Energy technology最新文献_第8页

Liquid Piston Compression Heat Transfer Prediction via Thermal-Resistance Network: Simulation, Experimental Validation, and Liquid Carryover Evaluation 通过热阻网络的液体活塞压缩传热预测：模拟，实验验证和液体携带评估

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-19 DOI: 10.1002/ente.202401121

Luke Middleton, Marco Bernagozzi, Rob Morgan, Gareth Milton, Andrew Atkins, Penny Atkins

{"title":"Liquid Piston Compression Heat Transfer Prediction via Thermal-Resistance Network: Simulation, Experimental Validation, and Liquid Carryover Evaluation","authors":"Luke Middleton, Marco Bernagozzi, Rob Morgan, Gareth Milton, Andrew Atkins, Penny Atkins","doi":"10.1002/ente.202401121","DOIUrl":"https://doi.org/10.1002/ente.202401121","url":null,"abstract":"Liquid piston compressors gain attention due to their potential for more efficient and isothermal compression compared to traditional solid piston compressors. Liquid piston compressors use a liquid column instead of a solid piston, allowing for innovative mechanisms to enhance heat transfer and achieve near-isothermal compression. However, a validated analytical model for heat transfer in liquid piston compressors is still needed to understand the exhaust phase within a liquid piston. In this work, a thermal network model, able to predict the polytropic index to within 8% of the experimental results, is proposed. Moreover, thorough experimentation is conducted to measure the amount of liquid carried over to better understand the exhaust phase. In the results, it is revealed that the piston carries over 13–21 mL of liquid within the exhaust gas for 10–23 s of stroke. Notably, the difference in liquid carried over for the three-stroke times is not statistically significant, indicating that the liquid carried over is a function of liquid piston design and not stroke time. Finally, most liquid piston applications consider only water; hence, for the first time, this research assesses the stability of a cycle using a nonflammable hydraulic fluid (Fuchs 46 M red) to enhance compressor longevity and material compatibility.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"12 12","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202401121","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation and Experimental Research on a New Symmetrical Hydraulic Piezoelectric Energy Harvester 新型对称液压压电能量收集器的仿真与实验研究

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-19 DOI: 10.1002/ente.202400867

Wenjie Zhang, Yang Shang, Hongyu Jiang, Fanxin Meng, Haixia Zhao, Weijie Shi

{"title":"Simulation and Experimental Research on a New Symmetrical Hydraulic Piezoelectric Energy Harvester","authors":"Wenjie Zhang, Yang Shang, Hongyu Jiang, Fanxin Meng, Haixia Zhao, Weijie Shi","doi":"10.1002/ente.202400867","DOIUrl":"10.1002/ente.202400867","url":null,"abstract":"This study introduces a new symmetrical hydraulic piezoelectric energy harvester. By integrating theoretical analysis, simulation, and empirical testing, the research delves into the energy-harvesting potential of monolithic single-side output, monolithic two-side parallel-connected output, stacked one-side parallel-connected output, and stacked two-side parallel-connected output under varying parameter configurations. Additionally, it elucidates the energy dissipation occurring during the energy-harvesting process of stacked piezoelectric disks. It has been observed that the primary determinant of voltage is the amplitude of pulsation, not the static pressure. Concurrently, the study also addresses the consistency of power generation between multiple channels. A study is made on whether there is a proportional relationship between single-channel power generation and multi-channel power generation. The root mean square (RMS) voltage of each connection sharply rises with resistance from 2 to 100 KΩ. It is found that the performance of parallel connection of monolithic piezoelectric disk is better than that of other connection methods. At 3 MPa and 100 Hz, the optimal resistance is 16 KΩ, yielding a maximum average power of 1155.63 μW and an optimal power density of 1.774 μW (bar mm3)−1. Consequently, the research offers a novel approach to addressing the issue of sustainable energy supply for low-power electronic devices and sensors.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"12 11","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 Self-Reconfigurable Battery Pack Design with and without Active Cell Balancing 带主动电池平衡和不带主动电池平衡的新型可自重构电池组设计

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-18 DOI: 10.1002/ente.202401055

Anirudha Bajaj, Wei Li, Maokun Xiong, Jianhui Mou, Akhil Garg, Liang Gao, Bibaswan Bose

引用次数: 0

Theoretical Investigation on Carbazole Derivatives as Charge Carriers for Perovskite Solar Cell 咔唑衍生物作为包晶太阳能电池电荷载体的理论研究

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-18 DOI: 10.1002/ente.202400918

Samrudhi B. M., Abdennacer Idrissi, Said Bouzakraoui, Manoj V. Mane, Deepak Devadiga, Ahipa T. N.

{"title":"Theoretical Investigation on Carbazole Derivatives as Charge Carriers for Perovskite Solar Cell","authors":"Samrudhi B. M., Abdennacer Idrissi, Said Bouzakraoui, Manoj V. Mane, Deepak Devadiga, Ahipa T. N.","doi":"10.1002/ente.202400918","DOIUrl":"10.1002/ente.202400918","url":null,"abstract":"The study explores carbazole-based organic molecules as transport layers in durable perovskite solar cells, focusing on their optoelectronic and charge transfer properties. Thirteen carbazole derivatives are systematically analyzed via density functional theory (DFT) calculations to understand their structure and optoelectronic characteristics. Substituents like bromo, phenyl, thiophenyl, and pyridyl at positions 3,6- and 2,7- of carbazole were studied. Phenyl and thiophenyl substitutions lowered highest occupied molecular orbital (HOMO) energy levels, while bromo and pyridyl increased them, tuning HOMO energies from −5.45 to −6.03 eV. These energies align well with perovskite materials valence bands, with absorbance primarily below 400 nm, complementing perovskite absorption. The compounds showed high light-harvesting efficiencies (LHEs) (0.22 to 0.94) and improved radiative lifetimes. Theoretical investigations identified most compounds as effective p-type hole-transport materials (HTM), except 3,6- and 2,7-dithiophenyl carbazoles, which exhibited n-type behavior due to low hole reorganization energies. Overall, the study highlights computational design's role in developing carbazole derivatives as promising charge carrier precursors for perovskite solar cells.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"12 11","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasmall Fe-Nanoclusters-Anchored Carbon Polyhedrons Interconnected with Carbon Nanotubes for High-Performance Zinc-Air Batteries 与碳纳米管互连的超小型铁纳米团簇碳多面体用于高性能锌-空气电池

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-18 DOI: 10.1002/ente.202401339

Haihua Wu, Feng Wu, Juanjuan Zhai, Yudan Li, Xin Xu, Yunfang Gao

{"title":"Ultrasmall Fe-Nanoclusters-Anchored Carbon Polyhedrons Interconnected with Carbon Nanotubes for High-Performance Zinc-Air Batteries","authors":"Haihua Wu, Feng Wu, Juanjuan Zhai, Yudan Li, Xin Xu, Yunfang Gao","doi":"10.1002/ente.202401339","DOIUrl":"10.1002/ente.202401339","url":null,"abstract":"\u0000The catalytic activity of metal catalyst is closely related to its particle size. Yet, the size effect in electrocatalytic oxygen reduction reaction (ORR), an important reaction for metal-air batteries and fuel cells, has not been clearly studied. Herein, a two-step anchoring method is utilized to control the Fe catalyst in forms of nanoparticles (NPs), ultrasmall nanoclusters (NCTs), and isolated atoms as well as stabilized and dispersed by carbon polyhedrons interconnected with carbon nanotubes (CNTs). The uniformly distributed Fe NCTs displays superior ORR performance compared with Fe NPs, isolated Fe atoms, and commercial Pt/C. The brilliant ORR activity of Fe NCTs is a result of its unique electron structure and abundant edge and corner active sites. Due to the porous structure of carbon polyhedrons and high electron conductivity of CNTs, Fe NCTs also delivers an excellent discharge performance in zinc-air battery with a peak power density of 213.3 mW cm−2 and long-term stability. In these findings, a new strategy for the design of metal NCTs catalysts applied in various catalytic reactions is opened up.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"12 12","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

State of Health Estimation of Lithium-Ion Batteries Based on Differential Thermal Voltammetry and Improved Gray Wolf Optimizer Optimizing Gaussian Process Regression 基于差热伏安法和优化高斯过程回归的改进型灰狼优化器的锂离子电池健康状况评估

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-17 DOI: 10.1002/ente.202400996

Peng Xu, Wenwen Ran, Yuan Huang, Yongtai Xiang, Yuhong Liu, Kelin Xiao, Chaolin Xu, Shibin Wan

{"title":"State of Health Estimation of Lithium-Ion Batteries Based on Differential Thermal Voltammetry and Improved Gray Wolf Optimizer Optimizing Gaussian Process Regression","authors":"Peng Xu, Wenwen Ran, Yuan Huang, Yongtai Xiang, Yuhong Liu, Kelin Xiao, Chaolin Xu, Shibin Wan","doi":"10.1002/ente.202400996","DOIUrl":"10.1002/ente.202400996","url":null,"abstract":"Accurate estimation of the state of health (SOH) of lithium-ion batteries (LIBs) is essential for their safe operation. Therefore, herein, a novel approach that combines Gaussian process regression (GPR) optimized using an improved gray wolf optimizer (IGWO) with differential thermal voltammetry (DTV) is introduced. In this approach, the peak and valley information of the DTV curves are used to reveal the battery-aging mechanisms, with the slopes and durations between peaks and valleys used as health characteristics. The correlation between the characteristics and SOH of the battery is analyzed to build a health feature dataset. IGWO optimizes the GPR hyperparameters to address their dependence on the initial values and susceptibility to local optimization and employs a dimension-learning strategy to enhance the population diversity and prevent premature convergence. DTV curves and an IGWO-GPR model for SOH estimation using four cells from the NASA LIB public aging dataset are developed and validated. The results show root mean square errors below 0.007 and mean absolute errors under 0.006 for all cells. The coefficient of determination exceeds 0.92 for three cells, with one battery exhibiting a value of 0.866. This method provides accurate and efficient SOH estimation, essential for safe battery operation.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research Progress on Characteristics of On-Line Hydrogen Production by Methanol Steam Reforming 甲醇蒸汽转化在线制氢特性的研究进展

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-17 DOI: 10.1002/ente.202400987

Bin Chen, Zonghua Wang

引用次数: 0

Hydrogen Infrastructure in the Future CO2-Neutral European Energy System—How Does the Demand for Hydrogen Affect the Need for Infrastructure?

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-16 DOI: 10.1002/ente.202300981

Tobias Fleiter, Joshua Fragoso, Benjamin Lux, Şirin Alibaş, Khaled Al-Dabbas, Pia Manz, Felix Neuner, Bastian Weißenburger, Matthias Rehfeldt, Frank Sensfuß

{"title":"Hydrogen Infrastructure in the Future CO2-Neutral European Energy System—How Does the Demand for Hydrogen Affect the Need for Infrastructure?","authors":"Tobias Fleiter, Joshua Fragoso, Benjamin Lux, Şirin Alibaş, Khaled Al-Dabbas, Pia Manz, Felix Neuner, Bastian Weißenburger, Matthias Rehfeldt, Frank Sensfuß","doi":"10.1002/ente.202300981","DOIUrl":"https://doi.org/10.1002/ente.202300981","url":null,"abstract":"The fast rollout of hydrogen generation, transport, and storage infrastructure has become a top priority of the European Union and its member states. Planning hydrogen infrastructure requires a thorough understanding of the future role of hydrogen in the energy system. At the same time, there is still huge uncertainty about the future demand for hydrogen and its overall role. An energy systems analysis is conducted with high temporal and spatial as well as technological resolution under alternative demand scenarios. An energy system model is used to optimize the entire European energy system with hourly time resolution and high spatial consideration of renewable energy potentials. The hydrogen demand in the five scenarios ranges from about 700 TWh for mainly industrial uses to 2800 TWh in all sectors in the EU27 + UK by 2050. The results show that an integrated European hydrogen system is a robust element of the cost-optimal system design in all scenarios. This encompasses flexible electrolyzers at the most favorable wind and solar locations, long-distance hydrogen transport network, large-scale seasonal underground storage, and electricity generation for peak demand periods. Conclusions about the individual components are provided and high-resolution data on hydrogen demand are available for future research.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 2","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202300981","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Economic Analyses of a New Power and Cooling System at Low Temperature Applications 一种新型低温动力和冷却系统的经济分析

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-16 DOI: 10.1002/ente.202401246

Munisamy Omprakash, Narayanan Shankar Ganesh

{"title":"Economic Analyses of a New Power and Cooling System at Low Temperature Applications","authors":"Munisamy Omprakash, Narayanan Shankar Ganesh","doi":"10.1002/ente.202401246","DOIUrl":"https://doi.org/10.1002/ente.202401246","url":null,"abstract":"Recent research suggests that the implementation of more efficient combined cooling and power systems, which enable the cogeneration of electricity and cooling, can enhance the efficiency of hybrid plants. The present investigation is motivated by finding that, in the literature review on combined power and cooling systems, there is very limited information on the coupling of the organic Rankine cycle (ORC) and the ejector refrigeration cycle (ERC) with low sink temperatures. A suggested approach to do this involves using hot exhaust gas and waste heat engines to power an ORC hybrid system. To enhance the ORC–ERC system's performance, three heater configurations use waste heat from the ORC turbine exhaust, ejector, and engine waste heat to heat the working fluid. Renewable energy sources are the primary focus of most current research initiatives. The present research focuses on unique ORC and ERC systems, considered as combined power and cooling systems, with the goal of improving exergy performance at low temperatures. The suggested ORC–ERC can generate energy destruction of 69.85 kW at a source temperature of 155 °C, with an exergetic efficiency of 76.9% at the turbine. Setting the entrainment ratio at 0.5 results in a total sum unit cost of products (SUCP) of 465 $/kW-h for the ORC–ERC. Furthermore, the 37.83% exergy destruction ratio introduces heat exchanger 2 (HE2) as the primary cause of the suggested ORC–ERC's irreversibility. A detailed parametric study reveals that altering the hot source temperature and entrainment ratio improves the system's SUCP. The current examination at high sink temperatures may be expanded to an advanced exergoenvironmental investigation.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"12 12","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of Bi-Functional Samarium Oxide/Copper Oxide Nanocuboid Electrocatalyst for Electrochemical Water Splitting 双功能氧化钐/氧化铜纳米立方体电催化剂的制备及电化学水分解

IF 3.6 4区工程技术

Energy technology Pub Date : 2024-09-16 DOI: 10.1002/ente.202400502

Muhammad Kashif Saleem, Niaz Ahmad Niaz, Abdul Shakoor, Fayyaz Hussain, Sumaira Manzoor, Safyan Akram Khan, Duncan H. Gregory

{"title":"Fabrication of Bi-Functional Samarium Oxide/Copper Oxide Nanocuboid Electrocatalyst for Electrochemical Water Splitting","authors":"Muhammad Kashif Saleem, Niaz Ahmad Niaz, Abdul Shakoor, Fayyaz Hussain, Sumaira Manzoor, Safyan Akram Khan, Duncan H. Gregory","doi":"10.1002/ente.202400502","DOIUrl":"https://doi.org/10.1002/ente.202400502","url":null,"abstract":"The development of low-cost, high-performance electrocatalysts for the oxygen evolution reaction (OER) is essential for a vast array of chemical and energy transformation applications. Using non-platinum metals as electrocatalysts in a key process such as OER has become increasingly attractive given their relatively low cost, high electrocatalytic activity, and low environmental impact. Herein, to achieve a better catalytic material with high permeability and mass charge transfer in a catalytic framework, a novel, oxygen-defective Sm2O3/CuO nanohybrid with nanocuboid architecture is developed. The creation of a new composite material which consist of samarium oxide and copper oxide, demonstrates high effectiveness in the process of electrochemical water splitting. The combined use of samarium oxide and copper oxide improves the electrocatalytic performance, stability, and durability due to it synergistic effect. In alkaline media, the Sm2O3/CuO nanocomposite exhibits an astonishing overpotential of 248 mV along with a lower Tafel value of 46 mVdec−1 for OER and nanocomposite also exhibits acceptable hydrogen evolution reaction (HER) performance. Due to the unprecedented porous nanocuboid morphology and the strong synergistic effect between the two materials, the oxygen-defective Sm2O3/CuO composite exhibits impressive electrical properties and performs exceptionally well as an electrocatalyst for intrinsic water splitting. At an operational potential of 0.5 V, porous Sm2O3/CuO displays outstanding reactivity, Sm2O3/CuO exhibits remarkable results during electrochemical operation.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"12 12","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0