Renewable Energy最新文献

{"title":"The impact of Fintech and green bonds on the Indian renewable energy production","authors":"Nenavath Sreenu","doi":"10.1016/j.renene.2024.121807","DOIUrl":"10.1016/j.renene.2024.121807","url":null,"abstract":"<div><div>This study explores the important roles of Fintech and green bonds in promoting clean energy generation in India, while also analyzing the related risk dynamics. Expanding on prior research that emphasizes the significant influence of digital finance and innovative financial instruments on sustainable development, this study employs a rigorous methodology and thorough data analysis to offer fresh perspectives on their collaborative connection. Previous research has shown how Fintech can make finance more accessible to everyone, lower transaction costs, and improve transparency by utilizing technologies like digital platforms, mobile payments, and blockchain. In the same vein, green bonds have gained recognition for their ability to attract investment for environmental initiatives. This study expands on these findings in the Indian context, demonstrating how Fintech can further improve financing for renewable energy projects and how green bonds can contribute to sustainable energy initiatives. The research highlights the significance of proactive regulatory frameworks to adapt to the changing market landscape, guaranteeing strong regulations and effective risk management. This study provides valuable insights into the role of policymaking in promoting a sustainable future, which can help enhance environmental sustainability efforts in India.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121807"},"PeriodicalIF":9.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658567","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":"Synergistic solar electricity-water generation through an integration of semitransparent solar cells and multistage interfacial desalination","authors":"Yushi Chen ,&nbsp;Hanxuan Zeng ,&nbsp;Hao Peng ,&nbsp;Zhouyang Luo ,&nbsp;Hua Bao","doi":"10.1016/j.renene.2024.121837","DOIUrl":"10.1016/j.renene.2024.121837","url":null,"abstract":"<div><div>Energy shortage and freshwater scarcity are critical challenges for the sustainable development of the society. The photovoltaic-thermal (PVT) hybrid system offers a promising strategy by harnessing solar energy for electricity and water cogeneration. However, existing systems suffer from relatively low efficiency due to incomplete solar spectrum utilization. To address this, we propose a novel PVT integrated system that combines semi-transparent solar cells and multistage interfacial stills to maximize solar spectrum utilization, allowing for efficient electricity and freshwater co-production. Experimental results demonstrate a record-high solar-to-vapor efficiency of 210 % with a production rate of 3.17 L m⁻² h⁻¹ under one-sun, while maintaining an uncompromised electrical efficiency of 19.57 %. Furthermore, we employ a verified theoretical framework to provide optimized strategies for concurrent enhancement of electricity-water production, by improving internal heat and mass transfer and effectively reducing the thickness of the interstage air gap. Moreover, we introduce a non-contact model for system structure optimization proposed to match the high transmittance of solar cells. This work realizes full solar spectrum utilization to cogenerate electricity and freshwater, offering optimized strategies from the thermal perspective for future research.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121837"},"PeriodicalIF":9.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658673","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":"Driving renewable energy innovation investments: Is venture capital a novel strategic choice? Evidence from China","authors":"Boqiang Lin,&nbsp;Yongjing Xie","doi":"10.1016/j.renene.2024.121856","DOIUrl":"10.1016/j.renene.2024.121856","url":null,"abstract":"<div><div>The relationship between venture capital (VC) and corporate innovation has been a topic of debate. Most existing studies have focused on the general effects of VC on innovation investments, neglecting the specific mechanisms. In the global transition toward low-carbon energy, renewable energy (RE) is increasingly becoming a focus area for VC. However, whether VC can effectively stimulate innovation investments in RE firms remains uncertain. This study addressed these gaps by systematically investigating the impact of VC on renewable energy innovation investments (REII) using data from 114 listed RE companies in China from 2011 to 2023. Our findings demonstrate that VC significantly stimulates REII, with a particularly pronounced effect in high-growth and profitable companies, thereby providing new empirical evidence to the ongoing debate on VC's role in corporate innovation. Furthermore, we uncover that VC not only alleviates financial mismatch but also reduces rent-seeking costs, thereby indirectly fostering innovation. These mechanisms help explain how VC can enhance the innovation capabilities of RE companies. Lastly, we find that joint VC, state-owned VC, and long-term VC are especially conducive to promoting innovation. Based on these findings, we offered targeted policy suggestions to boost the innovation potential of China's RE sector.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121856"},"PeriodicalIF":9.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658557","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":"Fuel properties evaluation and inherent correlation analysis of oxidatively torrefied corn stalk","authors":"Congyu Zhang ,&nbsp;Yong Zhan ,&nbsp;Wei-Hsin Chen ,&nbsp;Ying Zhang","doi":"10.1016/j.renene.2024.121855","DOIUrl":"10.1016/j.renene.2024.121855","url":null,"abstract":"<div><div>Fuel properties evaluation and inherent correlation analysis of the biochar are important in assessing the variation of fuel performance. This study investigates fuel performance changes under different oxidative torrefaction conditions of corn stalks. The obtained results imply that such a method is conducive to enhancing fuel properties, with the values of energy-mass co-benefit index (EMCI), upgrading energy index (UEI), Hardgrove grindability index (HGI), and equilibrium moisture content (EMC) range at 4–9, 500–3500, 60–120, and 9.5–12. This indicates that oxidative torrefaction is efficient for fuel performance improvement. For elemental transformation and carbonization degree, the oxidatively torrefied biochar possesses a higher proportion of elemental carbon content and better graphitization degree (GD), thus contributing to a more stable structure. Good linear relationships are exhibited from the analysis of comprehensive pyrolysis index (CPI) versus elemental carbon proportion (ECP), comprehensive combustion index (CCI) versus ECP, CPI versus GD, and CCI versus GD, with correlation coefficients of 0.9741, 0.9524, 0.9689, and 0.9166, respectively. This suggests that the carbonization extent is highly related to biochar pyrolysis and combustion characteristics. Overall, the obtained results are conducive to enhancing inherent correlation cognition of fuel property indicators. In doing so, the fuel property can be better adjusted for performance enhancement, thus facilitating efficient biochar production with better industrial application potential.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121855"},"PeriodicalIF":9.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658518","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":"Unveiling the potential of Au cocatalysts to induce SPR charges on CuO/CdS system for sunlight driven hydrogen production†","authors":"Abubakar Ishaq,&nbsp;Khezina Rafiq,&nbsp;Muhammad Zeeshan Abid,&nbsp;Umme Aiman,&nbsp;Ejaz Hussain","doi":"10.1016/j.renene.2024.121817","DOIUrl":"10.1016/j.renene.2024.121817","url":null,"abstract":"<div><div>Atmospheric pollution and increasing costs of the fossil fuels have compelled researchers to explore the alternative sources. Objective of current project is to discover catalysts that can drive water splitting reaction with sunlight. To the purpose, visible light active catalysts i.e., CdS, CuO/CdS, and Au@CuO/CdS have been synthesized and evaluated for hydrogen generation activities. Gold cocatalysts have been employed to enhance the surface stability and catalytic efficiencies. Whereas, CuO/CdS heterojunction have been synthesized to improve charge separation ability. The optical characteristics, structural properties, and morphology of catalysts have been evaluated by UV–Vis/DRS, XRD, Raman, BET, SEM, AFM, PL and FTIR techniques. Chemical compositions, photocurrent or charge transfer have been verified with XPS, EDX and EIS results. Catalytic reactions were performed in photoreactor (150 mL/Pyrex), whereas hydrogen production activities were predicted via online GC-TCD (Shimadzu-2010/Japan). Results depict that catalyst with 0.8 % of Au on CuO/CdS exhibit relatively higher activity (i.e., 32.13 mmol g⁻¹ h⁻¹) than the other catalysts of the series. Higher activities were attributed to the presence of Au cocatalysts. It has been predicted that existence of gold develops Schottky junctions that progressively rectify the surface charges (i.e., movement of electrons). Additionally, gold induces the SPR charges and enhances activity of electrons. Schottky junctions formed by Au cocatalysts on CuO/CdS system restrict the charge recombination i.e., back reactions. In this study, various factors like temperature, pH, light intensity and dose of catalysts have been assessed and discussed. On the basis of activities, it has been concluded that work reported herein hold promise to replace the conventional catalysts used for hydrogen energy technologies.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121817"},"PeriodicalIF":9.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662809","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":"Optimizing production well geometry in the Utah FORGE geothermal project using machine learning and fluid flow modeling","authors":"Yanrui Ning ,&nbsp;Jeffrey R. Bailey ,&nbsp;Jeff Bourdier ,&nbsp;Prathik Prasad ,&nbsp;Israel Momoh","doi":"10.1016/j.renene.2024.121767","DOIUrl":"10.1016/j.renene.2024.121767","url":null,"abstract":"<div><div>This study addresses the critical challenge of optimizing well placement in Enhanced Geothermal Systems (EGS), specifically within the framework of the Utah FORGE geothermal project, as part of the 2023 Society of Petroleum Engineers (SPE) Geothermal Datathon. Effective well placement is essential for enhancing geothermal production efficiency and maximizing resource utilization. We employed a discrete fracture network (DFN) modeling approach, utilizing the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm from the Scikit-Learn library to analyze microseismic event location data. Through rigorous simulations conducted in the open-source GeoDT fluid flow simulator, we identified an optimal production well configuration characterized by a spacing of 400 m, an injection rate of 0.03 m³/s, and alignment parameters that significantly improve thermal recovery. The results indicate a projected net present value (NPV) of $75 million over a 20-year operational horizon, underscoring the economic potential of optimized well placement strategies. This study offers valuable insights for the operation of the FORGE geothermal site. More importantly, it exclusively utilizes open-source tools, enhancing accessibility and adaptability for the broader geothermal community.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121767"},"PeriodicalIF":9.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658525","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":"Investigation of the transient characteristics of the Francis turbine during runaway process","authors":"Yanyan Li ,&nbsp;Longgang Sun ,&nbsp;Pengcheng Guo","doi":"10.1016/j.renene.2024.121840","DOIUrl":"10.1016/j.renene.2024.121840","url":null,"abstract":"<div><div>Transient hydraulic phenomena, including flow separation, vortex structure and high amplitude pressure fluctuation, occur in the turbine during runaway process, significantly affecting the safe and stable operation. To clarify the unsteady flow characteristics in the runaway process, this paper focus on a low head model Francis turbine, examining the transient flow dynamics from rated speed to runaway speed. Numerical simulations show good agreement with experimental test results for the runaway speed and discharge. Results identify that two typical cavitation vortex structures within the runner: A cloud cavitation vortex near the hub on the pressure side and a columnar cavitation vortex on the suction side. Further analysis reveals that the pressure fluctuation induced by the former are low-frequency (0.08<em>fn</em> and harmonics), whereas those induced by the latter are high-frequency (1.16<em>fn</em> and harmonics). Entropy production analysis in homogeneous flow indicates that energy dissipation mainly occurs in the runner and draft tube during the runaway process. Turbulent entropy production within the turbine comprises a significant portion of the total entropy production. Additionally, areas around the recirculation zone exhibit considerable high entropy production, indicating that the energy of the fluid is dissipated by cavitation vortex structures generated in these areas. Additionally, the analysis indicates that the entropy production rate correlates with vapor generation, underscoring the cavitation vortex as the primary cause of energy dissipation. This investigation can provide valuable insights into the energy dissipation mechanisms during the runaway process.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121840"},"PeriodicalIF":9.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658667","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":"State-of-the-art nonstationary hypersurface damage assessment approach for energy harvesters","authors":"Oleg Gaidai,&nbsp;Shicheng He,&nbsp;Fang Wang","doi":"10.1016/j.renene.2024.121824","DOIUrl":"10.1016/j.renene.2024.121824","url":null,"abstract":"<div><div>Since EH (Energy Harvesters) constitute nowadays a vital part of renewable energy engineering, experimental research is required in addition to numerical modeling, serving reliable structural design and ensuring prolonged device service time. The performance of GPEH (GalloPing EH) has been examined in this case study, utilizing comprehensive laboratory wind tunnel tests, carried out under realistic windspeed conditions. Novel structural multivariate risks assessment methodology, presented here, being feasible for nonstationary nonlinear GPEH dynamic systems, that had been either physically measured over a representative period, providing jointly quasi-ergodic time-series, or directly numerically MCS (Monte Carlo Simulated). Based on laboratory-measured GPEH dynamics, the presented analysis demonstrates that the proposed multivariate hypersurface methodology offers robust predictions of the structural failure/damage risks. Furthermore, when dealing with raw measured timeseries, representing the high-dimensional dynamic system, existing risk assessment techniques struggle to handle nonlinear inter-correlations between GPEH critical components. This case study's main objective has been to validate and benchmark the novel multimodal risk assessment methodology, which utilizes multivariate nonstationary lab-recorded time histories to extract relevant design information from the underlying GPEH dynamics.</div><div>The proposed state-of-the-art nonstationary hypersurface reliability approach being of a generic nature, offering additional capacity for damage/failure risks prognostics for a wide range of nonlinear multidimensional nonstationary systems. Forecasted damage and failure risks have been supplied with confidence bands, demonstrating the experimental setup's robustness, as well as the useful design features of the presented nonstationary hypersurface risks assessment methodology. It should be noted that the presented reliability methodology being mathematically exact, and it does not rely on simplifying assumptions.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121824"},"PeriodicalIF":9.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658669","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":"Theoretical prediction of a high-performance two-dimensional type-II MoSi2N4/As vdW heterostructure for photovoltaic solar cells","authors":"Deobrat Singh ,&nbsp;Nabil Khossossi ,&nbsp;Raquel Lizárraga ,&nbsp;Yogesh Sonvane","doi":"10.1016/j.renene.2024.121802","DOIUrl":"10.1016/j.renene.2024.121802","url":null,"abstract":"<div><div>Solar cells are expected to become one of the dominant electricity generation technologies in the coming decades. Developing high-performance absorbers made from thin materials is a promising pathway to improve efficiency and reduce cost, accelerating the widespread adoption of these photovoltaic cells. In the present work, we have systematically investigated the 2D MoSi₂N₄/Arsenene van der Waals (vdW) heterostructure, which exhibits a type-II band alignment with an indirect band gap semiconductor (1.58 eV), that can effectively separate the photogenerated electron–hole (e<span><math><msup><mrow></mrow><mrow><mo>−</mo></mrow></msup></math></span>–h<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span>) pairs. Compared to the isolated MoSi₂N₄ and Arsenene monolayers, the optical absorption strength can be significantly enhanced in MoSi₂N₄/Arsenene vdW heterostructure (in the order of <span><math><mo>∼</mo></math></span>10⁵ cm⁻¹ in the visible region). The calculated optical absorption gaps are 2.12 eV (Arsenene) and 1.76 eV (MoSi<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>N<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>), with excitonic binding energies of 0.05 eV for arsenene and 0.48 eV for MoSi<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>N<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>, indicating that both materials can effectively form excitons and separate charges. Moreover, we found a high spectroscopic limited maximum efficiency of 27.27% for the MoSi₂N₄/Arsenene vdW heterostructure, which is relatively higher compared to previously reported 2D heterostructures. <em>Ab-initio</em> molecular dynamics (AIMD) simulations at 300 K, 600 K, and 900 K were conducted to evaluate the thermal stability of the MoSi₂N₄/Arsenene heterostructure. Simulations in the presence of water and NO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> at 300 K were also performed to assess its resilience to humidity and pollutants. The results suggest strong stability under harsh environmental conditions. Our findings demonstrate that the 2D MoSi₂N₄/Arsenene vdW heterostructure is an excellent candidate for both photovoltaic device applications and optoelectronic nanodevices.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121802"},"PeriodicalIF":9.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658556","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":"Validation through internal flow physics of response surface methodology optimized mixed flow pump as turbine","authors":"Xu Zhou ,&nbsp;Sun Sheng Yang ,&nbsp;Punit Singh ,&nbsp;Ling Zhou","doi":"10.1016/j.renene.2024.121838","DOIUrl":"10.1016/j.renene.2024.121838","url":null,"abstract":"<div><div>In order to determine the optimal working efficiency of mixed flow pumps as turbine (MF-PAT) under a design condition of 10m3kw, this study takes the number of blades, blade wrap angle, impeller outer diameter, and impeller inlet width as design variables. Based on the center combination design method, experimental scheme design is carried out, and the head, shaft power, and efficiency of the turbine are used as evaluation indicators. A response surface model is constructed for optimization analysis, and the optimal geometric parameter combination of the impeller for MF-PAT is determined. For MF-PAT with forward-curved blade impeller in this paper, the optimal parameter combination is recommended as blade number Z = 6, blade wrap angle <span><math><mrow><mi>α</mi></mrow></math></span> = 47°, impeller outer diameter D₂ = 140 mm and impeller inlet width b₂ = 34 mm. The results show that compared with the original scheme, its efficiency has increased by 7.8 %. The established response surface model can reflect the relationship between evaluation indicators and design variables, and can be used for optimizing the geometric parameters of MF-PAT impellers. It can effectively enhance the blade's constraint ability on liquid flow, reduce hydraulic losses, and improve the performance of MF-PAT. Apply the n_s-d_s methodology for this and future mixed flow optimized pumps as turbines.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121838"},"PeriodicalIF":9.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658565","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}