Sustainable Energy Technologies and Assessments最新文献_第9页

Extrusion allows optimizing the eucalyptus bark and sugarcane straw for energy generation with the addition of RDF (Refuse-Derived Fuel)

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104155

Robmilson Simões Gundim , Maria Cecíllia Ramos de Araújo Veloso , João Otávio Poletto Tomeleri , Gabriela Tami Nakashima , Gabriela Bertoni Belini , Alan Vitor Galmacci da Silva , Edilene de Cássia Dutra Nunes , Fabio Minoru Yamaji

An alternative for the disposal of solid and agricultural waste is their use for energy. But some difficulties still need to be overcome due to their characteristics, such as low density and heterogeneity. This study aimed to test the extrusion process to produce composites of Refuse-Derived Fuel (RDF) mixed with eucalyptus bark and sugarcane straw, for energy purpose. Six treatments were produced in a single screw extruder with replacement of 10, 25, and 50 % of the RDF in the biomass. The physical, chemical, and energetic characteristics of the treatments were assessed. The extrusion process helped to enhance essential factors for fuel viability. Composite material (RDF + biomass) reached a density 2.5 times greater than in natura and moisture content decreased up to 82 %. The HHV of the composites was greater than that of the biomass. There were decreases in the composite levels of harmful elements such as chlorine and calcium. Compared with the raw materials, composite properties improved and met the standards analyzed. The results indicate that extrusion process proved to be adequate for composite production. RDF mixed with biomass generates composites with potential use for fuel production. These composites allowing formulation adaptations according to material supply and application criteria.

{"title":"Extrusion allows optimizing the eucalyptus bark and sugarcane straw for energy generation with the addition of RDF (Refuse-Derived Fuel)","authors":"Robmilson Simões Gundim , Maria Cecíllia Ramos de Araújo Veloso , João Otávio Poletto Tomeleri , Gabriela Tami Nakashima , Gabriela Bertoni Belini , Alan Vitor Galmacci da Silva , Edilene de Cássia Dutra Nunes , Fabio Minoru Yamaji","doi":"10.1016/j.seta.2024.104155","DOIUrl":"10.1016/j.seta.2024.104155","url":null,"abstract":"<div><div>An alternative for the disposal of solid and agricultural waste is their use for energy. But some difficulties still need to be overcome due to their characteristics, such as low density and heterogeneity. This study aimed to test the extrusion process to produce composites of Refuse-Derived Fuel (RDF) mixed with eucalyptus bark and sugarcane straw, for energy purpose. Six treatments were produced in a single screw extruder with replacement of 10, 25, and 50 % of the RDF in the biomass. The physical, chemical, and energetic characteristics of the treatments were assessed. The extrusion process helped to enhance essential factors for fuel viability. Composite material (RDF + biomass) reached a density 2.5 times greater than in natura and moisture content decreased up to 82 %. The HHV of the composites was greater than that of the biomass. There were decreases in the composite levels of harmful elements such as chlorine and calcium. Compared with the raw materials, composite properties improved and met the standards analyzed. The results indicate that extrusion process proved to be adequate for composite production. RDF mixed with biomass generates composites with potential use for fuel production. These composites allowing formulation adaptations according to material supply and application criteria.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"73 ","pages":"Article 104155"},"PeriodicalIF":7.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trends and determinates of hydrogen energy acceptance, or adoption research: A review of two decades of research

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104159

Flavio Odoi-Yorke , Ephraim Bonah Agyekum , Farhan Lafta Rashid , John Eshun Davis , Hussein Togun

A promising technological solution to the pressing problem of decarbonizing the global energy system is clean hydrogen. Therefore, understanding how the public feel about hydrogen is essential to its success, just like with any new technology. This paper offers the findings of a bibliometric and systematic review that examined the literature on the variables affecting the acceptance of hydrogen energy. A total of 108 documents published from 2003 to 2023 were used for the bibliometric analysis using the Biblioshiny software in the R package. The study shows a steady growth in hydrogen energy acceptance research, with 350 authors and a 12.96% international co-authorship rate. The literature on hydrogen acceptance reveals that limited public awareness, perceived usefulness, safety, cost, and health benefits influence one’s acceptance. Acceptance of hydrogen was also found to be highly dependent on financial policies, industry support for climate protection, government confidence, and efficient communication and engagement. Japan, Germany, and China dominate hydrogen energy research globally, while some European countries also contribute significantly. However, regional acceptance gaps exist in Africa and South America.

{"title":"Trends and determinates of hydrogen energy acceptance, or adoption research: A review of two decades of research","authors":"Flavio Odoi-Yorke , Ephraim Bonah Agyekum , Farhan Lafta Rashid , John Eshun Davis , Hussein Togun","doi":"10.1016/j.seta.2024.104159","DOIUrl":"10.1016/j.seta.2024.104159","url":null,"abstract":"<div><div>A promising technological solution to the pressing problem of decarbonizing the global energy system is clean hydrogen. Therefore, understanding how the public feel about hydrogen is essential to its success, just like with any new technology. This paper offers the findings of a bibliometric and systematic review that examined the literature on the variables affecting the acceptance of hydrogen energy. A total of 108 documents published from 2003 to 2023 were used for the bibliometric analysis using the Biblioshiny software in the R package. The study shows a steady growth in hydrogen energy acceptance research, with 350 authors and a 12.96% international co-authorship rate. The literature on hydrogen acceptance reveals that limited public awareness, perceived usefulness, safety, cost, and health benefits influence one’s acceptance. Acceptance of hydrogen was also found to be highly dependent on financial policies, industry support for climate protection, government confidence, and efficient communication and engagement. Japan, Germany, and China dominate hydrogen energy research globally, while some European countries also contribute significantly. However, regional acceptance gaps exist in Africa and South America.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"73 ","pages":"Article 104159"},"PeriodicalIF":7.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical analysis of flow-induced vibration of vanes in a giant Francis turbine

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104164

Guanzhe Cui , Yicheng Cao , Yan Yan , Wenquan Wang

Francis turbines play a crucial role in converting hydropower into electricity, addressing concerns associated with traditional energy sources. Flow instabilities around stay and guide vanes contribute to turbine vibration and significantly reduce energy harvesting efficiency. This study utilizes a highly accurate spectral element method and fluid–structure interaction algorithm to investigate the physical mechanisms behind vortex-induced vibrational phenomena around the cascades of a high-head prototype Francis turbine. The results reveal that favorable pressure gradients occur on the suction side of the guide vanes and stretch incoming small-scale vortices into elongated vortical structures that cause high-amplitude low-frequency fluctuation (f ≤ 10 Hz). Conversely, adverse pressure gradients on the pressure side induce numerous stochastic flow separations and small-scale vortices, resulting in a wide range of low-amplitude high-frequency pulsations. Additionally, the guide vanes exhibit higher magnitudes and vibrational amplitudes of the force coefficients compared to the stay vanes. Due to the substantial pressure difference between the upstream and downstream of the guide vanes, the operating condition with the high head and small attack angle demonstrates the most robust vibrational characteristics. The likelihood of resonance occurring in both vane and vaneless space is reduced since the frequencies of force coefficients concentrate at f ≤ 40 Hz, which are lower than the cascade natural frequencies. However, vortex shedding at the trailing edge of the guide vanes with a wide range of deterministic and irregular frequencies contributes to the highest amplitude of pressure pulsation, reaching 0.17 with a frequency of 230 Hz, potentially inducing turbine resonance. The study provides an in-depth explanation of the hydrodynamic characteristics of the cascades and thoroughly explains the physical mechanisms behind vortex-induced vibration in Francis turbines.

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引用次数: 0

Heat extraction evaluation of series/parallel U-shaped wells in middle-deep geothermal exploitation

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104098

Tianduoyi Wang , Dong Xiao , Keliu Wu , Qingyuan Zhu , Zhangxin Chen

This paper introduces a novel physical model for series/parallel U-shaped wells for the first time and develops a new method for solving fluid temperature that is suitable for medium-deep U-shaped closed-loop geothermal system (U-CLGS). Additionally, an economic evaluation model is presented to compare the economic feasibility of single-pipe with series/parallel geothermal systems. The research findings indicate that: (1) The temperature calculation model demonstrates high accuracy, with the difference between its prediction results and experimental data being less than 3 %, confirming the reliability of the predictions. (2) Regarding economic efficiency, the unit investment for the parallel configuration is the highest, followed by the single-pipe, while the series-pipes configuration has the lowest investment. The economic benefit of parallel-pipes U-CLGS is 5.86 % greater than that of single-pipe U-CLGS. Under both technical and economic operational conditions, the parallel configuration is recommended. (3) In terms of operating parameters, optimizing the fluid inlet temperature is more critical than adjusting the circulating flow rate. According to the economic evaluation diagram constructed for the single-pipe U-shaped heat exchanger, the ideal operating condition is an inlet temperature of 5 °C and a flow rate of 86.24 m³/h. This research provides a theoretical foundation for engineers working with medium-deep U-CLGS.

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引用次数: 0

Towards clean energy independence: Assessing MENA region hybrid PV-wind solutions for green hydrogen generation and storage and 24/7 power production

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104158

Ahmed A. Hassan , Mohamed M. Awad , Mohamed Nasser

Amidst the global pursuit of clean energy solutions, the current study explores the pivotal role of green hydrogen in achieving clean energy independence. Focusing on the MENA region, where renewable energy possibility is abundant, our study investigates the feasibility of harnessing the synergy between PV-Wind power generation systems. These systems not only aim to provide sustainable electricity to off-grid communities without access to the grid but also prioritize green hydrogen production via electrolyzers and fuel cells for consistent 24/7 power generation and surplus energy exportation. Furthermore, this investigation underscores the crucial role of green hydrogen, offering a viable solution to bridge intermittent renewable energy supply gaps and enable continuous power availability. MATLAB/Simulink software has been used to model the operation of different system components under climate conditions in various cities in the Middle East. The results indicate that the maximum total system efficiency is about 36.71%, PEMEC efficiency is 86.5 %, and PEMFC efficiency is 49.2%. The annual hydrogen production varies from 103.7 to 216 tons according to the system configuration and climatic conditions. The LCOE is between 0.112 and 0.1867 $/kWh with up to 6 Mega-ton of CO₂ emission reduction.

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引用次数: 0

An integration-monitoring approach to the development of sustainable technology and innovation: The case of University Technology Transfer Offices

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104118

Hannia Gonzalez-Urango , Enrique Mu , Carmen Corona-Sobrino

Using an integration-monitoring theoretical framework, which assesses the alignment of internal and external perspectives along with performance evaluation, this research demonstrates how suitable political, regulatory, and societal contexts, effective stakeholder engagement, and an active role for middle managers (even in the absence of a clear mandate) are essential for embedding sustainable goals in the development and public transfer of sustainable technologies and innovation. The proposed integration-monitoring framework is applied to the case of university Technology Transfer Offices (TTOs) to explore how they can strengthen sustainability-oriented innovation systems. Additionally, it examines the role of TTOs in promoting economic development and commercializing new technologies and innovations while integrating socio-environmental sustainability dimensions. Two university TTOs, one in the USA and one in Spain, were studied using a two-level analysis. This analysis reflects on the understanding and integration of social and environmental sustainability in their activities and evaluates a framework for monitoring their sustainability-oriented efforts. Importantly, this study highlights a fundamental lack of assessment and performance evaluation indicators in the development of sustainable technologies, even in the case of institutions that have fully embraced sustainable innovation goals. The proposed framework and findings from this research can extend beyond the TTO context, providing insights applicable to other organizations tasked with the development and public diffusion of sustainable innovative technologies.

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引用次数: 0

In-situ sampling of solid recovered fuel and recycling ashes for the production of sustainable binders

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104139

Chih-Hung Lin , Manjula Natesan , Di-Wen Wang , Ying-Chu Chen

Increasing waste generation and energy shortages are fueling interest in alternative fuels such as solid recovered fuels (SRFs), but limited studies address their compositional properties and potential for reuse in construction. This study involved in-situ sampling at SRF production/utilization facilities in Taiwan, with five sites substituting 30 %–80 % of their fossil fuels use with SRFs derive mainly from plastics, textiles, and waste wood. The net calorific values of SRFs ranged from 18.42 MJ/kg to 29.11 MJ/kg with textile-derived SRFs containing higher sulfur (3.23 %) and chlorine (0.03 %) levels. After incineration, SRF ashes showed increased concentrations of metals, notably Ca (0.09–30.2 %), followed by Si (4.17–18.95 %), and Fe (1.15–5.86 %). Metals such as aluminum and iron were found to be more concentrated after incineration. The compressive strength of ash-based binders increased with curing time, achieving 291 kgf/cm² at 30 % SRF ash content after 14 days. The study suggests that replacing approximately 10 % of cement with SRF ash and curing for 7 days optimizes viscosity, permeability, and compressive strength. These findings support the circular economy by repurposing SRF ashes for civil and environmental applications.

{"title":"In-situ sampling of solid recovered fuel and recycling ashes for the production of sustainable binders","authors":"Chih-Hung Lin , Manjula Natesan , Di-Wen Wang , Ying-Chu Chen","doi":"10.1016/j.seta.2024.104139","DOIUrl":"10.1016/j.seta.2024.104139","url":null,"abstract":"<div><div>Increasing waste generation and energy shortages are fueling interest in alternative fuels such as solid recovered fuels (SRFs), but limited studies address their compositional properties and potential for reuse in construction. This study involved in-situ sampling at SRF production/utilization facilities in Taiwan, with five sites substituting 30 %–80 % of their fossil fuels use with SRFs derive mainly from plastics, textiles, and waste wood. The net calorific values of SRFs ranged from 18.42 MJ/kg to 29.11 MJ/kg with textile-derived SRFs containing higher sulfur (3.23 %) and chlorine (0.03 %) levels. After incineration, SRF ashes showed increased concentrations of metals, notably Ca (0.09–30.2 %), followed by Si (4.17–18.95 %), and Fe (1.15–5.86 %). Metals such as aluminum and iron were found to be more concentrated after incineration. The compressive strength of ash-based binders increased with curing time, achieving 291 kgf/cm<sup>2</sup> at 30 % SRF ash content after 14 days. The study suggests that replacing approximately 10 % of cement with SRF ash and curing for 7 days optimizes viscosity, permeability, and compressive strength. These findings support the circular economy by repurposing SRF ashes for civil and environmental applications.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"73 ","pages":"Article 104139"},"PeriodicalIF":7.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic effect of torrefaction and gasification temperatures on hydrogen-rich syngas quality from steam gasification of cornstalk-derived biochar

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104121

Nanhang Dong, Zishan Zhang, Jiacheng Wang, Xingshuai Wang, Yang Yu, Qicheng Chen

Steam gasification of cornstalk and torrefied biochar was conducted in a fixed bed chamber to investigate the quantitative and qualitative characteristics of hydrogen-rich syngas. Emphasis was placed on H₂ and CO production, considering the varied temperatures of torrefaction and gasification and their synergetic effects. The study reports the production of syngas and tar, along with calculations of calorific value and carbon conversion rate. Experimental results indicated that the H₂ content, syngas production, and carbon conversion rate from cornstalk gasification improved with increasing reaction temperature. The carbonization level of cornstalk through torrefaction pretreatment was examined. Subsequently, the analysis of syngas composition from torrefied biochar gasification revealed that the maximum H₂ content was identified at the highest torrefaction temperature (290 °C), not the highest gasification temperature (950 °C). Conversely, the maximum production of syngas and carbon conversion rate were obtained at the highest gasification temperature, not the highest torrefaction temperature. Furthermore, the calorific value of syngas decreased with lower CH₄ + C_xH_y content under higher torrefaction and gasification temperatures. In conclusion, achieving a balance between H₂ content and gas production can be facilitated by considering torrefaction pretreatment in the steam gasification process.

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引用次数: 0

Assessing carbon emissions from urban road transport through composite framework

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104151

Xinguang Li, Tong Lv, Dayi Qu

The assessment of carbon emissions from urban transportation is crucial for energy transition and combating climate change. Accurate assessments facilitate carbon emission control. However, current assessments of transportation carbon emissions are hindered by unquantified driving factors and unclear, complex relationships between system variables and subsystems related to passenger transportation carbon emissions. To improve assessment accuracy, a composite assessment framework for transportation carbon emissions is proposed. The extended STIRPAT model is utilized to quantify the driving factors of urban passenger transportation carbon emissions, upon which the STIRPAT-SD carbon emission assessment model is constructed. This model was applied to assess passenger transportation carbon emissions in China, considering technology strategy, transportation structure strategy, and management strategy. The results indicate that passenger transportation carbon emissions are positively influenced by total population, energy intensity, GDP per capita, public transportation sharing rate, and urban passenger vehicle ownership, in that order. The reduction rates achieved by the three optimization strategies are 20%, 23%, and 9%, respectively. The transportation structure optimization strategy is the most effective in reducing carbon emissions. This assessment framework can effectively evaluate or predict the implementation of policies and provide a reference for low-carbon transportation development.

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引用次数: 0

Drivers assessment of photovoltaic waste recycling and reuse in China: A rough-based hierarchical DEMATEL approach

IF 7.1 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments

Pub Date : 2025-01-01 DOI: 10.1016/j.seta.2024.104149

Jing Li , Siran Fang , Nan Wang , Xingya Zhang , Hong Fang

The key drivers for photovoltaic (PV) waste recycling and reuse must be identified for addressing the anticipated challenges posed by the increasing volume of PV waste in China. This study identifies 25 drivers and examines their interrelationships using an extended hierarchical decision-making trial and evaluation laboratory (DEMATEL) method. The drivers are categorized into six groups: economic and marketing, technology, infrastructure, policy and regulation, environment, and society. A modified approach integrates the strengths of the extended hierarchical DEMATEL method for analyzing cause-effect relationships in complex systems with rough set theory to accommodate imprecise assessments and prioritize these drivers. The analysis highlights that breakthrough technological advancements, research and development in PV recycling technologies, design innovation in PV module manufacturing, implementing strict regulations and policies, business model for collection scheme, fire risk prevention, reduction of energy payback time, stakeholder consensus and cooperation, and mitigation of health risks are the critical drivers shaping PV waste management strategies in China. These findings offer actionable insights for policymakers and PV enterprises to enhance sustainable waste management practices.

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引用次数: 0