Energy nexus最新文献

{"title":"Online non-intrusive load monitoring: A review","authors":"David Cruz-Rangel ,&nbsp;Carlos Ocampo-Martinez ,&nbsp;Javier Diaz-Rozo","doi":"10.1016/j.nexus.2024.100348","DOIUrl":"10.1016/j.nexus.2024.100348","url":null,"abstract":"<div><div>Significant progress has been achieved in managing energy consumption in the residential sector in recent years. However, the industrial sector requires better coverage due to its substantial challenges. Non-intrusive load monitoring (NILM) provides a solution for energy monitoring, enabling appliance tracking by observing only the aggregated energy consumption. The online information at the device level can offer deeper insights into the origin of energy consumption and facilitate the optimization of strategic load scheduling and demand management. Particularly in industrial settings, online NILM has become increasingly relevant, with potential benefits such as energy reduction, operational optimization, and improved productivity. This monitoring approach plays a crucial role in minimizing downtime, reducing maintenance costs, and extending the lifespan of industrial assets. This paper aims to contribute to this field by offering an overview of online disaggregation techniques. It begins with a contemporary review of NILM methodologies and examines techniques specifically designed for online applications. Additionally, the article details the hardware implementations associated with the discussed NILM approaches.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100348"},"PeriodicalIF":8.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178351","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":"Price disorder and information content in energy and gold markets: The effect of the COVID-19 pandemic","authors":"Salim Lahmiri","doi":"10.1016/j.nexus.2024.100343","DOIUrl":"10.1016/j.nexus.2024.100343","url":null,"abstract":"<div><div>In this paper, we examine market efficiency in fossil energy and gold markets. Specifically, we study price disorder and information content in various energy markets and in gold market before and during the COVID-19 pandemic. The set of energy markets include West Texas Intermediate (WTI), Brent, natural gas, heating oil, and gasoline. For each market, we estimated the correlation dimension, Lyapunov exponent, and approximate entropy for periods before and during the pandemic. In this regard, we contribute to the literature by using different nonlinear features to provide a rich description of the nonlinear dynamics in price evolution before and during the pandemic, considering five various energy and gold markets, and examining a longer and recent period spanning from November 2017 to November 2022. The empirical results show that, during the pandemic, complexity increased in gold and natural gas markets, stability strongly decreased in WTI and natural gas markets, and irregularity obviously increased in gold market but decreased in all energy markets. Besides, heating oil and gasoline markets appear to be unaffected by the COVID-19 pandemic especially in terms of complexity and stability compared to WTI, Brent, and gas markets. We conclude that the gold market maybe not attractive compared to energy markets for investors and traders during the pandemic. Besides, heating oil and gasoline markets offer interesting investment opportunities during the world economic downturn caused the outbreak of the pandemic.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"16 ","pages":"Article 100343"},"PeriodicalIF":8.0,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723784","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":"Interaction of molecular mechanisms of plant-derived metabolites in Type 2 diabetes mellitus: A network pharmacology, docking and molecular dynamics approach on AKT1 kinase","authors":"Ekambaram Gayathiri ,&nbsp;Palanisamy Prakash ,&nbsp;Somdatta Y. Chaudhari ,&nbsp;Sarvesh Sabarathinam ,&nbsp;Subramanian Deepika Priyadharshini ,&nbsp;Mohammad K. Al-Sadoon ,&nbsp;Jithendra Panneerselvam ,&nbsp;Soon Woong Chang ,&nbsp;Balasubramani Ravindran ,&nbsp;Ravishankar Ram Mani","doi":"10.1016/j.nexus.2024.100351","DOIUrl":"10.1016/j.nexus.2024.100351","url":null,"abstract":"<div><h3>Background</h3><div>T2DM is a common metabolic disease with enormous effects on health worldwide; moreover, the use of phytochemicals as therapeutic compounds has drawn increasing attention. Therefore, the objective of this study was to assess the effectiveness of these phytochemicals in combating diabetes through a comprehensive evaluation of their interactions with biological networks through network pharmacology, molecular docking, and molecular dynamics simulations.</div></div><div><h3>Objectives</h3><div>The first goal of this study was to search and screen potential phytochemicals for binding with key proteins involved in T2DM, with special emphasis on AKT1 kinase, an integral component of the insulin signaling pathway.</div></div><div><h3>Methods</h3><div>Network pharmacology analysis was carried out, and the interaction network of targets associated with T2DM was generated using KEGG, STRING and Cytoscape 3.9.1 software's. To determine the specific metabolic processes, cellular compartments, and molecular functions involved in T2DM, we performed Gene Ontology and KEGG analyses. An initial and short molecular docking study was conducted to analyze the binding modes, while the molecular dynamics simulations provided insights into the binding energy and stability of phytochemicals at target sites, with emphasis on rutin engaged with AKT1.</div></div><div><h3>Results</h3><div>In total, 10 hub genes were proposed to be involved in T2DM and can be considered candidate therapeutic targets, namely MTOR, CASP3, CCND1, TNF, MMP9, ALB, MDM2, AKT1, and HSP90AA1. Rutin was found to have the highest binding score for AKT1 in docking studies, while MD simulations identified the structural stability and persistence of the compound's activity at the target enzyme loci.</div></div><div><h3>Conclusions</h3><div>This study identified rutin and flavonoids as potential anti-diabetes phytochemicals. Based on these observations, an opportunity for other in vitro experiments and additional in vivo studies to confirm these buildings as multi-target drugs in T2DM patients is provided.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100351"},"PeriodicalIF":8.0,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177885","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 biogas production from water hyacinth and cow dung with wood and faecal sludge biochar","authors":"Robinah N. Kulabako ,&nbsp;Swaib Semiyaga ,&nbsp;Rodney S. Tumwesige ,&nbsp;Collin Irumba ,&nbsp;Miria I. Opio ,&nbsp;Musa Manga ,&nbsp;Vianney Tumwesige ,&nbsp;Jessica Quintana-Najera ,&nbsp;Andrew B. Ross","doi":"10.1016/j.nexus.2024.100342","DOIUrl":"10.1016/j.nexus.2024.100342","url":null,"abstract":"<div><div>Water hyacinth (WH), known for its ecotoxicity and economic burden in tropical regions, can play an important role as a lignocellulosic biomass source for biogas production. Co-digesting WH with cow dung (CD) enhances biogas yield but poses challenges like process instability and excessive carbon dioxide production. To improve biogas yield from digestion of WH and CD, this study examined the impact of wood and faecal sludge biochar on the anaerobic co-digestion of CD and WH using a temperature of 37 °C for 40 days. In the controlled laboratory tests, cow dung alone produced the least methane (CH₄), but introducing 2 % wood and faecal sludge biochars significantly boosted CH₄ production by 76.8 % and 94.0 %, respectively. However, a 50 % CD-50 % WH mixture, the CH₄ increase was milder at 20 % and 37 %, respectively. Wood biochar had no significant effect while faecal sludge biochar made a statistically significant impact (<em>P</em> &lt; 0.05). These findings offer a sustainable solution, paving the way for cost-effective and eco-friendly biogas production in regions plagued by this invasive plant. The use of faecal sludge biochar, in particular, has substantial implications for optimizing anaerobic digestion processes and reducing their environmental footprint, thereby promoting a more sustainable approach to managing WH and addressing energy needs in tropical, eutrophic regions.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100342"},"PeriodicalIF":8.0,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177883","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 review on Linear Fresnel Reflector (LFR) as a solar line concentrator in polygeneration for low-medium temperature applications among the rural livelihoods","authors":"Sanju John Thomas ,&nbsp;Sudhansu S. Sahoo ,&nbsp;Sheffy Thomas ,&nbsp;Ajith Kumar G ,&nbsp;Mohamed M. Awad","doi":"10.1016/j.nexus.2024.100340","DOIUrl":"10.1016/j.nexus.2024.100340","url":null,"abstract":"<div><div>Rural electrification is exhaustive, costly, and lacks paybacks while renewable energy interventions are policy-influenced usually taking a top-down approach. The livelihood activities are energy intensive, while specific in nature and requirement. There exists an inherent nexus among rural livelihoods between energy-water-food, which is often not explored., while polygeneration and cogeneration methods can benefit this nexus. Parabolic trough collectors (PTC), heliostats, and Linear Fresnel Reflectors (LFR) are solar concentrators used for high-temperature steam generation. The LFR has the advantage of easy installation, reduced structures, good optical efficiency, flexible designs, and direct steam generation at a temperature range of 80 C - to 400 C, which can be a techno-commercial competitor for evacuated tube collectors (ETC) and PTC. An extensive review of the energy requirement in various rural livelihoods and the potential of solar concentrators with a focus on the PTC and LFR, with their limitation and the advantages are done. While the LFR can match the optical efficiency of the PTC, it is found that the two-phase flow and the entropy generation are the limitations, while easy installations, custom designs, and reduced structures are the advantages over the PTC. The review and comparison have found that there is a difference between the thermal energy produced per mirror area and the land area with respect to PTC and the LFR. Concerning application in the diary industry, it is found that with the modifications in LFR, the thermal energy produced per square meter of land by LFR can be 300 MW_h/m^2, while the PTC produces 225 MW_h / m² in comparison with 180 MW_h /m². This shows that LFR modifications including reduced receiver height, inclined mirror, and double reflectors can make it the ideal solar collector for rural livelihood applications for low-medium heat requirements.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100340"},"PeriodicalIF":8.0,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177880","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 critical review on enhanced bioethanol production from sweet sorghum using nanotechnology","authors":"Pallavi Punia,&nbsp;Sumeet Kumar","doi":"10.1016/j.nexus.2024.100339","DOIUrl":"10.1016/j.nexus.2024.100339","url":null,"abstract":"<div><div>Biofuel, a sustainable fuel source, is crucial in the modern day as it reduces reliance on non-renewable energy sources and helps to reduce CO₂ emissions. The manufacture of biofuels on a wide scale is a difficult process due to the numerous limitations in current technology and the subsequent rise in expenses. Moreover, the processes employed to transform diverse raw materials into the desired biofuel may differ depending on the particular methodologies and substances utilized. The global demand for bioethanol is growing as countries throughout the world enforce legislation requiring the blending of bioethanol with gasoline. Second-generation bioethanol derived from lignocellulosic biomass is rapidly gaining prominence. The biochemical conversion process has various technical, practical, and economic challenges such as pre-treatment, hydrolysis, and fermentation. Nanoparticles (NPs) offer a highly efficient solution for overcoming current challenges in utilizing biomass, thanks to their selectivity, energy efficiency, and time management capabilities, all while reducing prices. Also, the biotechnological significant advancement in revolutionized the sorghum varieties or strains to enhance the yield of ethanol. This article offers a succinct summary of bioethanol from sweet sorghum feedstock and the progress made in using nanotechnology to produce them, with a specific focus on the enzyme immobilization approach. The text offers an in-depth exploration of how nanotechnology is utilized across ethanol production, with a specific focus on comprehending the process by which enzymes immobilized on nanoparticles interact with lignocellulose to enhance the output of ethanol.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100339"},"PeriodicalIF":8.0,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757268","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":"Energy security assessment in rural communities in Brazil: A contribution to public policies","authors":"Wesly Jean ,&nbsp;Marcel Bursztyn ,&nbsp;Elton S. Oliveira ,&nbsp;Júlia Lopes ,&nbsp;Guadalupe Sátiro ,&nbsp;Saulo Rodrigues Filho ,&nbsp;Diego Lindoso ,&nbsp;Juliana Dalboni Rocha ,&nbsp;Daniela Nogueira","doi":"10.1016/j.nexus.2024.100350","DOIUrl":"10.1016/j.nexus.2024.100350","url":null,"abstract":"<div><div>Energy security refers to the continuous and reliable access to energy sources at an affordable cost. In rural areas, particularly in Brazil's semi-arid regions, this security is essential for the survival and development of communities. This research analyzes energy security levels and their interfaces with water, food and socioecological security. The <em>nexus+ approach</em> has been used as a theoretical framework. This case study focuses on a settlement of small-scale family farmers in the semiarid region of northeastern Brazil. An extensive literature review on energy security and energy transition was carried out. Four pilot agri-villages were considered. The methodology of this study employs a multi-criteria analysis using the analytical hierarchy process (AHP). This approach supports decision-making across various criteria, both quantitative and qualitative. Additionally, QGIS software was utilized to create thematic maps by categorizing defined classes and using the raster calculator function. To determine the degree of energy security in each agri-village, five classes were defined. Among the scenarios analyzed, the main results indicate that three of the four agro-villages analyzed have very low levels of energy security. Only one of the agri-villages showed a satisfactory level of energy security. These findings are consistent with trends observed in other similar studies in the region. The study concluded that measures involving the use of renewable energies, such as solar energy, can increase energy security. This is crucial for guaranteeing sustainable irrigated agriculture and, as a result, food security, ultimately contributing to improving the family income of socially, economically, and environmentally vulnerable populations.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100350"},"PeriodicalIF":8.0,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745792","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":"Framework for evaluating the successful implementation of solar home systems in public housing projects in the United Arab Emirates","authors":"Abdalla Mahmoud Salim ,&nbsp;Saleh Abu Dabous","doi":"10.1016/j.nexus.2024.100347","DOIUrl":"10.1016/j.nexus.2024.100347","url":null,"abstract":"<div><div>Successful planning and implementation of solar home systems (SHS) remains a significant challenge for government agencies, particularly from economic and sustainability perspectives. This study aims to develop a stakeholder-based framework for evaluating SHS programs in the public housing sector of the United Arab Emirates (UAE). A mixed-method approach was employed, incorporating both qualitative and quantitative data collection. A comprehensive review of SHS was conducted to identify the main global success factors for implementing the system in public housing projects. Subsequently, a structured questionnaire was distributed to 56 specialized participants comprising institutional stakeholders involved in SHS implementation in the UAE, leading to the identification of the critical success factors (CSF). Furthermore, 24 domain experts validated the data through focused group interviews. The findings indicate that the success of SHS programs is significantly influenced by regional factors, with stakeholders playing a pivotal role in defining the success factors. The research identified 44 potential CSFs, categorized into six fundamental groups: political, economic, technical, social, environmental, and marketing. Among these, economic factors were the most significant in the UAE, followed by technical, political, environmental, marketing, and social aspects. Government support was identified as the most CSF, followed by annual savings, maintenance and monitoring, installation quality, and payback period. The proposed framework emphasizes the government's role as the primary stakeholder, guiding the evaluation of success based on specific goals and performance metrics. Each stakeholder's unique success factors are weighted to reflect their importance, and the analytic hierarchy process (AHP) method is employed to derive key performance indicators (KPI) for consistent success measurement. This study provides a robust tool for stakeholders to assess and compare the success of different SHS programs by considering region-specific factors. It is intended to help UAE policymakers and government authorities make decisions, ensuring more effective SHS implementation, with the potential to be applied in the other Gulf Cooperation Council Countries that share similar environmental, economic, and political conditions.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100347"},"PeriodicalIF":8.0,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757269","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":"Investigating the role of natural resources in BRICS nations: A Path towards sustainable development","authors":"Anshita Sachan,&nbsp;Ashis Kumar Pradhan,&nbsp;Vinita Mohindra","doi":"10.1016/j.nexus.2024.100345","DOIUrl":"10.1016/j.nexus.2024.100345","url":null,"abstract":"<div><div>Natural resource management is crucial in the current scenario from the viewpoint of achieving sustainable development. Emerging economies such as BRICS are rich in natural resources and hence, resource allocation and extraction can impact environmental sustainability. Against this backdrop, we examine the relationship between natural resources rent, renewable energy consumption, agriculture production, human capital index, and carbon emissions for BRICS nations from 1992 to 2019 under the framework of the environmental Kuznets curve and Pollution haven/halo hypothesis. The relationship between the variables is investigated using Driscoll-Kraay standard errors, Feasible Generalised Least Square, and Panel quantile regression approaches. Our results indicate a favourable relationship between natural resources rent, renewable energy consumption, human capital index, and carbon emissions. Whereas, agriculture production has an unfavourable impact on carbon emissions in BRICS nations. It is recommended to use the resources sustainably, invest in clean technologies in industrial practices, expand investment in renewable energy, and introduce sustainable farming practices and awareness programmes for the individuals' skill development.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100345"},"PeriodicalIF":8.0,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178352","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":"Microalgal biofuels: Challenges and prospective in the framework of circular bioeconomy","authors":"Sajani Piyatilleke ,&nbsp;Bavatharny Thevarajah ,&nbsp;P.H.V. Nimarshana ,&nbsp;Thilini U. Ariyadasa","doi":"10.1016/j.nexus.2024.100338","DOIUrl":"10.1016/j.nexus.2024.100338","url":null,"abstract":"<div><div>Microalgae are a promising bioresource, facilitating carbon dioxide sequestration and wastewater bioremediation whilst synthesizing lipids and carbohydrates that could be processed into biofuels such as biodiesel, biochar, biogas, and biohydrogen. Microalgae has the potential to play a major role within a sustainable bioeconomy, through zero-waste, carbon-neutral production of multiple biofuels by valorizing the entire biomass. Despite the multitude of advantages in deriving biofuels from microalgae, techno-economic challenges, such as chemical requirements for cultivation, energy requirements of harvesting, and tradeoffs between efficiency-energy-cost of downstream processing methods act as a barrier to scale-up and economically viable operation under the framework of a circular bioeconomy. Thus, this review aims to discuss the potential of microalgae-derived biofuels in achieving a circular bioeconomy through perspectives of possible integration with wastewater bioremediation as well as multiproduct biorefining operations. Furthermore, the review will detail the encompassing techno-economic and sustainability challenges toward large-scale implementation of microalgal biofuels within the framework of a circular bioeconomy, while assessing the potential solutions and perspectives.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100338"},"PeriodicalIF":8.0,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177888","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}