Seyed Ehsan Hosseini | Arkansas Tech University (original) (raw)
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Papers by Seyed Ehsan Hosseini
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2015
Low calorific value of biogas is one of the most important barriers of biogas development in indu... more Low calorific value of biogas is one of the most important barriers of biogas development in industrial scale. Since biogas upgrading is complicated and not economic, various characteristics of pure biogas combustion have been experimented in recent years. In this paper, the characteristics of biogas flame structure and emissions in nonpremixed vortex combustion are studied experimentally and numerically. A lab-scale asymmetric chamber is employed as an industrial vortex combustor model and characteristics of biogas vortex combustion such as temperature distribution inside the chamber, the flame stability and the combustion emissions are investigated with respect to the various mole fraction of CO2 in the biogas content. The flame structure and emissions were recorded by changing the percentage of CO2 mole fraction in the biogas from 0 to 40% by volume. The results indicate that the stability of nonpremixed biogas combustion decreases when the rate of CO2 mole fraction increases in ...
Energy Conversion and Management, 2015
Jurnal Teknologi, 2014
Due to industrial development and population growth, global demand for energy has increased enorm... more Due to industrial development and population growth, global demand for energy has increased enormously. The increased consumption of primary sources of energy such as coal, oil and natural gas has exerted a strong influence on the atmospheric environment. Among all of the alternative fuels, hydrogen offers the greatest potential benefits to energy supply and the environment. In the current study computational investigations of a turbulent asymmetric vortex flame is presented. This study has predicted lean and stoichiometry flammability limits for hydrogen. The three dimensional flow fields have been described using a computational methodology that implements the k−ε RNG turbulence model. The computational model is validated for reaction flow. The special hydrogen-air mixing concept eliminates the risk of flame flashback and enables operation with very low NOx emissions.
Jurnal Teknologi, 2014
Energy crisis and environmental issues related to fossil fuel consumption have emerged as a conce... more Energy crisis and environmental issues related to fossil fuel consumption have emerged as a concern for scientific societies. Biodiesel has been introduced as an acceptable source of energy to substitute fossil fuels. In general, vegetable oils and their derivatives known as biodiesel have been applied successfully in energy generation purposes. Technically, biodiesel provides some advantages in terms of pollutant formation and power generation in comparison with conventional diesel fuel. In addition to being an indigenous and renewable supply, biodiesel reduces toxic emissions, and majority of engine performance and fuel consumption are comparable with the use of conventional fuels. In this paper various aspects of inedible oil utilization in engine and energy generation is studied. Economy, combustion characteristics and pollution formation of some inedible oil namely Jatropha, Karanja, Jojoba, Cottonseed, Mahua Oil and Rice bran Oil are investigated.
Renewable and Sustainable Energy Reviews, 2014
Renewable and Sustainable Energy Reviews, 2012
Energy Conversion and Management, 2013
Journal of the Air & Waste Management Association, 2013
International Journal of Energy Research, 2019
Journal of Thermal Analysis and Calorimetry, 2019
Energies, 2018
In small-scale combustors, the ratio of area to the combustor volume increases and hence heat los... more In small-scale combustors, the ratio of area to the combustor volume increases and hence heat loss from the combustor’s wall is significantly enhanced and flame quenching occurs. To solve this problem, non-premixed vortex flow is employed to stabilize flames in a meso-scale combustion chamber to generate small-scale power or thrust for propulsion systems. In this experimental investigation, the effects of thermal recuperation on the characteristics of asymmetric non-premixed vortex combustion are studied. The exhaust gases temperature, emissions and the combustor wall temperature are measured to evaluate thermal and emitter efficiencies. The results illustrate that in both combustors (with/without thermal recuperator), by increasing the combustion air mass flowrate, the wall temperature increases while the wall temperature of combustor with thermal recuperator is higher. The emitter efficiency calculated based on the combustor wall temperature is significantly increased by using the...
Energy Conversion and Management, 2016
Energy Conversion and Management, 2015
Energy Conversion and Management, 2014
Applied Mechanics and Materials, 2013
In recent years global fuel consumption has increased in the world due to modernization and progr... more In recent years global fuel consumption has increased in the world due to modernization and progress in the standard of living. The conspicuous rate of carbon dioxide and nitrogen oxide released to the environment and fuel resources are depleted day by day due to inconsiderate fuel consumption. Requirement for efficient use of any kinds of fuel has become the other concern due to the oil crisis and limitation of fuel resources. In combustion process, the abatement of pollutants often associates with efficiency loss. In the other word, high efficiency and low pollutant which are the main requirements of combustion are not fulfilled by the existing combustion. Today, flameless combustion has received more attention because of its low NOx emission and significant energy saving. Generally, compatibility between high performance and low NOx emission has been observed by preheated air application and changing the combustion characteristics from traditional flame to flameless mode. This pa...
Applied Thermal Engineering, 2017
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2015
Low calorific value of biogas is one of the most important barriers of biogas development in indu... more Low calorific value of biogas is one of the most important barriers of biogas development in industrial scale. Since biogas upgrading is complicated and not economic, various characteristics of pure biogas combustion have been experimented in recent years. In this paper, the characteristics of biogas flame structure and emissions in nonpremixed vortex combustion are studied experimentally and numerically. A lab-scale asymmetric chamber is employed as an industrial vortex combustor model and characteristics of biogas vortex combustion such as temperature distribution inside the chamber, the flame stability and the combustion emissions are investigated with respect to the various mole fraction of CO2 in the biogas content. The flame structure and emissions were recorded by changing the percentage of CO2 mole fraction in the biogas from 0 to 40% by volume. The results indicate that the stability of nonpremixed biogas combustion decreases when the rate of CO2 mole fraction increases in ...
Energy Conversion and Management, 2015
Jurnal Teknologi, 2014
Due to industrial development and population growth, global demand for energy has increased enorm... more Due to industrial development and population growth, global demand for energy has increased enormously. The increased consumption of primary sources of energy such as coal, oil and natural gas has exerted a strong influence on the atmospheric environment. Among all of the alternative fuels, hydrogen offers the greatest potential benefits to energy supply and the environment. In the current study computational investigations of a turbulent asymmetric vortex flame is presented. This study has predicted lean and stoichiometry flammability limits for hydrogen. The three dimensional flow fields have been described using a computational methodology that implements the k−ε RNG turbulence model. The computational model is validated for reaction flow. The special hydrogen-air mixing concept eliminates the risk of flame flashback and enables operation with very low NOx emissions.
Jurnal Teknologi, 2014
Energy crisis and environmental issues related to fossil fuel consumption have emerged as a conce... more Energy crisis and environmental issues related to fossil fuel consumption have emerged as a concern for scientific societies. Biodiesel has been introduced as an acceptable source of energy to substitute fossil fuels. In general, vegetable oils and their derivatives known as biodiesel have been applied successfully in energy generation purposes. Technically, biodiesel provides some advantages in terms of pollutant formation and power generation in comparison with conventional diesel fuel. In addition to being an indigenous and renewable supply, biodiesel reduces toxic emissions, and majority of engine performance and fuel consumption are comparable with the use of conventional fuels. In this paper various aspects of inedible oil utilization in engine and energy generation is studied. Economy, combustion characteristics and pollution formation of some inedible oil namely Jatropha, Karanja, Jojoba, Cottonseed, Mahua Oil and Rice bran Oil are investigated.
Renewable and Sustainable Energy Reviews, 2014
Renewable and Sustainable Energy Reviews, 2012
Energy Conversion and Management, 2013
Journal of the Air & Waste Management Association, 2013
International Journal of Energy Research, 2019
Journal of Thermal Analysis and Calorimetry, 2019
Energies, 2018
In small-scale combustors, the ratio of area to the combustor volume increases and hence heat los... more In small-scale combustors, the ratio of area to the combustor volume increases and hence heat loss from the combustor’s wall is significantly enhanced and flame quenching occurs. To solve this problem, non-premixed vortex flow is employed to stabilize flames in a meso-scale combustion chamber to generate small-scale power or thrust for propulsion systems. In this experimental investigation, the effects of thermal recuperation on the characteristics of asymmetric non-premixed vortex combustion are studied. The exhaust gases temperature, emissions and the combustor wall temperature are measured to evaluate thermal and emitter efficiencies. The results illustrate that in both combustors (with/without thermal recuperator), by increasing the combustion air mass flowrate, the wall temperature increases while the wall temperature of combustor with thermal recuperator is higher. The emitter efficiency calculated based on the combustor wall temperature is significantly increased by using the...
Energy Conversion and Management, 2016
Energy Conversion and Management, 2015
Energy Conversion and Management, 2014
Applied Mechanics and Materials, 2013
In recent years global fuel consumption has increased in the world due to modernization and progr... more In recent years global fuel consumption has increased in the world due to modernization and progress in the standard of living. The conspicuous rate of carbon dioxide and nitrogen oxide released to the environment and fuel resources are depleted day by day due to inconsiderate fuel consumption. Requirement for efficient use of any kinds of fuel has become the other concern due to the oil crisis and limitation of fuel resources. In combustion process, the abatement of pollutants often associates with efficiency loss. In the other word, high efficiency and low pollutant which are the main requirements of combustion are not fulfilled by the existing combustion. Today, flameless combustion has received more attention because of its low NOx emission and significant energy saving. Generally, compatibility between high performance and low NOx emission has been observed by preheated air application and changing the combustion characteristics from traditional flame to flameless mode. This pa...
Applied Thermal Engineering, 2017
Future Publishing LLC, 2024
“Hydrogen Diplomacy” provides a comprehensive examination of the global transition towards hydrog... more “Hydrogen Diplomacy” provides a comprehensive examination of the global transition towards hydrogen as a pivotal energy carrier, emphasizing its urgency amidst environmental crises stemming from fossil fuel usage. The book delves into the potential of hydrogen as a clean and sustainable alternative, elucidating its benefits while navigating the challenges impeding its widespread adoption. From exploring various methods of hydrogen production, including fossil fuel-based and renewables-driven approaches, to scrutinizing the intricate facets of the hydrogen economy, transportation systems, and advancements in storage and delivery mechanisms, each chapter comprehensively elucidates critical aspects of this paradigm shift. Moreover, it examines regional strategies and international collaborations, showcasing the United States' endeavors to leverage hydrogen for decarbonization, the European Union's ambitious hydrogen strategy, the Middle East and Asia-Pacific's vision for a cleaner future. Furthermore, the book explores the roles of other key players, such as Russia, the United Kingdom, Canada, Africa, and South America, in shaping the global landscape of hydrogen technology. With its analysis and strategic insights, "Hydrogen Diplomacy" serves as an indispensable guide for researchers and engineers (Energy, Environmental, Mechanical, Electrical, Chemical, Material), policymakers, and industry stakeholders navigating the intricate realms of energy transition and diplomacy in the pursuit of a sustainable future.