mixture (e.g., using port injection) with high efficiency and high power is dependent on the control of backfire. This work has developed a method to control backfire by reducing the valve overlap period. For this goal, a single-cylinder hydrogen-fueled research engine with a mechanical continuous variable valve timing (MCVVT) system was developed. This facility provides a wide range of valve overlap periods that can be continuously and independently varied during firing operation. In experiments, the behavior of backfire occurrence and engine performance are determined as functions of the valve overlap period for fuel-air equivalence ratios between 0.25 and 1.2. The results showed that the research engine with the MCVVT system has similar performance to a conventional engine, and is especially effective in controlling the valve overlap period. The obtained results demonstrate that decreasing the valve overlap period may ...
Energy, 2020
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Energy & Fuels, 2019
Pollutant emission is becoming a serious environmental issue nowadays. Stringent legislations wer... more Pollutant emission is becoming a serious environmental issue nowadays. Stringent legislations were introduced in several countries to limit the permissible levels of pollutant particle emission in major combustion systems such as burners and furnaces that have been widely used in industrial application. In this study, a numerical study of laminar coflow diffusion flame was performed in a model combustor using the commercial software, ANSYS Fluent 19.1. The main focus of this study is to understand the effect of the variation of flow characteristics in the coflow diffusion flame on the prediction of NO x and soot emissions. Comparison study of the pollutant formation was performed with different hydrocarbon gaseous fuels (methane, ethylene, ethane, propane and n-butane) with
International Journal of Engineering and Technology, 2019
Sorting and Classification of mango, there are different colors, weights, sizes, shapes and densi... more Sorting and Classification of mango, there are different colors, weights, sizes, shapes and densities. Currently, classification based on the above features is being carried out mainly by manuals due to farmers' awareness of low accuracy, high costs, health effects and high costs, costly economically inferior. This study was conducted on three main commercial mango species of Vietnam to find out the method of classification of mango with the best quality and accuracy. World studies of mango classification according to color, size, volume and almost done in the laboratory but not yet applied in practice. The quality assessment of mango fruit has not been resolved. Application of image processing technology, computer vision combined with artificial intelligence in the problem of mango classification or poor quality. The goal of the study is to create a system that can classify mangoes in terms of color, volume, size, shape and fruit density. The classification system using image processing incorporates artificial intelligence including the use of CCD cameras, C language programming, computer vision and artificial neural networks. The system uses the captured mango image, processing the split layer to determine the mass, volume and defect on the mango fruit surface. Especially, determine the density of mangoes related to its maturity and sweetness and determine the percentage of mango defects to determine the quality of mangoes for export and domestic or recycled mangoes. This article is about the development of an automatic mango classification system to control and evaluate mango quality before packaging and exporting to the market. It is in the research, design and fabrication of mango classification model and the completion of an automatic mango classification system using machine vision combining artificial intelligence. Index Terms-The classification of mango, sorting of mangoes, image processing technology, artificial intelligence; computer vision, artificial neural networks.
한국자동차공학회 2008년 학술대회 자료집, Nov 1, 2008
To develop a hydrogen fueled engine with external mixture which uses in high reliability, low cos... more To develop a hydrogen fueled engine with external mixture which uses in high reliability, low cost and low pressure, the single cylinder research engine with MCVVT(Mechanical Continuous Variable Valve Timing) system is developed and its basic characteristics analyzed. The MCVVT developed has high reliability and the valve timing change is possible in wide range continuously. Though the mechanical loss due to MCVVT system is increased a little, back-fire suppression research for valve overlap period is no difficulty. It's also confirmed that the hydrogen-fueled engine has lower torque and is possible high lean burn. As fuel-air equivalence ratio is high, as thermal efficiency is remarkable increasing.
International Forum on Strategic Technology 2010, 2010
... 1 A Study on Power Generation System Using Biogas Generated from the Waste of Pig Farm Tran M... more ... 1 A Study on Power Generation System Using Biogas Generated from the Waste of Pig Farm Tran Minh Tien, Pham Xuan Mai, Nguyen Dinh Hung, Huynh Thanh Cong Faculty of Transportation ... Figure 1. HDPE anaerobic digester installed at Binh Duong Province. ...
Journal of Engineering for Gas Turbines and Power, 2008
The development of a hydrogen-fueled engine using external mixture injection (e.g., using port or... more The development of a hydrogen-fueled engine using external mixture injection (e.g., using port or manifold fuel injection) with high efficiency and high power is dependent on the control of backfire. This work has developed a method to control backfire by reducing the valve overlap period while maintaining or improving engine performance. For this goal, a single-cylinder hydrogen-fueled research engine with a mechanical continuous variable valve timing system was developed. This facility provides a wide range of valve overlap periods that can be continuously and independently varied during firing operation. By using this research engine, the behavior of backfire occurrence and engine performance are determined as functions of the valve overlap period for fuel-air equivalence ratios between 0.3 and 1.2. The results showed that the developed hydrogen-fueled research engine with the mechanical continuous variable valve timing system has similar performance to a conventional engine with...