by Xiang-Yu Sun  , Ping-Hong Jhou  , Min-Ze Lu  and Chang-Ming Liaw

Received: 25 February 2021;  Published: 22 June 2021;  doi: 10.21926/jept.2102028

This paper presents the development of a wind Interior Permanent-Magnet Synchronous Generator (IPMSG) based bipolar DC microgrids along with various switch-mode rectifiers. Firstly, the wind IPMSG is established and adequately controlled to possess satisfactory generating characteristics during different driven speeds and loads. Later, the boost switch-mode rectifier (SMR) based bipolar DC bus is established. Further, three-phase single-switch (3P1SW) boost SMR, three-phase two-switch (3P2SW) three-level boost SMR, [...]

by Shih-Ang Hsu

Received: 16 April 2021;  Published: 16 June 2021;  doi: 10.21926/jept.2102025

During a tropical cyclone (TC) worldwide, the Regional and Mesoscale Meteorological Branch (RAMMB) of NOAA/NESDIS (http://rammb.cira.colostate.edu/) issues real-time TC surface wind analyses. The purpose of this article is to provide value-added estimations of several meteorological and oceanographic (met-ocean) parameters including overwater friction velocity and turbulence intensity, variation of the wind speed with height, significant wave height, peak or dominant wave period, wind-driven currents and wind-stres [...]

by Andrew C. Chien  , Eric Y. Lin  and Nicole J. Ye

Received: 26 April 2021;  Published: 11 June 2021;  doi: 10.21926/jept.2102024

The metallic copper, alkaline earth metal oxide, boron, and perovskite were incorporated on the surface of a Ni-cermet anode, and the performance of the modified Solid Oxide Fuel Cell (SOFC) anode was evaluated. The cell performance was analyzed by voltage-current characteristics (V-I curve) and H2-CH4 step reactions (P-t curve) in a potentiostatic mode. Besides, we also determined if a metallic phase or high electronic conductivity of the anode is important for a cell to perform well when H2 is used as a fuel, whe [...]

by Arianna Massaro  , Ana B. Muñoz-García  , Mariarosaria Tuccillo  , Michele Pavone  and Pier Paolo Prosini

Received: 02 November 2020;  Published: 10 June 2021;  doi: 10.21926/jept.2102022

The current state-of-the-art quantum mechanics methodologies were applied to derive information on the bulk and surface properties of the P2-type layered oxide Na0.85Li0.17Ni0.21Mn0.64O2 (NLNMO), a cathode material. The special quasi-random structure (SQS) approach was employed to identify the arrangement of Li, Ni, and Mn ions in a supercell containing 115 atoms. Both the cell parameters and atomic positions were determined from DFT-PBE+U calculations to highlight specific distortions induced by the dopants (Ni an [...]

by Ganisetti Vijay Kumar  , Min-Ze Lu  and Chang-Ming Liaw

Received: 19 December 2020;  Published: 31 May 2021;  doi: 10.21926/jept.2102023

This paper presents the development of a high-performance electric vehicle (EV) synchronous reluctance motor (SynRM) drive and its vehicle-to-grid (V2G) and vehicle-to-microgrid (V2M) bidirectional operations. The EV motor drive boostable DC-link voltage is established by a battery through a bilateral interface boost-buck DC-DC converter for good driving performance over a wide speed range. The motor efficiency is 92.3% near the rated load. In idle conditions, the embedded interface converter and inverter of the mo [...]

by George Z. Voyiadjis  and Peter I. Kattan

Received: 27 October 2020;  Published: 10 May 2021;  doi: 10.21926/jept.2102021

A robust mathematical method for the characterization of damage in carbon nanotubes is presented the presentation here is limited to elasticity. In this regard, the second and third order elastic stiffnesses are employed. All this is based on damage mechanics. The hypotheses of elastic strain equivalence and elastic energy equivalence are utilized. A new damage variable is proposed that is defined in terms of the surface area. This is in contrast to the classical damage variable which is defined in terms of the cro [...]

by Antonio Vázquez-López  , Marina García-Carrión  , Erlend Hall  , Anisa Yaseen  , Ilknur Kalafat  , María Taeño  , Junjie Zhu  , Xinyu Zhang  , Elif Arici  , Omer Suat Taskin  , David Maestre  , Emilio Nogales  , Pedro Hidalgo  , Julio Ramírez-Castellanos  , Bianchi Méndez  , Neslihan Yuca  , Smagul Karazhanov  , Erik S. Marstein  and Ana Cremades

Received: 09 November 2020;  Published: 08 May 2021;  doi: 10.21926/jept.2102020

Hybrid composites based on inorganic nanomaterials embedded into a polymer matrix have were synthesized and characterized. Oxide semiconductor nanoparticles (SnO, SnO2, TiO2, Ga2O3, and NiO) and Si nanoparticles were employed as inorganic counterparts in the hybrid composite, while a conductive polymer (PEDOT:PSS) with diverse additives was used as the organic matrix. The composites were spin-coated on Si or glass substrates. The potential use of these materials in photovoltaic devices to improve Si surface passiva [...]

by Nobuyuki Imanishi  , Tao Zhang  , Daishuke Mori  , Sou Taminato  , Yashuo Takeda  and osamu yamamoto

Received: 21 February 2021;  Published: 08 May 2021;  doi: 10.21926/jept.2102019

Because lithium metal exhibits high specific capacity and low potential, it is the best candidate for fabricating anodes for batteries. Rechargeable batteries fabricated using lithium anode exhibit high capacity and high potential cathode; these can be potentially used to fabricate high energy density batteries (>500 Wh kg-1) that can be used for the development of next-generation electric vehicles. However, the formation and growth of lithium dendrites and the low coulombic efficiency recorded during lithiu [...]

by Yi-Chun Hsu  , Min-Ze Lu  and Chang-Ming Liaw

Received: 18 December 2020;  Published: 28 April 2021;  doi: 10.21926/jept.2102018

This paper proposes a Wind Turbine Emulator (WTE) using an Indirect Field Oriented (IFO) Induction Motor (IM). The IM drive can be controlled as a conventional prime mover in speed mode, or a wind turbine in torque-speed mode via robust observed torque control. This paper presents key issues for establishing a high-performance IFO IM drive. Further, this study develops a wind turbine load Interior Permanent-Magnet Synchronous Generator (IPMSG) followed by a three-phase Vienna Switch-Mode Rectifier (SMR). It receive [...]

by Oleksandr Skrylnyk  , Emilie Courbon  , Nicolas Heymans  and Marc Frère

Received: 18 December 2020;  Published: 14 April 2021;  doi: 10.21926/jept.2102017

Hybrid solar thermal systems are considered to be a promising solution for delivering clean thermal energy for the building sector, especially while combining them with other renewable energy sources. Usually, solar energy production does not match the thermal energy demand, and hence the energy storage must be integrated. Thermochemical energy storage is adapted particularly to be used along with solar thermal applications. In this article, the design of the combined solar thermochemical energy storage system is p [...]

by Chen-Wei Yang  , Min-Ze Lu  , Wei-Ming Ma  and Chang-Ming Liaw

Received: 23 December 2020;  Published: 07 April 2021;  doi: 10.21926/jept.2102016

This paper presents a three-phase full-bridge boost switch-mode rectifier (SMR) fed switched-reluctance motor (SRM) drive with energy storage buffer. First, the power circuits and control schemes of the two power stages are properly designed. Except for having good line drawn power quality, the boostable DC-link voltage of the SRM drive can enhance the SRM driving performance in wide speed range. And the recovered regenerative braking energy can be sent back to the grid successfully. Then, a battery storage system [...]

by Anna Castaldo  , Emilia Gambale  and Giuseppe Vitiello

Received: 19 January 2021;  Published: 02 April 2021;  doi: 10.21926/jept.2102015

This study deals with the production of zinc silicate thin films employing a solid-state reaction at temperatures ranging from 300 °C to 560 °C, to develop new inorganic, n-type materials with seemingly incompatible properties as low work function, high mobility, and high visible transmittance. Depending on a careful reaction control, zinc silicates can preserve reagents (silicon and/or ZnO) as nanoaggregate guests, exhibiting tunable light absorption and emission properties that make them useful for differ [...]

by Shih-Ang Hsu

Received: 21 December 2020;  Published: 24 March 2021;  doi: 10.21926/jept.2101014

In order to improve offshore wind power operation and maintenance (O&M), particularly during tropical and non-tropical cyclones, short-term forecasts or nowcasts up to 6 hours of meteorological and oceanographic (met-ocean) parameters including wind, waves, currents and turbulence intensity are needed. On the basis of numerous air-sea and wind-wave interaction experiments, datasets are analyzed including those from simultaneous measurements of wind and waves during Hurricane Wilma. Formulas are presented for nowcas [...]

by Peter Leary  and Peter Malin

Received: 30 November 2020;  Published: 19 March 2021;  doi: 10.21926/jept.2101013

In interest of accurately modelling wellbore production in convective geothermal systems, we draw attention to two approaches to numerical simulation of crustal fluid flow. The historical "strong" approach simulates the fluid mass conservation condition on a localised finite difference mesh approximation to poroelastic continua. The more flexible "weak" approach globally enforces fluid mass conservation by in effect integrating over all numerical mesh cells. Strong formulation crustal flow simulation emerged from n [...]

by Aurore Raoux  , Ilan Robin  , Jean-Philippe Pezy  , Anne-Claire Bennis  and Jean-Claude Dauvin

Received: 08 October 2020;  Published: 17 March 2021;  doi: 10.21926/jept.2101012

The French coast of the Atlantic and English Channel (EC) is promising for the development of Marine Renewable Energy (MRE), including wind, wave, and tidal stream, due to the high velocity of currents in some parts of the area. This paper, focusing on wind and tidal energy, discusses how the implementation of MRE converters influences biodiversity, and vice versa, through biofouling and reef effects. The understanding of these interactions requires the knowledge of the hydro-sedimentary conditions and the macrofau [...]

by Aly Mousaad Aly  and Milad Rezae

Received: 26 December 2020;  Published: 04 March 2021;  doi: 10.21926/jept.2101011

During their lifecycle, wind turbines can be subjected to multiple hazard loads, such as high-intensity wind, earthquake, wave, and mechanical unbalance. Excessive vibrations, due to these loads, can have detrimental effects on energy production, structural lifecycle, and the initial cost of wind turbines. Vibration control by various means, such as passive, active, and semi-active control systems provide crucial solutions to these issues. We developed a novel control theory that enables semi-active controller tuni [...]

by Hironori Takagi  , Koichi Kakimoto  , Daishuke Mori  , Sou Taminato  , Yashuo Takeda  , osamu yamamoto  and Nobuyuki Imanishi

Received: 12 January 2021;  Published: 24 February 2021;  doi: 10.21926/jept.2101010

The demand for high energy density rechargeable batteries beyond lithium-ion batteries has increased for electric vehicles. In the present study, a novel high energy density rechargeable aqueous lithium battery was proposed. The battery was composed of a lithium metal anode, a lithium-stable non-aqueous electrolyte, a water-stable lithium-ion conducting solid electrolyte of Li1.4Al0.4Ge0.2Ti1.4(PO4)3-epoxy-TiO2 separator, and a hydroquinone sulfonic acid (HQS)/benzoquinone sulfonic acid (BQS) redox couple in an aqu [...]

by F.A Hamad  , E. Emenike  , Abbas Mohammed  , S. Gooneratne  and P. Russell

Received: 01 December 2020;  Published: 31 January 2021;  doi: 10.21926/jept.2101009

In this paper, the primary aim is to look at the fundamental melting/solidification processes of polyethylene glycol 1500 (PEG 1500) for energy storage - insulation to prolong the cooling time of pipelines in unexpected shut-down conditions, prevent/minimize the wax deposition, and hydrate formation. Polyethylene glycol 1500 was selected because its melting temperature is >317 K making it a suitable candidate as lagging material to prevent wax deposition and hydrate formation in subsea oil pipelines. Experim [...]

by Han Zhang  and Joseph D. Smith

Received: 09 November 2020;  Published: 30 January 2021;  doi: 10.21926/jept.2101008

Solar thermochemical reactor provides an attractive approach that utilizes the most common solar radiation as the thermal driving force to motivate the reaction between CO2 and metal oxides, which is also called metal oxide redox pair-based thermochemical cycles. The CeO2/CeO2-δ is widely used in the two-step redox process due to its advantages including fast-redox kinetics, high crystallographic stability of a wide range of reacting oxygen non-stoichiometry, and relatively high oxygen solid-state conductivit [...]

by Oscar Daoura  , Maya Boutros  and Franck Launay

Received: 01 September 2020;  Published: 26 January 2021;  doi: 10.21926/jept.2101007

CO2 reforming of CH4, also referred to as the Dry Reforming of Methane (DRM), is considered an excellent method to produce H2 and CO (syngas), which are known to be used for the production of higher alkanes and oxygenates. Despite nickel’s moderate toxicity, Ni-based heterogeneous catalysts are considered excellent candidates for use in DRM due to their reasonable performances and economic advantages. However, these materials also present severe drawbacks, such as sintering of the active phase and coke (carbo [...]

by Chaonan Zhang  , Robert Fuller  and Iyad Hijazi

Received: 10 November 2020;  Published: 25 January 2021;  doi: 10.21926/jept.2101006

The Pd-H system has attracted extensive attention. Pd can absorb considerable amount of H at room temperature, this ability is reversible, so it is suitable for multiple energy applications. Pd-Ag alloys possess higher H permeability, solubility and narrower miscibility gap with better mechanical properties than pure Pd, but sulfur poisoning remains an issue. Pd-Cu alloys have excellent resistance to sulfur and carbon monoxide poisoning and hydrogen embrittlement, good mechanical properties, and broader temperature [...]

by Lucy Wyatt

Received: 24 November 2020;  Published: 22 January 2021;  doi: 10.21926/jept.2101005

This paper presents the case for the use of HF radar to provide wave, current and wind measurements and maps during the surveying, resource and impact assessment, construction, maintenance and performance assessment phases of an offshore fixed or floating wind farm or other marine renewable project. The data presented are from the Celtic Sea which is currently the focus of a lot of offshore wind interest. The data are from a dual radar system deployed at the Wave Hub site off the Cornwall coast since 2011, a single [...]

by Khaliq Ahmed  , Periasamy Vijay  , Moses Tadé  , Amirpiran Amiri  , Zongping Shao  and Karl Föger

Received: 31 July 2020;  Published: 18 January 2021;  doi: 10.21926/jept.2101004

This report is an account of research and development activities undertaken by the Centre for Process Systems Computations, Department of Chemical Engineering at Curtin University, Western Australia in the area of solid oxide fuel cells. The focus of work of the group included 1)effect of cell macrostructure and microstructure on electrochemical performance with a view to optimise both macro- and micro-structure 2) electrochemistry modeling for simulating electrochemical performance 3) internal reforming aspects im [...]

by Steven Hespeler  and Donovan Fuqua

Received: 31 July 2020;  Published: 12 January 2021;  doi: 10.21926/jept.2101003

This investigation presents a data-driven Long-short Term Memory battery model for predicting State of Charge for lithium-ion batteries LiFePO4 for next-generation vehicle operations. Our modified algorithm builds and updates a model using multivariate inputs that include physical properties, voltage, current, and ambient temperature during operations. The primary research goal is to improve prediction performance on future values from multiple training examples using an online learning scheme. Initial results demo [...]

by Journal of Energy and Power Technology Editorial Office

Received: 07 January 2021;  Published: 07 January 2021;  doi: 10.21926/jept.2101002

The editors of Journal of Energy and Power Technology would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2020. We greatly appreciate the contribution of expert reviewers, which is crucial to the journal's editorial process. We aim to recognize reviewer contributions through several mechanisms, of which the annual publication of reviewer names is one. Reviewers receive a voucher entitling them to a discount on their next LIDSEN publication and can download a cer [...]