Energy Science & Engineering最新文献

{"title":"Analysis of a Novel Brushless Doubly Fed Reluctance Generator Based Wind Energy Conversion System","authors":"Subir Datta,&nbsp;John Lalsanglien,&nbsp;Subhasish Deb,&nbsp;Robert Singh,&nbsp;C. Rohmingtlunga,&nbsp;Md. Minarul Islam,&nbsp;Taha Selim Ustun","doi":"10.1002/ese3.70408","DOIUrl":"10.1002/ese3.70408","url":null,"abstract":"<p>This paper presents a grid connected Brushless Doubly-Fed Reluctance Generator (BDFRG) based wind energy conversion system. It offers a reliable and cost-effective solution since its brushless and cage-less rotor structure eliminates the need for slip rings, reducing maintenance costs, improving efficiency, robust in nature, and more reliable than other wind turbine generators. The BDFRG has two separate windings which are mounted on the stator namely the power winding and control winding: power winding connects to grid whereas the control winding connects to grids via partially-rated back-to-back converter. This partially-rated converter comprises of dual separately converters namely Grid Side converter (GSC) and Machine Side Converter (MSC). A field-oriented vector control scheme is proposed for MSC to Variable Speed Constant Frequency (VSCF) action at fluctuating velocity of wind and a grid voltage-oriented vector control scheme is considered for GSC to maintain constant voltage across DC-link capacitor and also to obtain unity power factor of the system by managing no reactive power drift between grid and GSC. Maximum power point tracker (MPPT) and blade pitch angle control technique are also incorporated with the control structure of the MSC to obtain full power from the variable wind velocity and limit the winds generated power at its desired rate when the wind speed exceeds its rated value. The study system is modeled mathematically and implemented in MATLAB/Simulink (2021a) environment to observe the efficacy of the proposed control schemes under rated, below rated and above rated wind velocity. The hardware set-up is developed for the study system and both control schemes are successfully executed in the Field-Programmable Gate Array (FPGA) platform for experimental set-up. Results show the efficacy of the proposed scheme and also provide good responses by showing reduced oscillation during transient, also it offers minimal steady-state error in response to variations in input sources.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1226-1240"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70408","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568087","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 Gas-Liquid Separation Characteristics Inside a Drainage Self-Priming Pump Under Different Discharge Valve Openings","authors":"Yu-Liang Zhang,&nbsp;Hui-Fan Huang,&nbsp;Jin-Fu Li,&nbsp;Xiao-Mei Guo","doi":"10.1002/ese3.70410","DOIUrl":"10.1002/ese3.70410","url":null,"abstract":"<p>To investigate the influence of discharge valve opening on the self-priming characteristics of a self-priming pump, numerical calculations are conducted for four different discharge valve openings (valve opening coefficient <i>k</i>_d = 0.3, 0.333, 0.667, 1.0, corresponding to rated, slightly open, medium open, and fully open states) based on a circulation piping system, through which the hydraulic performance and internal flow characteristics during the self-priming process are obtained. The results show that discharge valve opening primarily affects the accelerated exhaust phase of the self-priming pump, with an increase in discharge valve opening reducing the self-priming time—specifically, the self-priming time is shortened from 10.76 s (<i>k</i>_d = 0.3) to 4.6 s (<i>k</i>_d = 1.0), it was shortened by 57.3%. The rise rate of the liquid level in the vertical section of the inlet pipe is unaffected by valve opening changes, as all four valve openings result in a 42 mm rise in the liquid level within 0.2 s. While the direction of the two-phase flow at the reflux hole changes with valve opening variations, the flow velocity increases with larger valve openings—for instance, the liquid mass flow rate at the reflux hole reaches a minimum of −15.77 kg/s (leakage from volute to separation chamber) when <i>k</i>_d = 0.3 and a maximum of 1.47 kg/s (reflux from separation chamber to volute) when <i>k</i>_d = 1.0. These results provide a basis for adjusting discharge valve opening to optimize the self-priming performance of self-priming pumps in practical applications.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1241-1257"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70410","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565926","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":"Research on Precise Identification of Rock Strength Based on Bolt Drilling Parameters","authors":"Qiang Zhu,&nbsp;Sheng Biao Wang,&nbsp;Da Jiang Wen,&nbsp;Chong-Yu Song,&nbsp;Kang Zhou","doi":"10.1002/ese3.70421","DOIUrl":"10.1002/ese3.70421","url":null,"abstract":"<p>During roadway excavation, the presence of weak interlayers and fractured rock masses significantly affects roof stability. To achieve timely and effective roadway support, it is crucial to identify and predict different rock types based on drilling signals from roof bolters. This study combines theoretical analysis, laboratory tests, and numerical simulation to investigate the intrinsic relationship between drilling signals and rock properties. A hybrid denoising method called “Grey Wolf Optimizer-Variational Mode Decomposition-Wavelet Threshold Denoising (GWO-VMD-WTD)” is proposed, along with a lithology identification model based on an SSA-BP neural network. The results demonstrate that: rotational speed, torque, thrust, and vibration acceleration show significant correlations with rock properties; the GWO-VMD-WTD method effectively restores authentic signals with notable noise reduction; the SSA-BP neural network model, trained using time-domain and frequency-domain feature parameters, exhibits strong generalization capability, robustness, and reliability, achieving 95.8333% accuracy in rock classification. This provides critical references for real-time monitoring and control of roof deterioration zones.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1353-1371"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70421","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570347","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":"Prediction of Energy Consumption and Energy Savings in an Urban Vertical Farm Benchmark","authors":"Simeng Xie,&nbsp;Pedro Martinez-Vazquez,&nbsp;Charalampos Baniotopoulos","doi":"10.1002/ese3.70415","DOIUrl":"10.1002/ese3.70415","url":null,"abstract":"<p>Vertical farms and three-dimensional cultivation are vital ways to address the water-energy-food eco-system that can combat global hunger, poverty and malnutrition while ensuring the production of sustainable and healthy agricultural products. Vertical farms in cities can effectively reduce transport and packaging costs and avoid waste, however, plans for the introduction of vertical farms into the city are on hold due to the high energy requirements for their operation and maintenance. This study introduces a benchmark farming building that integrates production, warehousing, transport, sales and office, to operate in Birmingham, UK. The simulation results derived from this study were generated with EnergyPlus and yielded a total average annual energy consumption of 160.86 kWh/m² for the entire building. The analysis breakdown shows that the HVAC system and lighting consume 52% and 28% of the total energy supply, respectively. Based on these results and aiming at maximizing efficiency, we recommend improvements on shading systems, façade elements, and lighting, in addition to the use of technology for wind energy harvesting. The optimized model shows that such improvements raise the energy efficiency in about 20%, on a yearly basis.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1086-1099"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70415","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567854","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":"Failure Mechanism of Asymmetric Large Deformations Under Repeated Mining in Roadways","authors":"Ai-Rong Wang,&nbsp;Tao Peng,&nbsp;Kang Zhou,&nbsp;Chong-Yu Song","doi":"10.1002/ese3.70406","DOIUrl":"10.1002/ese3.70406","url":null,"abstract":"<p>To address the challenge of controlling severe asymmetrical deformation in roadways subjected to repeated mining, this study (i.e., based on the engineering context of the Buertai Coal Mine) investigated the characteristics of the regional stress field in the surrounding rock and the evolution laws of the plastic zone under such stress conditions using vector-based analysis. The research revealed the asymmetrical failure characteristics of these roadways and proposed a flexible support strategy employing high-elongation anchor cables to mitigate fracture risks in severely deformed zones. Industrial-scale field trials were conducted to validate the proposed method. The key results are summarized as follows: (1) Based on the roadway conditions in the repeatedly mined sections of Buertai Coal Mine, the study identified the deformation and failure patterns of the surrounding rock. Under repeated mining impacts, the roadways experienced pronounced asymmetrical deformations, characterized by persistent rib spalling, floor heave, and frequent anchor cable fractures—significantly increasing roadway instability; (2) Numerical simulations were employed to analyze the stress field distribution and its evolution, identifying the development patterns of the plastic zone in the surrounding rock across different service phases. This clarified the mechanism behind the observed non-uniform, large-scale deformation; (3) A flexible support technology was designed and tested on-site, utilizing flexible anchor cables capable of withstanding substantial deformations without fracturing. Field test results confirmed that these cables provide continuous support resistance, effectively maintaining the stability and integrity of the surrounding rock.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1195-1212"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70406","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570320","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":"Combined Effect of Cetane Improver, Aluminum Oxide Nanoparticles, and Waste Cooking Oil Biodiesel Blend on a Dual Fuel Combustion Engine Run With Biogas Originated From Food Waste","authors":"Kapura Tudu,&nbsp;Debabrata Barik,&nbsp;Sreejesh S. R. Chandran,&nbsp;Prabhu Paramasivam,&nbsp;Nanak Ram,&nbsp;Abinet Gosaye Ayanie","doi":"10.1002/ese3.70422","DOIUrl":"10.1002/ese3.70422","url":null,"abstract":"<p>This study investigates the use of biogas generated from anaerobic co-digestion of food waste and vinasse. Engine behavior in dual fuel mode was examined when biogas was supplied alongside waste cooking oil biodiesel (WCB100) serving as the pilot fuel, with diethyl ether (DEE), n-butanol, and aluminum oxide (Al₂O₃) nanoparticles. Engine was operated at biogas flow rates of 4, 8, and 12 lpm in dual fuel, and the outcomes were compared with those from conventional diesel and neat WCB100. At 8 lpm, the additive-enriched WCB blend delivered the highest performance, achieving a brake thermal efficiency of 36% and lowering brake-specific fuel consumption by 30.6% relative to diesel. Emission measurements indicated notable reductions in unburned hydrocarbons and carbon monoxide, though higher levels of carbon dioxide and nitrogen oxides appeared at greater biogas flow rates. These results highlight the potential of combining vinasse-derived biogas with improved biodiesel blends to enhance dual-fuel engine efficiency while reducing major pollutants, supporting sustainable waste-to-energy strategies.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1372-1386"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70422","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568353","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":"Waves of Uncertainty: Crude Oil Under Geopolitical, Economic, and ESG Turbulence","authors":"Sana Braiek,&nbsp;Naif Alsagr,&nbsp;Aamir Aijaz Syed,&nbsp;Ahmed Jeribi","doi":"10.1002/ese3.70412","DOIUrl":"10.1002/ese3.70412","url":null,"abstract":"<p>This study employs a dual-methodology framework combining time-varying copula analysis and wavelet coherence to examine the multiscale dependence between crude oil benchmarks (WTI and Brent) and three uncertainty indicators: Geopolitical Risk (GPR), Economic Policy Uncertainty (EPU), and ESG Uncertainty (ESGUI) from 2003 to 2025. Our results reveal a sharp divergence in market reactions: oil prices respond to geopolitical and economic policy shocks with immediate intensity, while reacting to ESG uncertainty through gradual, long-term repricing. Dynamic copula results demonstrate WTI's more transient, crisis-sensitive dependence, heavily influenced by domestic factors. Conversely, Brent exhibits more persistent and structurally stable linkages, particularly to global economic demand shocks, consistent with its international benchmark status. Wavelet coherence analysis provides critical frequency-domain insights, confirming the 2015 Paris Agreement as a catalytic event for ESG integration. Post-agreement, a significant low-frequency, anti-phase relationship emerged where rising ESG uncertainty leads to declining oil returns a structural shift confirming the pricing of “transition risk”. These findings underscore the increasing importance of integrating geopolitical, economic, and sustainability-linked uncertainties into oil market forecasting and energy risk management strategies.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1258-1272"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70412","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566545","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":"Optimization and Assessment of Parabolic Trough Solar Power Plants in Arid Climates: A Case Study in Tunisia","authors":"Anissa Ghomrassi,&nbsp;Monia Chaabane,&nbsp;Hatem Mhiri","doi":"10.1002/ese3.70405","DOIUrl":"10.1002/ese3.70405","url":null,"abstract":"<p>This study aims to model a solar power plant (SPP) utilizing parabolic trough collectors (PTC) to fulfill the electricity needs in an arid zone of the southern of Tunisia. The research integrates both experimental and numerical approaches. A prototype of a PTC was first constructed and experimentally tested under arid climates. Subsequently, a numerical study was carried out using the Transient Systems Simulation (TRNSYS) software to assess its annual performance. The comparison reveals a good agreement between the TRNSYS-modeled PTC system and the experimental data. The study further examines the power plant's performance under several operating scenarios. These evaluations aim to verify reliable operation and the ability to satisfy the chosen site's energy requirements. The solar field was optimized to cover 65,000 m², producing an annual energy output of 4.52 GWh, which is sufficient to supply the electrical needs of a delegation in Tunisia called Hazoua. Different combinations of energy sources are studied. Results show that the hybrid solution, comprising 60% solar energy and 40% gas backup, demonstrates technical advantages with a system efficiency of 22%. The optimization scenario is also reinforced by an economic study. In fact, the Levelized Cost of Electricity (LCOE) of the power plant is of 0.1815 USD/kWh and the Payback Period (PP) is 4 years and 7 months, which indicates its strong competitiveness compared to transmission costs. Likewise, the environmental aspect is taken into account and the suggested hybrid strategy has the potential to reduce annually by about 925,000 kg CO₂ emissions. This work can guide decision-making for utilities and policymakers for rural electrification in arid regions aiming to implement efficient and reliable renewable energy solutions in such zones.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1180-1194"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565927","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":"Thermal Energy Storage Improvement in a Tube-in-Tube Heat Exchanger With Innovative Design of Extra-Fins Configurations","authors":"Behnam Ataeiyan","doi":"10.1002/ese3.70404","DOIUrl":"10.1002/ese3.70404","url":null,"abstract":"<p>Energy and the environment are essential issues worldwide. Sustainable design of energy systems plays a key role in enhancing thermal efficiency and reducing environmental emissions. This study uses COMSOL Multiphysics 6.2 to investigate the impact of 12 extra fin configurations on the thermal effectiveness of a tube-in-tube heat exchanger with annular fins used as a thermal energy storage system. This system is a tube-in-tube heat exchanger with a total height of 400 mm and a 44 mm diameter. Paraffin RT-35 is used as a storage medium. The objective of this study is to determine the optimal configuration that minimizes material consumption in the production of fins while simultaneously enhancing the energy storage efficiency of the energy storage unit. The findings indicate that the majority of the proposed scenarios in this study demonstrate a significant effect on both the charging (melting) and discharging (solidification) duration. The optimal configuration improved the melting stage temperature by 3.95%, reduced full melting time by 33.88%, and decreased solidification time by 1.31%. Taking into account the energy implications and material efficiency, the novel design of this thermal energy storage system significantly demonstrates a reduction in material consumption and melting duration by 16.67% and 10.88%, respectively. In conclusion, adopting the proposed design approach enhances the thermal efficiency and sustainability of the energy systems.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1169-1179"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70404","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565935","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":"Neural Network Models for Solar Irradiance Forecasting in Polluted Areas: A Comparative Study","authors":"Mujtaba Ali,&nbsp;Muhammad Yaqoob Javed,&nbsp;Aamer Bilal Asghar,&nbsp;Khurram Hashmi,&nbsp;Abbas Javed,&nbsp;Basem Alamri,&nbsp;Krzysztof Ejsmont","doi":"10.1002/ese3.70393","DOIUrl":"10.1002/ese3.70393","url":null,"abstract":"<p>Increasing global energy demand and renewable energy expansion have heightened the importance of accurate solar irradiance forecasting for effective grid management and capacity planning. Atmospheric pollution significantly affects solar irradiance measurements, requiring air quality integration for precise forecasting in polluted urban environments. This study develops a comprehensive multi-city data set spanning eight geographically diverse locations with systematically categorized pollution levels, from pristine environments (Copenhagen, Sydney) to heavily polluted urban centers (Beijing, New Delhi, Lahore). A pollution-aware neural network training methodology is introduced, representing the first systematic investigation of ensemble model performance across explicitly categorized atmospheric quality levels. The study presents a novel ensemble architecture integrating multi-layer perceptrons, recurrent neural networks, and nonlinear autoregressive with exogenous inputs, specifically designed for forecasting under varying atmospheric pollution conditions. The proposed ensemble model achieves superior performance with <i>R</i>² of 0.8702, RMSE of 1.0809, and MAE of 0.8137, consistently outperforming individual models across all pollution categories and geographical locations. Validation using the HI-SEAS data set confirms superiority over three contemporary state-of-the-art methodologies. The framework incorporates SHapley Additive exPlanations (SHAP) analysis for model interpretability and comprehensive cross-validation procedures. This study establishes a foundational framework for pollution-aware solar forecasting, addressing critical gaps regarding atmospheric variability's impact on prediction accuracy.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 2","pages":"935-961"},"PeriodicalIF":3.4,"publicationDate":"2026-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70393","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146256348","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}