Green Technologies and Sustainability最新文献

{"title":"Application of a simple organic acid as a green alternative for the recovery of cathode metals from lithium-ion battery cathode materials","authors":"P.M. Tembo,&nbsp;R.N. Werner,&nbsp;V. Subramanian","doi":"10.1016/j.grets.2024.100135","DOIUrl":"10.1016/j.grets.2024.100135","url":null,"abstract":"<div><div>Industrialization, technology, and population growth have on one hand resulted in the rapid rise for energy demand and on the other hand led to the pursuit for alternative carbon neutral energy sources to satisfy demand, address climate change and promote sustainable development. The transition to renewable energy sources has resulted in the rapid rise in energy storage options with battery technologies at the forefront. Lithium-ion batteries (LIBs) have emerged as a leading battery energy storage option. The rise in LIB technology demand has resulted in a proportional increase in the demand for the various materials used in their manufacture. Primary sources of several of the LIB component materials largely consist of mining activities, however, recycling has emerged as a promising secondary material source. In this work, we evaluate the application of a green, organic acid treatment approach utilizing propionic acid in the recovery of key metals from LIB cathode materials. The study delved into exploring the application of both commercially sourced virgin LIB cathode powder (VCP) and recovered spent LIB cathode powder (SCP) and investigating the system leaching characteristics. The highest metal recoveries were obtained on leaching the SCP, with metal recoveries determined as 92.9%, 87.4%, 92.7% and 94.0% for Co, Li, Mn and Ni respectively. The difference in the recoveries on leaching metals from the VCP and SCP was under 5% for each metal. Further, the leaching model was determined as chemical reaction-controlled on using the SCP, and the activation energies were evaluated as 60.37 kJ/mol, 53.38 kJ/mol, 63.98 kJ/mol and 60.20 kJ/mol for Co, Li, Mn and Ni respectively, agreeing with the deduced chemical reaction-controlled leaching mechanism. By application of a simple organic acid, propionic acid, for organic acid leaching operations we contribute to the diversification of the lixiviant options for LIB waste treatment.</div></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100135"},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conceptual and practical aspects of circular maturity management in corporate industrial ecosystems: The case of Novolipetsk Steel and Metalloinvest","authors":"Elena Shkarupeta ,&nbsp;Aleksandr Babkin ,&nbsp;Sergey Babenyshev","doi":"10.1016/j.grets.2024.100133","DOIUrl":"10.1016/j.grets.2024.100133","url":null,"abstract":"<div><p>This paper aims to develop and validate a comprehensive framework for managing and assessing circular maturity in industrial ecosystems at the corporate level. Leveraging theoretical constructs related to principles, factors, strategies, and circular business models, the paper introduces a methodological approach for evaluating circular economy development within corporate industrial ecosystems. The framework is empirically tested and illustrated through a case study focusing on the corporate industrial ecosystems of Novolipetsk Steel (NLMK) and Metalloinvest in Russia for the period 2016–2020. The study reveals that both companies have made strides in integrating sustainable development goals (SDGs) related to the circular economy into their operational strategies, albeit with varying degrees of documentation and strategic focus. Content analysis of annual sustainability reports and estimation of the number of environmental, social and corporate governance (ESG) indicators and global reporting initiative (GRI) standards used by the industrial ecosystems further support these findings and suggest a growing interest in circular economy development, particularly within the NLMK ecosystem. The study finds that NLMK exhibits a more pronounced increase in circular economy practices compared to Metalloinvest, with a significant rise in the use of terms related to circularity in their reports, indicating strategic shifts towards these principles. The innovative aspect of this paper lies in its development of a multi-level methodological framework for circular maturity assessment, which incorporates both theoretical and empirical dimensions. This approach not only provides a structured way to measure and enhance circular economy practices but also bridges the gap between theory and practical application. The paper concludes by offering insights into the construction of systemic mechanisms for enhancing circular maturity at the corporate level, thereby contributing both to theoretical discourse and practical applications in the field of industrial sustainability. Key findings include the identification of specific areas where circular economy practices can be strengthened and the demonstration of how a systematic approach to circularity can lead to substantial improvements in sustainability outcomes.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100133"},"PeriodicalIF":0.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949736124000605/pdfft?md5=93428a3dcf14f85866f1ca1a8602d742&pid=1-s2.0-S2949736124000605-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142137406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The future of single-use plastics in life science: Sterile printing of PLA reduces greenhouse gas emissions by 80% and enables carbon neutrality","authors":"Lena Achleitner ,&nbsp;Anna-Carina Frank ,&nbsp;Osamah Mesef ,&nbsp;Peter Satzer","doi":"10.1016/j.grets.2024.100132","DOIUrl":"10.1016/j.grets.2024.100132","url":null,"abstract":"<div><p>The European Union’s Green Deal emphasizes life science and biotechnology as key drivers for achieving a circular economy. However, the prevalent use of non-sustainable single-use plastics derived from petrochemical sources in life science research and development contradicts this ecological goal. This study presents a viable alternative through on-site sterile 3D printing of single-use plastics using poly(lactic acid) (PLA). The sterile printing of PLA demonstrates a substantial reduction in CO<span><math><msub><mrow></mrow><mrow><mi>2eq</mi></mrow></msub></math></span> emissions per shake flask, decreasing from 260 g CO<span><math><msub><mrow></mrow><mrow><mi>2eq</mi></mrow></msub></math></span> to 145 g CO<span><math><msub><mrow></mrow><mrow><mi>2eq</mi></mrow></msub></math></span>. Suitability for cell culture was demonstrated for sterile printed PLA, autoclaved high-temperature PLA and for suspension cell cultures in shake flasks using CHO and insect cells as well as adherent Vero cell cultures in cell culture wells. Further optimization of sustainable shake flasks is achieved by utilizing recycled PLA, resulting in a remarkable reduction to 73 g CO<span><math><msub><mrow></mrow><mrow><mi>2eq</mi></mrow></msub></math></span>, constituting a 72% decrease in CO<span><math><msub><mrow></mrow><mrow><mi>2eq</mi></mrow></msub></math></span> emissions compared to conventional single-use plastics. Moreover, by employing geometric optimization to minimize material usage, emissions can be further reduced to 44 g CO<span><math><msub><mrow></mrow><mrow><mi>2eq</mi></mrow></msub></math></span>, representing an 83% reduction in CO<span><math><msub><mrow></mrow><mrow><mi>2eq</mi></mrow></msub></math></span> emissions. Anticipated advancements in PLA production suggest future carbon net negative PLA production, potentially achieving zero carbon emissions for single-use plastics using PLA. The exceptionally cost-effective nature of 3D printed single-use plastics, coupled with negligible capital costs for implementation, positions sterile 3D printing as a practical solution aligned with the 2030 Green Deal goals. Moreover, ongoing improvements in bioplastic production underscore the feasibility of meeting the 2050 targets of carbon neutrality for single-use plastics in life science research and development.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100132"},"PeriodicalIF":0.0,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949736124000599/pdfft?md5=eb34b874a3907f5df5aaccd15979d685&pid=1-s2.0-S2949736124000599-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142137407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Economic and strategic challenges in microgrid integration: Insights from operational dynamics and renewable energy potential","authors":"Anis Ur Rehman","doi":"10.1016/j.grets.2024.100130","DOIUrl":"10.1016/j.grets.2024.100130","url":null,"abstract":"<div><p>With the integration of a large number of microgrids in the power distribution network operation, economic and strategic challenges arise. To address these challenges, this research provides a comprehensive investigation into the operational, economic, and strategic dynamics of microgrids. Through careful data analysis, the study interprets the complications of microgrid responses to seasonal changes. It also investigates energy consumption patterns and production dynamics. The detailed analysis of microgrid configurations reveals the unique attributes and challenges of PV, wind, and hydropower microgrids. Moreover, the research explains the financial implications of microgrid integration, from setup costs to potential ROI. It is also examining the cooperative relationship between microgrids and conventional grids. Key findings highlight that solar microgrids contribute 3.2% to 5.3%, wind microgrids provide 5.9% to 7.4%, and hydropower microgrids contribute 24.4% of total power. Energy purchase peaks at 850,000 kWh in August and declines to 580,000 kWh in May. 170,000 kWh of energy is sold back to the grid in May. Moreover, the grid energy costs reduced from $0.178 kWh to $0.30 kWh. The total net present cost of the system is achieved at $37,880,023.33. Renewable energy production ranges from 480 kW to 2,300 kW, with a penetration level reaching 160%.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100130"},"PeriodicalIF":0.0,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949736124000575/pdfft?md5=b755c466875c89d778774f1f278005a9&pid=1-s2.0-S2949736124000575-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142039688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the surface roughness properties of fly ash-based geopolymer mortars with teff straw ash from the image analysis viewpoint","authors":"Tajebe Bezabih,&nbsp;David Sinkhonde,&nbsp;Derrick Mirindi","doi":"10.1016/j.grets.2024.100127","DOIUrl":"10.1016/j.grets.2024.100127","url":null,"abstract":"<div><p>Fly ash (FA)-based geopolymer mortar is being considered for sustainability since it enjoys peculiar properties such as high mechanical properties and environmental benefits. However, the high curing temperatures of FA-based geopolymer mortar play a complex role in its outstanding mechanical behaviour thereby requiring other precursors, such as teff straw ash (TSA). In this study, we develop surface roughness properties of FA-based geopolymer mortars with TSA, where the ambient temperature is used for curing. The surface roughness characteristics of the FA-based geopolymer mortars with TSA exploit the surface roughness simulations from Gwyddion and the approach is demonstrated here in the contexts of spatial, hybrid and amplitude roughness parameters. The results show that some roughness parameters, including <span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>q</mi></mrow></msub></math></span> values for FA-based geopolymer mortars with TSA, exhibit significant decreasing trends as the TSA contents increase. However, in comparison with the CA specimens (ambient temperature curing) and CE specimens (elevated temperature curing), the trends among the majority of the roughness parameters for FA-based geopolymer mortars with TSA turn out not to be very good probably due to changes in the internal structures of the mortars. Moreover, without the kurtosis values (R<span><math><msub><mrow></mrow><mrow><mi>ku</mi></mrow></msub></math></span>) of less than 3, it is easy to demonstrate that all the profiles of the investigated specimens reflect sharp valleys and peaks. The findings of surface roughness properties allow one to grasp the roughness parameters of FA-based geopolymer mortars with TSA. The approach for generating surface roughness properties of FA-based geopolymer mortars with TSA offers significant quantitative and qualitative information required for the bonding of mortar layers.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100127"},"PeriodicalIF":0.0,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S294973612400054X/pdfft?md5=9dd98acd45f8bd17ba50a682109a5bc2&pid=1-s2.0-S294973612400054X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142049678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment and ranking of different vehicles carbon footprint: A comparative study utilizing entropy and TOPSIS methodologies","authors":"Farzan Ashraf ,&nbsp;Azhar Equbal ,&nbsp;Osama Khan ,&nbsp;Zeinebou Yahya ,&nbsp;Aiyeshah Alhodaib ,&nbsp;Mohd Parvez ,&nbsp;Shadab Ahmad","doi":"10.1016/j.grets.2024.100128","DOIUrl":"10.1016/j.grets.2024.100128","url":null,"abstract":"<div><p>The world is currently grappling with the detrimental effects of escalating pollution stemming from exhaust gases emitted by vehicles, exacerbating environmental degradation and posing severe health risks. To mitigate this crisis, leveraging appropriate technologies capable of curbing emissions is imperative. A recent study undertook a comprehensive assessment, comparing the carbon footprint of various vehicles, considering parameters such as emissions in battery manufacturing and fuel consumption. Employing entropy and TOPSIS methodology, the analysis assigned weights and rankings to these criteria and vehicle alternatives. Results indicated that battery manufacturing emissions carried the most significant weight (81.91%), followed by emissions from fuel consumption (15.99%). Hybrid vehicles emerged as the most favorable alternative, closely followed by biodiesel, exhibiting the lowest carbon emissions including CO, CO₂, and UBHC. This study offers invaluable insights for future decision-makers in the transportation sector, facilitating informed choices towards adopting environmentally sustainable vehicles, thereby contributing to a greener and healthier future.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100128"},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949736124000551/pdfft?md5=24c0b7eb559deaa8ade95aad38882a3e&pid=1-s2.0-S2949736124000551-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142039686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kinetics, thermodynamics and characterization of neem seeds (Azadirachta indica) oil extraction: Extensive study of the processes","authors":"Chinedu Matthew Agu ,&nbsp;Charles C. Orakwue ,&nbsp;Onuabuchi N. Ani ,&nbsp;Mmesoma P. Chinedu","doi":"10.1016/j.grets.2024.100126","DOIUrl":"10.1016/j.grets.2024.100126","url":null,"abstract":"<div><p>Kinetic and thermodynamics studies and the effect of process parameters such as seed average particle size, extraction time and temperature on the extraction of <em>neem</em> seed oil were investigated. Solvent extraction method was used with n-hexane as the solvent. The plot of percentage yield versus time showed that percentage yield increased with increase in time and temperature and decrease in seed average particle size. The highest percentage yield of 54.14% was obtained at optimum conditions of 0.5 mm average particle size, 55 °C temperature and 150 min extraction time. Kinetic study showed that pseudo second order model and Elovich’s model both described the extraction of <em>neem</em> seed oil based on least RMS and SD values. However, pseudo 2nd order gave highest R² value and calculated oil yield at aforementioned optimum conditions. Therefore, pseudo 2nd order model was chosen as best kinetic model for the process. Hyperbolic model, conversely gave no fit to the process. Thermodynamics parameters results <span><math><mi>Δ</mi></math></span>H (428.11 KJ/mol), <span><math><mi>Δ</mi></math></span>S (1.82 KJ/mol), and <span><math><mi>Δ</mi></math></span>G (-168.63 KJ/mol) for extracting oil from <em>neem</em> seed indicate that the process was endothermic, irreversible and spontaneous, respectively. The physiochemical properties show that <em>neem</em> oil has potential in biodiesel application. Fatty acid composition showed that <em>neem</em> seed oil is saturated.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100126"},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949736124000538/pdfft?md5=576fd52c7e7caf5ddd6b934dc078fdff&pid=1-s2.0-S2949736124000538-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142039685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of Turkey’s environmental performance with Eastern European countries according to international EPI 2022 data","authors":"Mehmet Karahan ,&nbsp;Zafer Yıldırım ,&nbsp;Turgay Yıldırım","doi":"10.1016/j.grets.2024.100116","DOIUrl":"10.1016/j.grets.2024.100116","url":null,"abstract":"<div><p>In order to effectively address environmental issues, it is important for governments to identify the problems causing environmental pollution within their scope and to develop appropriate solution policies. In order to identify environmental problems and develop necessary policies, it is necessary to consider the environmental performance of countries. Therefore, measuring the environmental performance of countries is of great importance. One of the prominent indices in measuring environmental performance today is the Environmental Performance Index (EPI) developed by Yale University. The main purpose of EPI is to quantitatively measure and compare the environmental performances of countries in order to monitor their progress in environmental sustainability. As of 2022, EPI consists of three main criteria: climate change, environmental health, and ecosystem vitality. In this study, Turkey’s environmental performance was evaluated using the Entropy-based PROMETHEE method with international EPI 2022 data. Subsequently, the environmental performances of Turkey and other Eastern European countries were compared in terms of criterion superiority to determine their strengths and weaknesses. In this context, various sub-criteria were analyzed under main criteria such as climate change mitigation, air quality, sanitation and drinking water, heavy metals, waste management, biodiversity and habitat, ecosystem services, fisheries, acid rain, agriculture, and water resources. As a result of the analysis conducted as of 2022, it emerged that Turkey generally exhibited weak environmental performance among Eastern European countries and there is a need for improvement in each criterion. Giving priority to criteria such as Climate Change Mitigation, Sanitation and Drinking Water, Biodiversity and Habitat, Fisheries, and Acid Rain, in which Turkey obtained the lowest scores in the ranking, would be a more strategic approach.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100116"},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949736124000435/pdfft?md5=ddd6e2852eec60a9d2983143bdc68e8e&pid=1-s2.0-S2949736124000435-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141853453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strategies for economic sustainability: An empirical study on Muri, Mura, and Muda in the readymade garment sector","authors":"Md. Imran Hosen ,&nbsp;Saifur Rahman Tushar ,&nbsp;Md. Fahim Bin Alam ,&nbsp;Md. Syduzzaman","doi":"10.1016/j.grets.2024.100115","DOIUrl":"10.1016/j.grets.2024.100115","url":null,"abstract":"<div><p>Achieving economic sustainability in the garment manufacturing industry necessitates the implementation of several strategic measures. Basic strategies like adoption of automation, utilization of sustainable energy sources, diversification of markets and products, enhancement of supply chain resilience, etc. lead to the attainment of economic sustainability in the garment manufacturing industry. Additionally, the underlying component of these strategies for ensuring economic sustainability is the minimization of process waste, which can be effectively achieved through the application of lean manufacturing principles, specifically targeting the elimination of Muri, Mura, and Muda. This strategic commitment ensures business longevity amid evolving industrial landscapes, fostering innovation and competitiveness. In emerging economies like Bangladesh, pinpointing precise approaches to reduce waste is vital. This study explores into Muri, Mura, and Muda in the RMG sector, utilizing Pareto analysis, Fuzzy theory, Total Interpretative Structural Modeling (TISM), and Matriced’ Impacts Cruoses Multiplication Applique an un Classement (MICMAC) analysis. After the initial identification of 21 (twenty) factors, Pareto analysis pinpointed the primary 16 (sixteen) factors. Subsequently, these factors underwent analysis through fuzzy TISM and fuzzy MICMAC. The results highlighted “Demand variation”, “Supplier variation”, “Workforce variation”, and “Energy supply variation” as the most crucial factors. The novelty of this study lies in exploring Muri and Mura factors in correlation with Muda employing the existing hybrid and effective methodology that combines Pareto analysis, Fuzzy MICMAC, and Fuzzy TISM methodologies. It offers fresh perspectives on their significance for economic sustainability in the garment sector. Prior research has not explored this integrated approach to reduce process waste by addressing Muri and Mura factors in emerging economies’ garment industries. This research is poised to significantly impact waste reduction in the RMG sector, enhancing competitiveness, appealing to environmentally conscious consumers, and ensuring industry standards adherence essential for sustained success. The contribution of this research is grounded in helping the practitioners and entrepreneurs in developing nations make strategic choices that will lead to the RMG sector’s resilience and, ultimately, economic sustainability.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100115"},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949736124000423/pdfft?md5=3212e4191f42cac53aaac91b4ab3558f&pid=1-s2.0-S2949736124000423-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141852933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel higher rotational speed maintaining control for wind power generation systems under unstable wind conditions","authors":"Hidehito Matayoshi ,&nbsp;Masaya Mitsuhashi ,&nbsp;Ryoma Onoe ,&nbsp;Toshimitsu Morizane ,&nbsp;Masahiro Furukakoi ,&nbsp;Tomonobu Senjyu","doi":"10.1016/j.grets.2024.100113","DOIUrl":"10.1016/j.grets.2024.100113","url":null,"abstract":"<div><p>This study proposes the Higher Rotational Speed Maintaining (HRSM) control algorithm that is suitable for large wind speed fluctuations. One of the challenges faced by wind generators is operating with significant wind speed oscillations. A wind generator with a large moment of inertia increases the time constant in rotational speed control and delays the tracking of the optimal operating point. This delay could reduce generated power by up to 40% or more. There are numerous regions in Japan’s inland areas where average wind speeds exceed 6.5 m/s. However, frequent fluctuations in wind speeds make wind power generation challenging. Therefore, this paper proposes a control algorithm suitable for wind turbines operating under unstable wind conditions. Higher rotational speeds are required to convert sudden high wind speeds into higher power output, especially when wind speed oscillations are large. Hence, the proposed algorithm focuses on maintaining the rotational speed during periods of unstable wind conditions to improve generation efficiency. The effectiveness of the proposed control method for wind turbines is verified through numerical simulation results. The novel control algorithm aims to promote the spread of wind turbines in areas with unstable wind conditions by overcoming these disadvantages.</p></div>","PeriodicalId":100598,"journal":{"name":"Green Technologies and Sustainability","volume":"3 1","pages":"Article 100113"},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S294973612400040X/pdfft?md5=6c63d92516ceccedd445e4ed196301ac&pid=1-s2.0-S294973612400040X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141838841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}