Cleaner Energy Systems最新文献

{"title":"Comparative operational carbon footprints of a vehicle in Brazil: Electric, ethanol, and gasoline","authors":"João Marcelo Fernandes Gualberto Galiza ,&nbsp;Silvia Guillén-Lambea ,&nbsp;Monica Carvalho","doi":"10.1016/j.cles.2025.100194","DOIUrl":"10.1016/j.cles.2025.100194","url":null,"abstract":"<div><div>This study quantifies the operational carbon footprint of the Renault Kwid E-Tech (electric vehicle) and Renault Kwid Intense <em>flex</em> (gasoline and ethanol internal combustion engine vehicle) under a Well-to-Wheel approach within the Brazilian context. With a functional unit of 100,000 km, this analysis evaluates greenhouse gas (GHG) emissions associated with fuel consumption and considers different electric mixes across Brazilian regions, along with the periodic maintenance of each vehicle type. The results reveal significant environmental benefits in regions such as the Northeast, where renewable energy sources predominate, reducing the carbon footprint of the electric model, with a carbon footprint of 0.071 kg CO₂-eq/kWh. By contrast, the higher carbon intensity of the South’s electricity mix reliant on coal, with a carbon footprint of 0.281 kg CO₂-eq/kWh, presents limitations in achieving emissions reductions with electric vehicles. Ethanol, a renewable biofuel in the Brazilian market, demonstrated a 46 % reduction in GHG emissions compared to gasoline. This study contributes to the sustainable mobility discourse, highlighting the critical role of regional energy sources, fuel choices, and sustainable production practices in emissions outcome. These insights support the development of policies encouraging cleaner energy matrices and biofuel use, contributing to Brazil's emissions reduction goals.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"12 ","pages":"Article 100194"},"PeriodicalIF":0.0,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Reducing energy consumption in a factory and providing an upgraded energy system to improve energy performance” [Cleaner Energy Systems, Volume 8, August 2024, 100124]","authors":"Armin Tayefeh,&nbsp;Alireza Aslani,&nbsp;Rahim Zahedi,&nbsp;Hossein Yousefi","doi":"10.1016/j.cles.2025.100193","DOIUrl":"10.1016/j.cles.2025.100193","url":null,"abstract":"","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"11 ","pages":"Article 100193"},"PeriodicalIF":0.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retraction notice to “Forecasting Solar Energy generation in the Mediterranean Region up to 2030-2050 Using Convolutional Neural Networks (CNN)” [Cleaner Energy Systems 10 (2025) 100167]","authors":"Mahmood Abdoos ,&nbsp;Hamidreza Rashidi ,&nbsp;Pourya Esmaeili ,&nbsp;Hossein Yousefi ,&nbsp;Mohammad Hossein Jahangir","doi":"10.1016/j.cles.2025.100192","DOIUrl":"10.1016/j.cles.2025.100192","url":null,"abstract":"<div><div>This article has been retracted: please see Elsevier Policy on Article Withdrawal (<span><span>https://www.elsevier.com/about/policies/article-withdrawal</span><svg><path></path></svg></span>).</div><div>This article has been retracted at the request of the Editor-in-Chief.</div><div>Post publication the editor found that several citations were added to this paper which are not relevant to the topic of the paper. In addition, it was found that the data utilized in the study were poorly presented, referenced, and described, making it difficult for readers to fully understand and evaluate the findings. The method section was also found to be insufficiently clear, lacking the necessary detail required for replication or validation of the results.</div><div>An Expression of Concern was appended to the paper whilst the authors were given a chance to write a revised version of their original article. Despite substantial efforts by the authors, there remain significant unresolved issues that compromise the integrity and reproducibility of the study.</div><div>Subsequent evaluation of the revised paper has concluded that it does not advance understanding of the topic. The changes needed were judged to exceed the threshold that could be corrected via a Corrigendum and therefore necessitated retraction. This retraction supersedes the Expression of Concern.</div><div>The paper will be resubmitted, and additional measures will be implemented to ensure that the methodologies described, and the source of the data are clearer. References will also be aligned with the context of the article. Once the resubmitted paper undergoes review and, if accepted for publication, a link to the new article will be provided here for reference.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"11 ","pages":"Article 100192"},"PeriodicalIF":0.0,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying heat demand of China’s manufacturing by sub-sectors and temperature zones: a four-step accounting method","authors":"Eugene Haochen Yu ,&nbsp;Yuan Yuan ,&nbsp;Chinhao Chong ,&nbsp;Maximilian Arras ,&nbsp;Linwei Ma ,&nbsp;Zheng Li ,&nbsp;Weidou Ni","doi":"10.1016/j.cles.2025.100190","DOIUrl":"10.1016/j.cles.2025.100190","url":null,"abstract":"<div><div>In 2020, the heat demand drove 54 % of the energy-related carbon emissions (ERCEs) in China’s industry, and the majority of the heat demand was in manufacturing. Due to the scale, numerous sub-sectors, and complex production processes of the manufacturing industry, together with insufficient data availability, a lack of comprehensive data for heat demand differentiating sub-sectors and temperature zones still exists. This study developed a four-step accounting method to fill this gap, including the selection of sub-sectors, identification of typical production processes, estimation of heat demand by temperature zones for each process, and calculation of the total heat demand by sub-sectors and temperature zones. 9 manufacturing sub-sectors were selected to estimate the heat demand between 0 and 1800 °C, and 16 production processes were identified to differentiate the heat demand by temperature zones. The results indicated that the temperature zones of 1601–1800 °C, 0–200 °C and 801–1000 °C account for 28.0 %, 20.4 % and 19.6 % of the total heat demand, respectively. Meanwhile, the high temperature zone was dominated by ferrous metals and non-metallics, the middle temperature zone was dominated by chemicals, ferrous metals, and non-ferrous metals, and the low temperature zone was diverse among all sub-sectors.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"11 ","pages":"Article 100190"},"PeriodicalIF":0.0,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regional environmental comparison of electrification and ethanol blends in light vehicles","authors":"Fernando Fusco Rovai ,&nbsp;Carlos Eduardo Keutenedjian Mady","doi":"10.1016/j.cles.2025.100189","DOIUrl":"10.1016/j.cles.2025.100189","url":null,"abstract":"<div><div>This study compares the decarbonization of five light-vehicle types with life cycle assessment from vehicle production up to 200,000 km of use (driving impact for urban and highway cycles). The comparison to reduce fuel carbon intensity was between fleet electrification and conventional internal combustion vehicles running on more biofuel. Furthermore, the scope is to evaluate ethanol as a transitional fuel for decarbonization for future arrangements in modal transportation. The analyses were conducted in four countries with policies of vehicle decarbonization: China, the United States of America and the European Union, and Brazil. These multiple variables-based analyses help to understand specific technological transitions and to instruct optimized regional decarbonizing solutions. Considering the regional carbon intensity of electricity generation and gasoline-ethanol fuel blend, these innovative evaluations estimate the ethanol content to be added to each region's fuel to achieve the same carbon emission mitigation of vehicle electrification with conventional non-electrified vehicles. The CO₂e mitigation of the analyzed hybrid electric vehicle is attainable by adding from 9 to 76 % ethanol v/v to the fuel. The battery electric vehicle C_O2e mitigation could demand lower fuel intensity than ethanol for conventional smaller vehicles, confirming the most probable electrification in these categories, with less challenging CO₂e mitigation with biofuels for larger vehicles. The innovative cost estimation of avoided CO₂e when replacing a conventional with a battery electric vehicle in Brazil resulted in penalties from 334 to 6539 US$ per avoided ton of CO2e, with the higher costs for higher vehicles, values between 16 and 307 times more expensive than decarbonization through carbon credits from sustainable activities in Brazil (CBIOS). The replacement of a conventional by a hybrid vehicle in urban use is the only option analyzed that resulted in cost saving of 63 US$ per mitigated ton of CO₂e.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"11 ","pages":"Article 100189"},"PeriodicalIF":0.0,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilizing fruit wastes as a sustainable feedstock for bioethanol production: A review","authors":"Shedrack Thomas Mgeni ,&nbsp;Herieth Rhodes Mero ,&nbsp;Lewis Atugonza Mtashobya ,&nbsp;Jovine Kamuhabwa Emmanuel","doi":"10.1016/j.cles.2025.100188","DOIUrl":"10.1016/j.cles.2025.100188","url":null,"abstract":"<div><div>This present review is significant as it aligns with the global push to expand energy sources and address climate change and air pollution. It explores how fruit waste can be utilized as a feedstock for bioethanol production, a key renewable fuel. To conduct a thorough literature evaluation, the study used keywords including bioethanol production, bioethanol feedstocks, bioethanol from fruit wastes and bioethanol production technology to search for published studies in databases including Google Scholar, Science Direct, Springer Link, Web of Science, and Scopus. 150 articles were identified; however, 113 articles met the relevance criteria for inclusion in the present study. This study examines the methods for converting agricultural and fruit waste into bioethanol, along with the environmental and economic benefits, such as blending it with gasoline for use as vehicle fuel. This process boosts gasoline's octane rating, enhances fuel quality, lowers production costs, and reduces exhaust emissions. Besides, the present study assesses global bioethanol production and summarizes the findings from various studies on fruit wastes generation, potentiality of fruit wastes, bioethanol production and properties, potentiality of bioethanol as an energy source, bioethanol production process, parameters affecting optimal bioethanol production during microbial fermentation. It is suggested that attention be given to fruit wastes considering the cost and conditions to improve bioethanol yields through fermentation processes.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"10 ","pages":"Article 100188"},"PeriodicalIF":0.0,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785512","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":"Plant level analysis of energy efficiency change and technical efficiency measurement of Indian iron and steel manufacturers for evaluating advancements and uncovering further opportunities","authors":"Avijit Nayak ,&nbsp;Niranjan Nayak ,&nbsp;Binod Kumar Sahu","doi":"10.1016/j.cles.2025.100187","DOIUrl":"10.1016/j.cles.2025.100187","url":null,"abstract":"<div><div>India is on its path to decarbonise the industrial sector for achieving climate change goals. Under National Mission for Enhanced Energy Efficiency India is implementing target-oriented, market-driven scheme since 2012 to cut energy intensity in key industrial sectors. This study examined the energy efficiency changes in forty-three Iron and Steel industries using the decomposed Malmquist Productivity Index and found only 2.9 % improvement in pure technical efficiency between 2009 and 2019. Additionally, if the energy intensity targets are met by 2024–25, further improvement of at least 4.9 % in technical efficiency is anticipated since 2009. Therefore, energy efficiency improvement in the sector found is slow during the decade and the energy intensity of the Iron and Steel industries has remained largely unchanged. The schemes aimed at enhancing energy efficiency have had little to no effect on improving energy efficiency within these industries. Also, the mean technical efficiency of forty-three Iron and Steel industries evaluated as 79.6 %, indicating the potential for a 20 % reduction in energy intensity. Now, under Indian Carbon Market the framework has been set for industries to migrate to Carbon Credit Trading Scheme. Therefore, the factors influencing the poor pace of energy efficiency improvements must be addressed under new framework.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"10 ","pages":"Article 100187"},"PeriodicalIF":0.0,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785513","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":"Techno-environmental assessment of the fuel properties of a variety of briquettes for biomass boiler applications","authors":"C.K.K. Sekyere ,&nbsp;R. Opoku ,&nbsp;B. Asaaga ,&nbsp;B. Baah ,&nbsp;P.Y. Andoh ,&nbsp;G.Y. Obeng ,&nbsp;J. Agbogla","doi":"10.1016/j.cles.2025.100185","DOIUrl":"10.1016/j.cles.2025.100185","url":null,"abstract":"<div><div>This study evaluates the fuel properties of five briquette samples made of Saw Dust (SD), Cocoa Shell (CS), Corn Cob (CC), Palm Kernell Shell (PKS) and Coconut Husk (CH), blended with starch at 50 % binder ratio to assess their suitability as boiler fuels, addressing the need to transition to cleaner, more efficient and sustainable boiler fuels for effective decarbonization of the heat and power sector of industry in Ghana. Pertinent solid fuel properties were measured to characterize fuel performance ranges. Environmental implications were also assessed through emissions measurements. SD emerges with the lowest relaxation ratio (1.39), indicating superior stability during transportation. CC exhibits the highest HHV (25.22 MJ/kg), while CH (187 g/h) demonstrates superior fuel economy. CH (27.93 %wt.) presents higher igniting potential, while CC and PKS may necessitate combustion-enhancing additives for ignition. CC (12.34 ± 2.25 wt. %) yields lesser ash, potentially enhancing boiler performance and guaranteeing minimum maintenance as compared with the other briquette samples. Four-day average measurements reveal minimal CO₂ and CO emissions for all samples, indicating negligible environmental threat. PM2.5 emissions mostly conform to WHO safety thresholds, albeit SD exceeding the recommended limit. The diversity of desirable fuel properties obtained, barring the few anomalies observed, demonstrate that briquettes hold the key to achieving fuel resource, environmental, and performance sustainability so far as boilers are concerned. The results also serve as pointers for further research to consolidate knowledge on more detailed fuel performance characteristics.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"10 ","pages":"Article 100185"},"PeriodicalIF":0.0,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800104","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 case for supporting distributed wind energy deployment in commercial-scale potato production based on field measurements in Ireland","authors":"Raymond Byrne,&nbsp;Paul MacArtain,&nbsp;Gerard Reaburn","doi":"10.1016/j.cles.2025.100186","DOIUrl":"10.1016/j.cles.2025.100186","url":null,"abstract":"<div><div>Potato production is seasonal in nature, resulting in the requirement for product storage in order to meet ongoing demands of consumer markets. Maintaining potato quality in medium- to long-term storage is temperature dependent and typically requires refrigeration to maintain a stable storage environment. This represents an energy demand that adds to production costs and greenhouse gas emissions using conventional fossil-based energy supplies. On-site renewable technology deployment presents opportunities to mitigate against these, however, the appropriate deployment of such technologies requires a site-specific understanding of energy demand and available renewable energy resources to best match the energy resources to demand. This research case study makes the case for on-site distributed wind electricity generation compared with solar PV in commercial-scale potato production in Ireland. It is based on high-resolution multi-annual measurements of electricity demand along with measurements and modelling of available on-site wind and solar resources at a commercial-scale producer's site. The results show that despite higher capital costs at present, distributed wind energy can be more appropriate for the given energy demand and resource profiles. A critical need to embed energy demand and resource matching criteria in government supports for on-site renewable energy deployment is highlighted. The learnings from this case study may be of benefit to numerous prospective stakeholders such as end-users, agricultural bodies and government agencies engaged with energy and carbon reduction in agriculture.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"10 ","pages":"Article 100186"},"PeriodicalIF":0.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738887","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":"Thermodynamic analysis of a novel organic Rankine cycle operating with various thermal energy sources","authors":"Evangelos Bellos","doi":"10.1016/j.cles.2025.100184","DOIUrl":"10.1016/j.cles.2025.100184","url":null,"abstract":"<div><div>The goal of this work lies in the investigation of a highly efficient organic Rankine cycle (ORC) under operation with various heat sources. The suggested cycle includes recuperation, regeneration and reheating, called RRR-ORC, and it is studied for operation with biomass, solar thermal collectors (evacuated flat plate units) and waste heat recovery. The analysis is parametric by investigating different design scenarios, as well as there is optimization aiming at the maximization of energy efficiency. Moreover, the reported results are directly compared with the respective with the recuperative ORC (benchmark scenario). The results prove that the RRR-ORC is a more efficient choice than the Recuperative-ORC thermodynamically and for operation with biomass and solar thermal collectors in all the studied scenarios. However, the use of the waste heat source for feeding the cycle is beneficial in most of the studied cases and not in all the examined scenarios; there are some reported reductions in the performance in the scenarios with low waste heat source temperatures. In the typical scenario of T_sat=110 °C and T_cond=40 °C, the energy efficiency enhancement compared to the recuperative cycle for the biomass-based system is 20.89 %, for the solar-based system is 20.22 %, while for the waste heat recovery system is only 2.72 %. However, it is useful to add that the reported exergy efficiency values with the waste heat recovery systems are significantly higher compared to the biomass and solar-based configurations.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"10 ","pages":"Article 100184"},"PeriodicalIF":0.0,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734552","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}