Article
Thermodynamics
Mohamed Nadir Boukoberine, Muhammad Fahad Zia, Mohamed Benbouzid, Zhibin Zhou, Teresa Donateo
Summary: This paper investigates hybrid electric fuel cell-powered drones energy management, proposing power management strategies that enable power sources operating in their nominal area, extending their lifetimes, reducing hydrogen consumption, and increasing endurance as well as economic benefit.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Zhuyu Zhou, Zijie Xu, Leo N. Y. Cao, Hengrui Sheng, Chengyu Li, Yurui Shang, Wei Tang, Zhong Lin Wang
Summary: The utilization of unmanned aerial vehicles (UAVs) is increasing in various industries, making flight safety for these UAVs a top priority. However, UAVs have shortcomings in flight attitude perception and position sensing compared to manned aircraft. To address this challenge, new position sensing technologies are needed. In this study, a self-powered displacement sensor utilizing frictional charge separation signals is developed to monitor the position status of flight actuators in UAVs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Energy & Fuels
Mohamed Nadir Boukoberine, Teresa Donateo, Mohamed Benbouzid
Summary: This paper proposes an optimized energy management strategy for hybrid electric fuel cell/battery-based drones, aiming to improve fuel economy and extend the lifespan of energy sources. By combining rule-based strategy and genetic algorithm, an online energy management system is developed for drone applications. Simulation results demonstrate that the proposed approach allows power sources to operate within their rated area, prolonging their service life, and leading to a reduction in fuel consumption. These findings suggest that the proposed strategy can enhance the autonomy and achieve cost benefits in operating fuel cell stack during its lifecycle.
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2022)
Article
Multidisciplinary Sciences
Shashank Sripad, Venkatasubramanian Viswanathan
Summary: Improvements in rechargeable batteries have enabled the design of electric urban air mobility (UAM) aircraft with longer range and higher passenger capacity, resulting in lower energy consumption. The technological readiness of these new aircraft designs is high, although uncertainties remain in terms of rechargeability and lifetime performance.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Engineering, Aerospace
Junquan Fu, Zhiwei Shi, Zheng Gong, Mark H. Lowenberg, Dawei Wu, Lijun Pan
Summary: The study indicates the feasibility and reliability of virtual flight testing in predicting departure characteristics of a Blended-Wing-Body, showing a good correspondence with actual flight test results.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Biology
Gottfried Sachs
Summary: A new flight mode in birds that decreases energy costs by utilizing powered gliding and climbing phases is described. This flight mode enables a decrease in energy costs and low fuel consumption. Birds perform continual altitude changes in long-distance flights and these altitude changes consist of powered gliding and climbing flight with repeated cycles.
JOURNAL OF THEORETICAL BIOLOGY
(2022)
Article
Engineering, Aerospace
Eugene A. Morelli
Summary: Flight test maneuvers and dynamic modeling techniques were used to determine aircraft moments of inertia, with aerodynamic moment dependencies modeled by linear expansions. Aerodynamic and inertia parameters were estimated simultaneously using equation-error modeling, with errors less than 6% in simulated F-16 flight test data. Results from the subscale aircraft flight test were within 6% of ground-test values.
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
(2022)
Article
Engineering, Aerospace
Xiaohua Lu, Xinchao Liu, Yingchun Zhang, Yulong Li, Hongfu Zuo
Summary: This study conducted collision tests between a full-size commercial aircraft nose and a typical UAV, showing that UAVs pose potential hazards to manned aircraft safety. The kinetic energy and hardness of UAV components play a critical role in evaluating nose damage, with higher kinetic energy leading to more serious damage. It suggests the need for future research to improve airworthiness regulations and design guidelines specifically for UAV collision mitigation.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Transportation
Chenyu Huang, Xiaoyue Cheng
Summary: This paper presents a novel strategy to estimate aircraft fuel consumption by modeling flight data from onboard flight data recorder and automatic dependent surveillance-broadcast. The Classification and Regression Tree (CART) model performs better in handling errors and missing values, and the ADS-B data can be used as a less-expensive and more convenient strategy for fuel consumption estimation compared to the FDR data.
JOURNAL OF AIR TRANSPORT MANAGEMENT
(2022)
Article
Computer Science, Information Systems
Wenjun Ni, Di Wu, Xiaoping Ma
Summary: This study introduces a new energy-optimized flight strategy using a deep reinforcement learning framework to extend the flight time of high-altitude solar-powered UAVs while achieving autonomous flight navigation. Simulation results and a sustained flight test demonstrate that the controller based on the reinforcement learning framework has potential for solving the solar-powered UAV trajectory planning problem.
Article
Thermodynamics
Shemin Sagaria, Rui Costa Neto, Patricia Baptista
Summary: This study assessed the feasibility of various power source configurations for vehicles, finding that electric vehicles perform the best in terms of energy consumption. Combining different power sources can significantly affect vehicle range and energy efficiency, with ultra-capacitors suitable for short frequent trips and fuel cells recommended for long-range coaches and trucks.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Physical
Minnan Ye, Phil Sharp, Nigel Brandon, Anthony Kucernak
Summary: This study designs and analyzes electric propulsion systems for marine transport, aiming to reduce emissions. The systems are powered by a hydrogen polymer electrolyte membrane fuel cell system for a water taxi and container ship. Comparisons are made with current fuel-oil engine systems in terms of various factors. It is found that the electric propulsion systems offer advantages in terms of energy efficiency, fuel consumption, mass and volume, environmental impacts, and cost.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Mechanical
Guilherme N. Barufaldi, Mauricio A. Morales, Roberto Gil A. da Silva
Summary: With increasing pressure to lower pollutant emissions, the aerospace industry has turned its attention to the design of more efficient aircraft. Electric airplanes are seen as one of the most promising solutions to this problem, and significant investments are being made to develop this type of aircraft. This study focuses on the fuel and oxidizer consumption during the cruise flight of all-electric aircraft powered by fuel cells and provides parametric models and analytical solutions.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Christian Hartmann, Jonas Kristiansen Noland, Robert Nilssen, Runar Mellerud
Summary: This article presents a comprehensive model framework for studying a disruptive cryoelectric propulsion system for a hydrogen-powered regional aircraft. The main focus is on using liquid hydrogen for cooling to enable compact designs, and determining the optimal working point of the fuel cell for minimizing the system's mass.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Engineering, Aerospace
C. A. Hall, S. R. Burnell, A. P. Deshpande
Summary: There are significant variations in aircraft fuel consumption during the descent phase, with overall engine efficiency one-third of cruise efficiency. Airframe aerodynamic performance deteriorates during descent, with an average lift-to-drag ratio 87% of the cruise value. To minimize fuel burn, flights should cruise as far as possible before starting descent and follow a trajectory with the shortest air distance, potentially saving up to 0.5% of total aircraft mass in fuel.
AERONAUTICAL JOURNAL
(2021)
Article
Chemistry, Analytical
T. Falaguerra, P. Munoz, G. Correa
Summary: The study developed a 3D multiphysics model of a PEMFC half-cell focused on the cathode side, and proposed statistical analysis tools to evaluate current density distribution. The optimal design parameters combination was selected to improve power generation performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Nadia S. Luna, Gabriel Correa-Perelmuter, Gabriela I. Lacconi, Liliana A. Diaz, Esteban A. Franceschini
Summary: The study demonstrates in operando evidence of activation of a conventional alkaline electrolyzer using nickel electrodes modified by spontaneous deposition of ruthenium. Surface modifications and electrochemical techniques were used to reduce activation overvoltage and achieve a considerable increase in electrolysis efficiency.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2021)
Article
Chemistry, Physical
G. Correa, P. Marocco, P. Munoz, T. Falaguerra, D. Ferrero, M. Santarelli
Summary: This paper presents a lumped dynamic model for a high pressure PEM water electrolyzer, focusing on the cathode side and highlighting the importance of the cathodic activation overpotential. The model is calibrated using experimental data from a 5.6 kW PEM water electrolyzer stack, showing a good fit with the experimental data at different temperatures and pressures. The study finds that temperature mainly affects the ohmic overpotential, while increasing cathode pressure significantly increases the cathodic activation overpotential, which is crucial for electrolyzer performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Pedro Munoz, Esteban A. Franceschini, David Levitan, C. Ramiro Rodriguez, Teresita Humana, Gabriel Correa Perelmuter
Summary: Within the energy transition, this paper compares different bus technologies and energy mixes for urban transport vehicles based on cost, energy consumption, and greenhouse gas emissions. The results show that battery and hydrogen fuel cell buses have reduced emissions, while compressed natural gas buses are currently the better option. However, battery electric buses are projected to become the best option by 2023, followed by hydrogen fuel cell buses from 2027 onwards. The transition to zero-emission technologies in Argentina's urban bus fleet would significantly reduce carbon dioxide equivalent emissions and energy consumption.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Mechanical
Mario Sansone, Salvatore Ameduri, Antonio Concilio, Enrico Cestino
Summary: This paper presents a systematic study on SMA torsional actuators, addressing the challenges in designing such devices and bridging the gap between theoretical ideas and practical implementation. The preliminary design steps using state-of-the-art FEM software are reported, along with a thorough examination of the behavior of SMA rods under mechanical and thermal loading. The paper also provides insights into the macroscopic phenomena involved during phase transformations by monitoring stress, temperature, torque, and martensite evolution. Simple aerodynamic load predictions for different aircraft classes are performed using Xfoil.
Article
Energy & Fuels
G. Correa, F. Volpe, P. Marocco, P. Munoz, T. Falaguerra, M. Santarelli
Summary: This study investigates the technoeconomic feasibility of green hydrogen production in Argentine Patagonia and its subsequent transport to Italy. The results show that producing hydrogen in Patagonia and using liquid organic hydrogen carriers for storage and transport is the most cost-effective solution, due to the high wind potential in the region.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Alessandro Polla, Giacomo Frulla, Enrico Cestino, Raj Das, Pier Marzocca
Summary: This article presents a numerical methodology for simulating advanced composite joints. The methodology is able to accurately predict the progressive damage and failure analysis of the joints under different loads. It offers a rational approach to designing damage-tolerance composite structures.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Cesare Patuelli, Enrico Cestino, Giacomo Frulla, Federico Valente
Summary: This research focuses on the application of a beam finite element to simulate bending-torsion coupling in box-beam structures with curvilinear stiffeners. The stiffener path is optimized to achieve the desired coupling effect, taking into account geometric constraints related to additive manufacturing production method. The results demonstrate that the beam finite element accurately represents the static behavior of beam structures with curvilinear stiffeners and shows the possibility to uncouple bending-torsion behavior by adjusting the stiffener orientation. Simulation of a laser powder bed fusion process opens new opportunities for stiffened panel manufacturing.
Article
Engineering, Aerospace
Cesare Patuelli, Enrico Cestino, Giacomo Frulla
Summary: This research introduces a new beam finite element model that can predict the static and dynamic behavior of beam structures with bending-torsion coupling. The derived model establishes a relation between the bending and torsional nodal degree of freedom of a two node beam element. The equilibrium equations are derived neglecting non-linear terms, while the stiffness and mass matrices are derived using Galerkin's method. The model has been validated through numerical and experimental results, showing good agreement for static deformations, natural frequency prediction, and mode shape similarity.
Article
Engineering, Aerospace
Alessandro Polla, Giacomo Frulla, Enrico Cestino, Raj Das, Pier Marzocca
Summary: This study presents a coupled thermo-mechanical modeling technique and its numerical simulations for analyzing carbon fiber-reinforced composite panels subjected to high-velocity impact. By determining the essential numerical parameters through a physical-based approach, the trial-and-error calibration process is minimized. New observations regarding modeling techniques, energy transfer, and damage mechanisms in target plates are offered.
Article
Chemistry, Physical
Cesare Patuelli, Enrico Cestino, Giacomo Frulla, Federico Valente, Guido Servetti, Fabio Esposito, Luca Barbero
Summary: Dimensional accuracy is a major concern in selective laser melting (SLM) parts manufacturing. This research presents a geometry for process parameter calibration and verifies it through industrial computed tomography (iCT) and thermo-mechanical finite element simulation. The results show good accordance between the simulated and actual products.
Article
Energy & Fuels
N. Ibagon, P. Munoz, V. Diaz, E. Teliz, G. Correa
Summary: This study develops a techno-economic optimization model to determine the capacity of renewable energy generation, electrolyzer, storage system, and hydrogen transport that minimizes the cost of hydrogen production in Uruguay. It also analyzes the impact of hydrogen demand scale and technological maturity on the cost of production and each stage of the chain.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
T. Humana, A. Sigal, P. Munoz, E. Franceschini, G. Correa
Summary: Argentina has abundant renewable resources that can be used for rapid incorporation of hydrogen as fuel in the transportation sector. This study analyzes the cost and emissions associated with different production sources and pathways in the hydrogen supply chain. The findings show that hydrogen produced from renewable energy sources or the carbon-intensive grid can reduce costs and emissions compared to compressed natural gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
N. Ibagon, P. Munoz, G. Correa
Summary: This study analyzes a techno-economic optimization tool for evaluating off-grid green hydrogen production costs. The tool determines the optimal renewable energy power plants, electrolyzer and storage capacities, and hydrogen transport form to minimize the levelized cost of hydrogen. It considers a wide range of inputs, such as economic incentives, technology limitations, and contractual characteristics.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Aerospace
Enrico Cestino, Giacomo Frulla, Paolo Piana, Renzo Duella
