Clean Energy最新文献

{"title":"Scenario of solar energy and policies in India","authors":"S. M, Prity Kumari, Y. A. Lad, Sherin Maria","doi":"10.1093/ce/zkae057","DOIUrl":"https://doi.org/10.1093/ce/zkae057","url":null,"abstract":"\u0000 Solar power is energy from the sun that is converted into thermal or electrical energy. China, the USA, and India have the world's richest solar energy sources. India receives solar radiation with an average intensity of 200 MW/km2 and 250-300 sunny days a year. The solar radiation in India varies from 4 to 7 kWh/m2/day, with 2300 to 3200 sunshine hours yearly, depending on the region. Badhla Solar Park, Jodhpur, India, is the world's largest solar plant, with a 2.25 GW installed capacity. Solar energy is the best alternative electricity source used explicitly in the agricultural sector. In the farming sector, the consumption of solar energy has been increasing. The major issues were the installation costs, low availability of technicians, and poor quality of panels. The focus on skill development equips the workforce to drive innovation, efficiency and sustained growth in the renewable energy field. With the support of international collaboration and a skilled workforce, India's progress in solar energy development is a boon for the industry.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141822166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Fault Clearing Algorithm for Renewable Energy-based Distribution Systems Using Artificial Neural Networks","authors":"Rania G. Mohamed, M. A. Ebrahim, Shady H. E. Abdel Aleem","doi":"10.1093/ce/zkae056","DOIUrl":"https://doi.org/10.1093/ce/zkae056","url":null,"abstract":"\u0000 Integrating small and large-scale photovoltaic solar systems into electrical distribution systems becomes mandatory due to the increased electricity bills and the concern for limiting greenhouse gases. However, the reliable and efficient operation of photovoltaic-based distribution systems can be confronted by the intermittent and high variability of solar source and their consequent faults. In this regard, this article suggests a moderated fault-clearing strategy based on the incremental conductance-maximum power point tracking technique and artificial neural networks to enhance fault detection, localization, and restoration processes in photovoltaic-based distribution systems. The proposed strategy leverages incremental conductance-maximum power point tracking to ensure optimal power generation from the photovoltaic solar system, even in the presence of faults. By tracking the maximum power point, the algorithm maintains the system’s performance and mitigates the impact of faults on the output power. Furthermore, an artificial neural network is employed to improve fault detection and localization accuracy. The developed artificial neural network-based moderated fault-clearing strategy is trained using historical data and fault scenarios, enabling it to recognize fault patterns and make informed decisions through extensive simulations and comparisons with traditional fault-clearing methods. To accomplish this study benchmarks in photovoltaic-based distribution systems are constructed and employed using the MATLAB®/Simulink® software package. Moreover, to validate the efficacy of the developed artificial neural network-based moderated fault-clearing strategy a real case study of 1 MW photovoltaic-based distribution systems in an industrial field located in Giza governorate, Egypt, is tested and investigated. The obtained results demonstrate the effectiveness of incremental conductance- maximum power point tracking and artificial neural network-based moderated fault-clearing strategy in achieving faster fault detection, precise fault localization, and efficient restoration in photovoltaic solar-based distribution systems while preserving maximum power extraction under small and large system disturbances. Furthermore, incremental conductance- maximum power point tracking based on an artificial neural network achieves an average power of 98.556 kW and 299.632 kWh energy availability, whereas the incremental conductance-maximum power point tracking based on proportional-integral controller achieves 95.7996 kW and 283.4036 kWh, and classical perturb and observe maximum power point tracking algorithm achieves 92.2657 kW and 276.8014 kWh.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141656801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A numerical investigation on the effect of altering compression ratio, injection timing, and injection duration on the performance of a diesel engine fuelled with diesel-biodiesel-butanol blend","authors":"Abdulkarim Youssef, Amr Ibrahim","doi":"10.1093/ce/zkae055","DOIUrl":"https://doi.org/10.1093/ce/zkae055","url":null,"abstract":"\u0000 Using renewable fuels for diesel engines can reduce both air pollution and dependence on fossil fuels. A computer simulation was constructed to predict the performance, combustion characteristics, and NOx emission of a diesel engine fuelled with diesel-biodiesel-butanol blends. The simulation was validated by comparing the modeling results against experimental data and a good agreement between the results was found. The fuels used for the validation were diesel (B0), biodiesel (B100), diesel-biodiesel blend (B50), and two diesel-biodiesel-butanol blends with 45% diesel-45% biodiesel-10% butanol (Bu10), and 40% diesel-40% biodiesel-20% butanol (Bu20) by volume. Experimental results showed that the addition of butanol reduced NOx emissions but deteriorated the engine performance. The aim of the current work was the numerical optimization of the different parameters to enhance the engine performance while using butanol to decrease NOx emissions. The engine compression ratio (CR) varied from 14 to 24, in increments of 2. Fuel injection timing (IT) was retarded from 30° before top dead center (bTDC) to 5° bTDC in increments of 5o. Also, the fuel injection duration (IDur) was extended from 20° to 50° in increments of 10°. Results showed that the increase in CR improved engine performance for the two investigated fuels, Bu10 and Bu20. The maximum engine brake power (BP), thermal efficiency (BTE), and minimum brake-specific fuel consumption (BSFC) of 1.46 kW, 32.3%, and 0.273 kg/kWh respectively, were obtained when the Bu10 fuel was injected at the optimum conditions of 24 CR, 15°bTDC IT, and 40° injection duration (IDur). Under these optimum conditions, the BP, BTE, and BSFC improved by 3% to 3.5% for Bu10 and Bu20 fuel blends compared to the base engine conditions of CR of 22, 30° IDur, and 10° bTDC IT.\u0000 The heat release rate during the premixed phase increased when the IT was advanced, while the mixing-controlled combustion phase was enhanced when the IT was retarded. NOx emissions increased with increasing the CR, while both the increase in IDur at constant IT and the retard of IT decreased engine NOx emissions. At the optimum conditions, the NOx emissions for Bu10 and Bu20 were further decreased by 2.2% and 0.9% respectively compared to the experimental results at base engine conditions. Retarding the injection timing from 15° bTDC to 5° bTDC at a CR of 24 and IDur of 40° caused the NOx emissions for Bu10 and Bu20 to decrease by 16%. When the injection duration was increased from 20° to 50° at a CR of 24 and an IT of 15°bTDC, the NOx emissions for Bu10 and Bu20 decreased by 12.3% and 11.8% respectively.\u0000 The addition of butanol to the diesel-biodiesel blend at optimum conditions showed results comparable to pure diesel, with a decrease in NOx emissions.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141659055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved Sliding Mode Control for Tracking Global Maximum Power of Triple Series Parallel Ladder Photovoltaic Array under Uneven Shadowing","authors":"RamaKoteswaraRao Alla, Kandipati Rajani, Ravindranath Tagore Yadlapalli","doi":"10.1093/ce/zkae054","DOIUrl":"https://doi.org/10.1093/ce/zkae054","url":null,"abstract":"\u0000 This paper presents an innovative way for enhancing the performance of photovoltaic arrays under uneven shadowing conditions. The study focuses on a triple series parallel ladder configuration to exploit the benefits of increased power generation while addressing the challenges associated with uneven shadowing. The proposed methodology focuses on the implementation of improved sliding mode Control technique for the global maximum power point tracking efficiently. Sliding mode control is known for its robustness in the presence of uncertainties and disturbances, making it suitable for dynamic and complex systems such as photovoltaic arrays. This work employs a comprehensive simulation framework to comment the performance of the suggested improved sliding mode control strategy at uneven shadowing scenarios. Comparative analysis has been done to show the effectiveness of the suggested method than the traditional control strategies. The results demonstrate a remarkable enhancement in the tracking accuracy of the global maximum power point, leading to enhanced energy harvesting capabilities under challenging environmental conditions. Furthermore, the proposed approach exhibits robustness and adaptability in mitigating the effect of shading on the photovoltaic array, thereby increasing overall system efficiency. This research contributes valuable insights into the development of advanced control strategies for photovoltaic arrays, particularly in the context of triple series parallel ladder configurations operating under uneven shadowing conditions. Under short narrow shading condition, the improved sliding mode control method tracking the maximum power more compared to perturb & observe is 20.68%, incremental conductance is 68.78%, fuzzy incremental conductance is 19.8%, and constant velocity sliding mode control is 1.25%. The improved sliding mode control method has 60% less chattering than constant velocity sliding mode control under shading conditions.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141660976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Could hydrogen gas be produced using human cells?","authors":"T. Catal","doi":"10.1093/ce/zkae034","DOIUrl":"https://doi.org/10.1093/ce/zkae034","url":null,"abstract":"\u0000 Although fossil fuels are widely used to meet energy needs, intensive research has been carried out in recent years on hydrogen production from renewable sources due to their decrease over time and environmental pollution concerns. Biofuel cell technology is one of the promising current technologies. It has been proven that various microorganisms produce energy through their natural metabolism, and that energy production is produced in biofuel cells by exoelectrogenic microorganisms that can transfer electrons to an electrode surface. Although it has been stated that employing human cells to generate energy is feasible, it is unknown whether doing so would enable the production of hydrogen. Within the scope of this perspective article, the issue of hydrogen production in bioelectrolysis cells using human cells will be discussed for the first time. Optimizing hydrogen production in bioelectrolysis cells using human cells is important in terms of contributing to hydrogen technologies. Within the scope of the article, promising human cell lines for hydrogen production are emphasized and hydrogen production potentials in bioelectrolysis cells using these cell lines are discussed. In conclusion, some human cells can be used for hydrogen gas production in bioelectrolysis cells due to their bioelectrochemical and metabolic properties.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141678986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Expert perspective on technological choice for cooking energy transition in Nepal","authors":"Dipesh Kc, S. P. Lohani, Poushan Shrestha, Chunyu Xue","doi":"10.1093/ce/zkae035","DOIUrl":"https://doi.org/10.1093/ce/zkae035","url":null,"abstract":"\u0000 Solid biomass dominates as the primary source of cooking energy, especially in rural households of Nepal. The use of solid biomass has a detrimental effect on health, exacerbates the burden of biomass collection, and hampers access to clean energy. Understanding the factors influencing the choice of modern cooking fuels is crucial to improving energy security and resilience and easing the transition to clean fuels. This study evaluates technological choices for the transition in cooking energy from the perspective of experts working in the government, non-government, and academia sectors. A structured questionnaire survey was prepared with five criteria and nine cooking technology options. Fifty-one experts responded to the survey, and their responses were analyzed using the analytical hierarchy process. The study reveals that efficiency and capital cost are the primary criteria for selecting cooking technology. The most suitable clean cooking technology is an induction stove followed by a hot plate, while the least preferred technology is a Bayupankhi stove followed by two-pothole mud improved cooking stoves. To ensure the robustness of the method, sensitivity analysis was performed on the two primary criteria efficiency and capital cost of the cooking technology. The analysis revealed robust and consistent rankings of technologies. This study should help create a conducive environment for relevant stakeholders and policymakers to formulate and implement relevant policies and strategies to accelerate the cooking energy transition in Nepal.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141678678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A method for determining the layout of a yaw system based on the Delphi method and the analytic hierarchy process","authors":"ShuTing Lin, Lanxing Lu, Peng Zhang, Hua Li","doi":"10.1093/ce/zkae038","DOIUrl":"https://doi.org/10.1093/ce/zkae038","url":null,"abstract":"\u0000 Wind power technology has been widely used due to its characteristics of environmental protection, sustainability and low cost. The yaw system plays a vital role in improving the energy capture efficiency of a wind turbine. However, the method of layout determination is lacking in the yaw system. To solve this problem, a method that combines the Delphi method and the analytic hierarchy process was proposed in this study. Twelve evaluation indexes, including transmission efficiency, ratio range, operating temperature range and others, were identified by screening 18 technical indicators using the Delphi method. Subsequently, the evaluation system of the yaw system was established. Then, six configuration schemes were selected. Experts’ scores of schemes were collected according to the evaluation system and the score matrix of evaluation indexes was obtained. The hierarchical model of the evaluation indexes of the yaw system was established and the comprehensive weight was obtained by using the analytic hierarchy process. After calculating the comprehensive evaluation score, the comprehensive evaluation result was obtained. The 2Z-X(A) negative mechanism, which achieved the highest score of 0.9227, is the optimal scheme. A new method and specific process are provided for designers. The research gap in the scheme selection method for yaw systems is filled.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141679587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the influence of optical and thermal parameters on the effectiveness of parabolic trough collector receiver units","authors":"Khaled Mohamad","doi":"10.1093/ce/zkae033","DOIUrl":"https://doi.org/10.1093/ce/zkae033","url":null,"abstract":"\u0000 This study investigates the optimization of physical parameters in a parabolic trough collector receiver unit to improve its thermal and optical performance. The parameters include the transmissivity, reflectivity, absorptivity, emissivity and thermal conductivity of the outer cover and absorber pipe. This study utilizes a novel experimental design and a simulation model that accounts for the infrared reflectivity inside the receiver. The simulation results were validated by the experimental data, with a maximum deviation of 8%. The study analyses the effects of varying the physical parameters on the heat transfer fluid temperature, total plant efficiency, temperature profiles, temperature gradients and thermal stress. The study finds that increasing the reflectivity and decreasing the emissivity of the outer cover and the absorber pipe significantly enhance the performance, with maximum increases of 25.8% and 26.5% in total efficiency, respectively. The study also finds that increasing the thermal conductivity of the absorber pipe reduces the temperature gradients and thermal stress, with maximum decreases of 42.2% and 29%, respectively. This study provides valuable insights for optimizing the receiver design and operation in solar–thermal systems.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141688453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overview of coals as carbon anode materials for sodium-ion batteries","authors":"Junli Kong, Zhijiang Su, Chunwei Dong, Quanbin Chen, Guanghong Pan","doi":"10.1093/ce/zkae048","DOIUrl":"https://doi.org/10.1093/ce/zkae048","url":null,"abstract":"\u0000 Energy storage is an important technology in achieving carbon neutrality goals. Compared with lithium-ion batteries, the raw materials of sodium-ion batteries are abundant, low-cost and highly safe. Furthermore, their costs are expected to be further reduced as large-scale applications take off, making them viable for energy storage applications. The primary anode material for sodium-ion batteries is hard carbon, which has a high sodium-ion storage capacity but is relatively expensive, limiting its applications in energy storage. In order to widen the applications of sodium-ion batteries in energy storage and other fields, it is particularly important to develop anode materials that have both high performance and low cost. Coals, with abundant reserves and worldwide availability, can serve as low-cost carbon sources for anode materials. Additionally, coals of different grades of metamorphism have different structural characteristics that can be tailored for the structural characteristics of coal-based anode materials for sodium-ion batteries. Recent researches on tailoring coals as the anode materials for sodium-ion batteries is summarized and the recent progress made towards mitigating the existing issues is analysed in this review. Specifically, the impacts of different grades of metamorphism on the sodium-ion storage performance of coal-based anode materials prepared with direct carbonization are discussed in detail. Studies on improving the electrochemical performances of coal-based anode materials through pore and microcrystalline structure controls, and surface as well as interface modifications are presented. Finally, the advantages and disadvantages of different preparation methods are identified. To make the industrial applications of coal-based anode materials for sodium-ion batteries more viable, the importance of the de-ashing process is introduced.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141383166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal Scheduling of Grid-side Flexibility Resources and Auxiliary Service Cost Allocation Model Considering New Energy Penetration","authors":"Bin Bai, Yanli Xiao, Rui Zhao, Xinrui Ju, Shangke Liu","doi":"10.1093/ce/zkae039","DOIUrl":"https://doi.org/10.1093/ce/zkae039","url":null,"abstract":"\u0000 Renewable energy has penetrated power grid enterprises on a large scale. Due to the intermittency and volatility of renewable energy generation, it is necessary to build new flexible grid-side resources to ensure the safe and stable operation of the power grid, which will cause great pressure on cost allocation for power grid enterprises. This article considers four types of flexible grid-side resources and constructs a dual-level configuration optimization model for flexible grid-side resources under the penetration of renewable energy. Based on the configuration results, the cost scale of flexible grid-side resources is estimated, and an improved ancillary service cost allocation model based on the Shapley value method is proposed to smooth the allocation of ancillary service costs in the cost of flexible grid-side resources between the two main bodies of renewable energy and load. The calculation results show that when the penetration rate of renewable energy power is 30% and 35%, respectively, the cost of flexible grid-side resources is 9.606 billion yuan and 21.518 billion yuan, respectively. The proportion of ancillary service costs allocated to load is relatively high, about five times that of the ancillary service costs allocated to renewable energy, and the higher the penetration rate of renewable energy, the higher the proportion of ancillary service costs allocated to renewable energy.","PeriodicalId":36703,"journal":{"name":"Clean Energy","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141111045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}