Energy nexusPub Date : 2026-06-01Epub Date: 2026-05-21DOI: 10.1016/j.nexus.2026.100732
Xiaoxia Li , Yifan Gao , Guobin Yuan , Xiao Guo , Jinping Li
{"title":"Research on the thermodynamic performance of cascade phase change thermal storage system under unsteady conditions","authors":"Xiaoxia Li , Yifan Gao , Guobin Yuan , Xiao Guo , Jinping Li","doi":"10.1016/j.nexus.2026.100732","DOIUrl":"10.1016/j.nexus.2026.100732","url":null,"abstract":"<div><div>Cascaded phase change thermal storage (CPCTS) technology has broad application prospects in thermal energy regulation and management as a flexible and efficient means of thermal energy storage. However, most practical thermal storage engineering applications are under complex, unsteady conditions. Therefore, the effect of different arrangements of thermal storage units of low and medium-temperature phase change materials on the thermodynamic performance of the thermal storage system under unsteady conditions is addressed in this paper. This study focuses on the CPCTS device applied in the solar drying system and analyzes the thermodynamic performance of the cascade configuration under unsteady typical days. The results show that the two-dimensional model of the CPCTS is highly accurate when applied to the study of storage and exothermic processes. Under stable conditions, the effects of inlet temperature, flow rate, and melting point on the energy, exergy, and entransy performance of single-stage phase change thermal storage systems were analyzed. It is found that the matching of the phase change material's melting point and the inlet temperature is the core factor determining the heat storage performance. Furthermore, the thermodynamic characteristics of four cascaded configurations are compared under unsteady typical day conditions. Research shows that the CPCTS system has significant performance advantages under complex weather conditions. CPCTS provides up to 39.50% higher thermal storage capacity than a single-stage system, more stable energy quality (exergy efficiency) than a single-stage system under unsteady typical daily operating conditions, and up to 33.82% higher heat transfer capacity (entransy efficiency). The results verify the potential of CPCTS systems in improving heat source adaptability and comprehensive thermodynamic performance. The research results provide a theoretical basis for multi-scale modeling and engineering optimization of CPCTS systems.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"22 ","pages":"Article 100732"},"PeriodicalIF":9.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148184294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Energy nexusPub Date : 2026-06-01Epub Date: 2026-05-27DOI: 10.1016/j.nexus.2026.100730
Anwar Hegazy , Ajit Govind , Mohammed Farid
{"title":"Robust greenhouse evapotranspiration modeling for sustainable multi-sectoral assessment","authors":"Anwar Hegazy , Ajit Govind , Mohammed Farid","doi":"10.1016/j.nexus.2026.100730","DOIUrl":"10.1016/j.nexus.2026.100730","url":null,"abstract":"<div><div>Traditional greenhouse crop evapotranspiration (ET) models rely heavily on post-installation operational data, limiting their utility for pre-construction planning and design. This study developed a greenhouse-coupled ET model that integrates crop biophysical characteristics directly into a thermal model to overcome this barrier. By utilizing only local environmental data, the model quantifies cooling, heating, dehumidification, and irrigation requirements for selected crops prior to construction. Validation against experimental data demonstrated high reliability, with a normalized Root-Mean-Square Error (nRMSE) below 9% and <span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> exceeding 0.93. Simulations in the arid conditions of Minya, Egypt, revealed that crops significantly impact the microclimate, reducing peak internal temperatures by 11 °C in summer and 7 °C in winter compared to an unplanted greenhouse. Additionally, the model quantified crop-induced humidity increases, allowing for the development of targeted climate control strategies. This integrated modeling approach optimizes resource management and energy efficiency, offering a robust tool for sustainable greenhouse design and multisectoral applications in precision agriculture.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"22 ","pages":"Article 100730"},"PeriodicalIF":9.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148184296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Energy nexusPub Date : 2026-06-01Epub Date: 2026-03-11DOI: 10.1016/j.nexus.2026.100687
Cyprien Drommi, Petros Chatzimpiros
{"title":"Corrigendum to “Modeling power and workforce demand in French field agriculture highlights variability, fleet redundancy, and magnitude comparable to renewable electricity generation” [Energy Nexus 21 (2026) 100654]","authors":"Cyprien Drommi, Petros Chatzimpiros","doi":"10.1016/j.nexus.2026.100687","DOIUrl":"10.1016/j.nexus.2026.100687","url":null,"abstract":"","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"22 ","pages":"Article 100687"},"PeriodicalIF":9.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148241824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Energy nexusPub Date : 2026-06-01Epub Date: 2026-05-19DOI: 10.1016/j.nexus.2026.100733
Nur Firdaus , Akihisa Mori
{"title":"Measuring the climate–energy–land nexus: Integrating energy and land use transition costs in Indonesia’s net-zero pathway","authors":"Nur Firdaus , Akihisa Mori","doi":"10.1016/j.nexus.2026.100733","DOIUrl":"10.1016/j.nexus.2026.100733","url":null,"abstract":"<div><div>The climate–energy–land nexus, highlighted in the 2018 United Nations Intergovernmental Panel on Climate Change Special Report, is crucial for advancing global net-zero emissions. While previous research has explored the mechanisms and significance of this nexus, a lack of quantitative assessment has undermined its compelling impact. This study proposes a novel methodology for measuring the nexus using a Global Change Analysis Model. We used Indonesia to estimate the nexus in countries with abundant coal assets and extensive forest cover, defining it as the additional transition cost or the sum of energy- and land-related transition costs, with and without land-based mitigation measures. Our findings demonstrate that the nexus amounts to USD 558–922 billion (2.8% - 4.6% of GDP) without strict forest protection policies, depending on the availability and potential of mitigation technologies. The nexus becomes larger without land carbon pricing (USD 659–1019 billion or 3.3%-5.1% of GDP). The results indicate that land carbon pricing reduces the total transition cost more economically than strict forest protection policies. However, effective and appropriate implementations of land-based climate mitigation measures remain a challenge. The proposed methodology is globally applicable by incorporating country-specific conditions.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"22 ","pages":"Article 100733"},"PeriodicalIF":9.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148184211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Agricultural intensification with Agrivoltaic insect net house systems: Delving into techno-economic feasibility in soilless media","authors":"Gaurav Gadhiya , Urvashi Patel , Suprava Chakraborty , Pushpendrasingh Chauhan","doi":"10.1016/j.nexus.2026.100735","DOIUrl":"10.1016/j.nexus.2026.100735","url":null,"abstract":"<div><div>Energy and food are now the two most critical resources for any country. Population growth, industrialization, carbon emissions and food scarcity are all posing major problems to the environment and people. To overcome these difficulties an AV (Agrivoltaic) system which has been an integrated sustainable system is necessary. The AV system is compatible with the UN's SDGs 7, 8 and 13. However, AV might not be suitable for vegetable crops that require accurate pest management since it lacks microclimate control. In proposed work, researchers have developed a new technique for growing capsicum that combines an insect net house and AV. The 1.8 kW AV system has been placed at a height of 3 m to provide optimal tractor movement for various agricultural practices. The total cost of building the AVINH (Agrivoltaic insect net house) structure has been 85,300 ₹ (1 ₹=0.012 USD). For experimental purpose, three distinct land treatments have employed utilizing soil and soilless media to cultivate capsicum (shade tolerant crop) in Gujarat. These treatments involved AVINH with covered roof and open roof with open fields serving as three distinct environmental conditions. Remarkably the land equivalent ratio in an AVINH can reach up to 2.55 indicating a significant increase in resource efficiency. It has produced 1058.30 kWh of emission-free energy during the experimental season with 8 years of payback period. This approach may be utilized widely, involving scholars and business professionals to enhance national progress and standard of living.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"22 ","pages":"Article 100735"},"PeriodicalIF":9.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148184295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Energy nexusPub Date : 2026-03-01Epub Date: 2026-01-10DOI: 10.1016/j.nexus.2026.100642
Hassan Hajabdollahi, Mohsen Abooli Pour, Mohammad Shafiey Dehaj
{"title":"Cogeneration system utilizing geothermal energy: Energy, exergy, economic and environmental analyses and multi-objective optimization","authors":"Hassan Hajabdollahi, Mohsen Abooli Pour, Mohammad Shafiey Dehaj","doi":"10.1016/j.nexus.2026.100642","DOIUrl":"10.1016/j.nexus.2026.100642","url":null,"abstract":"<div><div>A comprehensive energy, exergy, economic, and exergoeconomic analyses was performed on a geothermal-based cogeneration system designed for the simultaneous production of hydrogen, oxygen, and freshwater. The system comprises three principal subsystems: a dual-pressure organic Rankine cycle for power generation, a reverse osmosis desalination unit for freshwater production, and a proton exchange membrane electrolyzer for hydrogen and oxygen generation. The system optimization was carried out using a non-dominated sorting genetic algorithm with the objective of minimizing the total exergy destruction cost rate while maximizing freshwater output. The results indicate that the organic Rankine cycle is responsible for the largest share of exergy destruction, accounting for approximately 61 % of the total, whereas the proton exchange membrane electrolyzer contributes about 65 % of the total exergy destruction cost rate. From an exergoeconomic perspective, the high-pressure turbine demonstrated the highest exergoeconomic factor, implying that its exergy destruction is relatively low compared to its associated investment cost. The overall exergy efficiency of the system and the corresponding payback period were estimated to be 23.81 % and 7.04 years, respectively, confirming the technical feasibility and economic viability of the proposed configuration.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"21 ","pages":"Article 100642"},"PeriodicalIF":9.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Energy nexusPub Date : 2026-03-01Epub Date: 2026-01-08DOI: 10.1016/j.nexus.2026.100634
Claudinei de Moura Altea, Jurandir Itizo Yanagihara
{"title":"Optimizing pumped hydro and hydrogen storage for water-dependent renewable systems","authors":"Claudinei de Moura Altea, Jurandir Itizo Yanagihara","doi":"10.1016/j.nexus.2026.100634","DOIUrl":"10.1016/j.nexus.2026.100634","url":null,"abstract":"<div><div>Brazil’s electricity sector is undergoing a profound transformation as the share of intermittent renewables, such as wind and solar, continues to grow. While the country benefits from abundant renewable resources and a historically hydro-dominated grid, this configuration is increasingly challenged by seasonal water variability, rising curtailments, and the need to phase out fossil-based backup generation. Addressing these challenges requires the deployment of long-duration energy storage technologies that can provide reliability, flexibility, and resilience at the system level.</div><div>For the first time in the Brazilian context, this study proposes a long-term optimization framework to assess the role of Pumped Hydro Storage (PHS) and Hydrogen (H₂) in enabling a cost-effective and sustainable expansion of Brazil’s power system. The framework simultaneously co-optimizes PHS siting—based on a geospatial inventory of 337 potential sites—together with modular H₂ deployment, renewable expansion, and hydrogen exports within a unified objective function. The model spans a 25-year planning horizon (2026–2050) with monthly resolution, explicitly integrating hydrological cycles and water-dependent dispatch, which is crucial for a hydro-dominated system like Brazil’s. It captures renewable expansion, storage deployment, hydrogen exports, and fossil imports. Decision variables include renewable capacity additions, the siting and adoption of PHS plants, and modular deployment of H₂ electrolysis and re-electrification units. The formulation incorporates round-trip efficiencies, investment and operating costs, CO₂ emissions with a carbon price, and penalties for curtailment, thereby ensuring an integrated assessment of technical, economic, and environmental trade-offs.</div><div>The results highlight distinct but complementary contributions of PHS and H₂. PHS consistently delivers higher round-trip efficiency and cost-effectiveness, confirming its role as a mature and reliable backbone for renewable integration. Hydrogen, in turn, provides strategic systemic flexibility, particularly under high-renewable penetration, enabling surplus absorption and export opportunities. In the optimal configuration (Scenario 7), the model deploys 101 PHS plants and 75 H₂ modules, and the system transitions from a negative net balance in the baseline to a positive economic outcome. While the baseline operates in a net cost position, the optimized configuration not only fully offsets this deficit but also generates additional revenues equivalent to 28 % of the original system costs, underscoring the economic superiority of the PHS–H₂ hybrid solution. Complementarily, the Fossil-Free scenario, which enforces the complete elimination of fossil-based imports in the final five years of the horizon, demonstrates the system’s ability to sustain a fully renewable and storage-backed operation, while maintaining overall system costs reduction within 4 % of the optimal config","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"21 ","pages":"Article 100634"},"PeriodicalIF":9.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Energy nexusPub Date : 2026-03-01Epub Date: 2025-12-09DOI: 10.1016/j.nexus.2025.100626
Giuseppe Mancuso, Dilia Carolina Duran Lugo, Emanuele Spizzirri, Attilio Toscano, Francesca Valenti
{"title":"Optimizing plant biomass from constructed wetlands for biogas production within the water-energy-food nexus","authors":"Giuseppe Mancuso, Dilia Carolina Duran Lugo, Emanuele Spizzirri, Attilio Toscano, Francesca Valenti","doi":"10.1016/j.nexus.2025.100626","DOIUrl":"10.1016/j.nexus.2025.100626","url":null,"abstract":"<div><div>As the global demand for sustainable energy solutions grows, Constructed Wetlands (CWs) are gaining recognition not only for their effectiveness in wastewater treatment but also for their untapped potential as bioenergy sources. This study explores the viability of CW-derived plant biomass for biogas production, evaluating how plant species, maturity stages, and storage durations can influence methane yield. Using biomass from a free water surface wetland in Italy, four plant species, e.g., <em>Phragmites australis, Typha latifolia, Carex</em> spp., and <em>Iris pseudacorus</em>, were analyzed through Biomethane Potential (BMP) tests at three storage intervals: i) immediate – t(0), ii) three months after harvesting – t(1), and iii) six months – t(2) after harvesting, respectively. Results indicate that biogas yield peaked at t(1) for all species, with <em>Iris pseudacorus</em> showing consistent performance over time, and low carbon-to-nitrogen (C/N) ratios correlating with higher methane output. While plant maturity and storage significantly affected volatile solids and gas production, not all decreases in solids translated to higher methane yields. These findings indicate that CW biomass holds potential as a renewable feedstock for biogas production, though further optimization and scale-up studies are needed to confirm its practical applicability. By aligning with the Water-Energy-Food Nexus and Nature-based Solutions (NbS), the research promotes integrated approaches to enhance resource recovery, reduce waste, and support climate resilience.</div></div>","PeriodicalId":93548,"journal":{"name":"Energy nexus","volume":"21 ","pages":"Article 100626"},"PeriodicalIF":9.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145747036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}