Cleaner Engineering and Technology最新文献

{"title":"Innovative pathways to sustainable energy: Advancements in clean coal technologies in Bangladesh - A review","authors":"Faysal Ahamed Akash ,&nbsp;Shaik Muntasir Shovon ,&nbsp;Md. Abdur Rahman ,&nbsp;Wahida Rahman ,&nbsp;Prosenjeet Chakraborty ,&nbsp;Md. Nazwanul Haque ,&nbsp;Minhaj Uddin Monir ,&nbsp;Md. Ahosan Habib ,&nbsp;Arup Kumar Biswas ,&nbsp;Shahariar Chowdhury ,&nbsp;Mohammad Forrukh Hossain Khan ,&nbsp;Tofan Agung Eka Prasetya","doi":"10.1016/j.clet.2024.100805","DOIUrl":"10.1016/j.clet.2024.100805","url":null,"abstract":"<div><p>As a densely populated country experiencing rapid economic growth, Bangladesh faces a surging demand for energy. Despite efforts to develop renewable energy sources, coal remains a significant share of the energy mix with a consumption of 2,099,900 tons. However, conventional coal utilization raises environmental concerns like greenhouse gas emissions and other hazardous pollutants. To tackle these issues, viable solutions like clean coal technologies come into play. These encompass high-efficiency low-emission (HELE) power stations, carbon capture utilization and storage (CCUS) systems, integrated gasification combined cycle (IGCC), as well as supercritical and ultra-supercritical steam cycles (S/USC), providing adequate means to reduce the ecological effects tied to coal-powered electricity production. This paper asserts that the strategic adoption of clean coal technologies can play a pivotal role in shaping Bangladesh's sustainable energy future, contingent upon robust policy frameworks, environmental impact and recommend that the government must incentivize HELE, CCUS, and clean coal as well as promote international collaboration. Moreover, modern coal preparation techniques and the future research direction are also discussed in this paper and additionally this study suggests that HELE technologies are more suitable for Bangladesh than other current technologies. These strategies have the potential to yield enhanced economic benefits and offer viable solutions for achieving the clean and efficient conversion of coal resources.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100805"},"PeriodicalIF":5.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000855/pdfft?md5=5e53fea8f42c8a5d545b35f0ff1b4b90&pid=1-s2.0-S2666790824000855-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150792","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":"Soft computing approaches for photovoltaic water pumping systems: A review","authors":"Ikram Saady ,&nbsp;Btissam Majout ,&nbsp;Mohamed Said Adouairi ,&nbsp;Mohammed Karim ,&nbsp;Badre Bossoufi ,&nbsp;Mishari Metab Almalki ,&nbsp;Thamer A.H. Alghamdi","doi":"10.1016/j.clet.2024.100800","DOIUrl":"10.1016/j.clet.2024.100800","url":null,"abstract":"<div><p>Water pumping systems are crucial for extracting water from deep wells. However, electricity shortages and high fuel prices significantly impact the efficiency and reliability of these systems. Therefore, renewable energy sources have gained more attention as alternatives to fossil fuels. Photovoltaic (PV) energy-based pumping systems, in particular, are becoming popular, especially in rural areas where grid connections are often unavailable. Several factors influence the performance of photovoltaic water pumping systems (PVWPS), including solar irradiance, temperature, system design, maintenance, and pumping load. To ensure optimal performance under these varying conditions, two controllers are crucial. The first controller is the Maximum Power Point Tracking (MPPT) controller, designed to maximize power extraction from the PV panels under varying environmental conditions (in particular, solar radiation and temperature). The second controller regulates the speed and torque of the induction motor (IM) which drives the pump responsible for water extraction. Therefore, to improve the performance of these controllers under different conditions. This review paper first examines widely used soft computing methods, providing a detailed description of each. These methods are then applied to both the MPPT and the IM controllers, offering valuable insights for researchers looking to develop advanced PVWPS control configurations for future applications.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100800"},"PeriodicalIF":5.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000806/pdfft?md5=67879df48b565af841073e79f005221c&pid=1-s2.0-S2666790824000806-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150793","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":"Optimizing biomass supply chains: A probabilistic approach to managing uncertainties in southwest Nigeria","authors":"Olukolade F. Ogunrewo,&nbsp;Nnamdi I. Nwulu","doi":"10.1016/j.clet.2024.100785","DOIUrl":"10.1016/j.clet.2024.100785","url":null,"abstract":"<div><p>Efficient and sustainable use of biomass resources is crucial to meet the increasing demand for bio-based products and renewable energy. The biomass supply chain, which includes harvesting, collecting, logistics, storage, and pre-treatment, faces challenges due to uncertainties such as market fluctuations, equipment availability, weather conditions, and transportation constraints. These uncertainties often hinder the optimisation of the supply chain. This research work explores the performance of the biomass supply chain by optimizing operations while accounting for these uncertainties. Nigeria is faced with power issues and there are resources to combat the problem through generation of cleaner energy from biomass. Using mathematical modelling, the study evaluates the impact of uncertainty on key performance areas like feedstock supply, inventory management, transportation efficiency, and processing capacity. The research demonstrates the importance of incorporating uncertainty-aware solutions to minimize risks and improve the flexibility of the biomass supply chain. Sensitivity analyses and case studies shows that the proposed probabilistic modelling approach provides valuable insights into system vulnerabilities and effective strategies for optimizing operations under uncertain conditions. The findings highlight the potential of this approach to improve decision making, resource allocation, and promote sustainable practices in the biomass sector. Ultimately, the study contributes to advancing biomass supply chain management, paving the way for a more resilient and efficient use of bioresources.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100785"},"PeriodicalIF":5.3,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266679082400065X/pdfft?md5=71e0a6969d594fd314d4b9dae64a0b59&pid=1-s2.0-S266679082400065X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142172642","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":"Aerodynamic performance improvement of 3-PB VAWT using blades with optimized tilted angles","authors":"Alireza Ghorbanpoor Lafmejani ,&nbsp;S.M.H. Karimian ,&nbsp;Mohammad Sadegh Moradi Ghareghani","doi":"10.1016/j.clet.2024.100801","DOIUrl":"10.1016/j.clet.2024.100801","url":null,"abstract":"<div><p>In the present work, a new configuration of the three-part blade (3-PB) Vertical Axis Wind Turbine (VAWT) is introduced. This new configuration is designed to further improve the aerodynamic performance of the 3-PB VAWT by tilting all three parts of every single blade along its central chord line. An optimization process is conducted to find the best tilt angle of blade parts in order to maximize the average total torque coefficient. The optimization process is applied to reference 3-PB VAWT with the help of a Genetic Algorithm (GA) and Artificial Neural Network (ANN) using the solutions of three-dimensional Reynolds averaged Navier-Stokes (RANS) equations at wind speed of <span><math><mrow><mn>7</mn></mrow></math></span> m/s and tip speed ratios from 0.44 to 1.77. Having analyzed different sets of tilt angles, a configuration with tilt angles of 30°, 31° <span><math><mrow><mtext>,</mtext></mrow></math></span> and 30° with respect to part 1, 2, and 3 was detected to be the best choice. The tilted 3-PB VAWT shows promising improvements in most tip speed ratios. Among them, a maximum improvement of 42.99% on the average of the total torque coefficient occurred at tip speed ratio of 0.89.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100801"},"PeriodicalIF":5.3,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000818/pdfft?md5=34f23acf206f504d93eeb56503a3adac&pid=1-s2.0-S2666790824000818-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158384","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":"Clean and durable thick nanodiamond composite hard coating deposited on cemented carbide towards sustainable machining: Eco-friendly fabrication, characterization, and 3-E analysis","authors":"Mohamed Egiza ,&nbsp;Mohamed Ragab Diab ,&nbsp;Ali M. Ali ,&nbsp;Koki Murasawa ,&nbsp;Tsuyoshi Yoshitake","doi":"10.1016/j.clet.2024.100804","DOIUrl":"10.1016/j.clet.2024.100804","url":null,"abstract":"<div><p>This research explores a sustainable approach for fabricating high-performance nanodiamond composite (NDC) hard coatings for dry machining. Aiming to address limitations in conventional coatings, such as environmental concerns, restricted film thickness, and compromised performance. The study utilizes Coaxial Arc Plasma Deposition (CAPD), a clean and efficient technique, to deposit thick (10 μm) NDC films directly on WC−Co substrates without chemical etching. Compared to traditional Chemical Vapor Deposition (CVD), CAPD offers significant advantages: lower temperature deposition, faster growth rate, and precise control over film thickness and morphology. The resulting NDC films boast exceptional durability due to their unique nanostructure, diamond nanocrystallites embedded in an amorphous carbon matrix. The addition of Al-interlayers (100–500 nm thickness) optimizes film properties. The optimal interlayer at 100 nm thickness not only mitigates the catalytic effects of Co but also enhances film hardness (50.4–58 GPa), Young's modulus (516–613.75 GPa), and adhesion (13–18.5 N) compared to films without an interlayer. Notably, the 100 nm Al-interlayer triples the deposition rate to 3.3 μm/h, achieving the desired thickness for effective hard coatings. The high density of grain boundaries within the films allows for exceptional stress release, enabling this increased thickness. Furthermore, these grain boundaries and the graphitic phase contribute to the film's superior tribological performance – a low coefficient of friction (0.1) and minimal wear rate (1.5 × 10⁻⁷ mm³/N⋅m) under dry machining conditions. These findings demonstrate the immense potential of CAPD-deposited NDC films as a sustainable alternative for advanced cutting tools, promoting environmental responsibility, economic viability, and energy efficiency.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100804"},"PeriodicalIF":5.3,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000843/pdfft?md5=70a8531d7dc6478930ac749c381f1b26&pid=1-s2.0-S2666790824000843-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150791","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 systematic literature review on the evolution of sustainable manufacturing practices: Key findings and implications","authors":"Koppiahraj Karuppiah ,&nbsp;Bathrinath Sankaranarayanan ,&nbsp;Huai-Wei Lo","doi":"10.1016/j.clet.2024.100798","DOIUrl":"10.1016/j.clet.2024.100798","url":null,"abstract":"<div><p>Increased societal awareness, stakeholder pressure, stringent environmental norms, and the need to sustain in the competitive business market have demanded environment-friendly manufacturing practices from the industrial communities. Sustainable manufacturing (SM) practices have gained widespread attention as they aim to balance economic, environmental, and social activities of organizations. However, still there is a lacuna in understanding the concept of SM practices and there is a need to monitor the developments related to SM practices. Thus, there is a need to conduct a comprehensive review study for an improved understanding of the progress of SM practices. Accordingly, this study aims to identify various strategies followed by organizations for implementing SM practices. To identify various strategies, 89 articles were selected from the SCOPUS database (published between 2012 and 2022). These 89 articles were selected by using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) framework, a systematic literature review (SLR) technique. The selected articles were investigated based on year, journals, country, research methods, focused industry, and techniques followed. Bibliometric and network analysis were performed to establish cluster domains and to identify evolving research areas. Bibliometric analysis reveals that currently, the industrial communities is emphasizing circular economy models for SM practices. Network analysis identifies six domains of SM practices: lean manufacturing, renewable energy adoption, green manufacturing, life cycle assessment, zero waste manufacturing practices, and circular economy model. To conclude, the important contribution of this study is that it tracks the progress of SM practices over the years and highlights current SM practices.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100798"},"PeriodicalIF":5.3,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000788/pdfft?md5=4da39ff97116c2471e64c294a696f51c&pid=1-s2.0-S2666790824000788-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097816","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 comprehensive analysis of repurposing abandoned oil wells for different energy uses: Exploration, applications, and repurposing challenges","authors":"Ajan Meenakshisundaram,&nbsp;Olusegun Stanley Tomomewo,&nbsp;Laalam Aimen,&nbsp;Shree Om Bade","doi":"10.1016/j.clet.2024.100797","DOIUrl":"10.1016/j.clet.2024.100797","url":null,"abstract":"<div><p>The rise in abandoned oil wells across the globe poses a serious environmental and public health risk. These wells, which are frequently abandoned by defunct corporations or owing to regulatory gaps, pose substantial risks. They have the potential to leak methane, a potent greenhouse gas, and contaminate groundwater. Researchers estimate that there are between 2 and 3 million abandoned oil and gas wells in the United States. Out of these, over 117,000 wells, spread across 27 states, are classified as “orphaned”, and lack an identifiable party responsible for managing leakage or pollution risks. The escalating number of abandoned oil wells in the United States presents a dual challenge and opportunity in the realm of renewable energy. The global utilization of geothermal energy is on the rise, with approximately 72 countries harnessing this resource for various applications. About 24 of these countries generate electricity using geothermal energy through binary or flash cycle methods. The United States leads in geothermal electricity production, generating approximately 17,917 GWh annually. Global raise in geothermal energy utilization provides presents an opportunity to repurpose abandoned oil wells for geothermal energy production especially in the United States. These wells, often still possessing high temperatures and temperature gradients, can be converted into valuable geothermal resources, thus providing a sustainable energy solution and addressing the environmental hazards posed by the abandoned wells. This paper critically examines the feasibility of repurposing these wells for geothermal energy production, a strategy that offers a promising solution to both environmental hazards and the need for sustainable energy sources. Focusing on the technical, economic, and social dimensions, we present a comprehensive analysis that includes a case study of the Williston Basin in North Dakota, highlighting its potential for geothermal exploitation. Our approach employs Fourier's law of conduction to estimate the temperature at the bottom of selected wells. We address the critical challenges in this endeavor, ranging from ensuring the mechanical integrity of aging wells to navigating the economic and social implications of their repurposing. Our findings suggest that while significant challenges exist, especially in retrofitting old wells for new uses and garnering stakeholder consensus, the conversion of abandoned oil wells into geothermal energy sources is a viable and environmentally beneficial path forward. Finally representing a detailed exploration of their various potential geothermal and various applications This research contributes to the growing body of literature on sustainable energy solutions, offering practical insights and guidelines for future field implementations in the transition from fossil fuels to renewable energy sources.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100797"},"PeriodicalIF":5.3,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000776/pdfft?md5=8c7cab0fad9a024505ebf8d580c6543d&pid=1-s2.0-S2666790824000776-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142087788","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":"Closed loop mechanical recyclability of post-consumer waste wool fabrics based on fibre length retention","authors":"M.J. Glasper ,&nbsp;G. Picerno ,&nbsp;M. Tausif ,&nbsp;S.J. Russell","doi":"10.1016/j.clet.2024.100796","DOIUrl":"10.1016/j.clet.2024.100796","url":null,"abstract":"","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100796"},"PeriodicalIF":5.3,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000764/pdfft?md5=5c35894e20412cd168b7eda47a25b012&pid=1-s2.0-S2666790824000764-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142048620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The fate of hazardous textile pollutants in an upcycling process for post-consumer garments","authors":"Tim Åström ,&nbsp;Maria-Ximena Ruiz-Caldas ,&nbsp;Lisa Skedung ,&nbsp;Ioana Chelcea ,&nbsp;Charlotte Nilsson ,&nbsp;Aji P. Mathew ,&nbsp;Ioannis Sadiktsis ,&nbsp;Ulrika Nilsson","doi":"10.1016/j.clet.2024.100794","DOIUrl":"10.1016/j.clet.2024.100794","url":null,"abstract":"<div><p>The environmental impact is a strong incentive for the development of upcycling processes for textile waste. However, toxic chemicals may occur in both brand-new textiles and post-consumer garments, and the chemical transfer in such routes is important to investigate. The present study applied non-target screening and quantification with liquid chromatography/mass spectrometry to follow the fate of hazardous chemicals from post-consumer polycotton garments to a new material, cellulose nanocrystals, in a chemical upcycling utilizing strongly acidic conditions. The majority of hazardous chemicals detected within the process were found to be transferred to a residual of polyester material and not to the enriched cellulose. However, phthalates were found to be mainly attached to the cellulose nanocrystals. The detected total concentration, in this case, was below 5 μg/g, at least 200 times lower than the limit set by the European Union. This indicates the importance of monitoring and controlling the phthalate content in the starting material of the process, i.e., the post-consumer garments. The chemical release into the process waste effluent could be estimated based on water solubility data for chemicals under the applied conditions. Three compounds, the water-repellent substance perfluorooctanesulfonic acid and the dyes Crystal Violet and Victoria Pure Blue, were almost entirely transferred into the process waste effluent. Although the levels detected were very low in the present pilot process, their presence eventually indicates the need for wastewater purification at further upscaling, depending on the exposure and dose in relation to toxicological relevant thresholds.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100794"},"PeriodicalIF":5.3,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000740/pdfft?md5=b9cfb7c3e4e821d6c9d65b520e2d9b4b&pid=1-s2.0-S2666790824000740-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142048619","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":"Physicochemical, mechanical and thermal analysis of unfired clay bricks: Kaolinite-PEG 6000 composite","authors":"Rachid Et-tanteny ,&nbsp;Bouchta El Amrani ,&nbsp;Imad Manssouri ,&nbsp;Houssame Limami","doi":"10.1016/j.clet.2024.100793","DOIUrl":"10.1016/j.clet.2024.100793","url":null,"abstract":"<div><p>This study aims to evaluate the potential of polyethylene glycol (PEG 6000), a recycled material, as an additive to improve unfired clay bricks. By proposing a sustainable alternative to traditional methods potentially linked to medical waste. This research explores the physicochemical, mechanical and thermal properties of unfired clay bricks modified by different contents of PEG 6000 (0%, 1%, 3%, 7%, 15% and 20% by weight) according to the standard NM 13.1 0.0442005. The testing methods comply with recognized building sector standards (Belgian NBN EN 771-3+A1 and American ASTM C675-17). The clay used was extracted from Berrechid city and it is identified as kaolinite and some trace of illite, which has non-swelling properties. The incorporation of PEG 6000 into the unfired clay bricks has notably reduced the porosity rate from 3.91 % to 1.21 %, an improvement of 69 % compared to the reference sample, leading to a decrease in the rate of capillary water absorption. The bulk density of the bricks has slightly decreased to 1670.07 kg/m³, which still allowed them to be classified as light bricks. The incorporation of 7% of PEG 6000 increased compressive strength and flexural strength up to 15.98 MPa and 0.959 KN respectively, an improvement of 63.23 % compared to the reference sample, making them suitable for the construction of interior and exterior walls according to the standard NBN EN 771-3+A1. However, thermal conductivity and specific heat capacity have been improved by 42.22 % compared to the reference sample, reaching 0.26 W/m.K and 0.89 kJ/kg.K respectively. Optimization showed that 7% of PEG 6000 is the optimal percentage for manufacturing high-performance bricks, taking into account all properties studied previously. Moreover, the simulations carried out by the TRANSYS software suggest significant energy gains in terms of insulation, achieving up to 58.33% energy savings. In essence, this research demonstrates the potential of PEG 6000 as a sustainable additive for unfired clay bricks, offering improved properties and promising energy efficiency benefits.</p></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"22 ","pages":"Article 100793"},"PeriodicalIF":5.3,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666790824000739/pdfft?md5=d58de3241cf4badec0f42e9cb782c011&pid=1-s2.0-S2666790824000739-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991259","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}