Renewable Energy最新文献

{"title":"Based on the centrifugal force and the coupling of the magnetic linkage effect broadband rotational energy harvester","authors":"Linqiang Feng,&nbsp;Lipeng He,&nbsp;Chensheng Wang,&nbsp;Jingwei Yang,&nbsp;Jing Li,&nbsp;Bowen Yang","doi":"10.1016/j.renene.2025.122640","DOIUrl":"10.1016/j.renene.2025.122640","url":null,"abstract":"<div><div>In this paper, based on the centrifugal force and the coupling of the magnetic linkage effect broadband rotational energy harvester (CM-REH) is proposed. It can operate efficiently over a wide frequency range, especially low-frequency excitation. The structure uses centrifugal force to make the position of the exciter in the turntable change with the change of rotational speed, and is coupled with the magnet at the tip of the piezoelectric sheet, and then realizes broadband through the magnetic linkage effect between the three piezoelectric sheets. It is shown that spring stiffness and magnetic spacing have a significant influence on power generation performance and broadband effect. The optimal structural parameters of the device are determined as the spring wire diameter is 0.5 mm, the magnetic moment is 16 mm, and the peak-to-peak voltage is 61.6 V at 300 rpm. In the frequency range of 0–10 Hz, it can produce up to 4.9 mW of output power, which is 300 % wider than the traditional non-magnetic-linkage effect structure, and the power is increased by 80 %. In summary, CM-REH can effectively collect rotational energy in a wide band, and has broad application prospects in wireless self-power supply and self-sensing.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122640"},"PeriodicalIF":9.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428049","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}

{"title":"Evaluation of calcium doped Ba-Co-Nb-O perovskite as cathode materials for intermediate-temperature solid oxide fuel cells","authors":"TongYuan Xu,&nbsp;Chao Huang,&nbsp;Liping Sun,&nbsp;Lihua Huo,&nbsp;Hui Zhao","doi":"10.1016/j.renene.2025.122662","DOIUrl":"10.1016/j.renene.2025.122662","url":null,"abstract":"<div><div>High-performance cathode materials are critical for the commercialization of solid oxide fuel cells (SOFCs). In this study, an isovalent doping strategy is developed to improve the electrocatalytic performance and stability of Ba_1-xCa_xCo_0.8Nb_0.2O_3-δ for the first time. Multiple experimental characterization results combing with the DFT calculations prove that Ca²⁺ doping effectively reduces the valence state of cobalt, and leads to a decrease in covalency between Co and O, therefore promotes the creation of oxygen vacancies. The best electrochemical performance is achieved in the material with Ca²⁺ doping concentration of x = 0.15. The cathode shows the smallest polarization resistance of 0.019 Ω cm² at 700 °C, and the single cell exhibits the maximum power density (MPD) of 780 mW cm⁻². Meanwhile, the stability and CO₂ tolerance properties are improved.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122662"},"PeriodicalIF":9.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436835","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}

{"title":"Interfacial electron redistribution through the Ru-N-Fe bond to stabilize high-valence metal sites for efficient electrocatalytic oxygen evolution","authors":"Wei Wang ,&nbsp;Yingwei Li ,&nbsp;Jia Wang ,&nbsp;Rui Xiao ,&nbsp;Kuanguan Liu ,&nbsp;Xudong Song ,&nbsp;Guangsuo Yu ,&nbsp;Baojun Ma","doi":"10.1016/j.renene.2025.122656","DOIUrl":"10.1016/j.renene.2025.122656","url":null,"abstract":"<div><div>The sluggish oxygen evolution reaction (OER) represents a critical bottleneck in renewable energy technologies, such as water electrolysis. Although RuO₂ is the most active material for OER, it suffers from the significant loss in performance due to the over-oxidation of Ru cations. Here, a hybrid FeV oxide/nitride electrocatalyst anchored strategy is creatively proposed to stabilize atomically isolated Ru for outstanding OER activity. The oxidation state of Ru is in high-valence (Ruⁿ⁺, n &gt; 4) and remains stable during the OER process. This is realized by the VO_x leaching and the electrons redistributed through the interfacial Ru-N-Fe bond. Furthermore, a highly reactive Ru and Fe sites can be generated, which synergistically optimize the reaction thermodynamics and kinetics. These crucial findings offer a simple approach to design cost-efficient, highly catalytic heterogeneous system for OER in renewable energy devices.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122656"},"PeriodicalIF":9.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422282","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}

{"title":"A comparative analysis of thermosolar and photovoltaic systems for meeting residential hot water demands","authors":"Jucimar Augusto Pinto,&nbsp;Geraldo Lúcio Tiago Filho,&nbsp;Ana Luisa Cardoso de Jesus,&nbsp;Matheus David Guimarães Barbedo,&nbsp;Ivan Felipe Silva dos Santos,&nbsp;Regina Mambeli Barros,&nbsp;Fernando das Graças Braga da Silva","doi":"10.1016/j.renene.2025.122652","DOIUrl":"10.1016/j.renene.2025.122652","url":null,"abstract":"<div><div>Electric Shower Heads (ESHs) are commonly employed for bathing In Brazil and other developing nations, given their installation and maintenance affordability. However, these devices consume a significant amount of electricity to heat the water, leading to higher household electricity bills. Renewable alternatives like thermal and solar photovoltaic energy could be used to provide hot water solutions for residential buildings. While other energy sources e.g., piped natural gas (NG) or liquefied petroleum gas (LPG), can also be used to heat water, their practicality of use is limited in Brazil. In this paper, we study the cost-effectiveness of residential thermosolar systems versus electric shower heating systems. Here we studied residential buildings equipped with self-generation photovoltaic systems connected to the electricity distribution grid operating under Brazil's Distributed Generation (DG) rules, compared to residences without these systems. Our economic analyses employed the Payback, Net Present Value (NPV), Internal Rate of Return (IRR), and Levelized Cost of Electricity (LCOE). The findings indicate that the most economically viable option for residential units was using ESHs together with photovoltaic generation systems. This resulted in an NPV of US$ 1078.2, an IRR of 13.1 % and an LCOE of 0.0782 US$/kWh over 25 years.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122652"},"PeriodicalIF":9.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422386","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}

{"title":"Optimising suction bucket foundation installation for offshore renewable energy infrastructure through field data on self-weight penetration","authors":"Lunbo Luo ,&nbsp;Xingzheng Zhou ,&nbsp;Zefeng Zhou ,&nbsp;Weichen Wang ,&nbsp;Xianwei Zhang ,&nbsp;Jinhui Li","doi":"10.1016/j.renene.2025.122646","DOIUrl":"10.1016/j.renene.2025.122646","url":null,"abstract":"<div><div>In recent years, the suction bucket foundation (SBF) has emerged as a preferred option for offshore wind turbines. However, accurately predicting penetration resistance remains a critical challenge, essential for determining self-weight penetration depth and the required suction during installation. Typically, SBF installation comprises two phases: the self-weight penetration phase and the suction-assisted installation phase. The current cone penetration test (CPT)-based prediction method primarily focuses on the suction installation phase, utilising only one set of design parameters (i.e. <em>k</em>_p and <em>k</em>_f). As a result, design parameters are typically calibrated against available installation data to achieve agreement for the suction installation phase, overlooking discrepancies in the predicted self-weight installation phase. The accuracy of predicted self-weight penetration significantly influences the evaluation of lifting crane operation, safety, the magnitude of suction pressure, and tilt of the suction bucket foundation system. This study addresses the reasons for these discrepancies and identifies shortcomings in the current CPT method. It introduces a new set of design parameters for evaluating the self-weight penetration phase, incorporating soil classification and distinguishing between the self-weight penetration (SWP) and suction penetration phases. Leveraging data from 35 SBF field installation sites in the South China Sea, back calculations are conducted to propose design parameters for SWP depth evaluation. The study underscores the importance of considering SBF installation in two distinct phases, providing fresh insights for enhanced design guidance, and highlights the economic and technical advancements in design practice with the new set of design parameters for SWP.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122646"},"PeriodicalIF":9.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422300","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}

{"title":"Efficient biomass utilization for power, cooling, and hydrogen: A multi-generation approach with environmental and economic assessment","authors":"Anshou Yao ,&nbsp;Junhua Wu","doi":"10.1016/j.renene.2025.122645","DOIUrl":"10.1016/j.renene.2025.122645","url":null,"abstract":"<div><div>The development of efficient and environmentally friendly biomass utilization methods for power generation remains a critical area of research. This study proposes an innovative multigeneration system centered on a biomass-fueled solid oxide fuel cell (SOFC). The configuration efficiently recovers waste heat by integrating an organic flash cycle, an ejector refrigeration cycle, and an organic Rankine cycle, alongside an electrolyzer to produce power, cooling, and hydrogen. The system's performance is comprehensively analyzed from thermodynamic, economic, and environmental perspectives. Optimal operating conditions are identified through a triple-objective optimization framework. The results reveal that the heat exchangers within the gasifier-SOFC integration are the primary sources of exergy destruction. Moreover, heat exchangers and electrolyzers are the largest contributors to the system's costs and environmental impact due to their exergy inefficiencies. The study determines the optimal fuel cell current density to be 5546 A/m², beyond which system performance declines significantly. Under optimal conditions, the product costs and environmental impact rate are approximately $12.06 per hour and 31.1 mPts/s, respectively. The system achieves an exergetic efficiency of 32.56 %, a payback period of 2.26 years, and a net present value of $2.56 million. These findings underscore the potential of the proposed multigeneration system to enhance efficiency, reduce costs, and minimize environmental impact, offering a promising solution for sustainable biomass utilization.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122645"},"PeriodicalIF":9.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444343","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}

{"title":"A novel radiative cooling system with a dissimilar material-based compound parabolic concentrator for mitigating daytime solar radiation impact","authors":"Ya Dan ,&nbsp;Qiliang Wang ,&nbsp;Mingke Hu ,&nbsp;Dongliang Zhao ,&nbsp;Gang Pei ,&nbsp;Yuehong Su ,&nbsp;Saffa Riffat","doi":"10.1016/j.renene.2025.122622","DOIUrl":"10.1016/j.renene.2025.122622","url":null,"abstract":"<div><div>Radiative sky cooling (RC) is a promising passive heat dissipation technology for building energy conservation but suffers from sensitivity to daytime solar radiation and an inherently low cooling power density. To address these challenges, a novel dissimilar material-based compound parabolic concentrator (DCPC) is first proposed and integrated into an RC system. The asymmetric DCPC features a dissimilar material design: a transparent wing framework covered with a transparent infrared-reflective film (TIRF) on one side and a high-reflectivity mirror wing on the other, aiming to enhance solar shielding while maximizing thermal emission for RC panels. In this work, a mathematical model, validated through experiments conducted in Nottingham, UK, is developed to explore the effects of TIRF's optical properties and the module's tilt angle on cooling performance. Effects of diverse tilt angles for the DCPC-RC module are also analysed based on annual solar profile angles. The experiment results demonstrate that the DCPC-RC module's emitter can achieve sub-ambient temperature during the daytime. When located in Rome and tilted at 30° toward the anti-sunward side, it achieves an average cooling power density of 135.24 W/m² within the solar profile angles of 40–50°, a 22.7 % increase over the horizontal module. This work establishes the DCPC-RC system as an efficient and scalable solution for enhancing passive cooling performance in energy-efficient buildings across diverse climatic conditions.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122622"},"PeriodicalIF":9.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422391","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}

{"title":"Controls on the temperature of the produced fluid in a double well ATES system","authors":"Emma Lepinay,&nbsp;Andrew W. Woods","doi":"10.1016/j.renene.2025.122508","DOIUrl":"10.1016/j.renene.2025.122508","url":null,"abstract":"<div><div>We investigate the temperature evolution of a double-well low-temperature aquifer thermal energy storage system consisting of a hot and a cold permeable reservoir in the subsurface. The wells are used cyclically to provide a supply of thermal energy in the winter and a thermal sink in the summer. The system is paired with a heat pump at the surface which can raise the temperature of the aquifer fluid, to meet the heating demand in the winter, and can also drop the temperature of the aquifer fluid, to meet the cooling demand in the summer. These systems provide a low-carbon solution for space heating and cooling, which currently makes up over a third of the greenhouse gas emissions in the UK. Our results show how fundamental modelling of the complex heat transfer in the geological formation can help identify optimal operating principles for ATES systems. Our modelling focuses on coupled wells where the extraction temperature of one well, as well as the temperature change imposed by the heat pump, determines the injection temperature of the other well. Our results highlight that the heat transfer between the injected volume and the subsurface leads to a continuous change in the extraction temperature during each cycle. We find that after many cycles, the mean extraction temperatures of the hot and cold wells tend to <span><math><mfrac><mrow><mi>Δ</mi><mi>T</mi></mrow><mrow><mn>2</mn></mrow></mfrac></math></span> and <span><math><mrow><mo>−</mo><mfrac><mrow><mi>Δ</mi><mi>T</mi></mrow><mrow><mn>2</mn></mrow></mfrac></mrow></math></span>, respectively, where <span><math><mrow><mi>Δ</mi><mi>T</mi></mrow></math></span> is the temperature difference between the extraction temperature of one well and the injection temperature of the other well. Furthermore, we find that the season in which the system is started has a significant impact on the extraction temperatures of both wells in the first 5–10 cycles. If a system is started in the winter, to initially provide space heating, we observe the extraction temperature of both wells gradually increase from cycle to cycle towards the equilibrium temperatures. But if a system is started in the summer, to initially provide space cooling, the extraction temperatures gradually cool down towards the equilibrium temperatures. We compare the electricity usage in the heating season of a double well ATES system with a simple system which extracts at the ambient temperature of the aquifer. We show that a double well system started in the summer can have an average reduction of 9.9% in its electricity usage for heating, over 20 years. While, a system started in the winter can have an average reduction of 7.1 %, over 20 years. Our modelling therefore provides a framework to optimise operation of such systems.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122508"},"PeriodicalIF":9.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422299","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}

{"title":"Measuring regional variations and analyzing determinants for global renewable energy","authors":"Shuai Chen","doi":"10.1016/j.renene.2025.122644","DOIUrl":"10.1016/j.renene.2025.122644","url":null,"abstract":"<div><div>The extensive application and continuous innovation of renewable energy are propelling the transformation of the global energy system. This study deeply analyzes the regional differences, convergence and influencing factors of global renewable energy from the perspective of space and time. The findings are as follows: Firstly, the global level of renewable energy development has shown a steady upward trend. North American and Asian countries such as China and Japan have demonstrated remarkable achievements in renewable energy development, whereas most countries in South America and Africa remain at a relatively low level. Secondly, the imbalance in the development of global renewable energy primarily originates from regional structural differences, and the global gap in per capita renewable energy production is narrowing. Thirdly, the low-low agglomeration areas of per capita renewable energy are not only distributed in East Asia and South Asia but also extend to South America and Southeast Asia, the high-high concentration areas are distributed in countries such as Ireland, Norway and Sweden. Fourthly, environmental pressure promotes the development of renewable energy in Southeast Asia, gasoline prices and industrial development have a positive impact on the development of renewable energy, with a stronger effect in the western regions than in the eastern ones. The energy structures and foreign investment in North America and Europe inhibit the development of renewable energy.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122644"},"PeriodicalIF":9.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422280","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}

{"title":"A MPC-based load frequency control considering wind power intelligent forecasting","authors":"Pei Wang ,&nbsp;Jiang Guo ,&nbsp;Fangjuan Cheng ,&nbsp;Yifeng Gu ,&nbsp;Fang Yuan ,&nbsp;Fangqing Zhang","doi":"10.1016/j.renene.2025.122636","DOIUrl":"10.1016/j.renene.2025.122636","url":null,"abstract":"<div><div>Currently, the significant randomness of wind power hampers the stability of the grid system. Furthermore, existing control strategies, which solely rely on current measured wind power output, are inadequate in addressing the rapid and continuous fluctuations of wind power. Based on this, a novel load frequency control (LFC) that combines wind power prediction and model predictive control (MPC) is proposed in this paper. The high-precision wind power forecasts are embedded into the MPC, enabling MPC to develop robust control strategies that flexibly respond to the random variability of wind power. For wind power prediction, an improved Reformer model with inversion and gated linear unit (GiReformer) is constructed, which achieves multi-step predictions of wind power at the microscale. In addition, Laguerre function is introduced in MPC to reduce the computational load, and the settings for frequency constraints, generate rate constraints (GRC), control input constraints and terminal constraints ensures the safe and stable operation of the power grid. According to simulations in a high-proportion hydropower system and a multi-energy and multi-regional interconnected power system, the proposed method alleviates system frequency fluctuations up to 71.88 % and 51.78 %, respectively, compared to the comparative methods. In addition, constraints are well handled by the proposed method.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122636"},"PeriodicalIF":9.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422393","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}