Journal of Energy Engineering: Recent submissions
Now showing items 421-440 of 1539
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Simulation of a Supercritical CO2 Recompression Cycle with Zero Emissions
(ASCE, 12/1/2020 )The NET power cycle (NPC) offers an alternative way to inherently capture combustion derived CO2 with low efficiency penalty. This manuscript improves the NPC by recompressing a portion of the recycled CO2 stream to the ... -
Thermodynamic Analysis and Optimization of a Solar-Powered Organic Rankine Cycle with Compound Parabolic Collectors
(ASCE, 12/1/2020 )The solar-powered Organic Rankine Cycle (ORC) could solve the energy crisis and achieve low emissions because it presents a high energy conversion efficiency for a low-temperature heat source, with little impact on the ... -
Regenerative Fuel Cell-Battery-Supercapacitor Hybrid Power System Modeling and Improved Rule-Based Energy Management for Vehicle Application
(ASCE, 12/1/2020 )This paper focuses on a proton-exchange membrane (PEM) fuel cell/electrolyzer-based regenerative hybrid power system modeling and energy management for automotive application. In the regenerative hybrid power system, the ... -
Effects of Local Thermal Accumulation Conditions on the Thermal Characteristics of Lithium-Ion Batteries under High-Rate Charging
(ASCE, 12/1/2020 )Electric vehicles use lithium-ion batteries as their power source; however, many researchers have expressed concern about the safety of these batteries. In this study, a new method was used to establish an accurate model ... -
Multitime Scale Analysis of Surface Temperature Distribution of Lithium-Ion Batteries in Quantity–Quality Change under Local High-Temperature Heat Source
(ASCE, 12/1/2020 )Lithium-ion batteries are currently the most suitable power source for new energy vehicles. Thermal runaway is the biggest potential safety hazard. To achieve safer battery and battery design, it is necessary to fully ... -
Numerical Study of the Cold-Start Process of PEM Fuel Cells with Different Current Density Operating Modes
(ASCE, 12/1/2020 )A 1D transient model was proposed to investigate the effects of the current density operating modes on the cold-start process of proton exchange membrane (PEM) fuel cells. The temperature evolution of the cell is solved ... -
Impact Analysis of Bioclimatic Strategies on the Thermoenergetic Performance of a Pilot Plant in Southern Brazil
(ASCE, 10/1/2020 )Natural resources in the current scenario of energy production and consumption demands appropriate management. Due to increasing urbanization worldwide, energy consumption optimization has become fundamental, including in ... -
Comprehensive Characterization of the Behavior of a Diesel Oxidation Catalyst Used on a Dual-Fuel Engine
(ASCE, 12/1/2020 )Aim of this work is the evaluation of thermal behavior and performance of a conventional diesel oxidation catalyst (DOC) installed on an engine operating in dual-fuel diesel-methane conditions following a well-defined ... -
Effect of Inlet-Mixture Stratification and Preheating on a C3H8 Premixer and Bluff-Body Combustor
(ASCE, 12/1/2020 )This work presents the computational investigation of the nonreacting flow field and of the fuel–air mixing characteristics in a stratified, premixer/bluff-body combustor configuration under the effect of elevated inlet ... -
Performance of Parallel, Interdigitated, and Serpentine Flow Field PEM Fuel Cells with Straight or Wavelike Channels
(ASCE, 10/1/2020 )This work used a three-dimensional, two-phase, and nonisothermal model to compare performances of proton exchange membrane (PEM) fuel cells with a parallel, interdigitated, or serpentine flow field when wavelike gas channels ... -
Numerical Modeling of a Darrieus Horizontal Axis Shallow-Water Turbine
(ASCE, 10/1/2020 )For decades, Darrieus turbines have shown their advantage over other turbines for providing hydropower. Most studies tend to be conducted with the turbine in its vertical axis configuration, while few have examined the ... -
Flow-Field Geometry Effect on H2–Iron Redox Flow Battery
(ASCE, 12/1/2020 )The redox flow battery is getting intense attention these days as one of the most promising systems to store energy generated from weather-dependent renewable energy sources such as solar and wind energies. In this research, ... -
Uncoupling Characteristics of Temperature and Relative Humidity Distribution in a Commercial-Size Polymer Electrolyte Membrane Fuel Cell
(ASCE, 10/1/2020 )The microenvironment of the electrodes in a polymer electrolyte membrane fuel cell (PEMFC) is critical to its performance and is significantly affected by the distribution of water and heat along the cell. In this work, ... -
Comparative Assessment of the Impact of Water Addition either to the Intake Air or in Diesel Emulsion on the Performance and Emissions of a HDDI Diesel Engine
(ASCE, 10/1/2020 )A theoretical investigation is performed to comparatively evaluate the impact of water addition to the intake air (humidification) or in water-diesel fuel emulsion on the performance and emissions in a turbocharged (T/C), ... -
Numerical Study on the Stress Concentration Phenomenon in the Membranes of PEMFCs in an Assembled State
(ASCE, 10/1/2020 )Mechanical damage to the membrane of the electrode assembly (MEA) in a proton electrolyte membrane fuel cell (PEMFC) is one of the main factors influencing its durability. In this study, a two-dimensional finite-element ... -
Product Compositions from Sequential Biomass Pyrolysis and Gasification of Its Char Residue
(ASCE, 10/1/2020 )Sequential pyrolysis of biomass and gasification of the resultant char generate syngas. The Aspen Plus software was used to simulate a two-stage high-temperature cyclone pyrolysis and gasification of corn straw and rice ... -
Methodology to Estimate Road Grade Effects on Consumption and Emissions from a Light Commercial Vehicle Running on the WLTC Cycle
(ASCE, 10/1/2020 )A novel methodology is suggested in this study, with the aim of assessing the impact of the road grade on a vehicle’s performance and emissions. This methodology consists of creating multiple sinusoidal elevation profiles ... -
Energy, Exergy, and Parametric Analysis of Simple and Recuperative Organic Rankine Cycles Using a Gas Turbine–Based Combined Cycle
(ASCE, 10/1/2020 )In this study, simple and recuperative organic Rankine cycles (ORCs) were designed as the bottoming cycle to a simple gas turbine. After the design, the performance of the ORC engines was analyzed for varying turbine inlet ... -
Design and Optimization of Ellipsoidal Windows for Concentrated Solar Irradiation
(ASCE, 10/1/2020 )This work presents a numerical study on transmission performance of ellipsoidal windows used in receivers under concentrated solar irradiation. The Monte Carlo ray tracing method is used to analyze the transmission of ... -
Fuzzy Control Based on IQPSO in Proton-Exchange Membrane Fuel-Cell Temperature System
(ASCE, 10/1/2020 )The proton-exchange membrane fuel cell (PEMFC) is the most promising fuel cell technology because of the high power density and fast start-up. However, PEMFCs have not yet been commercialized on a large scale due to many ...