Energy nexus最新文献

{"title":"Impact of investment subsidy allocation schemes on levelized costs of renewable electricity-water systems in rural West Africa","authors":"Wilhelm Kuckshinrichs ,&nbsp;Holger Schlör ,&nbsp;Boubacar Ibrahim ,&nbsp;Florian Siekmann ,&nbsp;Sandra Venghaus","doi":"10.1016/j.nexus.2025.100411","DOIUrl":"10.1016/j.nexus.2025.100411","url":null,"abstract":"<div><div>Access to electricity and drinking water are among the main obstacles in rural West Africa. They could be mitigated by implementing PV systems with battery storage and electrical water pumping systems. To assess the impacts of electricity supply in Dar Es-Salam village, a rural West African community, the economics of a PV system with battery storage and electrical water pumping are scrutinized. These systems will facilitate electricity and water access and provide the village with uninterrupted supply. Within the rural context, electricity can be used for direct residential consumption and to operate an electric water pumping system to supply clean drinking water to the households, making it an integrated, linearly linked PV/battery and water pumping system. As access to financial resources illustrates another constraint, especially in the context of West Africa and the Sahel region, the paper further assesses impacts of an investment costs subsidy on the economics of electricity and water. By examining different allocation schemes of a constrained investment costs subsidy, the paper estimates their impact on the Levelized Costs of Electricity and Water, compares these results with the current state costs reported by local villagers, and identifies a superior subsidy allocation scheme. In our case, allocating the investment costs subsidy to the PV/battery system is identified as the superior allocation scheme. This is due to the high upfront PV/battery costs in relation to the water system but also reflects the villagers’ preferences as to electricity and water costs. Based on the case data for Dar Es-Salam village, the Levelized Cost of Electricity and of Water, respectively, resulted to 0.210€/kWh and 0.520 €/m³, without subsidy. A subsidy of approximately 2/3 of the total investment costs and allocating the subsidy to the PV/battery system offers to drastically reduce the Levelized Costs for Electricity and Water to 0.045€/kWh and 0.306 €/m³, respectively.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"18 ","pages":"Article 100411"},"PeriodicalIF":8.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697315","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 multicriteria decision analysis for the selection and ranking of crop residue for sustainable energy generation in West Africa","authors":"Noel Ngando Same ,&nbsp;Abdulfatai Olatunji Yakub ,&nbsp;Deepak Chaulagain ,&nbsp;Jaebum Park ,&nbsp;Abdulhameed Babatunde Owolabi ,&nbsp;Jeong Ok Lim ,&nbsp;Jong Wook Roh ,&nbsp;Dongjun Suh ,&nbsp;Jeung-Soo Huh","doi":"10.1016/j.nexus.2025.100408","DOIUrl":"10.1016/j.nexus.2025.100408","url":null,"abstract":"<div><div>West Africa faces significant energy access challenges, particularly in rural areas, where limited energy supply exacerbates poverty and insecurity. Renewable energy from agricultural residues has emerged as a promising solution to address energy shortages and climate change. However, while 18 African countries, including Mauritius, utilize agricultural residues such as sugarcane bagasse for electricity generation, West African nations remain underdeveloped in this area. This study explores the potential of using alternative crop residues to alleviate energy stress and poverty in the region. Given the complexities of factors such as availability, moisture content, and energy content in crop selection, multicriteria decision analysis (MCDA) was employed to identify the most suitable crop residues for bioenergy production in West Africa. Expert consultations were conducted to define assessment criteria and evaluate various residues, including straws, peels, husks and shells, fibers, and stalks. The findings indicate that straw residues, particularly from cereals, are the most suitable for energy production, followed by husks and shells, stalks, fibers, and peels. The study estimates that West Africa could annually harvest approximately 402 million metric tons (Mt) of biomass, with an energy content of 6,960 Petajoules (PJ). Key crops such as cassava, maize, rice, and sorghum contribute significantly to this biomass potential, with cassava accounting for 35% of the total energy. Nigeria and Ghana emerge as the leading countries in terms of energy potential. The techno-economic assessment for 2021 estimates that 614 PJ, equivalent to 170 Terawatt hours (TWh), could be realized. With total energy consumption in West Africa reaching 3.05 EJ (3050 PJ) in 2022, agricultural residues alone could meet approximately 20.13% of the region's total energy demand. This research underscores the importance of strategic crop residue selection and biomass utilization as a key driver for sustainable energy production, offering a viable solution to energy poverty and fostering the adoption of renewable energy in West Africa.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"18 ","pages":"Article 100408"},"PeriodicalIF":8.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684186","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":"Harnessing the future: Exploring digital twin applications and implications in renewable energy","authors":"Concetta Semeraro ,&nbsp;Haya Aljaghoub ,&nbsp;Hamad Khalid Mohamed Hussain Al-Ali ,&nbsp;Mohammad Ali Abdelkareem ,&nbsp;Abdul Ghani Olabi","doi":"10.1016/j.nexus.2025.100415","DOIUrl":"10.1016/j.nexus.2025.100415","url":null,"abstract":"<div><div>The extensive use of conventional oil and gas energy resources has significantly impacted the planet, accelerating global warming and climate change. A key solution to this issue is the shift from fossil fuels to renewable energy (RE) sources. However, integrating renewable energy for transportation, power generation, and energy storage presents challenges due to its intermittent nature and reliance on external factors. A digital twin (DT) is an effective way to tackle these challenges. This technology utilizes adaptive models to simulate the real-time performance of physical systems in a digital environment, helping to predict and prevent potential system failures. This paper comprehensively reviews the latest research on the context, applications, lifecycle, functions, and architecture of digital twin technology in renewable energy systems.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"18 ","pages":"Article 100415"},"PeriodicalIF":8.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684142","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":"China's coal mine closures from 2011 to 2019: Unintended water benefits","authors":"Yunan Peng ,&nbsp;Jinling Guo ,&nbsp;Junlian Gao ,&nbsp;Bo Zhang ,&nbsp;Kejia Yan","doi":"10.1016/j.nexus.2025.100412","DOIUrl":"10.1016/j.nexus.2025.100412","url":null,"abstract":"<div><div>In the global push towards carbon neutrality, the gradual reduction of coal has become a prominent topic of discussion. While the potential negative impacts of coal mine closures have drawn considerable attention, the benefits for water resources remain underexplored. This study seeks to analyze the effects of China’s coal mining de-capacity policies on water resources between 2011 and 2019, employing a bottom-up accounting approach. During this period, 1,610.4 Mt of coal mining capacity was closed, with 55.1 % of the total closures concentrated in water-scarce regions. The shutdown of coal mines unexpectedly generated substantial water co-benefits, including reductions in mine water, water consumption and wastewater discharge, accounting for 8,697.7 Mt, 2,701.5 Mt and 2,627.9 Mt, respectively. These water benefits were primarily observed in the Middle Yellow River and Southwest regions of China, with provinces such as Shanxi, Guizhou, Sichuan, Henan and Inner Mongolia collectively contributing 58.6 % of the national total. The findings highlight the positive impacts of coal de-capacity policies on regional groundwater protection and ecosystems, offering valuable insights for promoting coal withdrawal as part of a sustainable energy transition.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"18 ","pages":"Article 100412"},"PeriodicalIF":8.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684145","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":"Integrated energy planning: Review of global practices for energy security and Paris Agreement implementation in Pakistan","authors":"Muhammad Saad Moeen ,&nbsp;Joni Jupesta ,&nbsp;Tatsuya Hanaoka","doi":"10.1016/j.nexus.2025.100413","DOIUrl":"10.1016/j.nexus.2025.100413","url":null,"abstract":"<div><div>This research aims to examine existing literature on integrated energy planning (IEP) by reviewing global practices for energy security and the Paris Agreement. In addition, this research aims to find research gaps and discuss key challenges in Pakistan's energy planning. The Paris Agreement focuses on reducing anthropogenic greenhouse gas (GHG) emissions, toward net-zero GHG emissions (NZE). Effective climate strategies are crucial for achieving Nationally Determined Contributions (NDCs) by 2030 and NZE targets.</div><div>Using the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA), this study firstly conducted a systematic literature review on IEP, GHG emissions and the Paris Agreement. Global literature reveals that IEP is effective for achieving both energy security and decarbonization. Some countries have already implemented IEP while submitting their NDCs. However, Pakistan lacks in implementation of IEP, and current literature is also limited in its linkages to the Paris Agreement. Most studies in Pakistan focused on the power sector, instead of overall energy planning, which overlooks discussions on electrification, clean energy transition, and decarbonization in the country.</div><div>This research is the foundation for a proposed study to build long-term policy scenarios for achieving NDCs and NZE targets in Pakistan. The methodology of the proposed research would be based on a bottom-up approach for discussing IEP framework, in order to discuss crucial issues for clean energy transition, electrification, and climate action plans in Pakistan. The proposed research should align with several SDGs targets, specifically, it addresses SDG 7 (affordable and clean energy) and SDG 13 (climate action).</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"18 ","pages":"Article 100413"},"PeriodicalIF":8.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684148","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":"Path to sustainability: Analyzing usage intention of energy-efficient appliances","authors":"Anandhi Elangovan,&nbsp;Manivannan Babu","doi":"10.1016/j.nexus.2025.100406","DOIUrl":"10.1016/j.nexus.2025.100406","url":null,"abstract":"<div><div>In the face of global climate challenges, individual actions are crucial for achieving sustainability goals, since collective efforts to adopt energy-saving practices can lead to significant reductions in energy consumption and greenhouse gas emissions. This study investigates the factors influencing the intention to use energy-efficient appliances, emphasizing the Theory of Planned Behavior (TPB) and the Norm Activation Model (NAM) that shape these intentions. Data were analyzed using Partial Least Squares - Structural Equation Modeling, with a sample of 371 respondents selected through convenience sampling. The study highlights the importance of awareness of consequences, ascription of responsibility, personal norms, attitudes, subjective norms, perceived behavioral control, eco-label knowledge, and cost, suggesting that informed consumers are more likely to use energy-efficient products. These behavioral intentions are essential for achieving energy-saving behaviors, ultimately leading to broader environmental benefits. The findings hold significant implications for policymakers and practitioners aiming to promote sustainability and reduce national energy consumption and greenhouse gas emissions.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"18 ","pages":"Article 100406"},"PeriodicalIF":8.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684143","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":"Operating regimes for intra-carbonisation of sawdust with low external fuel requirements","authors":"Gratitude Charis ,&nbsp;Bilal Patel","doi":"10.1016/j.nexus.2025.100410","DOIUrl":"10.1016/j.nexus.2025.100410","url":null,"abstract":"<div><div>Investigations of an understudied concept of intra-carbonisation of loose sawdust waste were carried out with a view to promote their valorisation by low-income communities for better socio-economic inclusivity. Very few studies have investigated the intra-carbonisation of such loose waste biomass with respect to reactor configuration, biomass size, external fuel use and residence time and their effects on the yield and quality of carbonised biomass produced. As a starting point, the open mound reactor configuration was explored as a low-cost option that has the least intensive technical design, operations and maintenance requirements. To allow multiple heat transfer modes, including convection, the study found that the best conditions for carbonisation using this reactor configuration were: biomass samples with a low amount of fines; smaller heap sizes for samples with fines; lower external fuel (3–4 kg of charcoal) for slower heating rates; and moderate residence times of 15 to 26 h for a mass of 46 to 56 kg of sawdust. The carbonised sawdust properties, especially GCV, were comparable to similar research. The best briquettes were obtained from the large particle size material carbonised with 3–4 kg of fuel with an air supply to the fuel chamber, while the configuration without an air supply and the longest residence time produced the worst briquettes in terms of fuel value. The yields of carbonised biomass were between 35 % and 58 %, where the latter reflected low conversion levels since unconverted biomass has a higher density than charred sawdust due to high moisture and volatile contents.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"18 ","pages":"Article 100410"},"PeriodicalIF":8.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759687","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":"Socio-political determinants of public acceptance of green hydrogen","authors":"Eunjung Cho ,&nbsp;Juyong Lee","doi":"10.1016/j.nexus.2025.100403","DOIUrl":"10.1016/j.nexus.2025.100403","url":null,"abstract":"<div><div>Green hydrogen, produced through renewable energy sources, is emerging as a pivotal element in global energy transitions. Despite its potential, public acceptance remains a critical barrier to its large-scale implementation. This study aims to identify the socio-political and demographic determinants of public acceptance of green hydrogen. Using advanced variable selection methods, including ridge, lasso, and elastic net regression, we analyzed perceptions of climate change, trust in government policies, and demographic characteristics. The findings reveal that individuals prioritizing climate change over economic growth, perceiving its impacts as severe, and recognizing it as South Korea's most pressing issue are more likely to accept green hydrogen. Trust in the government's climate change response also emerged as a key factor. Demographic characteristics, such as younger age, higher income, advanced education, smaller family size, and conservative political ideology, were significantly associated with greater acceptance. These results highlight the importance of raising public awareness about the urgency of climate change and enhancing trust in government policies to promote societal acceptance of green hydrogen. Policymakers should consider these factors when developing strategies to advance the adoption of green hydrogen technologies and foster sustainable energy transitions.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"18 ","pages":"Article 100403"},"PeriodicalIF":8.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684313","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":"Development of macro and micro-nutrient rich integrated Jeevamrutha bio-fertilizer systems using rural and commercial precursors","authors":"Udaratta Bhattacharjee ,&nbsp;Ramagopal V.S. Uppaluri","doi":"10.1016/j.nexus.2025.100402","DOIUrl":"10.1016/j.nexus.2025.100402","url":null,"abstract":"<div><div>Cow dung-based bio-fertilizers often requires additional organic amendments to demonstrate the nutritional necessities for field applications. Thereby, the present study validated the need for an integrated farming technique with the readily available rural and commercial precursors (such as vermicompost, neem cake, tea waste and water hyacinth) into the cow-excreta-based Jeevamrutha organic bio-fertilizer. Hence, physio-chemical, nutritional content and microbial characteristics were targeted. The ratios of Jeevamrutha and the above-mentioned precursors were varied as 1:4 for vermicompost, 1:3 for neem cake, 1:2 for tea waste and 1:3–1:4 for water hyacinth at an ambient temperature between 12 and 38ºC during winter and summer seasons respectively. The wide range of temperature was considered to accomodate the average temperatures of summer and winter seasons of Guwahati, India. Nutritional factors such as total Kjeldahl nitrogen (TKN), ammonium nitrogen (AN) and phosphate (P) was maximum for tea waste-integrated Jeevamrutha bio-fertilizer. These respectively varied as 1.94–3.22 %, 726.8–1076.4 mg/L and 0.57–0.65 % during the winter and summer seasons. Similar nutrient trend was followed by neem cake-integrated Jeevamrutha bio-fertilizer (TKN:1.78–2.24 %; AN:623.4–873.56 mg/L and P:0.64–0.71 %) during winter and summer seasons. Phytotoxicity assay shows that desired concentration of the optimal compositional set was 50 % (v/v) and 20 % (v/v) for the seasons. Cost analysis for the bio-fertilizer systems revealed a minimal expenditure associated for tea waste (Rs. 10.56/kg) followed by water hyacinth-integrated Jeevamrutha bio-fertilizer (Rs. 12.68/kg) in comparison with the conventionally used jaggery-based Jeevamrutha bio-fertilizer (Rs. 17.3/kg). Here, jaggery refers to the product obtained as a product in rural India<em>.</em></div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100402"},"PeriodicalIF":8.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519051","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":"Maintenance techniques to increase solar energy production: A review","authors":"Fernando Martinez-Gil ,&nbsp;Christopher Sansom ,&nbsp;Aránzazu Fernández-García ,&nbsp;Alfredo Alcayde-García ,&nbsp;Francisco Manzano-Agugliaro","doi":"10.1016/j.nexus.2025.100384","DOIUrl":"10.1016/j.nexus.2025.100384","url":null,"abstract":"<div><div>This review explores advanced maintenance techniques aimed at improving solar energy production efficiency. The study analyzes the rapid growth of solar energy and the challenges posed by environmental factors such as soiling, harsh climate conditions and hotspots, which reduce photovoltaic (PV) and concentrated solar power (CSP) system performance. Predictive models for solar energy generation and soiling detection, including artificial intelligence (AI) and machine learning (ML) algorithms and Internet of Things (IoT), are discussed as means for optimizing energy production and reducing maintenance costs. It is also emphasized the role of Unmanned Aerial Vehicles (UAVs) to capture images for fault detection and failure prediction, enhancing maintenance accuracy and minimizing downtime. The study concludes by analyzing the role of these techniques to reduce water consumption in cleaning tasks, as well as solutions to increase the operational lifespan and performance of solar plants such as anti-soiling coatings, robotic cleaning systems and accurate predictive models.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100384"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454174","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}