Cleaner Engineering and Technology最新文献

{"title":"A tiered NARX model for forecasting day-ahead energy production in distributed solar PV systems","authors":"","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":null,"pages":null},"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":"","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":null,"pages":null},"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":"","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":null,"pages":null},"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":"Predicting the most economical option of managing electric vehicle battery at the end of its serviceable life","authors":"","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":null,"pages":null},"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":"","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":null,"pages":null},"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}

{"title":"The potential effects of window configuration and interior layout on natural ventilation buildings: A comprehensive review","authors":"","doi":"10.1016/j.clet.2024.100830","DOIUrl":"10.1016/j.clet.2024.100830","url":null,"abstract":"<div><div>Natural ventilation is an eco-friendly and renewable energy source that enhances thermal comfort and energy efficiency. The window is the most traditional method of introducing natural ventilation into the built environment, but its full potential has been slow to be explored. The indoor arrangement of naturally ventilated buildings must be effectively managed to ensure indoor thermal comfort and ventilation efficiency. Although the windows offer a number of advantages for natural ventilation, they can be challenging to implement in real occupied conditions due to the integrated design between façade and interior arrangement. A comprehensive review aims to investigate the potential factors that influence the performance of natural window ventilation. The overall findings show that wind-driven cross-ventilation and single-sided ventilation are the most extensively studied natural window ventilation strategies. However, the topics of corner ventilation and buoyancy-driven ventilation do not receive much attention. The findings highlight that appropriate window designs, including factors such as window geometry, opening ratio, number of openings, location, type, orientation, and shading systems, can maintain thermal comfort, reduce cooling loads, extend ventilation period, and improve indoor air quality. In addition, it has been discovered that the geometric and thermal properties of indoor obstructions determine the advantages and limitations of local thermal comfort and airflow patterns in different scenarios. The necessity for further studies on the effects of interior conditions on natural window ventilation is argued, as it is a crucial issue for ensuring accurate results. The review of recent literature contributes to categorizing the influential factors and identifying the important aspects to be considered in natural window ventilation. Through this literature review, further research is encouraged to fully exploit the potential for integrating interior factors and window characteristics in the design of low-energy buildings.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527326","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 ibuprofen removal using enzymatic activated ZIF-8-PVDF membranes","authors":"","doi":"10.1016/j.clet.2024.100824","DOIUrl":"10.1016/j.clet.2024.100824","url":null,"abstract":"<div><div>This study investigated the development of poly(vinylidene fluoride) (PVDF) hybrid ultrafiltration membranes, where ZIF-8 nanocrystals are synthesized in situ within the membrane pores. These ZIF-8 embedded membranes are specifically designed for the treatment of emerging pollutants, such as ibuprofen. The optimized membrane, characterized by a higher concentration of ZIF-8 and greater surface coverage, exhibited significantly enhanced performance and improved properties, including increased hydrophobicity and mechanical strength. By increasing the zinc concentration from 0.2 to 0.3 M during the preparation of the ZIF-8 coated membrane, hydrophobicity was enhanced, as indicated by an increase in the contact angle from 60.3° to 87.2°, along with improved porosity from 41.3% to 60.5%. Further performance enhancements were achieved by encapsulating enzymes, specifically laccase and peroxidase, within the ZIF-8 coated membrane. A comparison of ibuprofen removal by these enzymes showed that peroxidase was slightly more effective, reaching a maximum removal efficiency of approximately 45% within 2 h. The biocatalytic membranes demonstrated a high stability and reusability, underscoring their potential for efficient ibuprofen removal. These findings highlight the efficacy of ZIF-8-coated PVDF membranes as advanced tools for water purification, offering significant improvements in both purification efficiency and membrane stability.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527321","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":"Transforming waste into valuable resources: Recycled nitrile-butadiene rubber scraps filled with electric arc furnace slag","authors":"","doi":"10.1016/j.clet.2024.100823","DOIUrl":"10.1016/j.clet.2024.100823","url":null,"abstract":"<div><div>This study investigates the valorization of two industrial waste streams - nitrile butadiene rubber (NBR) scraps and electric arc furnace (EAF) slag – in the development of recycled NBR compounds filled with EAF slag as filler. A new recycling method for NBR scraps is employed via calendering at room temperature without the need for curatives, chemical agents, or pre-grinding. The resulting recycled NBR is then used as a matrix for EAF slag particles to produce sustainable rubber compounds that are entirely recycled. Characterization reveals that incorporating EAF slag enhances the devulcanization process of recycled NBR during recycling. The filler grain size affects composite properties like hardness, crosslink density, and tensile modulus, with finer slag particles (&lt;50 μm) exhibiting improved reinforcement due to increased interaction surface with the rubber matrix. Dynamic mechanical analysis indicates that recycled NBR filled with EAF slag exhibits a more significant Payne effect compared to unfilled recycled NBR, due to filler-matrix interactions. Interestingly, EAF slag facilitates the rapid fractional recovery of the low-strain storage modulus after experiencing high-amplitude strain, ascribed to the formation of a rigid rubber layer around the slag particles.</div><div>Overall, the findings highlight the potential to valorize these two waste materials effectively by producing functional recycled NBR/EAF slag composites with desirable properties through a simple, industrially viable recycling method without capital-intensive equipment. This represents both environmental and economic benefits through waste valorization and industrial symbiosis.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527322","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":"Enhanced methylene blue degradation and miniralization through activated persulfate coupled with magnetic field","authors":"","doi":"10.1016/j.clet.2024.100822","DOIUrl":"10.1016/j.clet.2024.100822","url":null,"abstract":"<div><div>In this work, for the first time, the effectiveness of the degradation and mineralization process of methylene blue) MB) was investigated using activated persulfate (PS) with a magnetic field. The effect of various operating parameters, including pH, PS (5–20 mg/L), intensity of the magnetic field (1–4 A), initial concentration of methylene blue dye (25–100 mg/L), and contact time (30–120 min), was evaluated. Process optimization was conducted via the Taguchi model, and the optimal values of these factors were found to be pH = 5, PS = 10 mg/L, MFs = 4 A, reaction time = 30 min, and the initial concentration of methylene blue dye = 50 mg/L. Under optimal conditions, the methylene blue removal efficiency and TOC destruction efficiency reached 91.8% and 88%, respectively. The kinetics of the process followed pseudo-second order (R² = 0.9723). According to the promising results of the research, the efficiency of dye purification using a magnetic field has increased by about three times compared to the state without this factor. It can be suggested that this system be used as a wastewater treatment process for the textile industry to reduce the toxicity of wastewater and total organic carbon (TOC).</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527323","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 advances in harnessing biolubricants to enhance tribological performance and environmental responsibility – Bibliometric review (2015–2024)","authors":"","doi":"10.1016/j.clet.2024.100821","DOIUrl":"10.1016/j.clet.2024.100821","url":null,"abstract":"<div><div>The necessity of conducting research on biolubricants arises from the urgent need to develop sustainable alternatives to conventional petroleum-based lubricants, which contribute to environmental degradation and carbon emissions. As biolubricants offer eco-friendly lubrication solutions, exploring their development and performance is essential to advancing sustainable technologies and achieving global net zero emissions targets. This paper aims to comprehensively plot scientific research outputs on biolubricant manufacturing and recent developments using a quantitative review technique known as bibliometric analysis. The 1000 publications were extracted from the Web of Science database and evaluated with the VOSviewer software. The study examines biolubricants' ability to support sustainability efforts, particularly through their lubrication properties, alignment with Sustainable Development Goals (SDGs), and enhancement with nanomaterials. It also identifies future trends and addresses biolubricants' limitations. The research highlights the significance of the field, with leading journals such as Industrial Crops and Products (34 articles), Tribology International (31 articles), and the Journal of Cleaner Production (29 articles) contributing extensively. The citations and document correlations analysis reveals 742 articles, grouped into 182 publication clusters, showcasing a robust network of influential research. Ongoing bibliometric evaluation is critical for identifying key developments, gaps, and opportunities in sustainable lubrication technologies.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527328","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}