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Simulations of Photovoltaic Systems on Different Types of Ships in Sweden: Solar Energy Generation, Comparison to Energy Consumption, and Reduction of CO2 Emission 瑞典不同类型船舶上光伏系统的模拟:太阳能发电,能源消耗的比较,以及二氧化碳排放的减少
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2025-12-18 DOI: 10.1002/ese3.70413
Joachim Wallenstein, Joanne Ellis, Erik M. J. Johansson
{"title":"Simulations of Photovoltaic Systems on Different Types of Ships in Sweden: Solar Energy Generation, Comparison to Energy Consumption, and Reduction of CO2 Emission","authors":"Joachim Wallenstein,&nbsp;Joanne Ellis,&nbsp;Erik M. J. Johansson","doi":"10.1002/ese3.70413","DOIUrl":"10.1002/ese3.70413","url":null,"abstract":"<p>Today, ships are largely powered by fossil fuels, and it is therefore important to find new ways to power ships due to the negative environmental effects that the emissions from the fossil fuels give rise to. In this work, we have investigated the potential of using solar cells on different types of ships, to see how it reduces energy consumption and emissions of carbon dioxide (CO<sub>2</sub>). The simulated values for the solar energy have been compared with the ships’ energy consumption to estimate how much the emissions from the ships could be reduced with on-board solar energy installations. From the reduction in fuel consumption, we have also estimated the fuel cost reductions and an approximate payback time for the solar cell system. We have also made practical measurements of solar radiation in a marine environment, and specifically investigated how light reflections against the water surface can contribute to the energy. How light and flexible thin-film roof-top solar cells would cope with the marine environment was also investigated. The results suggest that solar cells can be an important complement in shipping to reduce fuel consumption and emissions of CO<sub>2</sub>.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1273-1285"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70413","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566546","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}
引用次数: 0
Study on the Law of Multi-Fracture Propagation in Different Fracturing Fluid Viscosity 不同压裂液黏度下多裂缝扩展规律研究
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2026-01-06 DOI: 10.1002/ese3.70420
Zhixing Zhang, Xiang Fu, Yuedong Liu, Xiaoqiang Zhang, Yulong Jiang
{"title":"Study on the Law of Multi-Fracture Propagation in Different Fracturing Fluid Viscosity","authors":"Zhixing Zhang,&nbsp;Xiang Fu,&nbsp;Yuedong Liu,&nbsp;Xiaoqiang Zhang,&nbsp;Yulong Jiang","doi":"10.1002/ese3.70420","DOIUrl":"10.1002/ese3.70420","url":null,"abstract":"<p>Using the TCHFSM-I large-scale accurate triaxial fracturing seepage simulation device independently developed, acoustic emission monitoring system and high-temperature–high-pressure dynamic flowmeter, the fracturing multi-fracture synchronous propagation law of different viscosity fracturing fluids was studied with homogeneous cement mortar specimens as the object. The results show that (1) fracturing fluid's viscosity significantly affects the synchronous propagation of multiple fractures, especially when the perforation distance is small. Decreasing the viscosity of the fracturing fluid can reduce the effect of stress shadow and make the multi-fracture propagation more balanced. (2) Under different fracturing fluid viscosity conditions, the evolution characteristics of injection pressure are significantly different. Reducing the viscosity of the fracturing fluid can reduce the initiation pressure, but the initiation time becomes longer to a certain extent. (3) The fracturing process can be divided into three stages: supplementary filtration, energy accumulation-failure, and energy remnant. Each stage's acoustic emission event location map can well reflect the fracture propagation law. In the fracturing operation, the viscosity of the fracturing fluid can be reduced appropriately, and the fracturing effect can be improved.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1339-1352"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70420","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147563613","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}
引用次数: 0
High-Fidelity Simulation-Driven Control Framework for Robust Grid Integration of Renewable Energy Systems 可再生能源系统鲁棒并网的高保真仿真驱动控制框架
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2025-12-19 DOI: 10.1002/ese3.70414
Wulfran Fendzi Mbasso, Ambe Harrison, Idriss Dagal, Pradeep Jangir, Zhe Liu, Aseel Smerat
{"title":"High-Fidelity Simulation-Driven Control Framework for Robust Grid Integration of Renewable Energy Systems","authors":"Wulfran Fendzi Mbasso,&nbsp;Ambe Harrison,&nbsp;Idriss Dagal,&nbsp;Pradeep Jangir,&nbsp;Zhe Liu,&nbsp;Aseel Smerat","doi":"10.1002/ese3.70414","DOIUrl":"10.1002/ese3.70414","url":null,"abstract":"<p>The reliable integration of intermittent renewable energy sources into modern power grids requires control solutions that balance dynamic performance, power quality and implementation complexity. This paper presents a <b>modular, simulation-driven control framework</b> for grid-connected hybrid photovoltaic–wind systems. The framework organises conventional PI-based loops in a hierarchical structure with power, DC-link voltage and dq-current layers, and augments them with a <b>mode-switching decision-logic module</b> capable of transitioning between passive (load-following) and active (grid-support) operation in real time. Implemented entirely in MATLAB/Simulink, the framework includes automated disturbance emulation and a script-based benchmarking workflow that allows fair comparison between the proposed Simulation-Driven Hierarchical Mode-Switching Control (SDHMC) and reference PI, MPC, SMC and FLC controllers under identical plant and scenario settings. For the studied hybrid PV–wind case, SDHMC reduces settling time by about 58% and lowers current THD by around 53% compared to a conventional PI design, while maintaining DC-link voltage deviations within ± 1.2% during severe grid-voltage sags. The contribution is thus a <b>reusable high-fidelity simulation benchmark and control architecture</b> at converter level; experimental and hardware-in-the-loop validation are identified as essential next steps.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1286-1299"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567199","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}
引用次数: 0
Assessment of Voltage Unbalance and Power Losses in Distribution Network Integrated With PVs and EV Charging Stations 光伏与电动汽车混合充电站配电网电压不平衡与功率损耗评估
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2025-12-22 DOI: 10.1002/ese3.70401
Maaz Ahmad, Aamir Nawaz, Rahmat Ullah, Ehtasham Mustafa, Abdelfatah Ali
{"title":"Assessment of Voltage Unbalance and Power Losses in Distribution Network Integrated With PVs and EV Charging Stations","authors":"Maaz Ahmad,&nbsp;Aamir Nawaz,&nbsp;Rahmat Ullah,&nbsp;Ehtasham Mustafa,&nbsp;Abdelfatah Ali","doi":"10.1002/ese3.70401","DOIUrl":"10.1002/ese3.70401","url":null,"abstract":"<p>Unequal load distribution in three-phase power distribution networks leads to voltage unbalance and decreased network efficiency. Integration of photovoltaics (PVs) and electric vehicle charging stations (EVCSs) into such networks is a challenging task as their penetration affects the power quality of the system. Considering the varying load demand and PV generation alongside the stochastic nature of electric vehicles (EVs), this study presents a technique for the precise placement of the PV system and EVCS inside the unbalanced networks to enhance the performance of the system. The optimal placement of PVs and EVCSs is carried out by considering real Pakistani 60-bus unbalanced radial distribution systems (URDS), whereas to minimize the voltage unbalanced factor (VUF) and active power loss (APL), a metaheuristic technique, improved grey wolf optimization (IGWO) was used. Six different case studies of the integration of PVs and EVCSs inside the system are considered in this work. The simulation results demonstrate that the integration of the single-phase PVs and EVCSs resulted in an increase of APL by 18.04% and VUF by 21.78%. However, the APL and VUF decreased by 14.82% and 3.96%, respectively, for the three-phase integration of the same size of PVs and EVCSs. Hence, the integration of three-phase PVs and EVCSs enhanced the system performance in comparison to the single-phase integration.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1131-1147"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70401","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568074","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}
引用次数: 0
Off-Grid Solar Systems: An Experimental Work and Systematic Techno-Economic Analysis 离网太阳能系统:实验工作与系统技术经济分析
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2025-12-22 DOI: 10.1002/ese3.70418
MD Shouquat Hossain, YuHao Liu, DingXi Xiang, Jing Liu, S. M. Rezaul Karim, Laveet Kumar, Zafar Said, Mohammad A. Alim
{"title":"Off-Grid Solar Systems: An Experimental Work and Systematic Techno-Economic Analysis","authors":"MD Shouquat Hossain,&nbsp;YuHao Liu,&nbsp;DingXi Xiang,&nbsp;Jing Liu,&nbsp;S. M. Rezaul Karim,&nbsp;Laveet Kumar,&nbsp;Zafar Said,&nbsp;Mohammad A. Alim","doi":"10.1002/ese3.70418","DOIUrl":"10.1002/ese3.70418","url":null,"abstract":"<p>This study presents an integrated experimental and techno-economic analysis of off-grid solar photovoltaic (PV) systems. A custom data-logging platform, developed using an ATmega328P microcontroller, was employed to monitor the performance of two 100 W mono-crystalline PV modules under real outdoor conditions in Zhenjiang, China, from April to August 2023. The logger continuously recorded voltage, current, solar radiation, and temperature with 20-second resolution, enabling evaluation of operational behavior. Results revealed a strong positive correlation between solar radiation and power output, while higher cell temperatures led to a notable decrease in efficiency. The maximum peak power of 69.55 W and 74.51 W was achieved on 11 July 2023, with the highest efficiencies of 14.65% and 15.98% observed on 15 June 2023. Economic assessments using net present value (NPV) and levelized cost of energy (LCOE) methods showed that a simple DC configuration remains cost-competitive with the grid (LCOE ≈ ¥0.38/kWh). However, its payback period exceeds 10 years. Conversely, the AC system, which required an inverter, was economically non-viable under current market conditions. These findings highlight the importance of minimalist design and provide a validated dataset for optimizing low-cost off-grid PV applications in similar climate zones.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1300-1321"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70418","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567853","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}
引用次数: 0
Synthesis of Carboxylic Cellulose Nanocrystals From Yellow Thatching Grass (Hyparrhenia filipendula) via Citric Acid Hydrolysis 柠檬酸水解法制备黄茅草羧基纤维素纳米晶
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2025-12-29 DOI: 10.1002/ese3.70419
Fildah Ayaa, Michael Lubwama, Samuel Ayodele Iwarere, Michael Olawale Daramola, John Baptist Kirabira
{"title":"Synthesis of Carboxylic Cellulose Nanocrystals From Yellow Thatching Grass (Hyparrhenia filipendula) via Citric Acid Hydrolysis","authors":"Fildah Ayaa,&nbsp;Michael Lubwama,&nbsp;Samuel Ayodele Iwarere,&nbsp;Michael Olawale Daramola,&nbsp;John Baptist Kirabira","doi":"10.1002/ese3.70419","DOIUrl":"10.1002/ese3.70419","url":null,"abstract":"<p>Grass is an abundant and renewable source of cellulose, which makes it a sustainable and cost-effective source for producing cellulose nanocrystals. Moreover, the extraction of cellulose nanocrystals from grass provides a value-added product from an otherwise low-value agricultural waste material, which can contribute to the development of a circular economy. In this study, cellulose nanocrystals (CNCs) were extracted from <i>Hyparrhenia filipendula</i> via citric acid hydrolysis. The <i>Hyparrhenia filipendula</i> stems were pre-processed through mechanical size reduction and Soxhlet extraction. The extractive-free stems were fractionated using two solvents: 10 wt% (w/v) sodium hydroxide (NaOH) and deep eutectic solvent of ethylene glycol:citric acid (1:2 molar ratio). The fractionated samples were bleached with acidified sodium chlorite and hydrolyzed with 80 wt% citric acid for 4 h at 120°C in a Parr reactor. The samples obtained at each treatment stage were characterized using standard scientific procedures for chemical composition, morphology, elemental composition, crystallinity, and thermal stability. The results show that CNCs were successfully extracted from <i>Hyparrhenia filipendula</i> via citric acid hydrolysis. The surface morphology of alkali fractionated CNCs was needle-like, whereas the surface morphology of DES fractionated CNCs was rod-like. The alkali fractionated and hydrolyzed sample, NaCNC, had the highest cellulose purity (91%), as well as the highest thermal stability. The FTIR analysis proved the removal of non-cellulosic components in the CNCs, except for the unbleached CNCs that had significant quantities of hemicellulose and lignin. The XRD analysis revealed the presence of characteristic cellulose Iβ in the CNCs, with the UNNaCNC sample (NaOH fractionated, unbleached, acid hydrolyzed sample) having the highest crystallinity index of 81% and the largest crystallite size of 4.20 nm. The properties of the CNCs obtained in this study are comparable to CNCs derived from previously reported lignocellulosic materials. The CNCs from <i>Hyparrhenia filipendula</i> therefore have a wide range of potential applications.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1322-1338"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70419","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570322","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}
引用次数: 0
Comprehensive Feasibility Study of Solar Power Plants 太阳能发电厂综合可行性研究
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2025-12-24 DOI: 10.1002/ese3.70407
Seyyed Mohammad Hadi Mohammadi, Saeed Safari, Reza Abbasi
{"title":"Comprehensive Feasibility Study of Solar Power Plants","authors":"Seyyed Mohammad Hadi Mohammadi,&nbsp;Saeed Safari,&nbsp;Reza Abbasi","doi":"10.1002/ese3.70407","DOIUrl":"10.1002/ese3.70407","url":null,"abstract":"<p>The global transition to solar energy is frequently impeded by high project failure rates, largely due to feasibility assessments that emphasize geographic and economic aspects while overlooking critical technical, environmental, and socio-administrative dimensions. This imbalance presents both scientific and industrial challenges, resulting in incomplete evaluations and increased investment risks. To address this gap, this study introduces a comprehensive framework for assessing the feasibility of solar power plants. For the first time, all relevant indicators were systematically identified through an extensive literature review and expert consultations, then organized into six categories: geographic, financial, economic, technical, environmental, and socio-administrative. A hybrid Multi-Attribute Decision-Making (MADM) approach, combining expert surveys with the Analytical Hierarchy Process (AHP), was applied to prioritize these indicators. The results revealed that geographical, economic-financial, technical, environmental, social, and administrative factors are the main influencing factors in this field, respectively. By aggregating weighted scores, a Composite Feasibility Index (CFI) was developed, serving as a clear go/no-go benchmark. The practical application of this framework can effectively demonstrate the extent to which investing in the establishment of a solar power plant at a specific location is rational and justifiable. This study provides practitioners and investors with a standardized, quantifiable tool for preliminary project evaluation, substantially reducing risk. For policymakers, it offers a validated checklist to streamline regulatory approvals and foster sustainable solar energy development.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1213-1225"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70407","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568630","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}
引用次数: 0
The Impact of Carbon Pricing Mechanisms on Regional Power Sector Emissions: Evidence From Guangdong, China 碳定价机制对区域电力行业排放的影响:来自广东的证据
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2026-02-09 DOI: 10.1002/ese3.70470
Caixia Yang, Yao Xiao, Tao Chen, Erqun Zhao, Mingze Lei, Supannika Wattana, Buncha Wattana
{"title":"The Impact of Carbon Pricing Mechanisms on Regional Power Sector Emissions: Evidence From Guangdong, China","authors":"Caixia Yang,&nbsp;Yao Xiao,&nbsp;Tao Chen,&nbsp;Erqun Zhao,&nbsp;Mingze Lei,&nbsp;Supannika Wattana,&nbsp;Buncha Wattana","doi":"10.1002/ese3.70470","DOIUrl":"10.1002/ese3.70470","url":null,"abstract":"<p>This study investigates low-carbon transition pathways and carbon neutrality planning in Guangdong Province, China's largest energy consumer. Using integrated regression analysis, electricity demand is projected to increase from 850 TWh in 2023 to 1580 TWh by 2060. A coupled LEAP-NEMO modeling framework assesses the impacts of key policies including carbon pricing, renewable energy expansion, and energy storage deployment. Five scenarios are evaluated: Baseline (BAS), Renewable Energy Promotion (REP), High Carbon Price (HCP), Advanced Storage Technology Breakthrough (ASP), and Comprehensive Policy Mix (COM). Results show that single policies reduce emissions but are insufficient for carbon neutrality. The ASP and COM scenarios, combining multiple technologies and policies, achieve substantial decarbonization. Under the COM scenario, carbon emissions decline by 93% relative to the baseline, reaching 47.6 Mt by 2060, with renewables accounting for 88% of generation and coal power phased out under strict carbon pricing. Economic analysis reveals that despite higher initial investments, the COM scenario lowers long-term operational costs by approximately 12% compared to the baseline, demonstrating the economic benefits of policy synergy. Based on Guangdong's energy profile and policy outcomes, key recommendations include developing differentiated carbon market mechanisms to align carbon and electricity prices, enhancing cross-regional energy coordination within the Guangdong-Hong Kong-Macao Greater Bay Area, and optimizing energy storage deployment to support high renewable integration.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1113-1130"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70470","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564254","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}
引用次数: 0
Enhancing Energy Efficiency and Reducing Emissions in the Textile Industry of Bangladesh: A Pathway to Sustainability 提高孟加拉国纺织工业的能源效率和减少排放:一条通往可持续发展的道路
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2025-12-18 DOI: 10.1002/ese3.70403
Mohammad Ahsan Habib, M. Hasanuzzaman, Mohammed Moinul Islam, Muhammad Robiul Alam Robi, Hayat Mahamud Sabbir
{"title":"Enhancing Energy Efficiency and Reducing Emissions in the Textile Industry of Bangladesh: A Pathway to Sustainability","authors":"Mohammad Ahsan Habib,&nbsp;M. Hasanuzzaman,&nbsp;Mohammed Moinul Islam,&nbsp;Muhammad Robiul Alam Robi,&nbsp;Hayat Mahamud Sabbir","doi":"10.1002/ese3.70403","DOIUrl":"10.1002/ese3.70403","url":null,"abstract":"<p>The rapidly growing textile and apparel sector, a key contributor to Bangladesh's economy, faces increasing energy demands and environmental challenges, highlighting the need for comprehensive assessments to support SDG 7 and SDG 9. A detailed energy assessment to categorize the energy using apparatus and breakdown energy consumption has been led at a textile industry in Bangladesh. As electric motors are the primary energy-consuming equipment, various strategies for energy savings and emission reduction have been evaluated for the industry. It is found that by using variable speed drive (VSD), around 4708 MWh, 14124 MWh, 23540 MWh, 32956 MWh, 43313 MWh, and 51788 MWh of energy can be saved for speed reduction of 10%, 20%, 30%, 40%, 50%, and 60%, respectively. Around 2599 MWh, 1950 MWh, and 1751 MWh of energy is possible to save by using high-efficiency motors (HEM) for motor loadings of 50%, 75%, and 100%, correspondingly. After analyzing the payback period, HEM is more effective than VSD. However, in the case of higher rated motors, both HEM and VSD show a close payback period. Moreover, by using both the HEM and VSD, a huge amount of harmful emission gases can be reduced, wherein CO<sub>2</sub> is the major amount.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1148-1168"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70403","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566544","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}
引用次数: 0
Computational Analysis of Spray Angle Effects on Combustion and Emissions in Methane-Diesel Dual-Fuel Engine 喷角对甲烷-柴油双燃料发动机燃烧与排放影响的计算分析
IF 3.4 3区 工程技术
Energy Science & Engineering Pub Date : 2026-03-11 Epub Date: 2025-12-29 DOI: 10.1002/ese3.70427
Abdullah Al Rifat, Md. Arafat Rahman, Md. Mizanur Rahman, Tafsirul Hassan, Md Nazmul Haque
{"title":"Computational Analysis of Spray Angle Effects on Combustion and Emissions in Methane-Diesel Dual-Fuel Engine","authors":"Abdullah Al Rifat,&nbsp;Md. Arafat Rahman,&nbsp;Md. Mizanur Rahman,&nbsp;Tafsirul Hassan,&nbsp;Md Nazmul Haque","doi":"10.1002/ese3.70427","DOIUrl":"10.1002/ese3.70427","url":null,"abstract":"<p>A diesel methane dual fuel engine appears as a potential means for lowering emissions while retaining useful thermal efficiency. Ansys Forte 2023 R1 CFD software was employed to analyze the combustion parameters, performance attributes, and emissions characteristics of a methane-diesel dual-fuel engine at various spray angles of 100°, 105°, 110°, 115°, and 120°. Simulation is performed under 0.44 MPa load, 50% methane energy share, and −7° after TDC start of injection. Methane is injected into the intake manifold for premixing with air. Peak cylinder pressure increased as the spray angle (SA) raised to 110°. Thereafter, it slightly decreased to 120° SA. Lower combustion duration is obtained at 14.98° at 110° SA. The maximum thermal efficiency was found to be 32.04% with a low indicated specific fuel consumption of 289.43 g/kWh at 105° SA. Comparative performance is obtained from 110° SA. UHC and VOC is found to be minimum in 100° and 105° SA; thereafter, Unburned Hydrocarbons (UHC) and Volatile organic compounds (VOCs) increase rapidly. NO<sub>X</sub> emission trends first increased up to 110° SA and then decreased. Higher CO emissions were observed at 100° SA and then decreased with increasing spray angle up to 110°; however, CO emissions increased slightly. Fuel vapor mass fraction and temperature contours ensured low diffusion burning for 115° and 120° SA, resulting in unmixed remaining unburned methane and a sharp increase in UHC emissions. O and OH radical formation is hindered for converting by CO<sub>2</sub> from CO at 120° SA due to quenching. The optimal spray angle was determined as 110°, which provided an excellent balance of efficient burning, consistent pressure progression, and acceptable emissions.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"14 3","pages":"1100-1112"},"PeriodicalIF":3.4,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70427","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570330","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}
引用次数: 0
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