Renewable Energy Focus最新文献_第5页

An agent-based modeling approach for simulating solar PV adoption: A case study of Irish dairy farms 模拟太阳能光伏应用的代理建模方法：爱尔兰奶牛场案例研究

IF 4.2

Renewable Energy Focus Pub Date : 2024-10-01 DOI: 10.1016/j.ref.2024.100653

Iias Faiud, Michael Schukat, Karl Mason

引用次数: 0

Optimization of thermal energy storage in phase change Material/Nano additive heat exchangers utilizing elliptical and circular tubes with and without fins 利用带鳍片和不带鳍片的椭圆管和圆管优化相变材料/纳米添加剂热交换器的热能储存

IF 4.2

Renewable Energy Focus Pub Date : 2024-10-01 DOI: 10.1016/j.ref.2024.100654

Subhan Ali Shaik , Praveen Kumar Nigam , S.K. Gugulothu

{"title":"Optimization of thermal energy storage in phase change Material/Nano additive heat exchangers utilizing elliptical and circular tubes with and without fins","authors":"Subhan Ali Shaik , Praveen Kumar Nigam , S.K. Gugulothu","doi":"10.1016/j.ref.2024.100654","DOIUrl":"10.1016/j.ref.2024.100654","url":null,"abstract":"<div><div>This study numerically investigates the enhancement of thermal energy storage systems using phase change materials (PCMs) combined with nano additives and finned tubes. The analysis compares elliptical and circular tubes with configurations of two or four fins to improve heat transfer efficiency. Finned elliptical tubes demonstrate a reduction in PCM melting time by up to 19 % at 50 °C, achieving faster melting compared to unfinned designs. Circular tubes with fins also exhibit a 12.6 % reduction in melting time, showing slightly higher thermal performance than elliptical tubes in certain conditions. The study considers different nano additives—graphene nanoplatelets (GnP), copper (Cu), copper oxide (CuO), and aluminum oxide (Al<sub>2</sub>O<sub>3</sub>)—to evaluate their impact on PCM heat transfer rates. Among these, GnP achieves the most effective thermal enhancement. The findings indicate that fin configuration, tube geometry, and nano additives significantly affect PCM melting and heat transfer dynamics. This research optimizes the design of PCM-based heat exchangers, contributing to more efficient and sustainable thermal energy storage solutions for various applications.</div></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100654"},"PeriodicalIF":4.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658426","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}

引用次数: 0

Challenges and mitigation techniques in adaptive protection for microgrids: comprehensive review 微电网适应性保护方面的挑战和缓解技术：全面审查

IF 4.2

Renewable Energy Focus Pub Date : 2024-10-01 DOI: 10.1016/j.ref.2024.100652

A.S. Welankiwar , R.B. Sharma , B. Kumar

{"title":"Challenges and mitigation techniques in adaptive protection for microgrids: comprehensive review","authors":"A.S. Welankiwar , R.B. Sharma , B. Kumar","doi":"10.1016/j.ref.2024.100652","DOIUrl":"10.1016/j.ref.2024.100652","url":null,"abstract":"<div><div>Microgrids (MGs) are growing in popularity as a result of its benefits to the environment and economy, as well as minimal power losses and smaller infrastructure. In recent years, conventional power grids are being transformed into smart grids, with the establishment of MGs, which connects various units of distributed generation (DG), local energy storage devices and loads to distribution systems. The practical deployment of MG faces various technological obstacles. One of the most important difficulties in MG architecture is designing a reliable protection mechanism. The magnitude of fault current, active DG, two-way power flow, higher impedance value and communication network quality are the key problems in designing an effective protection approach for AC MGs. Due to its ability to overcome these issues and its capability for real time alternation of its protection settings in response to conditions and state of operation of power system, adaptive protection schemes under are gaining more attention from the researchers in AC MGs Protection. The past research works of adaptive protection are addressed and structured systematically in this review to enable researchers run literature studies and identify relevant research works more effectively.</div></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100652"},"PeriodicalIF":4.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658424","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}

引用次数: 0

Prosumer networks – A key enabler of control over renewable energy resources 用户网络--控制可再生能源的关键因素

IF 4.2

Renewable Energy Focus Pub Date : 2024-10-01 DOI: 10.1016/j.ref.2024.100648

Adrian Florea , Lasse Berntzen , Maria Vintan , Dorel Stanescu , Daniel Morariu , Claudiu Solea , Ugo Fiore

{"title":"Prosumer networks – A key enabler of control over renewable energy resources","authors":"Adrian Florea , Lasse Berntzen , Maria Vintan , Dorel Stanescu , Daniel Morariu , Claudiu Solea , Ugo Fiore","doi":"10.1016/j.ref.2024.100648","DOIUrl":"10.1016/j.ref.2024.100648","url":null,"abstract":"<div><div>The global challenges of recent years have exacerbated the energy crisis and highlighted the need for reactive and resilient energy systems. This paper emphasises the role of collaborative networks of prosumers in exploiting renewable energy sources to achieve sovereignty over critical resources. A bibliometric study reveals significant discrepancies between countries in statutory energy policies for renewable energy integration and incentives to prosumerism. A dataset of 27 Romanian individual prosumers illustrates the differences in load profiles between residential and industrial prosumers in a temperate continental climate, highlighting the benefits and limits of increasing the share of renewable energy in the national energy system. The study shows the advantage of aggregators balancing production and consumption, provided enough storage capability is available. It also illustrates the evolution of Romanian prosumers, discussing key regulatory and technological factors, advantages, and barriers to collaboration. This research offers municipalities, public authorities, and infrastructure operators a path towards energy independence, in alignment with international efforts toward the adoption of renewable energy. The study provides valuable insights into the benefits and challenges of renewable energy integration, offering practical solutions for achieving energy independence. It also offers relevant information in the effort of legislative harmonization to enable efficient and secure integration of new actors in the electricity system, encouraging responsible prosumers and aggregators and discouraging opportunistic aggregation.</div></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100648"},"PeriodicalIF":4.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528863","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}

引用次数: 0

A precise and efficient K-means-ELM model to improve ultra-short-term solar irradiance forecasting 改进超短期太阳辐照度预报的精确高效 K-means-ELM 模型

IF 4.2

Renewable Energy Focus Pub Date : 2024-10-01 DOI: 10.1016/j.ref.2024.100645

Mengyu Li, Yong Li, Yongfa Diao

{"title":"A precise and efficient K-means-ELM model to improve ultra-short-term solar irradiance forecasting","authors":"Mengyu Li, Yong Li, Yongfa Diao","doi":"10.1016/j.ref.2024.100645","DOIUrl":"10.1016/j.ref.2024.100645","url":null,"abstract":"<div><div>To address the problems of intermittent and uncontrollable solar irradiance faced by grid-connected photovoltaic power plants, this paper proposes an ultra-short-term solar irradiance prediction model that combines K-means clustering with the Extreme Learning Machine (ELM). The K-means algorithm is first applied to cluster solar irradiance data from different seasons in Shanghai based on spatial similarity. Subsequently, the ELM algorithm is employed to train the model, significantly improving both prediction accuracy and training speed. Compared with the prediction accuracy of the model before clustering, the root-mean-square error (RMSE) of the clustered model is significantly reduced by 28.75 % in spring, and 0.30 %, 6.70 % and 5.92 % in summer, Autumn and winter, respectively. In addition, the model demonstrates stable predictive performance at different time resolutions (5, 10 and 15 minutes) with R2 values close to 1, confirming its accuracy and stability under small sample conditions. In terms of training speed, ELM’s training time is more than 100 times faster than Support Vector Regression (SVR) and significantly shorter than traditional models such as PSO-BP and Random Forest (RF), showing its great advantage in application scenarios that require fast response. Overall, the K-means-ELM model is able to accurately capture the overall trend and sudden changes in solar irradiance, which is of great application value for enhancing the efficiency and stability of solar power generation systems.</div></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100645"},"PeriodicalIF":4.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528874","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}

引用次数: 0

A novel hybrid spherical fuzzy multi-criteria decision-making approach to select the best hydroelectric power plant source in India 选择印度最佳水力发电厂来源的新型混合球形模糊多标准决策方法

IF 4.2

Renewable Energy Focus Pub Date : 2024-10-01 DOI: 10.1016/j.ref.2024.100650

Brajamohan Sahoo, Bijoy Krishna Debnath

{"title":"A novel hybrid spherical fuzzy multi-criteria decision-making approach to select the best hydroelectric power plant source in India","authors":"Brajamohan Sahoo, Bijoy Krishna Debnath","doi":"10.1016/j.ref.2024.100650","DOIUrl":"10.1016/j.ref.2024.100650","url":null,"abstract":"<div><div>Hydroelectric power plants (HPPs) play a crucial role in India’s energy portfolio by providing renewable energy and decreasing dependency on fossil fuels. HPPs assist in flood control, irrigation, and water management, thereby supporting agricultural and economic advancement. However, persistent challenges such as environmental consequences, habitat depletion, and resettlement complications impede project advancement. Striking a balance between these advantages and addressing social and environmental issues is essential for shaping India’s energy trajectory. In this manuscript to achieve these goals, the research paper incorporates the opinions of three decision-makers along with 20 criteria. Each criterion is associated with 5 alternatives and further categorized as beneficial and non-beneficial. To determine the optimal power plant, a novel hybrid Multi-Criteria Decision Making (MCDM) method is employed within a spherical fuzzy environment to handle the uncertainties occurred in the HPPs. This paper also introduces a novel formula for calculating the weights of decision-makers and a novel score function for converting spherical fuzzy numbers into crisp values. Initially to examine the interrelationship between these criteria the spherical fuzzy Decision Making Trial and Evaluation Laboratory (DEMATEL) method is utilized. The weight of the criteria is determined using the spherical fuzzy Stepwise Weight Assessment Ratio Analysis (SWARA) method, followed by determining the rank of the alternatives using the novel spherical fuzzy Multiple Criteria Ranking by Alternative Trace (MCRAT) method. Subsequently, the alternative with the highest score value is determined as the optimal choice for the hydroelectric power plant source in India. Furthermore, this research paper also discusses sensitivity analysis, comparative analysis, and the managerial implications of this study.</div></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100650"},"PeriodicalIF":4.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553403","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}

引用次数: 0

Flexible operation of nuclear hybrid energy systems for load following and water desalination 核电混合能源系统的灵活运行，用于负荷跟踪和海水淡化

IF 4.2

Renewable Energy Focus Pub Date : 2024-09-25 DOI: 10.1016/j.ref.2024.100641

An Ho , Blake W. Billings , John D. Hedengren , Kody M. Powell

{"title":"Flexible operation of nuclear hybrid energy systems for load following and water desalination","authors":"An Ho , Blake W. Billings , John D. Hedengren , Kody M. Powell","doi":"10.1016/j.ref.2024.100641","DOIUrl":"10.1016/j.ref.2024.100641","url":null,"abstract":"<div><div>Nuclear hybrid energy systems (NHES) have the potential to provide dependable and emission-free electricity to the grid while also increasing the flexibility and reliability of the electrical grid. Molten salt reactor (MSR) technology can provide consistent, carbon-free electricity while also increasing efficiency, security, and sustainability and reducing nuclear waste. This study investigates the integration of Molten Salt Reactors (MSR) and conventional Pressurized Water Reactors (PWR) with desalination technologies: Direct Contact Membrane Distillation (DCMD), Multi-Stage Flash Distillation (MSFD), and Reverse Osmosis (RO). Dynamic first-principles models were developed and tested using real grid data from the New York Independent System Operator. The results demonstrate that nuclear power is capable of flexibly responding to changing grid demand while simultaneously producing clean water, particularly during periods of low electricity demand. The MSR-RO system was found to be the most efficient in electricity generation and water production, and all hybrid systems reduced CO2 emissions by 356,000 to 682,000 tons annually. Economic analysis reveals that nuclear desalination technologies are cost-competitive with conventional systems, especially when paired with RO. These findings confirm the technical feasibility and environmental benefits of nuclear hybrid systems for sustainable electricity and water production.</div></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100641"},"PeriodicalIF":4.2,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326490","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}

引用次数: 0

A literature review of using supercritical CO2 for geothermal energy extraction: Potential, methods, challenges, and perspectives 利用超临界二氧化碳提取地热能的文献综述：潜力、方法、挑战和前景

IF 4.2

Renewable Energy Focus Pub Date : 2024-09-19 DOI: 10.1016/j.ref.2024.100637

Zhipeng Xu , Haochen Zhao , Longqing Fan , Qi Jia , Tiantian Zhang , Xuedan Zhang , Dongliang Han , Yufei Tan , Jing Liu

{"title":"A literature review of using supercritical CO2 for geothermal energy extraction: Potential, methods, challenges, and perspectives","authors":"Zhipeng Xu , Haochen Zhao , Longqing Fan , Qi Jia , Tiantian Zhang , Xuedan Zhang , Dongliang Han , Yufei Tan , Jing Liu","doi":"10.1016/j.ref.2024.100637","DOIUrl":"10.1016/j.ref.2024.100637","url":null,"abstract":"<div><p>In order to achieve the goal of carbon neutrality in the energy sector and promote sustainable economic development, it is critical to expand the depth of geothermal exploitation and accelerate the development of mid-deep geothermal energy. However, traditional hydrothermal geothermal systems are hindered by water scarcity, low heat extraction efficiency and so on. The solution may lie in using supercritical CO<sub>2</sub> (SCCO<sub>2</sub>) instead of water for geothermal extraction, which not only enables efficient geothermal exploitation but also allows for additional CO<sub>2</sub> sequestration. This paper begins by introducing the current status and characteristics of geothermal resources, including hot dry rock, deep saline aquifers, and depleted oil–gas reservoirs, along with a review of related engineering cases in the world. Additionally, the advantages of SCCO<sub>2</sub> compared to water in heat extraction are examined, and progress in the development of CO<sub>2</sub> geothermal systems, CO<sub>2</sub>-enhanced geothermal system (CO<sub>2</sub>-EGS) and CO<sub>2</sub> plume geothermal system (CPGS), is summarized, highlighting the challenges they face. Furthermore, the paper explains the additional benefits of CO<sub>2</sub> geothermal systems. In the end, future research trends and development strategies are presented. For CO<sub>2</sub>-EGS, reservoirs artificial fracturing technology should be the focus of future research. For CPGS, it is vital to improve the efficiency of heat extraction, with special attention given to the geothermal resources in depleted oil–gas reservoirs, particularly depleted gas reservoirs. The practical application of CO<sub>2</sub> geothermal systems requires the efforts of governments, research institutions, enterprises, and other stakeholders to work together.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100637"},"PeriodicalIF":4.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270345","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}

引用次数: 0

Solving congestions with pumped hydro storage under high penetration of renewable energy in Vietnam: The case of Ninh Thuan HV grid 利用抽水蓄能解决越南可再生能源高渗透率情况下的拥堵问题：宁顺高压电网案例

IF 4.2

Renewable Energy Focus Pub Date : 2024-09-18 DOI: 10.1016/j.ref.2024.100638

Thi-Thuy-Hang Le , Eleonora Riva Sanseverino , Quang-Ninh Nguyen , Maria Luisa Di Silvestre , Salvatore Favuzza , Dinh Quang Nguyen , Rossano Musca

{"title":"Solving congestions with pumped hydro storage under high penetration of renewable energy in Vietnam: The case of Ninh Thuan HV grid","authors":"Thi-Thuy-Hang Le , Eleonora Riva Sanseverino , Quang-Ninh Nguyen , Maria Luisa Di Silvestre , Salvatore Favuzza , Dinh Quang Nguyen , Rossano Musca","doi":"10.1016/j.ref.2024.100638","DOIUrl":"10.1016/j.ref.2024.100638","url":null,"abstract":"<div><p>Renewable energy sources are increasingly penetrating all power networks worldwide, despite the security status of these networks threatened by the fickle nature of these sources. Ninh Thuan Province (Vietnam) experienced a solar power boom in 2019–2021 and, with it, the congestion of both the local transmission and distribution networks. To solve congestions and operational security issues, large-scale storage solutions were considered and, due to land availability, Pumped Hydro Storage (PHS) technology was selected to solve these problems. However, the operational risks of cascade outage when integrating both renewables and a PHS system needs to be carefully considered, especially in a bulk power system. For this reason, this study examined the potential of integrating a large-scale grid-connected PHS system in ensuring operational security against the impacts of solar power plants in Ninh Thuan. The analyses of static and dynamic security were carried out for scenarios with and without the PHS system, including under current operational conditions. The results of the simulations show that the presence of the PHS improves both static and dynamic performance of the system, thus allowing full exploitation of solar power and avoiding curtailment. NEPLAN environment was chosen to simulate all scenarios under the Vietnamese grid code.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100638"},"PeriodicalIF":4.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1755008424001029/pdfft?md5=0ae98ff2929ab3b8d54ed51bd9bb761a&pid=1-s2.0-S1755008424001029-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271010","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}

引用次数: 0

A security-preserving framework for sustainable distributed energy transition: Case of smart city 可持续分布式能源转型的安全保护框架：智慧城市案例

IF 4.2

Renewable Energy Focus Pub Date : 2024-09-13 DOI: 10.1016/j.ref.2024.100631

Dorna Tahmasebi , Morteza Sheikh , Morteza Dabbaghjamanesh , Tao Jin , Abdollah Kavousi-Fard , Mazaher Karimi

{"title":"A security-preserving framework for sustainable distributed energy transition: Case of smart city","authors":"Dorna Tahmasebi , Morteza Sheikh , Morteza Dabbaghjamanesh , Tao Jin , Abdollah Kavousi-Fard , Mazaher Karimi","doi":"10.1016/j.ref.2024.100631","DOIUrl":"10.1016/j.ref.2024.100631","url":null,"abstract":"<div><p>The proliferation of smart devices that complement the energy system in order to make it easier to change the appearance of unique and autonomous energy systems and make them more manageable, causes the biggest problems in energy management in smart cities. With these promising results, storing data exchange between the smart city and its components of renewable sources and storage will reduce the risk of cyber-attacks in the energy system. To solve these problems, this paper proposes a reliable and privacy-preserving distributed model for the transition to smart cities, emphasizing the integration of renewable energy sources such as wind, solar, and tidal power into the urban energy ecosystem. For this purpose, a distributed model-based two-dimensional multiplicative method (PDMM) and a design-based model have been developed as a fast method to solve energy problems in smart cities. The results will show that PDMM performs well in large-scale optimization problems. To protect data privacy, the method of secure data exchange is based on a modified acyclic graph based on blockchain. Detailed numerical results demonstrate the performance of the proposed method based on the dynamic force curve. The results prove that the proposed model was able to get to an optimal and true consensus among agents with very low error values.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100631"},"PeriodicalIF":4.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270301","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}

引用次数: 0