Cleaner Engineering and Technology最新文献

{"title":"Guidelines for implementing cleaner production strategies in a natural rubber gloves manufacturing industry","authors":"Muthukannan M ,&nbsp;S. Saravanakumar ,&nbsp;M.T. Sambandam ,&nbsp;Umapathi K ,&nbsp;R. Kamalakannan","doi":"10.1016/j.clet.2024.100837","DOIUrl":"10.1016/j.clet.2024.100837","url":null,"abstract":"<div><div>Production of gloves is a highly energy-intensive and process-driven industry. It demands a significant amount of electrical as well as thermal energy. This paper presents the results and recommendations devised from an enquiry based onsite energy audit conducted in a gloves manufacturing unit. It summarizes the current energy demand of the manufacturing unit, highlights the major energy hunters, identifies energy saving and alternate energy generation possibilities, as well as proposes recommendations for betterment. The audit results for all different equipment are included in the report, along with suggested modifications and energy-saving achieved. The findings are still applicable as of the date and duration of the visit to the facility. As these businesses expand, minimizing expenses through energy-saving measures becomes especially crucial. At present, the gloves plant consumed about 291.278 MWh/month of electrical energy and 1830330 kcal/h of heat energy. The plant emits about 445.67 kg of CO₂ equivalent for every metric ton of natural rubber. Based on the audit, recommendations are proposed to install energy monitoring devices and replacing energy hunting motors and V-belts with efficient ones. In addition, as a step towards green economy, it is recommended to consider implementing energy plantation and biogas generation plants. By implementing the proposed energy saving measure about 215.930 MWh of energy can be conserved per year. This accounts for about (15–40)% of overall energy saving and this directly reduces CO₂ emission too.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100837"},"PeriodicalIF":5.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656721","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":"Optimization of alkali-activated ladle slag-fly ash composites using a Taguchi-TOPSIS hybrid algorithm","authors":"Omar Najm ,&nbsp;Hilal El-Hassan ,&nbsp;Amr El-Dieb","doi":"10.1016/j.clet.2024.100836","DOIUrl":"10.1016/j.clet.2024.100836","url":null,"abstract":"<div><div>The effect of multiple mix design factors on the properties of ladle slag-fly ash alkali-activated composites was investigated. Taguchi-TOPSIS hybrid algorithm was adopted to optimize mix design parameters, including ladle slag replacement by fly ash (LSR), sodium hydroxide molarity (SHM), the ratio of sodium silicate to sodium hydroxide (NS/NH), the ratio of alkaline activator solution to binder (AAS/B), and crushed stone replacement by desert dune sand (CSR). The results revealed that the mix proportions of the optimum strength response comprised LSR, AAS/B, SHM, NS/NH, and CSR of 10%, 0.5, 8 M, 2, and 75%, respectively, with a compressive strength of 21 MPa. Conversely, the mixture proportions for superior fresh properties had a flow of 240 mm and entailed LSR, AAS/B, SHM, NS/NH, and CSR of 40%, 0.5, 8 M, 2.5, and 75%, respectively. Additionally, the hybrid method prediction model proved to be robust, with the ability to predict strength and workability at 93 and 100% accuracy. The optimum mixes comprised an intermix of calcium aluminosilicate hydrate and sodium aluminosilicate hydrate gels, with traces of calcium silicate hydrate gel, as identified by microstructure analysis and using ternary diagram system of Ca/Si-Na/Si-Al/Si ratios.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100836"},"PeriodicalIF":5.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656709","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":"How does the use of cryptocurrency affect circular economy practices in Iranian manufacturing companies?","authors":"Mohammad Hossein Ronaghi ,&nbsp;Azade Fallahi","doi":"10.1016/j.clet.2024.100835","DOIUrl":"10.1016/j.clet.2024.100835","url":null,"abstract":"<div><div>In nations facing international pressures, such as sanctions, leaders should attempt to utilize advanced technologies more effectively, while fostering the skills and intelligence of the human resources, and enhancing public confidence in the use of emerging technologies in Industry 5.0. In this article our goal is to investigate the effect of acceptance and use of cryptocurrencies on the circular economy. The theoretical contribution of this research is to enrich the literature related to the factors affecting the adoption of digital currencies and its impact on the circular economy. Also, due to the importance of technology mindfulness in Industry 5, its effect on the adoption of digital currencies was evaluated. For several decades, Iran has been exposed to political and economic sanctions by the United Nations Security Council, the US, and the European Union (EU). Given the importance of natural resources in Iran's economy, and the presence of barriers regarding financial transactions, all manufacturing companies working in Iran were selected as the statistical population of the current study. The findings showed that variables like the realized ease of use, the realized efficiency, trust, technological mindfulness and social influence have been effective on the acceptance and use of cryptocurrencies. Also, use of cryptocurrencies in manufacturing companies has had effect on the circular economy activities. The other research results revealed that the factor of economic sanction in the studied society might have effect on the use of cryptocurrencies and consequently companies' circular economy. The policy-makers active in the field of the environment, and also managers of manufacturing companies by creating an infrastructure for financial exchange based on digital currency can provide the needed ground for production in line with the environment and sustainable resource management.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100835"},"PeriodicalIF":5.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656707","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 effects of joint process parameters of two-step manufacturing processes on the mechanical performance of biocomposites using Taguchi and multiple regression techniques","authors":"Lucky Ogheneakpobo Ejeta","doi":"10.1016/j.clet.2024.100832","DOIUrl":"10.1016/j.clet.2024.100832","url":null,"abstract":"<div><div>This study evaluates the influence of joint parameters of extrusion (extrusion profile temperature) and injection molding (barrel profile temperature and mold temperature) manufacturing processes on the mechanical performance of biocomposite materials via the Taguchi and multiple regression techniques. Statistical analysis of variance (ANOVA) was performed to determine the most influential controllable factors for the individual responses. The results of the study revealed that the mechanical properties of the biocomposites are affected by the joint parameters of the two-step manufacturing techniques. This study will help in the process design of biocomposites with improved mechanical performance.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100832"},"PeriodicalIF":5.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656706","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 tiered NARX model for forecasting day-ahead energy production in distributed solar PV systems","authors":"Sameer Al-Dahidi ,&nbsp;Mohammad Alrbai ,&nbsp;Bilal Rinchi ,&nbsp;Loiy Al-Ghussain ,&nbsp;Osama Ayadi ,&nbsp;Ali Alahmer","doi":"10.1016/j.clet.2024.100831","DOIUrl":"10.1016/j.clet.2024.100831","url":null,"abstract":"<div><div>This study presents a hierarchical forecasting approach for day-ahead energy production in distributed solar Photovoltaic (PV) systems using a tiered Nonlinear Autoregressive Exogenous (NARX) model. The methodology was applied to 52 PV systems installed at The University of Jordan, covering three prediction scales: fleet-wide, zone-specific, and site-specific. The model incorporated weather data, including solar irradiation, temperature, and humidity, to forecast the next day's energy production. Based on a new metric called the <span><math><mrow><mi>O</mi><mi>v</mi><mi>e</mi><mi>r</mi><mi>a</mi><mi>l</mi><mi>l</mi><mspace></mspace><mi>M</mi><mi>e</mi><mi>t</mi><mi>r</mi><mi>i</mi><mi>c</mi></mrow></math></span>, fleet-wide predictions outperform the zone-specific and site-specific averages by 3.21% and 5.35%, respectively. Normalized Root Mean Square Errors (<span><math><mrow><mi>n</mi><mi>R</mi><mi>M</mi><mi>S</mi><mi>E</mi></mrow></math></span>) for fleet-wide, zone-specific, and site-specific predictions are 0.148, 0.141, and 0.137, respectively. The Correlation Coefficient (<span><math><mrow><mi>R</mi></mrow></math></span>) is above 80% for all prediction scales, with the accuracy constrained by the model's difficulty in adapting to abrupt weather changes, leading to overestimation. The model performs best when weather patterns and PV generation are consistent with previous days. This demonstrates that adapting models to the characteristics of each scale significantly improves forecast accuracy, enabling more effective macro-level planning and micro-level operational decisions.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100831"},"PeriodicalIF":5.3,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578144","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":"Comprehensive methodology for the integrating of the organic rankine Cycle-ORC with diesel generators in off-grid areas: Application to a Colombian case study","authors":"Ana Lisbeth Galindo Noguera ,&nbsp;Luis Sebastian Mendoza Castellanos ,&nbsp;Hernán Darío Pedraza-Corzo ,&nbsp;Dimas José Rua ,&nbsp;Electo Eduardo Silva Lora ,&nbsp;Vladimir Rafael Melian Cobas","doi":"10.1016/j.clet.2024.100828","DOIUrl":"10.1016/j.clet.2024.100828","url":null,"abstract":"<div><div>Efficient fuel management in diesel generator sets for power generation in non-grid areas is a persistent concern. In this context, the use of an Organic Rankine Cycle (ORC) to recover heat from exhaust gases from diesel generator sets represents a promising route for additional power generation. To undertake such projects, it is necessary to understand the critical parameters related to diesel engines, including the specific fuel consumption, mass flow, and exhaust gas temperature. These parameters are fundamental to the sizing process of the ORC heat recovery system. This study introduces an innovative methodology for evaluating the operation of diesel-ORC systems based on the load demand of off-grid communities. The proposed system is a viable solution for the generation of additional power with the objective of improving the overall efficiency and meeting higher energy demands in isolated areas. Four organic fluids were selected for the ORC: R245fa, benzene, cyclopentane, and toluene. This selection was made based on many criteria, including global warming potential (GWP), ozone depletion potential (ODP), and safety classification (ASHRAE 34). In addition, the exergy behaviors of these fluids were reviewed. A comparative analysis was subsequently conducted for a non-interconnected region of Colombia to evaluate the performance of a diesel generator operating independently and in conjunction with the diesel ORC system. The key indicators employed were fuel consumption savings (L/year), energy produced (MWh/year), levelized cost of energy (LCOE, USD/kWh), and payback period (years). The results demonstrated that, over the course of a 1-year simulation period, the benzene ORC system exhibited the highest overall energy efficiency, achieving a value of 41.38%. The exergy analysis indicated that toluene had lower irreversibilities, achieving an exergy efficiency of 44.78%, followed by benzene (43.5%. Furthermore, the diesel-ORC system using benzene demonstrated a notable decrease in the specific fuel consumption from 0.282 to 0.247 L/kWh, signifying a 10.52% reduction in the annual CO2eq emissions. The cost of electricity generation decreased by 4.3%, with investment payback periods not exceeding 14 years.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100828"},"PeriodicalIF":5.3,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552959","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":"Efficient defluoridation of drinking water using mesoporous magnetic malachite nanocomposites","authors":"Amna Sarwar ,&nbsp;Jin Wang ,&nbsp;Nadia Riaz ,&nbsp;Muhammad Saqib Khan ,&nbsp;Ajmal Khan ,&nbsp;Rafaqat Ali Khan ,&nbsp;Afnan Jan ,&nbsp;Anar Gojayev ,&nbsp;Ahmed Al-Harrasi ,&nbsp;Qaisar Mahmood","doi":"10.1016/j.clet.2024.100826","DOIUrl":"10.1016/j.clet.2024.100826","url":null,"abstract":"<div><div>The study evaluated the efficacy of magnetic mesoporous Malachite nanoparticles (NPs) in eliminating fluoride (F⁻) from drinking water. Screening experiments were conducted to gauge the F⁻ adsorption capabilities of the synthesized material under different Fe₃O₄ loading conditions. Among the various nanomaterials examined, 0.25-Fe-M demonstrated optimal performance, exhibiting consistent Fe₃O₄ distribution with a crystal size of 16.66 nm with revealed irregular morphology exhibiting magnetic properties, a surface area of 13.595 m²/g and a pore size of 1.6574 nm. The optimized reaction conditions determined were: 10 min of contact time, a NC dose of 0.5 mg/mL, and an F⁻ concentration of 10 mg/L. The maximum adsorption capacities recorded were 6.57 mg/g for Fe₃O₄ NPs and 7.87 mg/g for malachite NPs. Notably, the optimal adsorption capacity for F⁻ removal was achieved with 0.25 Fe-M-NCs, reaching 8.44 mg/g, demonstrating superior performance compared to other NCs. The interplay between surface area, pore volume, and adsorption is intricate and contingent upon the unique properties of the adsorbent and adsorbate, with specific interactions governing the adsorption process. Furthermore, this study unveiled accelerated adsorption with shorter contact time and high adsorption capacity at the working pH.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100826"},"PeriodicalIF":5.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551990","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":"Recent advancements and sustainable solutions in adsorption-based cooling systems integrated with renewable energy sources and industrial waste heat: A review","authors":"Sumit Kumar Singh ,&nbsp;Dibakar Rakshit ,&nbsp;K Ravi Kumar ,&nbsp;Anurag Agarwal","doi":"10.1016/j.clet.2024.100827","DOIUrl":"10.1016/j.clet.2024.100827","url":null,"abstract":"<div><div>This work aims to compile the factors that impact the adsorption system's performance. The functional performance and operations of adsorption cooling systems are greatly influenced by the mass and heat diffusion across the adsorber bed, adsorbates-adsorbent pairs, cycle type, cyclic period, and the adsorber bed design. Generally, enhancing heat transport across the bed will decrease the thermal resistance, shortening the cycle time and eventually increasing the COP. To enhance the operational efficiency of the adsorption system, researchers have explored a few more adsorption cycles in addition to those that have already been studied. Some of the typical cycles like the multiple-adsorber bed cycle, surface cascading adsorption cycle, thermal wave cycle, mass-recovery cycle, and heat recovery cycle, are discussed in this work, unlike the previous work, making it helpful for design basis and enhancing the system's performance. A system having numerous beds offers a continual cooling effect and having minimal dead mass operates more efficiently. Combining all the contributing elements listed above provides superior outcomes and efficient performance for adsorption cooling systems. Generally, adsorption cooling technology has been oversimplified which means they don't fully explain the detailed physics of adsorption cooling technology, making it less percolated and technically less efficient. Current studies aim to understand these complex intricate physics better so that the adsorption system can be improved and correlated with various notes of adsorption technology to make it more widely accessible for commercial use.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100827"},"PeriodicalIF":5.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656708","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":"Predicting the most economical option of managing electric vehicle battery at the end of its serviceable life","authors":"Lewis Parkinson,&nbsp;Wai Ming Cheung","doi":"10.1016/j.clet.2024.100829","DOIUrl":"10.1016/j.clet.2024.100829","url":null,"abstract":"<div><div>It is predicted that millions of electric vehicle batteries (EVBs) will retire in the next decade. With the global Electric Vehicles (EVs) market share increasing to over 40 million by 2030, the replacement of unwanted EVBs will become more abundant and may end up in landfills. These discarded EVBs can become a threat to the environment and to human health if they are not treated, disposed of, and recycled appropriately. Numerous end-of-life (EOL) cost estimation methods that have been developed are mainly for evaluating fossil fuel vehicle components. Research within the scope of EOL of EVBs however, is slow in progress, therefore, this work focuses on developing a cost estimation method for predicting EOL costs of EVBs by adopting a circular economy approach. This proposed method is validated through a case study using two Nissan's EV battery packs. The significance of this study may provide valuable information which could, indirectly lead to the redesign of EVBs for better business circular economy and less waste pollution for future EVs. The main results show that the potential economic benefit that generated by reusing/repurposing EOL EVBs is 92% more profitable than recycling and 52% more profitable than remanufacturing. This study concludes that reuse/repurpose becomes the most profitable process when EVBs reach the end of their serviceable life. Remanufacturing method can also be economically viable if it considers multi-cell replacement of an EVB.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100829"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527324","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":"Review of hydrocarbon refrigerants as drop-in alternatives to high-GWP refrigerants in VCR systems: The case of R290","authors":"Osama Abd Al-Munaf Ibrahim ,&nbsp;Saif Ali Kadhim ,&nbsp;Karrar A. Hammoodi ,&nbsp;Farhan Lafta Rashid ,&nbsp;Ali Habeeb Askar","doi":"10.1016/j.clet.2024.100825","DOIUrl":"10.1016/j.clet.2024.100825","url":null,"abstract":"<div><div>Global warming issues are of enormous interest to researchers and decision-makers. Some refrigerants have a large share of harmful emissions to the environment, so it is necessary to shed light on eco-friendly refrigerants and demonstrate the feasibility of using them as alternatives to environmentally harmful refrigerants. From this standpoint, this review examines studies on hydrocarbon refrigerants with emphasis on R290 as alternatives to high global warming potential refrigerants in various vapor compression refrigeration systems, especially air conditioners and refrigerators with small cooling capacities. Also, thermophysical and environmental properties, advantages and disadvantages of hydrocarbon refrigerants, especially R290, and compatibility with lubricants were explained. This review showed that hydrocarbon refrigerants have unique properties in terms of thermal performance, environmental friendliness, non-toxicity and compatibility with lubricants, but the problem of flammability poses some challenges and limitations. R290 refrigerant is a highly effective substitute, whether used alone or in combination, and is particularly suitable for household refrigerators and small air conditioners because of its small gas charge size, which is considered somewhat safe from explosion. Furthermore, R290 boasts a high coefficient of performance, provided that the system undergoes the required adjustments. Some studies have shown that in domestic refrigeration applications, R134a can be replaced with R290 but using a lower displacement compressor. In this regard, this review can be a valuable reference for researchers and developers.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"23 ","pages":"Article 100825"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527325","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}