Article
Chemistry, Physical
E. MacA Gray, C. J. Webb
Summary: The pressure-composition isotherm is the most important measurement for a new hydrogen storage material, which captures the storage conditions and the amount of hydrogen stored. The Sieverts technique is the most popular experimental approach for constructing such isotherms, where the amount of hydrogen absorbed or desorbed by the sample can be inferred from measurements of the hydrogen pressure. This study discusses the factors contributing to good performance and presents a Figure of Merit for evaluating the apparatus performance in combination with the sample.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
L. Naheed, K. E. Lamb, E. MacA. Gray, C. J. Webb
Summary: Calculating gas sorption isotherms requires accurate knowledge of the void volume in the sample cell, which changes with sample variations. In experiments on porous materials, the adsorbate volume is typically considered the pore volume, and high pressure experiments are needed to extract information on adsorbate volume and density.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2021)
Article
Chemistry, Physical
Hongxing Zhu, Honghui Cheng, Donglei Chen, Zhi Ding
Summary: A compact volumetric apparatus has been developed for measuring hydrogen storage materials. It can provide various tests under different pressure and temperature conditions, and employs novel methods to improve testing efficiency and accuracy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Myoung-Youp Song, Young-Jun Kwak
Summary: We developed a method to determine the activation energy for hydride decomposition using a Sieverts-type apparatus and the Kissinger equation. The dehydriding rates were calculated based on measurements of hydrogen released and reactor temperature, and the Kissinger equation was applied to determine the activation energy.
Article
Chemistry, Analytical
Myoung Youp Song, Young Jun Kwak
Summary: In this study, the activation energy for dehydrogenation of Mg-5Ni samples was determined using thermal analysis methods and the Kissinger equation. Hydrogen release quantity and reactor temperature were measured, dehydrogenation rate and temperature change rate were calculated, and the activation energy was obtained.
Article
Chemistry, Physical
Selim Kazaz, Emanuel Billeter, Andreas Borgschulte
Summary: The 3D geometry of a hydrogen absorbing metal grain is mimicked by a membrane, allowing the reconstruction of the hydrogen distribution inside the membrane and analysis of the mechanism of hydride formation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Kaaviah Manoharan, Rajashabala Sundaram, Kannan Raman
Summary: This study focuses on the effective storage of hydrogen using a ball-milled core-shell nanocomposite. The experiment demonstrates that the prepared material has excellent hydrogen storage capacity and can serve as an electrode material for energy storage devices.
Article
Energy & Fuels
Radha Raman Chandan, C. R. Aditya, G. Chandra Shekara, R. Elankeerthana, K. Anitha, R. Sabitha, Ravishankar Sathyamurthy, V. Mohanavel, M. Sudhakar
Summary: The paper discusses how redundant data in deep learning can reduce training efficiency, while too little data can hinder capturing essential features. Using a machine-deep-statistical model, it analyzes the stability of thermal storage systems, demonstrating higher accuracy through simulation results.
Article
Chemistry, Physical
Gamze Atalmis, Mehmet Demiralp, Nebi Yelegen, Yuksel Kaplan
Summary: This study investigates the process parameters that affect the improvement of hydrogen storage material properties. The thermal conductivity of the storage materials has been improved to accelerate the hydrogen charge/discharge processes and obtain the required hydrogen at desired flow rates in a short time. The experimental results show that coating the storage material with copper increases heat transfer, reduces the hydrogen charging time, and improves stable discharge time in the metal hydride reactor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Analytical
Javier Martinez, David Asiain, Jose Ramon Beltran
Summary: This paper proposes a simple and fast calibration method for MEMS accelerometers, which can obtain characteristic parameters of three axes through a single test and extrapolate the data to the entire working range. This method is suitable for mass factory calibration.
Article
Engineering, Chemical
Zhigang Guo, Jian Yang, Shang Zhang, Zhoutuo Tan, Xing Tian, Qiuwang Wang
Summary: DEM is a powerful tool for solid granular, but requires more calibrations in heat transfer models due to simplifications. Improvements are needed in models to cover a wider range of solid-to-gas thermal conductivity ratio and dimensionless body distance. Ideal heat transfer paths may lead to larger deviations that can only be mathematically adjusted by empirical factors.
Article
Chemistry, Physical
K. Malleswararao, N. Aswin, Pramod Kumar, Pradip Dutta, S. Srinivasa Murthy
Summary: This paper investigates the application of metal hydrides in thermal energy storage and hydrogen storage. A low temperature hydride, La0.75Ce0.25Ni5, is experimentally studied for its hydrogen storage capacity and thermal energy storage capacity. The heat and mass transfer characteristics of a novel reactor design are also investigated.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
K. Malleswararao, Pramod Kumar, Pradip Dutta, S. Srinivasa Murthy
Summary: This study investigates the hydrogen storage characteristics and thermal storage performance of LaNi4.25Al0.75 alloy in the temperature range of 150°C-200°C. The alloy exhibits a hydrogen storage capacity of 1.20 wt% and can store a total thermal energy of 285.7 kJ.kg-1 and deliver heat at an average rate of 287.5 W.kg-1 with an efficiency of 64.1%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Johannes Hyvonen, Annukka Santasalo-Aarnio, Sanna Syri, Matti Lehtonen
Summary: This study evaluates the cost-effectiveness of utilizing energy storage systems to enhance residential photovoltaic electricity generation, finding that solar PV systems without selling surplus electricity to the grid are profitable under certain renewable fractions and market prices. Among the examined energy storage technologies, lithium-ion battery storage was found to be the most financially feasible option.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Qianhao Xiao, Boyan Jiang, Jun Wang, Xiaopei Yang
Summary: The genetic algorithm for enhancing the elite preservation strategy is extended to data-driven dimensional analysis and validated in the laminar boundary layer and the temperature difference characteristics of the Knudsen compressor. The research shows that the pressure rise, Poiseuille flow, and thermal transpiration flow of the Knudsen compressor have a first-order linear relationship with dimensionless numbers.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Inorganic & Nuclear
Nazanin Rahimi, Randolph Pax, Evan MacA. Gray
PROGRESS IN SOLID STATE CHEMISTRY
(2019)
Article
Chemistry, Physical
Nazanin Rahimi, Randolph A. Pax, Evan MacA Gray
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Engineering, Electrical & Electronic
Rasoul Garmabdari, Mojtaba Moghimi, Fuwen Yang, Evan Gray, Junwei Lu
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2020)
Article
Chemistry, Physical
Michael Hirscher, Volodymyr A. Yartys, Marcello Baricco, Jose Bellosta von Colbe, Didier Blanchard, Robert C. Bowman, Darren P. Broom, Craig E. Buckley, Fei Chang, Ping Chen, Young Whan Cho, Jean-Claude Crivello, Fermin Cuevas, William I. F. David, Petra E. de Jongh, Roman Denys, Martin Dornheim, Michael Felderhoff, Yaroslav Filinchuk, George E. Froudakis, David M. Grant, Evan MacA Gray, Bjorn C. Hauback, Teng He, Terry D. Humphries, Torben R. Jensen, Sangryun Kim, Yoshitsugu Kojima, Michel Latroche, Hai-Wen Li, Mykhaylo Lototskyy, Joshua W. Makepeace, Kasper T. Moller, Lubna Naheed, Peter Ngene, Dag Noreus, Magnus Moe Nygard, Shin-ichi Orimo, Mark Paskevicius, Luca Pasquini, Dorthe B. Ravnsbaek, M. Veronica Sofianos, Terrence J. Udovic, Tejs Vegge, Gavin S. Walker, Colin J. Webb, Claudia Weidenthaler, Claudia Zlotea
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Review
Chemistry, Inorganic & Nuclear
S. S. Setayandeh, C. J. Webb, E. Mac A. Gray
PROGRESS IN SOLID STATE CHEMISTRY
(2020)
Article
Chemistry, Physical
L. Naheed, K. E. Lamb, E. MacA. Gray, C. J. Webb
Summary: Calculating gas sorption isotherms requires accurate knowledge of the void volume in the sample cell, which changes with sample variations. In experiments on porous materials, the adsorbate volume is typically considered the pore volume, and high pressure experiments are needed to extract information on adsorbate volume and density.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2021)
Article
Chemistry, Physical
Samaneh Sadat Setayandeh, Tim Gould, Aminollah Vaez, Evan Gray
Summary: Density functional theory is increasingly used for predicting and understanding hydrogen storage materials, with good agreement on electron band structures but significant disparities in phonon band structures. Different calculation approaches may cause these disparities. The study found that electron bands have excellent agreement, while phonon properties are sensitive to calculated lattice constants.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Lubna Naheed, Miriam Koppel, Maarja Paalo, Khadija Alsabawi, Krystina E. Lamb, Evan MacA. Gray, Alar Janes, Colin J. Webb
Summary: The properties of the adsorbed hydrogen phase in three carbide derived carbons have been studied, and it was found that all three CDCs had the same maximum adsorbate density, with the adsorption proportional to the total pore volume.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
E. Math. Gray
Summary: A thermodynamic model is proposed to aid in selecting compatible pairs of hydrogen storage alloys for multi-stage metal-hydride compressors. The model is based on ideal compressor concept with constraints on alloy selection due to thermodynamic characteristics, including pressure hysteresis and plateau slope. Experimentally determined effects such as curved van ?t Hoff line are considered in a case study of a two-stage compressor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Samaneh Sadat Setayandeh, Tim Gould, Aminollah Vaez, Keith McLennan, Nicolas Armanet, Evan Gray
Summary: This study examined the calculation methods and results of the partial atomic volume of hydrogen in interstitial metal hydrides, finding that v(H) is rather robust against different calculation methods, allowing for a meaningful comparison and validation of theoretical and experimental results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Md Alamgir Hossain, Ripon K. Chakrabortty, Sondoss Elsawah, Evan Mac A. Gray, Michael J. Ryan
Summary: This study introduces a hybrid deep learning model to accurately forecast wind power generation at the Boco Rock Wind Farm in Australia, achieving significant improvements in accuracy compared to other advanced models through parameter tuning and optimization algorithm.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Chemistry, Physical
E. MacA Gray, C. J. Webb
Summary: The pressure-composition isotherm is the most important measurement for a new hydrogen storage material, which captures the storage conditions and the amount of hydrogen stored. The Sieverts technique is the most popular experimental approach for constructing such isotherms, where the amount of hydrogen absorbed or desorbed by the sample can be inferred from measurements of the hydrogen pressure. This study discusses the factors contributing to good performance and presents a Figure of Merit for evaluating the apparatus performance in combination with the sample.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Mostafa Rezaei, Alexandr Akimov, Evan MacA Gray
Summary: This study examines the sensitivity of the levelised cost of hydrogen (LCOH) produced from solar photovoltaic (PV) electricity to four critical factors. The results highlight the importance of carefully selecting the location to achieve a high PV capacity factor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Automation & Control Systems
Md Alamgir Hossain, Evan Gray, Junwei Lu, Md Rabiul Islam, Md Shafiul Alam, Ripon Chakrabortty, Hemanshu Roy Pota
Summary: This article proposes a novel framework, CEMOLS, to improve the prediction accuracy of very short-term wind power generation. The framework combines CEEMDAN, MBO, and LSTM models and demonstrates an improvement in forecasting accuracy compared to the benchmark model.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Energy & Fuels
E. MacA Gray, C. J. Webb
JOURNAL OF PHYSICS-ENERGY
(2020)