Cleaner Engineering and Technology最新文献_第10页

Unlocking the potential of copper sulfide tailings as a secondary source for tellurium and precious metals: a comprehensive characterization study 解锁硫化铜尾矿作为碲和贵金属二次来源的潜力：一项全面的表征研究

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-09-18 DOI: 10.1016/j.clet.2025.101081

Fardis Nakhaei , Lana Alagha , Gary Wyss

{"title":"Unlocking the potential of copper sulfide tailings as a secondary source for tellurium and precious metals: a comprehensive characterization study","authors":"Fardis Nakhaei , Lana Alagha , Gary Wyss","doi":"10.1016/j.clet.2025.101081","DOIUrl":"10.1016/j.clet.2025.101081","url":null,"abstract":"<div><div>This study investigated historical copper sulfide tailings as an unconventional source of tellurium (Te), gold (Au), and silver (Ag). Advanced analytical studies were conducted to determine the geochemical and mineralogical properties of the tailing samples. The results showed that tetradymite (Bi2Te2S) was the predominant Te-bearing mineral, while hessite (Ag<sub>2</sub>Te) was a minor Te carrier, both notably occurring within fine-grained (<8 μm) inclusions in pyrite. Gold was present as native Au, electrum (Au-Ag), and within complex silver tellurides hosted primarily in chalcopyrite and pyrite. Froth flotation studies showed that the 180 to 38 μm size range was the optimum feed size that yielded recoveries of 59 %, 37 %, and 27 % for Te, Au, and Ag, respectively. These findings suggested that froth flotation is a feasible method for concentrating Te-Au-Ag-bearing phases. Given the strong association between Te, Au, Ag, and Cu, the co-extraction of these metals should significantly enhance the economic viability of tailings’ processing.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101081"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119768","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}

引用次数: 0

Optimization of drop-on-demand 3D printing of natural latex ink for the fabrication of customized medical splints 优化天然乳胶墨水按需3D打印，用于定制医疗夹板的制造

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-11-01 DOI: 10.1016/j.clet.2025.101112

Chakrit Suvanjumrat , Kanchanabhorn Chansoda , Machimontorn Promtong , Panithi Wiroonpochit , Thongsak Kaewprakob , Watcharapong Chookaew

{"title":"Optimization of drop-on-demand 3D printing of natural latex ink for the fabrication of customized medical splints","authors":"Chakrit Suvanjumrat , Kanchanabhorn Chansoda , Machimontorn Promtong , Panithi Wiroonpochit , Thongsak Kaewprakob , Watcharapong Chookaew","doi":"10.1016/j.clet.2025.101112","DOIUrl":"10.1016/j.clet.2025.101112","url":null,"abstract":"<div><div>A novel drop-on-demand (DoD) 3D printing system was developed to fabricate complex-shaped products using natural latex ink. The printing parameters were systematically optimized based on the roundness and deposition behavior of rubber droplets, with 75 % alcohol identified as the most effective medium among various acid coagulants. The latex, formulated with a viscosity of 800 cP, was tailored to ensure printability and structural integrity. Optimal conditions—including a 0.85 mm nozzle diameter, a deposition rate of 45 mm<sup>3</sup>/s, an alcohol bath height of 3 mm, and a nozzle tip height of 10 mm from the medium surface—enabled the successful fabrication of a custom-designed palm splint featuring intricate geometry within 70 min. Dimensional comparison between the digital model and the printed splint in the X-Z and Y-Z planes revealed a deviation of only 9.89 %, which is acceptable for personalized medical devices. The printed splint exhibited a porous structure that enhances breathability and conformed precisely to the user's hand. Mechanical testing showed that the deposited rubber achieved a tensile strength exceeding 4.5 MPa and an elongation at break greater than 950 %, with droplet roundness values approaching unity. This DoD 3D printing approach significantly reduces material preparation time and production costs, offering a promising pathway for the rapid, cost-effective manufacturing of customized rubber-based products.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101112"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145466216","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}

引用次数: 0

Sustainable power generation in Kuwait: Reducing pollutants and costs through innovative additive technology 科威特的可持续发电：通过创新的添加剂技术减少污染物和成本

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-09-13 DOI: 10.1016/j.clet.2025.101078

Asmaa A. Esmael, Naser S. Alselahi, Nayef Z. Al-Mutairi

{"title":"Sustainable power generation in Kuwait: Reducing pollutants and costs through innovative additive technology","authors":"Asmaa A. Esmael, Naser S. Alselahi, Nayef Z. Al-Mutairi","doi":"10.1016/j.clet.2025.101078","DOIUrl":"10.1016/j.clet.2025.101078","url":null,"abstract":"<div><div>The use of low-quality heavy fuel oil in Kuwait's thermal power plants has resulted in considerable operating inefficiencies and increased emissions of sulfur oxides (SO<sub>x</sub>), nitrogen oxides (NO<sub>x</sub>), and unburned carbon. These problems elevate maintenance costs, diminish boiler efficiency, and exacerbate environmental deterioration. This research assesses the efficacy of a water-in-oil emulsifier and a magnesium-based neutralizer in improving combustion performance and reducing emissions. Field studies were conducted in partnership with the Ministry of Electricity and Water (MEW) from 2016 to 2018 at four major power plants, with performance metrics assessed before and after treatment. The analysis included unburned carbon in fly ash, nitrogen oxides (NO<sub>x</sub>) concentrations, ash pH, free mineral acidity, and the dew point temperature of sulfuric acid.</div><div>The findings indicated that the additional treatment decreased unburned carbon by around 40 % and NO<sub>x</sub> by as much as 80 %, while concurrently reducing surplus air demands and enhancing heat exchange efficiency. Estimated fuel cost reductions ranged from 51.4 to 77.0 million USD yearly, depending upon operational circumstances. The use of additives decreased boiler fouling and corrosion, hence prolonging equipment life and reducing maintenance requirements. This research demonstrates that the application of fuel-oil additives represents a financially viable and environmentally beneficial strategy for Kuwait's thermal power industry, offering a practical pathway toward cleaner and more sustainable energy production.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101078"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269620","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}

引用次数: 0

Effect of silane-treated jute/sisal cellulose reinforcement on the mechanical, tribological, and hydrophobic behavior of polyester composites 硅烷处理的黄麻/剑麻纤维素增强剂对聚酯复合材料力学、摩擦学和疏水性的影响

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-11-21 DOI: 10.1016/j.clet.2025.101122

N. Lakshmaiya , T. Raja , D. Yuvarajan

{"title":"Effect of silane-treated jute/sisal cellulose reinforcement on the mechanical, tribological, and hydrophobic behavior of polyester composites","authors":"N. Lakshmaiya , T. Raja , D. Yuvarajan","doi":"10.1016/j.clet.2025.101122","DOIUrl":"10.1016/j.clet.2025.101122","url":null,"abstract":"<div><div>Natural fiber–reinforced composites are attracting attention as sustainable alternatives to synthetic materials, but improving their strength, wear resistance, and water stability remains challenging. The present study focuses on developing silane-treated jute–sisal hybrid fiber-reinforced polyester composites enhanced with plant-derived cellulose microfillers to improve their mechanical, tribological, and hydrophobic performance. The main objective was to strengthen fiber–matrix interfacial bonding and enhance overall composite durability by combining hybrid natural fibers with chemical surface modification. The novelty of this work lies in the integration of silane surface treatment with cellulose microfiller reinforcement, which establishes strong Si–O–Si and Si–O–C bonds that improve adhesion, reduce voids, and minimize water diffusion—an approach not widely reported for hybrid natural fiber composites. The composites were fabricated by hand lay-up with cellulose contents of 0–6 wt%, followed by curing at 120 °C. Among all configurations, the G3 composite (4 wt% cellulose) exhibited the highest tensile strength (115.5 MPa), flexural strength (137.2 MPa), interlaminar shear strength (28.8 MPa), and impact energy (5.16 J), showing a 51 % improvement over the untreated system. The G4 composite (6 wt% cellulose) demonstrated the lowest wear rate (0.38 mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup>) and coefficient of friction (0.014), while fracture toughness improved by 340 % and energy release rate by 224 % compared with neat polyester. Water absorption decreased to 23.2 %, indicating enhanced interfacial sealing and moisture resistance. The correlation between fiber hybridization, silane bonding, and filler dispersion confirms a strong synergistic effect. The developed composites offer a sustainable, high-strength, and wear-resistant material suitable for lightweight structural and tribological applications in automotive, aerospace, and defense sectors.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101122"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145623840","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}

引用次数: 0

Production of levulinic acid from oil palm empty fruit bunch fiber using novel tin oxide catalysts 新型氧化锡催化剂催化油棕空果束纤维生产乙酰丙酸

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-10-31 DOI: 10.1016/j.clet.2025.101111

Ubolluk Rattanasak , Yusuf Chisti , Sarawut Jitpinit , Kamchai Nuithitikul

{"title":"Production of levulinic acid from oil palm empty fruit bunch fiber using novel tin oxide catalysts","authors":"Ubolluk Rattanasak , Yusuf Chisti , Sarawut Jitpinit , Kamchai Nuithitikul","doi":"10.1016/j.clet.2025.101111","DOIUrl":"10.1016/j.clet.2025.101111","url":null,"abstract":"<div><div>Levulinic acid (LA; 4-oxopentanoic acid, C<sub>5</sub>H<sub>8</sub>O<sub>3</sub>) is a useful platform chemical for making diverse other commercial products. This work developed a novel catalytic system for efficient production of LA from oil palm empty fruit bunch (EFB), a widely available lignocellulosic waste. First, the EFB was pretreated with tetrahydrofuran to obtain a cellulose-rich solid substrate that was subsequently converted to LA in a stirred batch reactor using solid acid catalysts. The catalysts were sulfated tin oxide (SO<sub>4</sub><sup>2−</sup>/SnO<sub>2</sub>) and a newly developed iron-doped variant, sulfated iron–tin oxide (SO<sub>4</sub><sup>2−</sup>/Fe–SnO<sub>2</sub>). Iron doping significantly increased both the specific surface area (from 145.9 to 168.7 m<sup>2</sup> g<sup>−1</sup>) and the number of acid sites. The effects of reaction temperature (180–220 °C), reaction time (1–6 h), and the catalyst loading (0–4 % w w<sup>−1</sup>) on the yield of LA and the other useful byproducts are reported. The sulfated iron-tin oxide catalyst was more active than the sulfated tin oxide under certain reaction conditions. Notably, it achieved a maximum LA yield of 31.2 % w w<sup>−1</sup> based on the pretreated EFB, or 39.9 % w w<sup>−1</sup> based on available cellulose, surpassing many metal oxide catalysts reported in the literature. The optimum reaction conditions were 200 °C, 1 h, and a SO<sub>4</sub><sup>2−</sup>/Fe-SnO<sub>2</sub> catalyst loading of 2 % w w<sup>−1</sup>. The promising heterogeneous catalytic approach used here for upgrading lignocellulosic waste to higher value chemicals offers environmental and economic benefits.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101111"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145466214","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}

引用次数: 0

High-throughput and waste-reducing synthesis of dispersant-free Cu nanoparticles via CuO reduction 通过CuO还原制备无分散剂Cu纳米颗粒的高通量和减废

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-10-30 DOI: 10.1016/j.clet.2025.101108

Gosuke Takano, Yamato Hayashi, Yuto Ishida, Hirotsugu Takizawa

{"title":"High-throughput and waste-reducing synthesis of dispersant-free Cu nanoparticles via CuO reduction","authors":"Gosuke Takano, Yamato Hayashi, Yuto Ishida, Hirotsugu Takizawa","doi":"10.1016/j.clet.2025.101108","DOIUrl":"10.1016/j.clet.2025.101108","url":null,"abstract":"<div><div>The size of nanoparticles synthesized by the liquid phase reduction method depends on the concentration of metal ions. Thus, it is difficult to synthesize fine nanoparticles with high concentration. However, by using solid raw materials and by controlling both solubility and nucleation, the synthesis of nanoparticles at high concentrations can be realized. The instantaneous high degree of nucleation would not necessitate the addition of dispersants. Cu nanoparticles were synthesized by reduction with N<sub>2</sub>H<sub>4</sub>·H<sub>2</sub>O using CuO as a raw material whose dissolution was promoted with the addition of CH<sub>3</sub>COOH. Varying concentrations of CH<sub>3</sub>COOH, N<sub>2</sub>H<sub>4</sub>·H<sub>2</sub>O, and CuO were used to investigate their effects. The synthesized material was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Cu nanoparticles (raw material concentration of 4 M) were synthesized by a 10 min reduction. This concentration is 20 times higher than that of conventional chemical reduction methods. At a raw material concentration of 4 M, Cu nanoparticles were synthesized with a high yield (99.69 %). The average particle size of the synthesized sample was 121.9 nm, half the size of nanoparticles synthesized at 1 M concentration. Furthermore, this process suppresses the generation of harmful waste liquids and does not require further cleaning. The rate-determining step of the reaction in the solid-liquid reaction field was the dissolution process of the raw material particle surface, and due to the instantaneous high nucleation rate, it is a Waste-Reducing synthesis method that does not require a dispersant.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101108"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417117","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}

引用次数: 0

Blockchain-based traceability and certifications of hydrogen refueling station components 基于区块链的加氢站组件可追溯性和认证

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-10-31 DOI: 10.1016/j.clet.2025.101104

Hajar H. Alshehhi , Ammar Hummieda , Ahmad Musamih , Assia Chadly , Khaled Salah , Ahmad Mayyas

{"title":"Blockchain-based traceability and certifications of hydrogen refueling station components","authors":"Hajar H. Alshehhi , Ammar Hummieda , Ahmad Musamih , Assia Chadly , Khaled Salah , Ahmad Mayyas","doi":"10.1016/j.clet.2025.101104","DOIUrl":"10.1016/j.clet.2025.101104","url":null,"abstract":"<div><div>As hydrogen gains prominence in energy systems, its adoption as an energy source for fuel cell electric vehicles (FCEVs) necessitates the establishment of hydrogen refueling stations (HRS). These stations contain critical compo-nents, including nozzles, storage tanks, heat exchangers, and compressors, which must be certified by regulatory agen-cies to ensure safety and public trust. Current certification processes are fragmented and manually intensive, creating inefficiencies and limiting transparency across the infrastructure lifecycle. In this paper, we propose a blockchain-based solution that creates a secure and auditable network for certifying key HRS components. The system integrates an EVM-compatible blockchain, decentralized storage, and a modular suite of smart contracts (SCs) that formalize registration, bidding, accreditation, certification, and governance. Each contract encodes a distinct actor-driven work-flow, enabling traceable and role-specific operations. A Decentralized Application (DApp) interface supports real-time and role-based interaction across the ecosystem. We present and evaluate the SCs and their underlying algorithms us-ing gas usage analysis, load testing, and security auditing. Load testing across the certification lifecycle shows stable transaction throughput and predictable cost profiles under increasing actor activity. A static security analysis con-firms resilience against common vulnerabilities. Our cost analysis indicates that while the framework is technically deployable on public blockchains, the execution costs of certain functions make it more cost-effective for private blockchains or Layer 2 networks. We also compare our framework with existing systems to highlight its novelty and technical advantages. Our SCs, DApp interface, and load testing scripts are publicly available on GitHub.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101104"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145466095","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}

引用次数: 0

Field validation of predictive model for greenhouse gas emissions from unsanitary landfill 不卫生填埋场温室气体排放预测模型的现场验证

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-09-25 DOI: 10.1016/j.clet.2025.101086

Md. Tushar Ali, Qauzi Hamidul Bari, Islam M. Rafizul

{"title":"Field validation of predictive model for greenhouse gas emissions from unsanitary landfill","authors":"Md. Tushar Ali, Qauzi Hamidul Bari, Islam M. Rafizul","doi":"10.1016/j.clet.2025.101086","DOIUrl":"10.1016/j.clet.2025.101086","url":null,"abstract":"<div><div>Unsanitary landfill practices in developing countries like Bangladesh significantly contribute to global greenhouse gas (GHG) emissions, exacerbating climate change impacts. GHG estimation and measurement often rely on approximate input data, overlooking waste height variations and leading to emission inconsistencies. This study employs LandGEM-V-3.03, integrating actual landfill waste deposition from truck scale monitoring, waste generation and collection trends, and a precisely estimated landfill lifespan for improved assessment. Additionally, a static closed flux chamber was used to measure CH<sub>4</sub> and CO<sub>2</sub> across four seasons at varying waste heights, which were precisely assessed using a LiDAR-based Digital Terrain Model (DTM). The study also examined emission correlations with temperature and humidity. Results show a sharp increase in methane emissions, peaking at 5.8 Gg/year in 2025, driven by waste-damping rates. Humidity exhibits a stronger correlation with methane emissions (R<sup>2</sup> = 0.998, 0.944 for model and field) and is statistically significant (p < 0.05), unlike temperature. A similar trend was observed for CO<sub>2</sub>, where emissions were significantly higher than CH<sub>4</sub> (CH<sub>4</sub>-to-CO<sub>2</sub> ratio 0.25 to 0.57) due to both aerobic and anaerobic production modes. Field measurements underestimated emissions by 5–20 %, with the highest emissions and discrepancies occurring during monsoon. Waste height significantly influenced CH<sub>4</sub> emissions (R<sup>2</sup> = 0.82, p = 0.00), increasing at 2.88 mg/m<sup>2</sup>/min per meter, while CO<sub>2</sub> emissions showed a weaker, statistically insignificant correlation (R<sup>2</sup> = 0.4, p > 0.05). The study highlights the critical need for improved landfill management practices and precise emission monitoring for effective GHG mitigation.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101086"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222749","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}

引用次数: 0

Performance analysis of vanadium redox flow battery for residential photovoltaic integrated energy storage system 住宅光伏综合储能系统用钒氧化还原液流电池性能分析

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-10-03 DOI: 10.1016/j.clet.2025.101087

Akeratana Noppakant , Surasak Noituptim , Sawek Pratummet , Supapradit Marsong , Wanwinit Wijittemee , Sarun Nakthanom , Boonyang Plangklang

{"title":"Performance analysis of vanadium redox flow battery for residential photovoltaic integrated energy storage system","authors":"Akeratana Noppakant , Surasak Noituptim , Sawek Pratummet , Supapradit Marsong , Wanwinit Wijittemee , Sarun Nakthanom , Boonyang Plangklang","doi":"10.1016/j.clet.2025.101087","DOIUrl":"10.1016/j.clet.2025.101087","url":null,"abstract":"<div><div>This research investigates the integration of photovoltaic (PV) rooftop systems with vanadium redox flow batteries (VRFB) for residential energy storage applications. Using solar irradiance data from the Bangkok Metropolitan Region and residential load profiles based on energy consumption statistics for Thai households, simulations were conducted using Homer Pro to evaluate system performance and optimize component sizing. The results showed that increasing PV capacity leads to significant surplus energy, which can be effectively stored in VRFB systems. A configuration consisting of a 6 kW PV system and a 35 kWh VRFB achieved an energy storage efficiency of 80.14 %, reduced electricity costs by 35 % compared to grid-only usage, and lowered annual CO<sub>2</sub> emissions by 4.73 ton CO<sub>2</sub>/year relative to conventional fossil-based systems. Additionally, the system enhanced grid independence by fully eliminating peak demand fluctuations and maintained stable operation under varying solar conditions. These findings offered practical insights for the design of efficient and sustainable PV-VRFB systems in residential settings.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101087"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269618","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}

引用次数: 0

Impact of energy taxes and eco-innovation on sustainable energy markets 能源税和生态创新对可持续能源市场的影响

IF 6.5

Cleaner Engineering and Technology Pub Date : 2025-12-01 Epub Date: 2025-10-14 DOI: 10.1016/j.clet.2025.101097

Shayan Mohammaddini , Amirali Saifoddin , Amin Zahedi , Mahmood Abdoos , Ahmad Hajinezhad

{"title":"Impact of energy taxes and eco-innovation on sustainable energy markets","authors":"Shayan Mohammaddini , Amirali Saifoddin , Amin Zahedi , Mahmood Abdoos , Ahmad Hajinezhad","doi":"10.1016/j.clet.2025.101097","DOIUrl":"10.1016/j.clet.2025.101097","url":null,"abstract":"<div><div>Guaranteeing sustainable energy is crucial to meet the rising energy needs driven by population growth. In this study, the correlation and trend between the share of renewable energy usage, a key indicator of energy sustainability, the energy tax factor, and eco-innovations, assessed through the ratio of patents in environmental technologies and the proportion of total national spending on R&D relative to GDP, have been examined using a regression model from 2004 to 2022 across four regions of the European Union: North, West, East, and South. This is to determine the impact of various solutions and policies on energy sustainability, given its increasing importance in recent years. The findings indicate that Sweden, located in Northern Europe, possesses the highest proportion of renewable energy at an average of 50.29 percent. In contrast, Malta, situated in Southern Europe, has the lowest share, averaging at 4.59 percent. The factors of energy taxation, environmental patents, and research and development exhibit the strongest positive correlations with the energy sustainability index in Belgium, with correlations of 0.90, 0.64, and 0.97, respectively. Among the regression models presented for all EU countries, the models presented in the Czech Republic in Eastern Europe and Belgium and Germany in Western Europe have the lowest error with RMSE of 0.394, 0.467 and 0.540 percent, respectively, which is due to the high correlation between their data. Lastly, it can be said that the current study's methodology can be applied to other nations as well.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"29 ","pages":"Article 101097"},"PeriodicalIF":6.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145363081","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}

引用次数: 0