Energy nexus最新文献

{"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}

{"title":"Comparative analysis of environmental impact and energy consumption in sesame and mung bean production using life cycle assessment and data envelopment analysis","authors":"Homa Rostami ,&nbsp;Amir Azizpanah ,&nbsp;Rostam Fathi ,&nbsp;Morteza Taki","doi":"10.1016/j.nexus.2025.100397","DOIUrl":"10.1016/j.nexus.2025.100397","url":null,"abstract":"<div><div>The study aimed to evaluate energy consumption patterns, environmental impacts, and optimization of energy use in sesame and mung bean productions in Abdanan, Iran. Data were gathered and evaluated using surveys from 41 farmers through questionnaire and face to face interview. The results revealed that for sesame production, the energy ratio was 1.68, energy productivity was 0.067 kg MJ^-1 and specific energy was 14.48 MJ kg^-1, while for mung bean production, these values were significantly lower at 0.72, 0.049 kg MJ^-1 and 2.32 MJ kg^-1. In terms of environmental impact, sesame production exhibited fewer emissions across most of the 15 mid-point environmental indicators assessed, with mung bean production resulting in higher emissions related to ecosystem quality, human health, climate change and resource depletion; specifically, the global warming potential for producing one ton of sesame was calculated as 1459.17 kg CO_2eq compared to 2237.11 kg CO_2eq for mung bean. The primary contributor to climate change was identified as direct emissions from input usage, with reduced diesel fuel consumption in sesame farming significantly mitigating environmental impacts. Efficiency analysis using Data Envelopment Analysis (DEA) indicated that 65.85 % of mung bean production units were efficient in the Variable Returns to Scale (VRS) model and 34.15 % in the Constant Returns to Scale (CRS) model. For sesame production, these rates were 56.09 % in the VRS and 36.58 % in the CRS model. Average technical efficiency was estimated at 87.89 % for mung bean and 85.83 % for sesame. The study concludes that sesame production is more energy-efficient and environmentally friendly compared to mung bean production, suggesting that farmers should adopt practices that reduce diesel fuel consumption and optimize input usage to enhance sustainability and minimize environmental impacts. Future research could explore alternative farming practices that further improve energy efficiency and reduce greenhouse gas emissions in both crops.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100397"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454823","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":"Enhancing sustainability through optimized adsorption using a novel Klason-lignin-based biosorbent derived from sugar-palm fruit shells for efficient removal of Pb(II) and Cd(II)","authors":"Ruka Yulia ,&nbsp;Husni Husin ,&nbsp;Muhammad Zaki ,&nbsp;Nasrullah Razali ,&nbsp;Hisbullah ,&nbsp;Fahrizal Nasution ,&nbsp;Ahmadi ,&nbsp;Nurhazanah ,&nbsp;Muhammad Lathiful Yazil ,&nbsp;Yuliana Sy ,&nbsp;S. Syafiie","doi":"10.1016/j.nexus.2025.100398","DOIUrl":"10.1016/j.nexus.2025.100398","url":null,"abstract":"<div><div>This study investigates the isolation and application of a Klason-lignin-based biosorbent derived from sugar palm fruit shell (SPFS) waste for the adsorption of Pb(II) and Cd(II) from toxic wastewater. The SPFS waste, rich in lignocellulose, underwent pretreatment to extract lignin-containing functional groups suitable for metal ion adsorption. The biosorbent's morphology before and after adsorption was analyzed. Adsorption effectiveness was evaluated through isotherm and kinetic models, with optimal conditions determined using Box-Behnken Design and Response Surface Methodology. Maximum adsorption capacities of 31.35 mg/g for Pb(II) and 12.5 mg/g for Cd(II) were achieved. Optimal conditions, based on Box-Behnken design, were 116.535 mins, 60 mg/L concentration, and 0.5 g adsorbent mass, resulting in adsorption efficiencies of 94.48 % and 60.98 % for Pb(II) and Cd(II), respectively. This research demonstrates the potential of Klason lignin from sugar palm fruit shell (KLSPFS) as an effective biosorbent for Pb(II) and Cd(II) removal, contributing to sustainable development goals 3, 6, and 12 by promoting efficient recycling technologies for improved health, water quality, and waste reduction.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100398"},"PeriodicalIF":8.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454175","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":"Experimental and computational analyses of a photovoltaic module cooled with an optimized converging channel absorber","authors":"Ali Radwan ,&nbsp;Salah Haridy ,&nbsp;Aimane Kemel ,&nbsp;Ibrahim I. El-Sharkawy ,&nbsp;Essam M. Abo-Zahhad","doi":"10.1016/j.nexus.2025.100401","DOIUrl":"10.1016/j.nexus.2025.100401","url":null,"abstract":"<div><div>The electrical performance of photovoltaic (PV) modules under concentrated illumination significantly declines due to the substantial increase in the module's average temperature, especially in areas with elevated ambient temperatures and high levels of solar radiation, such as the Gulf region. Therefore, implementing efficient thermal management to these modules is required for achieving a lower operating temperature, longer lifespan, higher electrical energy output, and harnessing low-grade thermal energy. Converging absorbers are commonly used in PV module's cooling. However, the optimized design for these absorbers is rarely explored. This study proposes an integrated framework combining outdoor experimental testing, computational modeling, and desirability optimization through response surface methodology (RSM) to fill this gap. This integrated framework is employed to statistically evaluate the impact of the converging channel outlet height (H_out, ranging from 3 mm to 17 mm), cooling fluid velocity (from 0.007 to 0.01 m/s), adhesive material thermal conductivity (from 0.14 to 3.7 W/m·K), and cooling water inlet temperature (25 to 35 °C) at a solar concentration ratio of 3 Suns on various PV module responses. Five responses including module temperature, module temperature non-uniformity, thermal power, net electrical power, and entropy generation rate are evaluated at these ranges of the design factors. Predictive models for these five responses are developed with high coefficients of determination (R²). An analysis of variance is performed to identify the most significant factors and interactions influencing each response. Various optimization scenarios for the responses are explored. Among these, maximizing the thermal and electrical generated power can be attained by using a converging channel with H_out of 3 mm, inlet velocity of 0.0084 m/s, inlet temperature of 20 °C, and adhesive thermal conductivity of 2.94 W/m·K.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"17 ","pages":"Article 100401"},"PeriodicalIF":8.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474767","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}