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Open Access Editorial

Acknowledgement to Reviewers of Journal of Energy and Power Technology in 2021

Received: 05 January 2022;  Published: 06 January 2022;  doi: 10.21926/jept.2201001

Abstract

The editors of Journal of Energy and Power Technology would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2021. 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 [...]

1264 8298

Open Access Research Article

Harvesting the Potential of CO2 before it is Injected into Geological Reservoirs

Received: 28 October 2021;  Published: 22 December 2021;  doi: 10.21926/jept.2104050

Abstract

To store CO2 in geological reservoirs, expansion valves have been used to intentionally release supercritical CO2 from high-pressure containers at a source point to lower-pressure pipelines and transport to a selected injection site. Using expansion valves, however, has some shortcomings: (i) the fluid potential, in the form of kinetic energy and pressure which can produce mechanical work or electricity, is wasted, and (ii) due to the Joule-Thomson cooling effect, the reduction in the temperature of the released CO [...]

2613 10520

Open Access Review

Potential of Coupling Heavy Metal (HM) Phytoremediation by Bioenergy Plants and Their Associated HM-Adapted Rhizosphere Microbiota (Arbuscular Mycorrhizal Fungi and Plant Growth Promoting Microbes) for Bioenergy Production

Received: 22 July 2021;  Published: 14 December 2021;  doi: 10.21926/jept.2104049

Abstract

There is growing concern for the contamination of our soils and waters worldwide with heavy metals (HMs), as a result of indiscriminate use of agrochemicals for feeding growing population which require optimal use of resources and sustainable agricultural strategies. This can be simultaneously achieved by using microbes as bio-fertilizers, bio-protectants, and bio-stimulants, and suitable phytoremediation- plant capable of removing heavy metals contaminants from contaminated sites. There is a growing need to adopt [...]

1461 10961

Open Access Research Article

The Drag Forces on a Taylor Bubble Rising Steadily in Vertical Pipes

Received: 04 October 2021;  Published: 07 December 2021;  doi: 10.21926/jept.2104048

Abstract

By the adoption of a drag-buoyancy equality model, analytical solutions were obtained for the drag coefficients (CD) of Taylor bubbles rising steadily in pipes. The obtained solutions were functions of the geometry of the Taylor bubble and the gas volume fraction. The solutions were applicable at a wide range of Capillary numbers. The solution was validated by comparison with experimental data of other investigators. All derived drag formulas were subject to the condition that Bond number >4, for air-water syste [...]

1769 10275

Open Access Original Research

Effect of Mineral Additives on Fusion Behavior of Agricultural Residue Ashes during Combustion or Co-combustion with Lignite

Received: 06 September 2021;  Published: 11 November 2021;  doi: 10.21926/jept.2104047

Abstract

In this work, the conducted chemical, mineralogical, fusibility, and thermogravimetric analyses and calculated the slagging/fouling indicators for predicting deposition tendencies in boilers to study the ash fusibility behavior of selected agricultural residues and their blends with lignite. Two additives, bauxite, and clinochlore, were used at varying amounts to reduce ash melting, followed by examining their anti-fusion mechanisms. Initial deformation and softening temperatures of biomass materials were low for c [...]

2142 12092

Open Access Research Article

Variation of CO2-Brine Contact Angles on Natural Rocks of Different Compositions

Received: 05 September 2021;  Published: 05 November 2021;  doi: 10.21926/jept.2104046

Abstract

Contact angles were measured for CO2-brine interactions on 20 different rocks that represent the properties of various CO2 storage depositional environments to characterize the wettability during geologic carbon storage. Three different CO2 phases (gaseous, liquid, and supercritical) were considered to investigate the effect of pressure and temperature. Bubbles were studied in two groups of larger and smaller than 500 μm, the latter being more relevant to pore scale. Variation was observed among contact angle measu [...]

2479 15106

Open Access Original Research

Hydrogen Storage in Cryogenic, Cybernetic, and Catalytic Vessels for Transport Vehicles

Received: 18 June 2021;  Published: 29 October 2021;  doi: 10.21926/jept.2104045

Abstract

Most of the hydrogen storage vessels meant for vehicles to run the electric motor via a fuel cell during transport are designed for drives of only a few tenths of kilometers per day. The present report, however, describes a vessel model that is conceived to hold the hydrogen energy only for short periods during transport, such as a few hours. This would include transport via a light-duty vehicle, a taxi, or a bus, which would load liquid hydrogen at a station every morning for the day. This is a simple model based [...]

1708 16897

Open Access Original Research

Advances in Wind Farm Layout Optimization: Wind Direction Robustness and Wake Induced Asymmetric Thrust Load

Received: 20 July 2021;  Published: 25 October 2021;  doi: 10.21926/jept.2104044

Abstract

In this study, we address the wind farm layout optimization (WFLO) problem and tackle the issue of optimal turbine placement by incorporating additional aspects of an economically driven target function. Firstly, we have analyzed the effect of wind direction on a given turbine arrangement. Based on the direction-dependent wake pattern, practitioners sometimes shut down certain turbines on their farms. Our method computes which turbines should be shut down in which wake situation. On this basis, we have developed a [...]

1228 8879

Open Access Review

Ion Transport in Organic Electrolyte Solutions for Lithium-ion Batteries and Beyond

Received: 24 May 2021;  Published: 27 September 2021;  doi: 10.21926/jept.2103043

Abstract

The performance of metal-ion batteries at low temperatures and their fast charge/discharge rates are determined mainly by the electrolyte (ion) transport. Accurate transport properties must be evaluated for designing and/or optimization of lithium-ion and other metal-ion batteries. In this review, we report and discuss experimental and atomistic computational studies on ion transport, in particular, ion diffusion/dynamics, transference number, and ionic conductivity. Although a large number of studies focusing on l [...]

3049 31219

Open Access Original Research

Development of the Flash Ironmaking Technology (FIT) for Green Ironmaking with Low Energy Consumption

Received: 28 June 2021;  Published: 23 September 2021;  doi: 10.21926/jept.2103042

Abstract

This article describes the development of a novel ironmaking technology based on flash reduction. The development started with the proof of the kinetic feasibility, considering that a typical flash reactor provides only a few seconds of residence time. This was followed by tests in a laboratory flash reactor and finally a pilot plant operation. The rate equations formulated in this work were developed considering the optimum combination of temperature, residence time, and reducing gas partial pressure to achieve &# [...]

2855 20131

Open Access Original Research

Aqueous Lithium--Air Batteries with High Power Density at Room Temperature under Air Atmosphere

Received: 30 June 2021;  Published: 23 September 2021;  doi: 10.21926/jept.2103041

Abstract

Rechargeable batteries with higher energy and power density exceeding the performance of the currently available lithium-ion batteries are suitable for application as the power source in electric vehicles (EVs). Aqueous lithium-air batteries are candidates for various EV applications due to their high energy density of 1910 Wh kg-1. The present study reports a rechargeable aqueous lithium-air battery with high power density at room temperature. The battery cell comprised a lithium anode, a non-aqueous anode electro [...]

1843 13631

Open Access Original Research

Energy Storage and Installed Wind Capacity Requirements for the Substitution of Fossil Fuels in the Electricity Generation Sector

Received: 19 April 2021;  Published: 10 September 2021;  doi: 10.21926/jept.2103040

Abstract

The impending adverse effects of Global Climate Change encourages the substitution of fossil fuels with non-carbon sources for electricity generation. However, while fossil fuel power plants may generate electric power at demand, the most abundant renewable energy sources-wind and solar-are intermittent or periodically variable. This necessitates the development of adequate energy storage at the utility/grid level. Using actual data for the hourly energy demand in the ERCOT electricity grid, this study examines the [...]

1490 10973

Open Access Research Article

GIS-based MCDM Approach for Wind Farm Site Selection - A Case Study

Received: 08 May 2021;  Published: 17 August 2021;  doi: 10.21926/jept.2103039

Abstract

The objective of this study is the development and implementation of a geographic information system (GIS)-based methodology to determine suitable sites for wind farms by using multicriteria decision making (MCDM) techniques. Many eligibility criteria are considered in this approach, such as GIS analysis is performed in combination with MCDM techniques, both for the criteria weighting process (using the analytical hierarchical process) and for the standardization/classification of the criteria values into a common [...]

2069 19734

Open Access Original Research

New Electrocatalysts Prepared by Co-Sputter Deposition for the Direct Oxidation of Methanol

Received: 25 May 2021;  Published: 13 August 2021;  doi: 10.21926/jept.2103038

Abstract

Direct methanol oxidation catalysts Pt1-x-Tax (0

1667 10958

Open Access Original Research

A Highly-efficiency Position Sensorless Electric Vehicle Synchronous Reluctance Motor Drive

Received: 02 May 2021;  Published: 11 August 2021;  doi: 10.21926/jept.2103037

Abstract

The development of high-efficiency motor drives for various applications is important in the industry 4.0 era, especially for their extensive application to electric vehicles (EVs). In this study, a position sensorless EV synchronous reluctance motor (SynRM) drive has been developed, which exhibits good driving performance and efficiency over a wide speed and load range. To solve the key problems popularly encountered in the existing approaches, the high-frequency injection (HFI) scheme based on q-axis injection ha [...]

1629 10257

Open Access Research Article

Maintenance Optimization of Wind Turbines Using Weather-Dependent Equivalent Age Model

Received: 26 April 2021;  Published: 04 August 2021;  doi: 10.21926/jept.2103036

Abstract

Aging models are important input into wind farm maintenance and financial viability models. Aging of wind turbines depends on many factors, including both ambient and usage conditions. This paper presents a virtual age based maintenance model for wind turbines considering the effect of wind speed and ambient air temperature on turbine aging. Two maintenance thresholds (i.e., corrective threshold and preventive threshold) and three repair actions (i.e., unscheduled corrective, scheduled corrective and preventive act [...]

1669 12145

Open Access Original Research

A Comparative Study of Structural, Optical and Electrical Properties of Fe-ZnO Nanoparticles Synthesized by Precipitation and Microwave Method for Photovoltaic Applications

Received: 12 May 2021;  Published: 04 August 2021;  doi: 10.21926/jept.2103035

Abstract

Iron doped ZnO (Fe-ZnO) nanoparticles were synthesized using two techniques that are economical as well as scalable to yield tunable properties of nanoparticles for facilitating down conversion in an absorbing layer of a solar cell. To evaluate the suitability of Fe-ZnO nanoparticles prepared by two deposition methods, we present a comparison of optical, electrical, and structural properties of Fe-ZnO using several experimental techniques. Structural properties were analyzed using transmission electron microscopy a [...]

1695 10573

Open Access Review

EnergyPlus-Towards the Selection of Right Simulation Tool for Building Energy and Power Systems Research

Received: 05 February 2021;  Published: 19 July 2021;  doi: 10.21926/jept.2103034

Abstract

This article offers the summary of detailed literature review on the state of the art of simulation tools for building energy and power system research. The fundamental capabilities required for building energy and power system analysis tools are outlined. A comparative review of different energy simulation tools is presented, along with the summary of their strengths and weaknesses. A review of energy simulation tool rankings using evidence-based research is presented. A novel aspect of this article is the investi [...]

3423 20528

Open Access Review

A Review on the Application of the MPC Technology in Wind Power Control of Wind Farms

Received: 23 April 2021;  Published: 15 July 2021;  doi: 10.21926/jept.2103033

Abstract

Due to the uncertainty and volatility of wind speed, its natural output power also exhibits strong volatility. In order to avoid the negative effects of the excessive fluctuation of the output power of wind turbines in the wind farm and the power grid, it is very important to accurately predict and reasonably plan and control the output power of the wind farm. Model predictive control (MPC) is a type of advanced control method that can deal with a multi-input multi-output nonlinear system. Compared to the tradition [...]

2256 15189

Open Access Research Article

Synthetical Optimal Design for Passive-Damped LCL Filters in Islanded AC Microgrid

Received: 19 May 2021;  Published: 08 July 2021;  doi: 10.21926/jept.2103032

Abstract

In AC microgrid systems, technical issues resulting from the power control effect are the power control method efficiency and the filter resonance since voltage-frequency interference and filtering resonance may cause significant control input reduction and oscillation. A simple and robust solution is to regulate active power flow by adding an optimal passive damping resistor. The optimal LCL filter parameterization process in this paper provides an innovative approach to obtain the optimal quality factor and the o [...]

2110 15943

Open Access Original Research

Measurements of Overwater Gust Factor from Near Surface to Beyond Common Hub Height: A Case Study

Received: 13 December 2020;  Published: 06 July 2021;  doi: 10.21926/jept.2103031

Abstract

In September 2020 Hurricane Sally affected the north central Gulf of Mexico. Making use of the anemometers data available at 4 oil rigs over the affected region, it is found that, when the atmospheric stability was near-neutral, the gust factor (G) decreases linearly with height from approximately 1.28 at 35m above the sea surface to 1.18 at 160 m. In other words, G decreases linearly at the rate around 8% per 100 m from the typical hub height to beyond common hub height. Based on the linear equation found in this [...]

1514 8114

Open Access Original Research

Design and Implementation of a Laboratory Sucker Rod Pumping Unit Using Industry 4.0 Concepts

Received: 15 February 2021;  Published: 30 June 2021;  doi: 10.21926/jept.2102030

Abstract

The Industry 4.0 is here, and advanced technologies are widely available for domains such oil and gas which are traditionally slow in adopting extreme new technologies. This paper presents the design architecture and implementation of effective data acquisition (DAQ) and monitoring system applied to an experimental sucker rod pumping unit for both event occurrence and educational purpose using latest technological advancements and industry 4.0 principles. The designed framework allows control and monitoring of anal [...]

2737 14878

Open Access Research Article

Numerical Investigation of Pyrotechnical Initiators and Their Impact in Airbag Inflator Applications: Ballistic Modeling and Functional Analysis

Received: 02 April 2021;  Published: 28 June 2021;  doi: 10.21926/jept.2102026

Abstract

A numerical model describing the ballistic behavior of a commercially used initiator is presented in this article. This model was built on the principle of conservation of mass and energy in the multi-phase framework incorporated with multi-loaded conditions. After obtaining the information about the grain size distribution in each composite, a fixing factor was proposed based on the surface area ratio of the composites. Thus, the solid propellant burning process based on distributed grain size was described, and t [...]

2970 16682

Open Access Original Research

Automated Probabilistic Analysis and Parametric Modelling of the Seasonal-Diurnal Wind Vector

Received: 14 April 2021;  Published: 25 June 2021;  doi: 10.21926/jept.2102027

Abstract

A refined and extended version of the Offset Elliptical Normal mixture model has been developed to parameterise the seasonal diurnal wind vector automatically. Automated using R scripts, the method eliminates any potential risk of confirmation bias posed by the manual supervision in the original method. Refinements to the method include the latest algorithms for clustering of Gaussian mixtures, with Bayesian regularisation to set the number of components and to limit the predisposition to overfit. A new extension u [...]

1523 8778

Open Access Review

Dynamic Behavior of Li in Solid-State Li-Ion Batteries Studied using MeV Ion Beam Analysis Techniques

Received: 26 March 2021;  Published: 24 June 2021;  doi: 10.21926/jept.2102029

Abstract

In this review, various studies on the Li depth profiles of metal/electrolyte/metal capacitors and batteries of Au/LCO/LATP/Pt, LCO/LiPON/Si, and LMO/LiPON/NbO with different metal electrodes at both sides (by bias; LCO =LiCoO2, LATP =Li3.1Al0.86Ti1.14Ge1.27P1.73O12, LMO =LiMn2O4, NbO = Nb2O5) using the in-situ reflection ERD (ERD) technique with 9MeV O+4 ion beam and transmission ERD (TERD) technique with 5MeV He+2 ion beam, respectively, are described. For capacitors, the transport fraction of Li-ion in the elect [...]

1732 9266

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