Cleaner Energy Systems最新文献

{"title":"Integration of Hydrogen Production Using High Temperature Steam Electrolysis with Advanced Nuclear Energy Systems","authors":"Seth J. Dana,&nbsp;Hailei Wang","doi":"10.1016/j.cles.2025.100216","DOIUrl":"10.1016/j.cles.2025.100216","url":null,"abstract":"<div><div>With the promise of increased economics and improved safety, advanced nuclear reactors, such as the Natrium design by TerraPower and GE Hitachi, can help many electricity energy markets transition to carbon-free power smoothly. Operating at higher temperatures, the Natrium design based on a sodium fast reactor is suitable for co-located hydrogen production using high temperature steam electrolysis. This study models and analyzes three Natrium integrated energy systems with thermal energy storage and co-located hydrogen production. The first two configurations focus on improving thermal efficiency of the reheat Rankine cycle used in the Natrium design, while the final configuration improves hydrogen production efficiency. Results indicate that coupling the Natrium system with hydrogen production can boost its energy efficiency by 1%, and using low grade steam directly from the Natrium steam cycle for hydrogen production significantly reduces system complexity and increases the overall system efficiency by 3%.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"12 ","pages":"Article 100216"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465340","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":"Sustainable hybrid thermo-hygroelectric nanogenerator from ceramic waste: A circular, low-cost solution for decentralized renewable energy","authors":"Maria Cecília Caldeira Vieira ,&nbsp;Ingridi dos Santos Kremer ,&nbsp;Matheus Amancio Correa Neres ,&nbsp;Patrícia Regina Ebani ,&nbsp;Marcus Paulo de Oliveira ,&nbsp;Luisa Dias Lopes ,&nbsp;Larissa Friedrich ,&nbsp;Arthur Batista Bromirsky ,&nbsp;Glauber Rodrigues De Quadros ,&nbsp;Lucas Alves Lamberti ,&nbsp;Josué Neroti Rigue ,&nbsp;Jocenir Boita","doi":"10.1016/j.cles.2025.100225","DOIUrl":"10.1016/j.cles.2025.100225","url":null,"abstract":"<div><div>The transition to a low-carbon future demands sustainable, scalable, and cost-effective energy technologies that minimize environmental impact while valorizing industrial residues. This study reports the development of a hybrid thermo-hygroelectric nanogenerator integrating iron nanoparticles and red ceramic waste within a functional cementitious matrix, designed for decentralized renewable energy harvesting. The device operates via combined thermal and moisture-induced mechanisms, achieving a maximum output of 1.4 V, 23.3 μA, and 32.7 μW, corresponding to a power density of 13.08 μW/m² when stimulated with water at 98 °C. Materials were synthesized via the polyol method and characterized by XRD, XPS, and XAS, confirming the formation of mixed-valence iron oxides embedded in a silica- and calcium-rich support. Circularity is achieved through the reuse of abundant ceramic waste, while the fabrication process is low-energy and easily scalable. The device exhibited energy conversion efficiencies above 90 % and an estimated operational lifespan of 1.29–7.06 years, supporting applications in off-grid environmental sensing and low-power electronics. This work demonstrates a sustainable pathway to transform industrial residues into functional energy materials, advancing the circular economy and contributing to cleaner production practices.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"12 ","pages":"Article 100225"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145617412","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":"The utilization of Harmota olive oil to produce a sustainable biofuel","authors":"Ribwar Abdulrahman ,&nbsp;Haval Kukha Hawez ,&nbsp;Rawezh Mustafa","doi":"10.1016/j.cles.2025.100212","DOIUrl":"10.1016/j.cles.2025.100212","url":null,"abstract":"<div><div>Biodiesel may be considered a renewable and clean energy source that can contribute to reducing global greenhouse emissions and global warming phenomena. Biodiesel possesses several advantages over traditional petroleum diesel fuel, such as fewer greenhouse gas emissions and environmentally friendly fuel. The local olive oil factories dispose of the olive pomace, a non-edible by-product stream from the production process, with low production costs. Olive oil and pomace oil can be considered appropriate feedstock supporting biodiesel production worldwide. In this study, biodiesel was produced from a local olive oil sample sourced from Harmota olive oil in the Koya district of Iraqi Kurdistan. The produced biodiesel was also examined by several laboratory tests, such as density and cetane value, and the results were compared well with ASTM D6751 standards. The transesterification process utilized potassium hydroxide (KOH) as a catalyst, with varying methanol-to-oil molar ratios. The optimal conditions were identified as a 7:1 methanol-to-oil ratio and 0.5 grams of KOH, achieving a high biodiesel yield of approximately 91%. The resulting biodiesel demonstrated key fuel properties—density (879 kg/m³), viscosity (5.125 mm²/s), cetane number (64), and flash point (165 °C)—which are all within the ASTM D6751 biodiesel standard limits. Furthermore, this study shows the intriguing possibilities of using Harmota olive oil and its by-product, olive pomace oil, as a sustainable and effective feedstock. But it goes beyond that: guaranteeing high-quality biodiesel that is both affordable and environmentally benign depends on process optimization.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"12 ","pages":"Article 100212"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465338","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":"2025-09-01","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":"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":"2025-09-01","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":"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":"2025-09-01","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":"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":"2025-09-01","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":"Forecasting solar energy generation in the mediterranean region up to 2030–2050 using convolutional neural networks (CNN)","authors":"Mahmood Abdoos ,&nbsp;Hamidreza Rashidi ,&nbsp;Pourya Esmaeili ,&nbsp;Hossein Yousefi ,&nbsp;Mohammad Hossein Jahangir","doi":"10.1016/j.cles.2024.100167","DOIUrl":"10.1016/j.cles.2024.100167","url":null,"abstract":"<div><div>This study investigates the significant rise in solar energy production across the Mediterranean region from 2010 to 2022, attributing this growth to technological advancements, cost reductions, and favorable geographic conditions. Utilizing a Convolutional Neural Network (CNN) model, the research forecasts solar energy production for Spain, Egypt, Turkey, France, and Greece up to 2050. Results indicate that Spain is projected to lead with an estimated production of 42,547,680 watt-hours in the summer of 2050, while Turkey is anticipated to reach 20,528,640 watt-hours during the same period. The findings highlight robust growth in all analyzed countries due to increased investments in renewable energy infrastructure and supportive government policies. Quantitative analysis reveals a substantial decline in solar installation costs, exemplified by a decrease from $7.53 per watt in 2010 to $2.65 in 2021 in the U.S., which further stimulates solar energy expansion. The study emphasizes the critical role of government initiatives in promoting renewable energy adoption and outlines how solar energy can significantly contribute to reducing carbon emissions and enhancing energy security. Comparisons with regions such as the Middle East and southwestern United States suggest commonalities in solar potential but also highlight challenges posed by climatic variability and infrastructure differences. The robustness of the CNN model is demonstrated through its ability to integrate real-time climate data, enhancing forecasting accuracy by accounting for factors like solar radiation changes and extreme weather events. The research concludes by advocating for further refinement of the model through hybrid techniques and climate change scenario integration to bolster predictive capabilities. Overall, these insights provide valuable guidance for policymakers and energy producers in planning sustainable energy production strategies for the future.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"10 ","pages":"Article 100167"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133759","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":"Design of an Agro-photovoltaic system to find shade tolerant crops perspective to Bangladesh","authors":"Raihan Chowdhury ,&nbsp;Abu Shufian ,&nbsp;Saima Nusrat ,&nbsp;Nur Mohammad","doi":"10.1016/j.cles.2025.100174","DOIUrl":"10.1016/j.cles.2025.100174","url":null,"abstract":"<div><div>Agro-photovoltaic (APV) technology addresses the challenges of land-use competition by enabling simultaneous solar power generation and food production, thus mitigating potential economic, ecological, political, and social conflicts in Bangladesh's future energy landscape. This study investigates the growth and yield of shade-tolerant crops, including tomato, brinjal, green chili, lettuce, aloe vera, under shaded and non-shaded conditions. Key plant growth parameters such as height, number of leaves, flowers, fruits, and fruit weight are measured to evaluate crop performance in the APV system. The Land Equivalent Ratio (LER) is utilized to compare the efficiency of food and energy production in APV systems against traditional monoculture farming, identifying optimal crops for APV integration. Energy generation from a stand-alone APV (SAPV) system is measured and simulated using PVsyst software to optimize system performance and maximize power output. Results indicate that brinjal, lettuce, aloe vera exhibit yield advantages in the APV system, while green chili show disadvantages, and tomato demonstrates no significant difference. The SAPV system achieves an average yearly performance ratio of 75.4 % and a solar fraction (FR) of 0.914, consistently meeting energy demands with an average daily energy production of 1.157 kWh. This study highlights the feasibility of APV systems as a sustainable model for integrated food and energy production in Bangladesh, demonstrating their potential to enhance land-use efficiency and contribute to the nation's energy and agricultural resilience.</div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"10 ","pages":"Article 100174"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133854","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":"Exergoeconomic assessment and parametric study of combined recompression supercritical carbon dioxide Brayton – Organic Rankine cycle with integrated LiBr/H2O absorption refrigeration cycle and thermoelectric generator modules","authors":"Dodeye Ina Igbong ,&nbsp;Awafung Emmanuel Adie ,&nbsp;Archibong Archibong-Eso","doi":"10.1016/j.cles.2025.100179","DOIUrl":"10.1016/j.cles.2025.100179","url":null,"abstract":"<div><div>The integration of innovative systems as an effective waste-heat recovery strategy for the utilization of low-temperature heat sources is receiving increased attention as an alternative sustainable approach towards reducing fossil fuel combustion and emission pollution. Heat sink devices are identified as the primary sources of waste-heat, hence, the effective utilization of the waste-heat through systems integration are exploited. In this study, exergetic and exergoeconomic based parametric analysis is performed on combined recompression supercritical carbon dioxide Brayton - organic Rankine cycle with integrated LiBr/H₂O absorption refrigeration cycle and thermoelectric generator units. The proposed system aims to maximize low-grade waste heat conversion to electricity through sustainable system integration. Thermodynamic and exergoeconomic analysis was performed for both the base- and enhanced-systems, and parametric investigation carried out to predict the effect of temperature, pressure and mass flow rate variation on system's performance parameters. Results obtained indicate that the enhanced-system has a net power output of +48.58 % higher than the base-system, with 1.3 %, 11.9 %, and 14.7 % contributed by the thermoelectric generators (TEGI, TEGII, and TEGIII, respectively). Similarly, the enhanced-system reveals +22.55 % and +28.19 % better first- and second-law efficiencies than the base-system. The heat exchanger, absorption refrigeration cycle generator and solution heat exchanger are the major components with the highest value of exergy destruction with 15.23 %, 12.99 %, and 11.97 % contribution to the total exergy destroyed in the system. Therefore, the same components are considered priority for system improvement efforts as suggested by the values of improvement potential, fuel depletion ratio, Irreversibility and <span><math><mrow><msub><mover><mi>Z</mi><mi>˙</mi></mover><mi>k</mi></msub><mo>+</mo><msub><mover><mi>C</mi><mi>˙</mi></mover><mi>D</mi></msub></mrow></math></span><strong>.</strong></div></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":"10 ","pages":"Article 100179"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463435","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}