Energy Conversion and Management最新文献

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Proposal and analysis of an energy storage system integrated hydrogen energy storage and Carnot battery
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-14 DOI: 10.1016/j.enconman.2025.119734
Ju Guan , Wei Han , Qibin Liu , Fan Jiao , Wenjing Ma
{"title":"Proposal and analysis of an energy storage system integrated hydrogen energy storage and Carnot battery","authors":"Ju Guan ,&nbsp;Wei Han ,&nbsp;Qibin Liu ,&nbsp;Fan Jiao ,&nbsp;Wenjing Ma","doi":"10.1016/j.enconman.2025.119734","DOIUrl":"10.1016/j.enconman.2025.119734","url":null,"abstract":"<div><div>As renewable energy capacity continues to surge, the volatility and intermittency of its generation poses a mismatch between supply and demand when aligned with the fluctuating user load. Consequently, there’s a pressing need for the development of large-scale, high-efficiency, rapid-response, long-duration energy storage system. This study presents a novel integrated energy storage system combining hydrogen energy storage and Carnot battery. Carnot battery serves as the base load for stable, large-scale energy storage, while hydrogen energy storage (PEMEC and SOFC) serves as the regulated load to flexibly absorbs excess renewable electricity and responds promptly to user demand. The integrated system also effectively leverages high-temperature waste from the SOFC to boost Carnot battery’s round-trip efficiency (RTE), enhancing overall system RTE. Energy and exergy analyses are conducted for both the proposed system and a reference system. Results indicate that the proposed system achieves an overall RTE of 57.48% and an RTE of 71.98% for the Carnot Battery, improvements of 5.71% and 11.32%, respectively, compared to the reference system. The mechanisms underlying the efficiency improvements are analyzed, and the impact of capacity allocation between hydrogen storage and the Carnot battery on overall system performance is explored.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119734"},"PeriodicalIF":9.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Boosting electrical efficiency in hybrid energy harvesters by scavenging ambient thermal and mechanical energy
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-14 DOI: 10.1016/j.enconman.2025.119739
Arun Mondal, Amish Kumar Gautam, Neeraj Khare
{"title":"Boosting electrical efficiency in hybrid energy harvesters by scavenging ambient thermal and mechanical energy","authors":"Arun Mondal,&nbsp;Amish Kumar Gautam,&nbsp;Neeraj Khare","doi":"10.1016/j.enconman.2025.119739","DOIUrl":"10.1016/j.enconman.2025.119739","url":null,"abstract":"<div><div>The generation of electricity by hybrid energy harvesting devices would be a desirable approach to improve power efficiencies due to their ability to utilize multiple energy sources simultaneously. However, to achieve the improved efficiency from the hybrid device, the power outputs of two individual devices need to be comparable. Here, a single hybrid device has been fabricated, which combines triboelectric nanogenerator (TENG) and thermoelectric generator (TEG) and is capable of harvesting both thermal and mechanical energy, simultaneously. The TEG part of the hybrid device generates a maximum power density of ∼ 35 μW/cm<sup>2</sup> at a ΔT of ∼ 12.5 K, whereas the TENG part of the hybrid device also separately generated a maximum power density of ∼ 32 μW/cm<sup>2</sup>. The comparable power density of the thermoelectric and triboelectric devices makes the hybrid device more efficient. The output power density of the individual TENG and TEG devices shows significantly higher performances as compared to the outputs reported in previous works. The individual performances of the TENG and TEGs further simulated using COMSOL MULTIPHYSICS 5.5 and compared with the experimental results. The hybrid device charged the capacitor (1 μF, 63 V) up to a voltage of 13 V at a rate of 163 mV/sec in 80 sec, which is about 37 % and 2067 % higher as compared to the individual performance of the TENG and TEG, respectively. The practical application of the hybrid device is demonstrated by powering a digital calculator. Thus, the use of a present hybrid device having a comparable individual power density can be used to harness the ambient energy.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119739"},"PeriodicalIF":9.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 molten salt-mediated biomass gasification process for high-yield hydrogen production with in situ carbon capture: experiments, simulation and ANN prediction
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-14 DOI: 10.1016/j.enconman.2025.119735
Aoyang Zhang , Dongfang Li , Xing Zhu , Gyeong-min Kim , Yijie Zeng , Chung-hwan Jeon , Hua Wang , Tao Zhu , Guirong Bao
{"title":"A molten salt-mediated biomass gasification process for high-yield hydrogen production with in situ carbon capture: experiments, simulation and ANN prediction","authors":"Aoyang Zhang ,&nbsp;Dongfang Li ,&nbsp;Xing Zhu ,&nbsp;Gyeong-min Kim ,&nbsp;Yijie Zeng ,&nbsp;Chung-hwan Jeon ,&nbsp;Hua Wang ,&nbsp;Tao Zhu ,&nbsp;Guirong Bao","doi":"10.1016/j.enconman.2025.119735","DOIUrl":"10.1016/j.enconman.2025.119735","url":null,"abstract":"<div><div>Biomass gasification is a promising technology for green hydrogen production. In this study, a molten salt-mediated biomass gasification process with in situ carbon capture for hydrogen-rich syngas production is proposed and analyzed via experiments, process simulation and ANN modeling. The process utilizes molten salts as a solar energy carrier, with the entire system’s heat requirements fulfilled through solar energy, thereby increasing the gas yield per unit biomass. CaO is added to the process to facilitate in situ CO<sub>2</sub> capture and enhance the WGS reaction, enabling simultaneous CO<sub>2</sub> sequestration and increased hydrogen production in the syngas. Key operational parameters such as temperature, calcium-to-carbon (Ca/C) molar ratio, and steam-to-carbon (S/C) molar ratio are experimentally investigated. Results indicate a hydrogen composition of 68.67 vol% at 600 °C, with optimal Ca/C and S/C ratios of 1:1.5 and 1:1, respectively. A quasi-steady-state model developed in Aspen Plus is verified with experimental data, and a full loop model identifies an optimal molten salt-to-biomass (M/B) mass ratio of 2.40. Additionally, an artificial neural network was employed to predict the relationship between key operational parameters and hydrogen yield. The best-performing model, ANN12, achieved a high coefficient of determination (R<sup>2</sup> = 0.99587). This process allows for simultaneous hydrogen production and carbon capture, offering an efficient method for green hydrogen generation with negative carbon emissions.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119735"},"PeriodicalIF":9.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Exploring microalgae species for integrated bioenergy Production: A Multi-Fuel cascade valorisation approach
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-14 DOI: 10.1016/j.enconman.2025.119736
Joana Oliveira , Sara Pardilhó , Emanuel Costa , José C. Pires , Joana Maia Dias
{"title":"Exploring microalgae species for integrated bioenergy Production: A Multi-Fuel cascade valorisation approach","authors":"Joana Oliveira ,&nbsp;Sara Pardilhó ,&nbsp;Emanuel Costa ,&nbsp;José C. Pires ,&nbsp;Joana Maia Dias","doi":"10.1016/j.enconman.2025.119736","DOIUrl":"10.1016/j.enconman.2025.119736","url":null,"abstract":"<div><div>The present study aims to evaluate the cascade valorisation of microalgae for bioenergy production after defining the most promising species between <em>Aurantiochytrium</em> sp., <em>Scenedesmus obliquus</em>, <em>Nannochloropsis oceanica</em>, and <em>Nannochloropsis</em> sp.. For selection, biodiesel (after hexane lipid extraction coupled with cell-disruption methods) and bioethanol (after acid hydrolysis) were produced from raw biomass. <em>Aurantiochytrium</em> sp. achieved the highest oil and FAME contents (21 ± 1 wt% and 58.9 ± 0.6 wt%, respectively), as well as the highest bioethanol concentration (5.4 ± 0.3 g/L). The integrated production of biodiesel, bioethanol and biogas led to a decrease in bioethanol and biogas production efficiency compared to raw biomass (around 30 % and 60 %, respectively). However, it allows multiple product outputs, potentially improving economic and environmental outcomes. The current study highlights the potential of using microalgae species such as <em>Aurantiochytrium</em> sp. for bioenergy production, in a zero-waste approach.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119736"},"PeriodicalIF":9.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Benchmarking reinforcement learning and prototyping development of floating solar power system: Experimental study and LSTM modeling combined with brown-bear optimization algorithm
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-14 DOI: 10.1016/j.enconman.2025.119696
Mohamed E. Zayed , Shafiqur Rehman , Ibrahim A. Elgendy , Ali Al-Shaikhi , Mohamed A. Mohandes , Kashif Irshad , A.S. Abdelrazik , Mohamed Azad Alam
{"title":"Benchmarking reinforcement learning and prototyping development of floating solar power system: Experimental study and LSTM modeling combined with brown-bear optimization algorithm","authors":"Mohamed E. Zayed ,&nbsp;Shafiqur Rehman ,&nbsp;Ibrahim A. Elgendy ,&nbsp;Ali Al-Shaikhi ,&nbsp;Mohamed A. Mohandes ,&nbsp;Kashif Irshad ,&nbsp;A.S. Abdelrazik ,&nbsp;Mohamed Azad Alam","doi":"10.1016/j.enconman.2025.119696","DOIUrl":"10.1016/j.enconman.2025.119696","url":null,"abstract":"<div><div>This study conducts comprehensive comparative experimental investigation, performance assessment analysis, and enhanced artificial intelligence (AI) modeling of solar floating photovoltaic (SFPV) and ground-mounted solar PV (GSPV) systems. Both systems—SFPV and GSPV—are installed, tested, and compared under identical harsh environmental conditions in Bahrain’s Gulf, in Al-Khobar, Saudi Arabia, with a detailed assessment of electric power output, PV panel surface temperature, PV DC voltage, and current, as well as energy yield and efficiency. More so, a hybrid artificial intelligence framework integrating Light Gradient-Boosting Machine (LightGBM), Gated Recurrent Unit (GRU) and Long Short-Term Memory (LSTM) models, fine-tuned through the utilization of an innovative Brown Bear Optimization Algorithm (BBOA) are also developed to forecast electrical power generation and PV panel surface temperature for both SFPV and GSPV systems. The experiments indicate that the SFPV system improved the average PV electrical power and accumulated net daily electrical energy by 59.25% and 69.70%, as well as reduced the PV panel surface temperature by 32.36% compared to that of the SGPV system, respectively. Moreover, statistical evaluations highlighted the LSTM-BBOA model achieved superior robustness over the investigated AI models (LGBM-BBOA, GRU, LSTM, LGBM) in performance prediction, evidenced by the maximal determination coefficient (R<sup>2</sup>) of 0.9998 and 0.9999, and the minimal RMSE values of 0.5031 and 0.0007 for predicting the SFPV’s electric power and module surface panel temperature, respectively. Conclusively, the study provides valuable insights into the benchmarking of AI techniques for improving smart-grid integration and operational efficiency of floating solar installations, aligning with the innovation objectives of sustainable energy development.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119696"},"PeriodicalIF":9.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 review of co-generative and synergistic desalination & refrigeration systems for sustainable development applications
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-14 DOI: 10.1016/j.enconman.2025.119717
Gayatri Sundar Rajan , Seda Zeynep Keleş , Christian D. Peters , Binjian Nie , Hiba Bensalah , Nicholas P. Hankins
{"title":"A review of co-generative and synergistic desalination & refrigeration systems for sustainable development applications","authors":"Gayatri Sundar Rajan ,&nbsp;Seda Zeynep Keleş ,&nbsp;Christian D. Peters ,&nbsp;Binjian Nie ,&nbsp;Hiba Bensalah ,&nbsp;Nicholas P. Hankins","doi":"10.1016/j.enconman.2025.119717","DOIUrl":"10.1016/j.enconman.2025.119717","url":null,"abstract":"<div><div>Within the water-energy-food nexus, desalination and refrigeration cogeneration systems are able to address pressing sustainable development goals. Such systems exploit the synergy between the two processes to yield mutual benefits. This review evaluates existing cogeneration studies to recommend promising research directions for sustainable development applications such as simultaneous freshwater production and cold storage refrigeration. Compared to recent reviews of combined desalination and cooling systems, the novelty of this review is in its focus on refrigeration temperatures suitable for fresh food storage (between 0–15 °C), differentiating hybrid systems as Integrated or Coupled, and highlighting the potential technical and economic synergies between refrigeration and desalination systems for sustainable development applications. The key aspects examined included (1) capacity of desalination and refrigeration, (2) source of water and potential contaminants, (3) system design and synergies, (4) efficiency of energy and material resources, and (5) integration with renewable energy sources. The primary synergy in integrated systems was the simultaneous low-temperature evaporation of water and chilling of a cooling fluid. In coupled systems, the synergy comes from the usage of waste heat from refrigeration systems to drive thermal desalination processes. Regarding performance, the systems with the highest water recovery rates and thermal desalination efficiencies are hybrid multiple effect distillation systems. Promising directions for future research include experimentally validating numerically derived inferences, achieving deeper heat integration to improve system efficiency, and developing passive measures such as indirect evaporative cooling for simultaneous dehumidification, cooling, and water production.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119717"},"PeriodicalIF":9.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Built-in metallic partitions in solar chimney: Structural design and thermo-hydraulic performance analysis
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-14 DOI: 10.1016/j.enconman.2025.119718
Jing Nie, Jinchen Xu, Tongzheng Guo, Jiawei Wang, Jing Jia, Hong Gao
{"title":"Built-in metallic partitions in solar chimney: Structural design and thermo-hydraulic performance analysis","authors":"Jing Nie,&nbsp;Jinchen Xu,&nbsp;Tongzheng Guo,&nbsp;Jiawei Wang,&nbsp;Jing Jia,&nbsp;Hong Gao","doi":"10.1016/j.enconman.2025.119718","DOIUrl":"10.1016/j.enconman.2025.119718","url":null,"abstract":"<div><div>This study introduces a solar chimney design incorporating built-in metallic partitions to enhance convective heat transfer between fluids and solids. Based on the Manzanares prototype, numerical simulations were conducted to analyze the effects of solar radiation intensity, turbine pressure drop, and ambient temperature on flow fields and thermo-hydraulic performance. A response surface methodology was employed to develop an output power prediction model. Results indicate that metallic partitions significantly improve thermal efficiency, with relative increase rates of 9.28 % in power output and 21.61 % in collector efficiency compared to the prototype at specific operating conditions, and achieving a maximum output power of 89.607 kW under specific conditions (SR = 1000 W/m<sup>2</sup>, ΔP = 140 Pa, ambient temperature = 308 K). The system demonstrates robust operation under low radiation and high ΔP conditions. Cost-effective strategies, such as aluminum-steel composite structures and honeycomb perforated designs integrated with modular manufacturing, are proposed to reduce material costs while maintaining high heat transfer efficiency. This approach eliminates the need for large-scale ground modifications, preserves structural simplicity, and offers a novel solution for efficient, low-cost deployment in large-scale solar chimney power plants.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119718"},"PeriodicalIF":9.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 virtual calibration technology for multi objective operating parameters of thermal management system based on thermodynamic indicators
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-14 DOI: 10.1016/j.enconman.2025.119712
Haoyuan Chen , Kunfeng Liang , Chunyan Gao , Yunpeng Zhang , Xun Zhou , Bin Chen , Chenguang Zhang , Haolei Duan , Shuopeng Li
{"title":"Research on virtual calibration technology for multi objective operating parameters of thermal management system based on thermodynamic indicators","authors":"Haoyuan Chen ,&nbsp;Kunfeng Liang ,&nbsp;Chunyan Gao ,&nbsp;Yunpeng Zhang ,&nbsp;Xun Zhou ,&nbsp;Bin Chen ,&nbsp;Chenguang Zhang ,&nbsp;Haolei Duan ,&nbsp;Shuopeng Li","doi":"10.1016/j.enconman.2025.119712","DOIUrl":"10.1016/j.enconman.2025.119712","url":null,"abstract":"<div><div>With the rapid development of battery electric vehicle, technical problems still exist, and an efficient and reliable thermal management system is a core challenge to improve vehicle performance.This study proposes a multi-mode directly-cooling thermal management system to meet temperature control requirements while optimizing energy efficiency, cost, and environmental impact. An experimental and simulation platform for the system was established as the data source, and a thermodynamic analysis architecture including three indicators was developed to evaluate the impact of different operating parameters on system performance using experimental data. The results show that a 5 °C increase in the system evaporation temperature reduced total energy loss by approximately 12.6 % and environmental impact by 4.65 %, while increasing costs by about 12 % in both modes, system has a set of optimal operating parameters under different operating modes. Under the guidance of thermodynamic analysis, three thermodynamic indicators and key operating parameters were optimized as objective functions and decision variables. The Non-dominated sorting genetic algorithm was applied to develop a multi-objective virtual calibration technology for system parameters, leading to an 18.2 % increase in exergy efficiency across both modes, along with reductions of 11.1 % in total cost rate and 30.9 % in environmental impact rate. Based on the AMESim platform, virtual calibration of optimized parameters demonstrates that the proposed scheme ensures temperature control performance while significantly improves energy efficiency, and reduces economic and environmental impacts, showing strong application potential.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119712"},"PeriodicalIF":9.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Aerodynamics prediction of vertical-axis wind turbines based on meta learning under regional interactions
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-13 DOI: 10.1016/j.enconman.2025.119727
Rui Zhang , Lingyu Zhan , Redili Yushan , Yaoran Chen , Limin Kuang , Yu Tu , Zhaolong Han , Dai Zhou
{"title":"Aerodynamics prediction of vertical-axis wind turbines based on meta learning under regional interactions","authors":"Rui Zhang ,&nbsp;Lingyu Zhan ,&nbsp;Redili Yushan ,&nbsp;Yaoran Chen ,&nbsp;Limin Kuang ,&nbsp;Yu Tu ,&nbsp;Zhaolong Han ,&nbsp;Dai Zhou","doi":"10.1016/j.enconman.2025.119727","DOIUrl":"10.1016/j.enconman.2025.119727","url":null,"abstract":"<div><div>Due to the difficulty in balancing efficiency and accuracy using traditional methods, an increasing number of deep learning models are being used to study the aerodynamic parameters of vertical-axis wind turbines. Nevertheless, interactions between the upwind and downwind regions of vertical-axis wind turbines were often ignored in this process, resulting in inaccurate outcomes. In a meta learning framework, this study proposes a novel deep learning model, called Meta-Double Long Short-Term Memory, to accurately predict aerodynamics of vertical-axis wind turbines. In this model, Double Long Short-Term Memory module utilizes the upwind region and downwind region models to characterize the interactions among regions, while model-agnostic meta-learning is used to capture knowledge across different datasets in a two-stage strategy. Experimental results indicate that this model outperforms other baselines with the lowest errors of 2.21 % and 1.85 % for the peak torque coefficient and the corresponding azimuthal angle, respectively. Global sensitivity analysis reveals that turbine rotational speed (<em>ω</em>) has the greatest impact on prediction results, while upwind aerodynamics and geometrical parameters also significantly affect downwind predictions. Additionally, the proposed model can effectively optimize turbine parameters and provides detailed time series of aerodynamic parameters for in-depth analysis. By using a meta-learning approach and considering regional interactions, the proposed model improves the accuracy of aerodynamic predictions for vertical-axis wind turbines, and its training methodology can be applied to other renewable energy systems.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":""},"PeriodicalIF":9.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Techno-economic and environmental impacts of hybridization and low-carbon fuels on heavy-duty trucks
IF 9.9 1区 工程技术
Energy Conversion and Management Pub Date : 2025-03-13 DOI: 10.1016/j.enconman.2025.119634
Kangjie Liu , Zhiyu Han , Junbo Zhang , Ziwei Tang , Haifeng Tang
{"title":"Techno-economic and environmental impacts of hybridization and low-carbon fuels on heavy-duty trucks","authors":"Kangjie Liu ,&nbsp;Zhiyu Han ,&nbsp;Junbo Zhang ,&nbsp;Ziwei Tang ,&nbsp;Haifeng Tang","doi":"10.1016/j.enconman.2025.119634","DOIUrl":"10.1016/j.enconman.2025.119634","url":null,"abstract":"<div><div>Heavy-duty trucks account for a significant share of petroleum consumption and CO<sub>2</sub> emissions in the automotive sector. However, their transition to low-carbon renewable energy has lagged behind that of passenger vehicles. This study systematically evaluates the performance, energy consumption, total cost of ownership (TCO), and well-to-wheel (WTW) CO<sub>2</sub> emissions of various low-carbon fuel powertrains and fuel-electric hybrid systems for heavy-duty long-haul trucks. The fuels considered include liquefied natural gas (LNG), methanol, hydrogen, and electricity, while the hybrid systems evaluated are series, parallel, and series–parallel configurations. Design parameters of these diesel-electric hybrid systems were first optimized to achieve improved performance and cost-efficiency. The series–parallel design emerged as the most effective configuration and was subsequently applied to other fuel hybrid systems. The analysis revealed that hybrid trucks consistently outperformed conventional engine trucks in energy consumption, TCO, and CO<sub>2</sub> emissions across all fuel types. Diesel-, LNG- and methanol-electric hybrid trucks were more cost-effective than battery-electric trucks, underscoring hybridization as a pivotal technology for energy savings and emissions reduction in logistics. Hydrogen engine and hydrogen hybrid trucks exhibited higher TCOs compared to diesel-based systems, while LNG and methanol hybrid trucks offered the lowest TCOs, highlighting the economic barriers to widespread hydrogen adoption. The WTW CO<sub>2</sub> emissions were highly dependent on the production pathways of methanol and hydrogen. For instance, trucks fueled by coal gasification-derived hydrogen emitted 2.64 times the CO<sub>2</sub> of diesel trucks, whereas hydrogen produced from renewable electricity reduced CO<sub>2</sub> to just 29.3% of diesel levels. Similarly, coal-derived methanol increased CO<sub>2</sub> emissions by 3.95 times compared to diesel, while methanol synthesized from industrial CO<sub>2</sub> exhausts and hydrogen from coke oven gases achieved a 22.8% reduction. These findings highlight that transitioning heavy-duty trucks to methanol and hydrogen fuels requires a parallel shift toward sustainable, low-carbon fuel production methods to maximize environmental benefits.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"332 ","pages":"Article 119634"},"PeriodicalIF":9.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
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