International Journal of Energy Research最新文献

{"title":"Reliability Assessment of Wind Turbines Based on Failure Rate and Downtime Estimation","authors":"Musavir Hussain,&nbsp;Nayyar Hussain Mirjat,&nbsp;Faheemullah Shaikh,&nbsp;Lubna Luxmi Dhirani,&nbsp;Shoaib Ahmed Khatri,&nbsp;Laveet Kumar","doi":"10.1155/er/3424586","DOIUrl":"https://doi.org/10.1155/er/3424586","url":null,"abstract":"<p>This study undertakes an analysis of supervisory control and data accusation system (SCADA) alarm statistics to determine failure rate and downtime of wind turbine system (WTS). The underlying aim is to evaluate the performance and provide recommendations to improve the system’s reliability. The focus of this study is an onshore wind farm, located in Pakistan, with type-IV (permanent magnet direct drive) wind turbines (WTs) over the course of last 3 years of operations. The presented data can help to provide a better understanding of early life operations and performance, since all stoppages logged in the event record that caused the WTs not to generate electricity were considered in this study. This analysis was conducted for a complete wind farm for finding the most vulnerable/critical components. Data analytics identified that power converter and pitch system in wind farm emerged as leading contributors to failure rate and downtime across the years 2020, 2021, and 2022. This trend was evident both in the analysis of each year and in the cumulative data, highlighting these components as critical areas for improving the reliability and efficiency of WTs. The cumulative total failure frequency rate and downtime of the wind farm over the 3 years were found to be 449 and 2811 h, respectively. Results further emphasize that the pitch system and power converter are the most vulnerable/critical components based on their failure frequency and associated downtime, therefore, original equipment manufacturers should focus on these components to improve operating time and availability.</p>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/3424586","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144861768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Vigna mungo (L.) Hepper as Heterogeneous Catalyst for Generation of Biodiesel from a Mixture of Multiple Oil Feedstocks”","authors":"","doi":"10.1155/er/9845417","DOIUrl":"https://doi.org/10.1155/er/9845417","url":null,"abstract":"<p>S. Brahma, B. Basumatary, B. C. Mushahary, et al., “<i>Vigna mungo</i> (L.) Hepper as Heterogeneous Catalyst for Generation of Biodiesel from a Mixture of Multiple Oil Feedstocks,” <i>International Journal of Energy Research</i> 2024 (2024): 7407501, https://doi.org/10.1155/2024/7407501.</p><p>We apologize for this error.</p>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/9845417","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-Friendly Binders for High-Capacity Silicon Anodes and Sustainable Metal-Ion Batteries: A Focus on Water-Based and Bio-Based Alternatives","authors":"Junwoo Lee,&nbsp;Jiyoung Lee","doi":"10.1155/er/1324155","DOIUrl":"https://doi.org/10.1155/er/1324155","url":null,"abstract":"<p>The rapid growth of electric vehicles (EVs) and electronic devices has significantly increased the demand for high-performance and sustainable battery technologies. Among the key components of metal-ion batteries, including lithium-ion batteries (LIBs), binders play a crucial role in ensuring electrode stability and reliable performance. However, conventional binders, often derived from synthetic polymers and organic solvents, fall short of meeting the sustainability requirements for next-generation energy storage systems (ESSs). To address these challenges, eco-friendly binders have emerged as innovative solutions for advancing sustainable battery technologies. This review explores the evolution of eco-friendly binders, focusing on their dual role in enhancing battery performance and promoting environmental sustainability. Key design parameters for eco-friendly binders are discussed, alongside recent advancements in water-soluble binders that eliminate the need for hazardous solvents. Additionally, nature-derived binders sourced from renewable resources, such as plants, milk, seaweed, and corn are highlighted for their unique properties, benefits, and performance metrics. While prior reviews have provided valuable insights into the mechanical and/or chemical aspects of binder development, this work aims to complement those efforts by offering a broader perspective that incorporates sustainability-driven classification, solid-state compatibility, and high-mass-loading electrode applications. Challenges related to scalability and performance consistency are thoroughly analyzed, while future directions emphasize the development of biodegradable synthetic binders and their integration into next-generation batteries, including all-solid-state and wearable systems. Beyond improving battery performance, these eco-friendly and biodegradable binders have the potential to reduce the environmental impact of spent batteries. This review offers valuable insights into the development of sustainable binders and aims to inspire advancements that will revolutionize the battery industry, supporting a circular economy in energy storages.</p>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/1324155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144833226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultracompact Ball Vibrating Triboelectric Nanogenerator for Maximizing Instantaneous Power Output in Minimized Size","authors":"Seh-Hoon Chung,&nbsp;Minju Jee,&nbsp;Sujung Kang,&nbsp;Zong-Hong Lin,&nbsp;Youngho Jin,&nbsp;Sangmin Lee","doi":"10.1155/er/9259935","DOIUrl":"https://doi.org/10.1155/er/9259935","url":null,"abstract":"<p>The increased adoption of Internet of Things (IOT)-based portable devices has called attention to the need for high-output portable power supply. Portable electronics powered by batteries require additional processes, such as replacement or recharging, for continuous operation. Small-sized triboelectric nanogenerators (TENGs), which have been investigated for real-time power supply, are limited by low output owing to their small surface area and small surface charge. Therefore, a TENG device that can generate a high output for a real-time power supply is necessary. Herein, an ultracompact ball-vibrating TENG (UBV-TENG) is reported. With output enhancement owing to the electron avalanche effect, the UBV-TENG can generate an instantaneous peak power of up to 0.7126 W with a diameter of 5 mm and height of 20 mm. With comparing existing TENGs, the UBV-TENG generated more than 3 times higher instantaneous peak power with smaller device size. Owing to its small size and high performance, the optimized UBV-TENG can be easily utilized for portable human-motion energy-harvesting device, such as a self-powered safety light, as demonstrated by fabricating a 2 cm × 2 cm self-powered light emitting diode (LED) circuit that powers up to 120 LEDs with stacked structures.</p>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/9259935","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144833227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical Exfoliation of Spent Dry Cell Battery Electrodes and Green Reduction of Graphene Oxide Using Palm Oil Leaf Extract for Supercapacitor Application","authors":"Nor Azmira Salleh,&nbsp;Hasmaliza Mohamad,&nbsp;Noorashrina A. Hamid,&nbsp;Norariza Ahmad,&nbsp;Adil Alshoaibi,&nbsp;Soorathep Kheawhom,&nbsp;Ahmad Azmin Mohamad","doi":"10.1155/er/6692518","DOIUrl":"https://doi.org/10.1155/er/6692518","url":null,"abstract":"<div>\u0000 <p>This study presents a sustainable method for recycling zinc–carbon batteries by electrochemically exfoliating spent graphite electrodes to produce graphene oxide (GO), followed by green reduction with palm oil leaf extract to form reduced graphene oxide (rGO). GO sheets were exfoliated from graphite electrodes under varying applied potentials, and the palm oil leaf extract served as a green reducing agent for GO. The physical, morphological, and electrochemical properties of the rGO were characterized, revealing that exfoliation at 4.5 V yields high-quality GO. The resulting rGO outperformed GO in supercapacitor applications, demonstrating a significantly higher specific capacitance of 35.5 F g⁻¹ compared to GO’s 0.5 F g⁻¹. This eco-friendly approach not only enhances the electrical conductivity and stability of the recycled rGO but also contributes to sustainable material development for high-performance energy storage applications.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/6692518","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144811327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Future of Geothermal Wellbore Integrity: Geopolymer Cements for Enhanced Stability and Hydrogen Coproduction","authors":"Makungu M. Madirisha,&nbsp;Bolanle D. Ikotun","doi":"10.1155/er/6641119","DOIUrl":"https://doi.org/10.1155/er/6641119","url":null,"abstract":"<div>\u0000 <p>The transition to green hydrogen powered by geothermal systems requires robust wellbore materials capable of withstanding extreme conditions including temperatures exceeding 300°C, corrosive fluids, and thermal cycling. This review critically examines geopolymer cement, amorphous aluminosilicate binders, as high-performance alternatives to Portland cement (PC), which deteriorates at temperatures above 110°C and in saline environments. Geopolymers maintain compressive strengths greater than 50 MPa, exhibit carbon dioxide (CO₂) permeability as low as 2 × 10⁻²¹ m², and demonstrate promising thermal stability, chemical resistance, and self-healing (evidenced by permeability recovery from 9.48 to 2.76 <i>µ</i>D). These properties together suggest strong potential to mitigate fluid migration and thermal losses, which are critical factors for sustaining efficient geothermal hydrogen production. Their production also, emits up to 80% less CO₂ than PC, supporting low carbon infrastructure goals. A full-scale field trial in the Permian basin, a technically demanding hydrocarbon region, validated the operational feasibility of geopolymer slurry using conventional cementing equipment, achieving effective placement and zonal isolation. Although, conducted outside geothermal settings, this success supports the scalability and resilience of geopolymers under harsh subsurface conditions. This review highlights, geopolymer cement’s potential to ensure long term wellbore integrity, thermal efficiency, and sustainability in geothermal hydrogen production systems.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/6641119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144782386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the PEM Fuel Cell, PEMFC, Performance Under Variable Hydrogen Rates From the Seawater SWEL-V Electrolyzers","authors":"Moustafa Oraby,&nbsp;Shams Eldakar,&nbsp;Ann Maria Salib","doi":"10.1155/er/7045595","DOIUrl":"https://doi.org/10.1155/er/7045595","url":null,"abstract":"<div>\u0000 <p>The SWEL-V electrolyzer employs a nonmetallic, permeable, and porous rock electrode that produces green hydrogen directly from seawater with no corrosion (M. Oraby and A. Shawqi, International Journal of Energy Research [2024] 2024:5576626; M. Oraby, United States Patent, Publication No. 2024/04100062 A1). This paper investigates the performance of a PEM fuel cell operating with hydrogen produced by the SWEL-V electrolyzer with varying hydrogen flowrates. The fuel cell exhibited two distinct voltage plateaus where the locations and durations of these plateaus were strongly influenced by the hydrogen flowrates. An optimization function is developed to maximize and speed up the buildup of the fuel cell voltage through identifying the optimal hydrogen flowrate from the SWEL-V electrolyzer. These findings provide valuable insights for optimizing an integrated system combining seawater electrolysis and fuel cell technology.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/7045595","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RETRACTION: Research on Characteristics of Hydrogen Dynamic Leakage and Combustion at High Pressure","authors":"International Journal of Energy Research","doi":"10.1155/er/9859527","DOIUrl":"https://doi.org/10.1155/er/9859527","url":null,"abstract":"<p>RETRACTION: L. Guo, Q. Ba, and S. Zhang. “Research on Characteristics of Hydrogen Dynamic Leakage and Combustion at High Pressure.” <i>International Journal of Energy Research</i> 2023 (2023): 6644038, https://doi.org/10.1155/2023/6644038.</p><p>The above article, published online on 28 April 2023 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors; the journal Editor-in-Chief and John Wiley &amp; Sons Ltd. The retraction has been agreed due to concerns with accuracy of results and the experimental equipment. The authors explained that repeated experiments generated inconsistent results and further investigation identified that the experimental equipment used was not sufficiently accurate to generate reliable results.</p><p>The findings reported in this article are therefore considered unreliable.</p><p>The authors agree to the retraction.</p>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/9859527","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilization of Deep Learning Approach to Enhancing PEMFC Efficiency: Analyzing Humidity Variations Toward Sustainability","authors":"Asset M. Kabyshev,&nbsp;Kairat A. Kuterbekov,&nbsp;Kenzhebatyr Zh. Bekmyrza,&nbsp;Marzhan M. Kubenova,&nbsp;Aliya A. Baratova,&nbsp;Nursultan Aidarbekov,&nbsp;Bharosh Kumar Yadav","doi":"10.1155/er/1497630","DOIUrl":"https://doi.org/10.1155/er/1497630","url":null,"abstract":"<div>\u0000 <p>The performance of Proton Exchange Membrane Fuel Cells (PEMFCs) is highly dependent on operating conditions, particularly humidity levels, which significantly affect membrane hydration, ionic conductivity, and overall efficiency. While traditional approaches rely on laboratory experiments to study these effects, this research employs advanced deep learning techniques to model and predict PEMFC performance under varying humidity conditions. In this study, Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU) networks, along with attention mechanisms, are used to enhance predictive accuracy and capture complex nonlinear relationships. Numerical simulations conducted in ANSYS Fluent generate a dataset covering five humidity levels (20%, 40%, 60%, 80%, and 100%), which is used to train and validate the deep learning models. The findings indicate that moderate humidity (40%) yields optimal predictions, with the attention-based LSTM model achieving the highest accuracy (<i>R</i>² = 0.98, root mean squared error (RMSE) = 0.01). This study shows the potential of proposed models as efficient predictive tools for PEMFC optimization, providing a surrogate to costly and time-consuming experimental testing. The results also revealed that hydrogen consumption was minimized at 40% humidity, confirming that optimized humidification strategies contribute to both improved efficiency and reduced fuel demand toward sustainability.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/1497630","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144764111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Investigation of Heat Transfer and Pressure Drop in Partially Twisted Five-Lubed Tube With Al2O3 Nanofluid","authors":"Hamed Najafpoursani,&nbsp;Mohammad Reza Khoshravan Azar,&nbsp;Amir Najafpoursani,&nbsp;Seyed Morteza Javadpour","doi":"10.1155/er/6636155","DOIUrl":"https://doi.org/10.1155/er/6636155","url":null,"abstract":"<div>\u0000 <p>This study examines the heat transfer and pressure drop characteristics of water/aluminum oxide (Al₂O₃) nanofluid flow in a semi-twisted tube within solar collector systems. The investigation focuses on the influence of varying nanofluid concentrations and twisted tube lengths on thermal performance and friction factor. Numerical simulations employing the <i>k</i> − <i>ɛ</i> turbulence model incorporate solar radiation effects by modeling heat flux as a discrete, angular-dependent function. The upper half of the surface is subjected to direct solar radiation, implemented via a <i>C</i>-programed user-defined function (UDF) in Ansys Fluent to resolve wall flux dynamics. Additionally, the performance evaluation criterion (PEC) was employed to quantitatively assess system efficiency across different configurations. Notably, the highest PEC value was achieved at a twisted length of 700 mm, corresponding to 35% of the total tube length. The study demonstrates that increasing the number of twisted tube number of swirls (<i>N</i>) from 3 to 7 leads to a significant 17% improvement in the Nusselt number (Nu), outweighing the accompanying 12% increase in friction factor. The comparative analysis highlights that integrating a 4% nanoparticle concentration with a 7-twist tube configuration leads to a substantial boost in thermal performance, resulting in an approximate 80% increase in the Nu. This optimized setup offers strong potential for enhancing the efficiency of solar collectors.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/6636155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}