Sustainable Energy Technologies and Assessments最新文献_第2页

On-sun performance and stability of graphene nanofluids in concentrating direct absorption solar collectors 石墨烯纳米流体在聚光直接吸收太阳能集热器中的光能性能和稳定性

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-09 DOI: 10.1016/j.seta.2025.104605

Miguel Sainz-Manas , Alexis Vossier , Roger Garcia , Cyril Caliot , Françoise Bataille , Gilles Flamant

{"title":"On-sun performance and stability of graphene nanofluids in concentrating direct absorption solar collectors","authors":"Miguel Sainz-Manas , Alexis Vossier , Roger Garcia , Cyril Caliot , Françoise Bataille , Gilles Flamant","doi":"10.1016/j.seta.2025.104605","DOIUrl":"10.1016/j.seta.2025.104605","url":null,"abstract":"<div><div>The Performances of direct absorption solar collectors (DASC) are limited by the stability of the nanofluid’s optical properties. This study investigates the performance and long-term stability of a graphene-based nanofluid under real on-sun operating conditions using an experimental parabolic trough pilot. The on-sun experiments were complemented with a detailed off-sun experimental evaluation of the nanofluid stability with temperature. Experimental results show that while the nanofluid optical properties remained stable over long periods (over two and a half months) and across varying temperatures (up to 80 °C) in a controlled environment, exposure to actual operational conditions in a parabolic trough collector working in closed loop caused significant degradation of optical properties, particularly due to pH changes due to corrosion in the collector hydraulic circuit. Despite this, overall photo-thermal conversion efficiencies of 62.3 ± 0.6 % and 74.3 ± 0.8 % were achieved with graphene concentrations of 0.2 and 0.3 g/L respectively, a substantial improvement over the 24.5 ± 0.5 % achieved using demineralized water. These findings highlight the critical role of material compatibility in hydraulic systems with graphene/water nanofluids to minimize corrosion, maintain particle stability and preserve collector performance in practical applications.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104605"},"PeriodicalIF":7.0,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal and sustainable siting of offshore wind farms in Greece: Environmental considerations, cost analysis, and comparative evaluation of state-proposed development areas 希腊海上风电场的最佳和可持续选址：环境考虑、成本分析和国家提议的开发区域的比较评估

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-09 DOI: 10.1016/j.seta.2025.104586

Christina Tsiara, Vanessa Katsardi, George Spiliotopoulos, Lampros Vasiliades

{"title":"Optimal and sustainable siting of offshore wind farms in Greece: Environmental considerations, cost analysis, and comparative evaluation of state-proposed development areas","authors":"Christina Tsiara, Vanessa Katsardi, George Spiliotopoulos, Lampros Vasiliades","doi":"10.1016/j.seta.2025.104586","DOIUrl":"10.1016/j.seta.2025.104586","url":null,"abstract":"<div><div>This study addresses the critical need for sustainable offshore wind farm (OWF) siting in Greece by developing a comprehensive GIS-based methodology that balances environmental considerations with economic viability. The study identifies optimal OWF locations by applying exclusion criteria (e.g., NATURA2000 Network) and evaluating dynamic, site-specific parameters. A subsequent cost analysis of eligible sites was conducted calculating Life-cycle Cost (<span><math><mrow><mi>L</mi><mi>C</mi><mi>S</mi></mrow></math></span>) and Levelized Cost of Energy (<span><math><mrow><mi>L</mi><mi>C</mi><mi>O</mi><mi>E</mi></mrow></math></span>) indices tailored for floating wind turbines; verified as the most suitable technology for Greece’s deep waters. Three scenarios with varying turbine nominal power (42 × 5 MW, 21 × 10 MW, 14 × 15 MW) and fixed total 210 MW capacity were analyzed. Key findings indicate that the Aegean Sea can achieve highly competitive <span><math><mrow><mi>L</mi><mi>C</mi><mi>O</mi><mi>E</mi></mrow></math></span> values as low as €60/MWh. The use of larger turbines reduced the <span><math><mrow><mi>L</mi><mi>C</mi><mi>O</mi><mi>E</mi></mrow></math></span> by approximately 41%. A critical comparative review of the state-proposed development areas revealed significant alignment in 14 out of the 25 plots; however, serious concerns were identified for the others due to conflicts with environmental and socio-cultural criteria. This work provides a novel framework for OWF strategic planning and a critical evaluation of Greece’s national plan, offering policymakers a vital tool to balance energy goals with environmental imperatives and advance the blue economy sustainably.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104586"},"PeriodicalIF":7.0,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A vehicle-to-grid enabled bidirectional multilevel converter for renewable energy-integrated electric vehicle charging system 一种用于可再生能源集成电动汽车充电系统的车对网双向多电平变换器

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-09 DOI: 10.1016/j.seta.2025.104634

Malle Lingamaiah , Arvind Mittal , Shailendra Kumar

{"title":"A vehicle-to-grid enabled bidirectional multilevel converter for renewable energy-integrated electric vehicle charging system","authors":"Malle Lingamaiah , Arvind Mittal , Shailendra Kumar","doi":"10.1016/j.seta.2025.104634","DOIUrl":"10.1016/j.seta.2025.104634","url":null,"abstract":"<div><div>The continuous reduction in photovoltaic (PV) module costs and rapid advancements in Electric Vehicle (EV) technology have driven the integration of solar energy into EV charging infrastructure. In India, bidirectional EV charging infrastructure is still emerging, with existing systems predominantly based on unidirectional or two-level converter topologies. A clear research gap exists in adopting multilevel bidirectional converter configuration for enhanced power flow control and renewable energy integration. This work proposes a V2G (Vehicle-to-Grid) 5-Level Bidirectional Multilevel Converter (5L-BMC) to enable efficient operation across G2V (Grid-to-Vehicle), V2G, and PV-to-Grid modes. The proposed system is developed in MATLAB/Simulink and validated through real-time experimentation using the OPAL-RT test bench. The results reveal high power conversion efficiency with a peak of 97.1 % during G2V and 96.7 % in V2G operations. Furthermore, the proposed system exhibits excellent power quality, achieving a low grid current Total Harmonic Distortion (THD) of 0.9 % in V2G mode and maintaining stable DC bus voltage regulation. These results confirm the suitability of the proposed topology for reliable, grid compliant and high performance EV charging applications in renewable energy-integrated smart grids.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104634"},"PeriodicalIF":7.0,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on fermentation and economic analysis of enzyme-alkali synergistic pretreatment of stover under high solid-phase densification conditions 高固相密度条件下秸秆酶碱协同预处理发酵及经济分析研究

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-09 DOI: 10.1016/j.seta.2025.104607

Mengran Gao , Zhi Wang , Mengying Liang , Lian Zhang , Zhengzhong Xu , Yafan Cai , Wei Zhuang , Dong Liu , Chenjie Zhu , Shilei Wang , Jingliang Xu , Hanjie Ying

{"title":"Research on fermentation and economic analysis of enzyme-alkali synergistic pretreatment of stover under high solid-phase densification conditions","authors":"Mengran Gao , Zhi Wang , Mengying Liang , Lian Zhang , Zhengzhong Xu , Yafan Cai , Wei Zhuang , Dong Liu , Chenjie Zhu , Shilei Wang , Jingliang Xu , Hanjie Ying","doi":"10.1016/j.seta.2025.104607","DOIUrl":"10.1016/j.seta.2025.104607","url":null,"abstract":"<div><div>The integrated lignocellulose usage throughout transit, storage, and pretreatment is inefficient. Therefore, the efficiency of biomass conversion to energy can be improved by performing the pretreatment process concurrently with the transit and storage of lignocellulose. However, the transportation and storage of corn stover in a densified form with low moisture content is detrimental to its pretreatment and enzymatic hydrolysis. Therefore, this work investigates the mechanism of enzyme-alkali synergism at high-solids loadings (0.5 g/g H<sub>2</sub>O) and low alkali concentration (0.02–2 g/100 g CS) conditions. The effects of high solids densification pretreatment compared to other pretreatments on the environment and economic costs were also investigated. The integrated physicochemical properties indicated that enzyme-alkali synergism was positively correlated with disrupted structure, increased crystallinity, and enhanced thermal-stability under high-solids loadings. The fermentation performance showed that the utilization rate of cellulose and hemicellulose in the pretreated stover reached 95.25 % and 46.88 %, respectively, and the conversion rate of ethanol and xylitol were 93.00 % and 29.19 %. This result provides a theoretical basis for the industrial application of high-solids enzymatic-alkaline synergistic pretreatment for more energy-efficient and sustainable development.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104607"},"PeriodicalIF":7.0,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the power quality of a grid-connected rooftop solar PV system under varying environmental conditions: Strategic optimization of influencing parameters using machine learning and desirability-driven approach 提高不同环境条件下并网屋顶太阳能光伏系统的电能质量：利用机器学习和可取性驱动方法对影响参数进行战略优化

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-04 DOI: 10.1016/j.seta.2025.104620

Ramesh Chandra Yadaw , Ashok Kumar Dewangan , Leeladhar Nagdeve , Ashok Kumar Yadav , Aqueel Ahmad

{"title":"Enhancing the power quality of a grid-connected rooftop solar PV system under varying environmental conditions: Strategic optimization of influencing parameters using machine learning and desirability-driven approach","authors":"Ramesh Chandra Yadaw , Ashok Kumar Dewangan , Leeladhar Nagdeve , Ashok Kumar Yadav , Aqueel Ahmad","doi":"10.1016/j.seta.2025.104620","DOIUrl":"10.1016/j.seta.2025.104620","url":null,"abstract":"<div><div>Power quality (PQ) is a critical concern in grid-connected solar PV systems, as non-linear inverter behavior and environmental variations introduce harmonics and reduce energy output. Most studies analyze PQ in isolation, with few addressing the combined effects of temperature, solar irradiance, and relative humidity using advanced predictive models. This study proposes a machine learning (ML) and Response Surface Methodology (RSM) framework for real-time prediction and optimization of PQ. Ten supervised ML regression models were trained on operational data from a 100 kWp grid-connected solar PV system (338 polycrystalline panels, 320 Wp each, 28.6833° N, 77.4500° E). Ambient temperature, solar irradiance, and relative humidity were used as inputs, while total harmonic distortion (THDi), power factor (PF), and apparent power (kVA) were measured as outputs. Model performance was evaluated using R<sup>2</sup> and RMSE. Random Forest achieved the highest accuracy with R<sup>2</sup> = 0.894 and RMSE = 5.87, outperforming traditional regressors. Optimization revealed optimal operating conditions at 948.79 W/m<sup>2</sup> irradiance, 37 °C temperature, and 36 % relative humidity, resulting in THDi of 7.9 %, PF of 0.995, and apparent power of 63.97 kVA, all compliant with IEEE Standard 519–2014. Compared to previous ANN and MLR-based approaches (R<sup>2</sup> ≈ 0.75–0.85), the proposed ML-RSM framework offers enhanced predictive performance and provides a practical tool for real-time PV system monitoring and control.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104620"},"PeriodicalIF":7.0,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of the pyrolysis processes, kinetics and products of end-of-life wind turbine blade base component blends (epoxy resin/glass fiber and thermoplastic polyurethane/carbon fiber) 报废风电叶片基组分共混物（环氧树脂/玻璃纤维和热塑性聚氨酯/碳纤维）热解过程、动力学和产物分析

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-03 DOI: 10.1016/j.seta.2025.104619

Lichao Ge , Qingyuan Yang , Hongcui Feng , Xi Li , Weixuan Zhang , Yanquan Liu , Huiwen Liu , Yang Wang , Chang Xu

{"title":"Analysis of the pyrolysis processes, kinetics and products of end-of-life wind turbine blade base component blends (epoxy resin/glass fiber and thermoplastic polyurethane/carbon fiber)","authors":"Lichao Ge , Qingyuan Yang , Hongcui Feng , Xi Li , Weixuan Zhang , Yanquan Liu , Huiwen Liu , Yang Wang , Chang Xu","doi":"10.1016/j.seta.2025.104619","DOIUrl":"10.1016/j.seta.2025.104619","url":null,"abstract":"<div><div>Wind turbine blade recycling is growing in scale annually, and pyrolysis is a good method for recycling. In this study, the pyrolysis behavior of two common physical powder blends of fiber-reinforced composites in wind turbine blades, epoxy resin/glass fiber (EP/GF) and thermoplastic polyurethane/carbon fiber (TPU/CF), was investigated via thermogravimetric analysis and kinetic analysis with different mixing ratios. The results demonstrated a certain synergistic effect between the fibers and the matrix, and an increase in the fiber proportion led to a greater increase in the pyrolysis activation energy of EP/GF (133.69‒188.94 kJ/mol) than that of TPU/CF (126.88‒141.35 kJ/mol). The isothermal pyrolysis products of these two blends were investigated via the tube furnace method; the pyrolysis gas products of the two blends were similar in type and mainly included carbon‒oxygen compounds, alkanes, olefins, and hydrogen. However, varying mixing ratios altered gas compositions and calorific values with EP/GF gases (13.86‒17.14 MJ/Nm<sup>3</sup>) peaked at 3:6; TPU/CF gases (6.99‒8.54 MJ/Nm<sup>3</sup>) peaked at 2:7. Scanning electron microscopy images of the pyrolyzed solid products demonstrated that the matrix on the recovered fibers of both blends was largely removed, and the increase in fiber proportion negatively affected the matrix removal of both blends.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104619"},"PeriodicalIF":7.0,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing surface performance for urban heat island mitigation using microsphere-based coatings 利用微球基涂料优化城市热岛缓解的表面性能

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-01 DOI: 10.1016/j.seta.2025.104601

S. Cavagnoli , C. Fabiani , C. Chiatti , A.L. Pisello

{"title":"Optimizing surface performance for urban heat island mitigation using microsphere-based coatings","authors":"S. Cavagnoli , C. Fabiani , C. Chiatti , A.L. Pisello","doi":"10.1016/j.seta.2025.104601","DOIUrl":"10.1016/j.seta.2025.104601","url":null,"abstract":"<div><div>Urban Heat Island is a detrimental overheating phenomenon that can be mitigated by using materials with tailored reflective emissive properties. This study develops innovative coatings for radiative cooling containing glass, ceramic, and chromed stainless-steel microspheres ranging from 10 to 50 μm, 150 to 250 μm, and 400 to 600 μm. Microspheres were applied on a pure aluminum layer, as well as on a black- and white-painted aluminum. Spectrophotometry and FTIR spectroscopy were employed to evaluate samples’ solar reflectance and thermal emittance, exploring the interplay between substrates and microspheres, and assessing how granulometry and material influenced the performance. In addition, surface temperature measurements were performed in a climatic chamber simulating summer and winter days to assess the coatings’ thermal behavior. Ceramic microspheres proved to be the most effective, exhibiting higher solar reflectance than the other materials. Although they caused a slight decrease in solar reflectance compared to aluminum and white references, they increased the UV reflectance by 20 % in white samples, and over 30 % in black samples in the entire spectrum analyzed. Moreover, ceramic microspheres also improved thermal emittance within the atmospheric window wavelengths (over 50 % for aluminum-based samples). Finally, climatic chamber simulations demonstrated that ceramic microspheres reduce surface temperatures if compared to samples without microspheres (up to 10 °C for black samples). In conclusion, these coatings represent an effective strategy to mitigate the Urban Heat Island through optimization and customization of surface performance.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104601"},"PeriodicalIF":7.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-mode energy harvester for transmission lines: integrating thermoelectric and triboelectric technology for self-powered vibration monitoring 输电线双模能量采集器：集成热电和摩擦电技术，用于自供电振动监测

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-09-30 DOI: 10.1016/j.seta.2025.104618

Yuncong Wang , Changxin Liu , Yi Wang , Zhenyao Ma , Kailin Lei , Peihan Huang , Jiaming Zhang , Yunchi Xie , Xun Zhou

{"title":"Dual-mode energy harvester for transmission lines: integrating thermoelectric and triboelectric technology for self-powered vibration monitoring","authors":"Yuncong Wang , Changxin Liu , Yi Wang , Zhenyao Ma , Kailin Lei , Peihan Huang , Jiaming Zhang , Yunchi Xie , Xun Zhou","doi":"10.1016/j.seta.2025.104618","DOIUrl":"10.1016/j.seta.2025.104618","url":null,"abstract":"<div><div>To ensure the reliable operation of transmission lines and address the long-term power supply challenges for distributed sensors, this study proposes a dual-mode energy harvester for transmission lines (DEH-TL) based on thermoelectric-triboelectric technology. The DEH-TL integrates multiple thermal energy harvesting modules (TEHMs) and uniformly distributed vibrational energy harvesting modules (VEHMs). The TEHM converts the temperature difference between the transmission lines and the environment into electrical energy through micro thermoelectric generator arrays, utilizing elastic connectors to adapt to surface variations across different conductor specifications and ensure efficient thermal contact. The VEHM incorporates a spring structure triboelectric nanogenerator coupled with a mechanical vibration amplifier, enabling omnidirectional broadband energy harvesting from transmission line vibrations. Under a temperature difference of 25 °C and a vibrational frequency of 15 Hz, the TEHM and VEHM achieve power outputs of 6.787 mW and 3.324 mW, respectively. The integrated energy management system efficiently regulates harvested energy, powering a wireless temperature-humidity sensor and enabling real-time data transmission via Bluetooth. Additionally, the DEH-TL achieves vibration frequency monitoring with 1.46 % maximum error. These results demonstrate the dual functionality of DEH-TL in energy harvesting and vibrational state sensing, addressing critical challenges in smart grid infrastructure.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104618"},"PeriodicalIF":7.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implementing IMO indices in warships: An in-depth case study in the Spanish Navy 在军舰上实施IMO指数：西班牙海军的深入案例研究

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-09-30 DOI: 10.1016/j.seta.2025.104604

Pedro Carrasco-Pena , María Álvarez Hernández , Alicia V. Carpentier , Gerardo González-Cela , Debora Cores , Rodrigo Mariño-Villar , Jorge Eiras-Barca

{"title":"Implementing IMO indices in warships: An in-depth case study in the Spanish Navy","authors":"Pedro Carrasco-Pena , María Álvarez Hernández , Alicia V. Carpentier , Gerardo González-Cela , Debora Cores , Rodrigo Mariño-Villar , Jorge Eiras-Barca","doi":"10.1016/j.seta.2025.104604","DOIUrl":"10.1016/j.seta.2025.104604","url":null,"abstract":"<div><div>Contemporary navies are increasingly committed to environmental stewardship, yet no study has quantified how warships measure up to civilian green-ship standards. This article is pioneering in its use of International Maritime Organization (IMO) indicators to quantify the energy efficiency of a fleet of warships. The IMO’s Energy Efficiency Existing Ship Index (EEXI) and Carbon Intensity Index (CII) have been adapted to 25 major Spanish Navy ships over a two-year period (Dec. 2019–Dec. 2021). These indices were originally designed for merchant vessels. A combination of fuel consumption data with displacement and speed-dependent consumption curves was utilized to reconstruct each vessel’s EEXI and annual CII under both typical and full-load scenarios. It is evident that none of the warships in question satisfied the IMO’s requisite EEXI. Indeed, the most antiquated gas-turbine frigates exceeded the EEXI limit by a factor of four and the CII threshold by up to ten. In contrast, naval tankers and transport ships exhibited the closest proximity to the prescribed values, with deviations within the range of 20%–30%. The findings (25 ships; 24 months; 4–10 overrun) indicate a significant efficiency disparity and establish a robust framework — combining IMO indices with customized consumption models — for benchmarking military fleets globally.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104604"},"PeriodicalIF":7.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Risk-averse distributionally robust operation coordination for hydrogen-integrated dynamic polygeneration hubs with multi-scale hybrid storebank 具有多尺度混合存储库的氢集成动态多发电枢纽的规避风险分布鲁棒运行协调

IF 7 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2025-09-30 DOI: 10.1016/j.seta.2025.104498

Tasawar Abbas , Sheng Chen , Jingtao Zhao , Shu Zheng

{"title":"Risk-averse distributionally robust operation coordination for hydrogen-integrated dynamic polygeneration hubs with multi-scale hybrid storebank","authors":"Tasawar Abbas , Sheng Chen , Jingtao Zhao , Shu Zheng","doi":"10.1016/j.seta.2025.104498","DOIUrl":"10.1016/j.seta.2025.104498","url":null,"abstract":"<div><div>Hydrogen-powered multi-scale storage systems enhance renewable energy utilization, accelerating the sustainable transition of power systems toward low-carbon operations. To advance this transition, a hydrogen-centric dynamic energy hub model is proposed, integrating producer, prosumer, and consumer hubs with hybrid storage to optimize economic and ecological outcomes under varying weekly weather conditions. The model enhances cost efficiency, environmental sustainability, carbon neutrality, and flexible energy distribution. Demand-side load fluctuations are corrected using a demand response framework, while an optimization approach informed by data-driven, distributionally robust methods mitigates renewable uncertainty with risk-averse dual-norm constrained scenarios. Piecewise linearization, adaptive Big M scenario reduction, and global SCIP solutions in GAMS simplify the complexity of fourth-order polynomial variables. The numerical results demonstrate a significant 4.69% and 18.31% reduction in wind and solar curtailment, 12.336% total model cost savings, and 14.13% emission reductions, ensuring optimal efficiency and sustainability for large-scale deployment in advancing global sustainable urbanization.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104498"},"PeriodicalIF":7.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0