by Rui Wang  , Omar M. Basha  , Husain E. Ashkanani  , Bingyun Li  and Badie I. Morsi

Received: 19 August 2024;  Published: 21 November 2024;  doi: 10.21926/jept.2404022

CO2 capture processes using five chemical solvents were modeled in Aspen Plus V.12.1 for the capture of over 90% CO2 from a 456 ton/hour split flue gas stream containing 12.02 mol% CO2 emitted by the Longview 780 MW power plant (West Virginia, USA). Since the flue gas contained 33.10 ppmv SO2 and 35.47 ppmv NO2, a gas polishing process, using deionized water (DIW), was included in the model for complete scrubbing of SO2 and NO2 from the raw flue gas before the CO2 capture process. The five chemicals used for CO2 ca [...]

by Minyang Wang  , Daming Zhang  and Liang Yuan

Received: 15 July 2024;  Published: 15 November 2024;  doi: 10.21926/jept.2404021

As the penetration level of inverter-based generators continues to increase, it becomes crucial to reduce power oscillations between inverters and synchronous generators (SG) to improve system stability. This paper uses a multimachine system as the research platform and proposes a grid separation method employing a multi-terminal back-to-back converter. The converter is designed to be placed at the point of common coupling (PCC) in the original multimachine system and can divide the original grid into multiple micr [...]

by Marco Antonio Gaya de Figueiredo  , Luiza G. dos Santos  , Rômulo Luciano Nascimento  and Harrison Lourenço Corrêa

Received: 18 April 2024;  Published: 11 November 2024;  doi: 10.21926/jept.2404020

Hydrogen is crucial in various industrial sectors and can be obtained through different synthesis routes. However, a significant portion of its production still relies on chemical processes involving fossil fuels, resulting in hydrogen and the generation of greenhouse gases (GHGs) as the final byproduct. In alignment with the goals of the 2030 Agenda, where countries commit to implementing energy transition, hydrogen obtained through a green route has been increasingly explored by governmental and academic entities [...]

by Fatemeh Mollaamin

Received: 15 August 2024;  Published: 07 November 2024;  doi: 10.21926/jept.2404019

A comprehensive investigation on hydrogen grabbing by SiO-GeO was carried out, including DFT computations at the CAM-B3LYP-D3/6-311+G (d,p) level of theory. The data shows that if silicon elements are replaced by germanium, the H-grabbing energy will be ameliorated. Electromagnetic and thermodynamic properties of SiO, GeO, and SiO-GeO nanoclusters have been evaluated. The hypothesis of the hydrogen adsorption phenomenon was confirmed by density distributions of PDOS and LOL for hydrated nanoclusters of H-SiO, H-GeO [...]

by Kwami Eli Baba  , Guy Pluvinage  and Julien Capelle

Received: 06 August 2024;  Published: 31 October 2024;  doi: 10.21926/jept.2404018

Ammonia is a toxic gas and can cause tragic consequences for humans. The damage level depends on concentration and duration of exposure. The security length associated with the risk of a tank leak at the acute exposure level of 30 ppm (AEGL-1) has been computed. Two tools have been combined: the CTOA criterion and the ALOHA software. The CTOA, a measure of fracture resistance against ductile crack propagation, is implemented in Abaqus software to compute the size of a breach in a tank submitted to internal pressure [...]

by Maxim Rusakov  and Faraz Farhidi

Received: 11 May 2024;  Published: 20 September 2024;  doi: 10.21926/jept.2403017

This initiative aims to enhance the efficiency of utility demand response (DR) operations by coordinating and integrating behind-the-meter (BTM) photovoltaic systems (PV) and energy storage (ES) using innovative machine learning software applications embedded in a distributed control architecture. The project is in the process of creating distributed energy resource (DER) learning agents and optimization engine within a hierarchical and layered distributed control architecture (DCA). These components work together [...]

by Antonio José Steidle Neto  and Daniela de Carvalho Lopes

Received: 28 April 2024;  Published: 26 August 2024;  doi: 10.21926/jept.2403016

Minas Gerais is the leading milk-producing state in Brazil, and many dairy activities are supplied with electricity by the cable aerial network of the electrical energy state company. Given that the Brazilian energy matrix relies primarily on hydroelectric power, studies on the potential of other renewable energy sources in the context of dairy farms are innovative. Additionally, frequent disturbances and interruptions have motivated the installation of solar energy systems on dairy farms. However, the scarcity of [...]

by Rajesh Karki  and Binamra Adhikari

Received: 02 April 2024;  Published: 07 August 2024;  doi: 10.21926/jept.2403015

The integration of cyber and physical layer of the grid has not only introduced a microscopic spectacle to observe and ensure the efficient flow of electricity but has also exposed the interdependencies of the network. These cyber-physical interdependencies are often exploited in the form of cyber-attacks that can disable a grid introducing substantial financial losses and observable social repercussions. Thus, it is important to address the impending Achilles heel by devising pragmatic approaches to comprehensibly [...]

by Michel Boukar  , Etienne Tchoffo Houdji  , Dimitri Valdes Tchuindjang Kwatchie  , Guy Bertrand Tchaya  and Danwe Raidandi

Received: 25 March 2024;  Published: 01 August 2024;  doi: 10.21926/jept.2403014

Many sensible heat storage materials are regularly used as thermal energy storage (TES) systems to improve the efficiency of solar dryers. The present work focuses on the effects of the volume and particle sizes of a volcanic stone (pozzolan) for the same purpose. Samples soaked in matt black and without soaking were also considered. Heat charge and discharge tests were carried out by exposing the pozzolan contained in a solar collector of the direct solar dryer (DSD) and indirect solar dryer (ISD) to the sun. Char [...]

by Assohoun Fulgence Kraidy  , Islam M. El Radaf  , Andreas Zeinert  , Abdelilah Lahmar  , Aime Pelaiz-Barranco  , Pardis Simon  and Yaovi Gagou

Received: 29 March 2024;  Published: 17 July 2024;  doi: 10.21926/jept.2403013

In this study, tin antimony sulfide (SnSb2S5) thin films with 200 nm, 312 nm, and 431 nm thicknesses were successfully fabricated using thermal evaporation. These films' structural, optical, and photoanode properties were meticulously characterized to assess their suitability for photovoltaic applications. X-ray diffraction (XRD) analysis confirmed the presence of an orthorhombic symmetry phase within the Pnma space group, ensuring the crystalline quality of the films. Raman spectroscopy further validated the cryst [...]

by Adrian Krzysztof Antosik  , Karolina Mozelewska  and Marcin Bartkowiak

Received: 29 February 2024;  Published: 13 May 2024;  doi: 10.21926/jept.2402012

The investigation aimed to delve into the intricate relationship between the presence of titanium dioxide and the resulting alterations in the adhesive's behavior under different conditions. The focus extended beyond mere observation to understand how these additives interact with the adhesive matrix, potentially imparting beneficial attributes. Notably, the study delved into the optimization of thermal stability, the extension of the adhesive's functional lifespan, and the mitigation of shrinkage tendencies. This [...]

by Gilbert Ahamer

Received: 07 December 2023;  Published: 13 May 2024;  doi: 10.21926/jept.2402011

The present need for an energy transition in the wake of a global climate catastrophe led to the “EU green deal” which requires a transition of the energy system in all countries. This study aimis survey aims to identify strategies within such an energy transition based on global trend analyses and reports on available technologies for implementation. Based on a literature analysis of over 300 pieces (of feasibility studies and technology implementation reports with a focus on Central Europe) and a statistical anal [...]

by Jesse Tanko Zarmai  , Isaac Ibitoye Alabi  , Ebimene Ezekiel Ebisine  , Musa Tanko Zarmai  and Ovis D. Irefu

Received: 26 September 2023;  Published: 03 April 2024;  doi: 10.21926/jept.2402010

Inadequate electricity supply is a global challenge that needs solutions. This situation has compelled the purchasing of fossil fuel-generating units for use in residential, commercial, and industrial sectors to generate electricity. However, using fossil fuel generating units cause greenhouse gas emissions, bringing about environmental pollution and ultimately resulting in climate change. In particular, educational institutions require adequate and reliable power supply to ensure proper learning and teaching, whic [...]

by Peter Jones  and Martin Wynn

Received: 17 February 2024;  Published: 01 April 2024;  doi: 10.21926/jept.2402009

The purpose of this article is to examine the approach to waste management of local authorities in England, to investigate their strategic objectives, and to ascertain to what extent sustainability and circular economy practices are in evidence in this context. A qualitative, inductive research method is used, based on an examination of secondary documentation in three local authorities in England in Birmingham, Bristol and Newcastle upon Tyne. The findings reveal considerable common ground within the three authori [...]

by Carsten Croonenbroeck  and David Hennecke

Received: 06 February 2024;  Published: 15 March 2024;  doi: 10.21926/jept.2401008

We address the Wind Farm Layout Optimization (WFLO) problem and tackle the optimal placement of several turbines within a specific (wind farm) area by incorporating additional aspects of an economically driven target function. With this, we contribute three refinements for WFLO research: First, while many research contributions optimize the turbines' locations subject to maximum energy production or energy efficiency, we instead pursue a strategy of maximizing a profit objective. This enables us to incorporate inne [...]

by Jose Benavides  , Pushpesh Sharma  , Ahmed Al Saedi  and Shah Kabir

Received: 20 November 2023;  Published: 21 February 2024;  doi: 10.21926/jept.2401007

This article outlines an innovative approach to explore thermal energy extraction for power generation or industrial hot water applications. Unlike traditional steady-state models, this approach embraces time-variant scenarios, explicitly incorporating a cyclical fluid circulation strategy to maintain a stable surface fluid temperature or power output. By introducing an increasing and decreasing stepwise rate sequence and an intermittent circulation strategy, the method aims to optimize efficiency in response to va [...]

by Gerasimos Rigatos  , Pierluigi Siano  , Mohammed AL-Numay  , Masoud Abbaszadeh  and Gennaro Cuccurullo

Received: 16 September 2023;  Published: 21 February 2024;  doi: 10.21926/jept.2401006

This article aims to treat the nonlinear control problem for the complex dynamics of a wave energy unit (WEC) that consists of a Permanent Magnet Linear Synchronous Generator (PMLSG) and a Voltage Source Converter (VSC). The article has developed a globally stable nonlinear optimal control method for this wave power generation unit. The new method avoids complicated state-space model transformations and minimizes the energy dispersion by the control loop. A novel nonlinear optimal control method is proposed for the [...]

by Dimitrios N. Konispoliatis

Received: 09 December 2023;  Published: 07 February 2024;  doi: 10.21926/jept.2401005

The main challenge in designing offshore renewable energy structures is to ensure their structural integrity on a life cycle basis while operating in harsh environments and, in parallel, being financially competitive and environmentally friendly concerning other types of energy systems. The Oscillating Water Column (OWC) converters are among the first energy converters to be developed and deployed into the sea due to their relative simplicity of operation and relatively small number of moving parts. This review pro [...]

by Ashraf Zaghwan  , Yousef Amer  , Mahmoud Efatmaneshnik  and Nagi Abdussamie

Received: 24 July 2023;  Published: 06 February 2024;  doi: 10.21926/jept.2401004

The economic impact of energy loss stemming from end-user electricity consumption is a significant concern, with historical trends revealing escalating costs. Effectively managing both peak and off-peak demands remains a formidable challenge due to the unpredictable nature of consumer behaviors, leading to energy wastage. This study delves into the nexus of demand uncertainty, financial repercussions, and potential strategies to mitigate energy losses in the evolving landscape of electricity consumption.that causes [...]

by Mohammad Forhad  , Mehedi Hasan Shakil  , Md.Rashidul Islam  , Muhammed Y. Worku  and Md Shafiullah

Received: 20 June 2023;  Published: 30 January 2024;  doi: 10.21926/jept.2401003

The prolonged presence of low-frequency oscillation (LFO) in power system networks (PSN) poses a significant threat to their stability. Hence, engineers and researchers have continuously developed effective strategies to mitigate the issue and enhance the stability of the PSN. This article proposes a new approach using the African Vultures Optimization Algorithm (AVOA) to design robust Power System Stabilizers (PSS) and enhance the LFO damping in multi-machine networks. The damping ratio-based objective function mi [...]

by Vincent Anayochukwu Ani

Received: 06 August 2023;  Published: 24 January 2024;  doi: 10.21926/jept.2401002

Energy is a prerequisite to running health facilities and is, therefore, key to the success of the service. Karshi primary healthcare centre (PHC) facility is confronted with an unreliable power supply that leads to a high cost of generating power from diesel to operate its equipment. This facility needs a sustainable and reliable electricity supply and therefore a change in their energy system to enable it improve its quality of healthcare delivery services. A solar energy-based electricity generation system that [...]

by Journal of Energy and Power Technology Editorial Office

Received: 04 January 2024;  Published: 05 January 2024;  doi: 10.21926/jept.2401001

The editors of Journal of Energy and Power Technology would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2023. 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 can download a certificate of recognition directly from our submission system. Additionally, reviewers can [...]

by Daming Zhang  and Xiuhui Tang

Received: 01 September 2023;  Published: 29 November 2023;  doi: 10.21926/jept.2304039

Large-scale autonomous microgrids have potential application values as they can increase renewable energy penetration level without compromising the stability of the existing large power systems. Before their widespread implementation, critical issues like stability analysis etc need to be solved. This paper analyses the stability in an autonomous microgrid operated at constant frequency with the consideration of reactive power balance. Difference equations of reactive power for the grid-forming generator are const [...]

by Minggao Zhou  , Yongren Feng  , Yongzeng Xue  , Yanmin Zhou  , Yongchao Chen  and Wilson C. Chin

Received: 12 April 2023;  Published: 27 November 2023;  doi: 10.21926/jept.2304038

An early formation tester operating a “sink probe” that extracts fluids from the borehole, also measures pressures at its location; pressures are additionally collected at two passive sensors, one situated 180 deg away and the second about meter axially. These positions are not conducive to accurate permeability predictions, since pressure transient signals used for inverse analysis attenuate very rapidly. Closer probe spacings offer formation evaluation advantages at low mobilities because Darcy pressure dissipati [...]

by Brian D. Barkdoll

Received: 26 May 2023;  Published: 21 November 2023;  doi: 10.21926/jept.2304037

Global climate change has necessitated the reduction of GHG emissions. Water distribution system (WDS) pumping adds to these emissions and, therefore, should be reduced. Under electricity hourly cost tariffs, utilities are incentivized to pump during the nighttime hours. This can have a deleterious effect, however, on GHG emissions. To quantify this effect, a modeling study of twelve real WDSs was performed with an electricity tariff. The systems all had the typical tank-level-based pump controls but also time-base [...]