检索结果-内蒙古大学图书馆

A comprehensive 3D-CFD analysis of operational and geometric effects on hydrogen absorption in MH reactor equipped with finned and tubular heat exchangers

引用

International Journal of Hydrogen energy 2025年 135卷 553-570页

作者： Bammoune, Abdelaziz Laouedj, Samir Dadda, Bachir Boukhari, Ali Bouali, Belkacem Laboratory of Materials and Reactive Systems Faculty of Technology Djillali Liabes University of Sidi Bel-Abbés Algeria Applied Research Unit for Renewable Energies URAER Renwable Energy Development Center CDER Ghardaïa47133 Algeria Mechanical Engineering Department Faculty of Technology El-Oued University Algeria Process Engineering Laboratory Laghouat University Laghouat Algeria

The chemisorption storage of hydrogen within metal hydride (MH) reactors is considered as the promising method for the successful emergence of hydrogen energy in mobility sector. However, there are two major areas that require attention for this process to be optimized: thermal management and gravimetric storage capacity of MH reactors system. In order to address these challenges, we propose a new cylindrical MH reactor tank design that is filled with 1.58 Kg of LaNi5 powder. To optimize heat and mass transfer during the exothermic hydrogen absorption reaction, we integrate two new heat exchangers containing heat transfer fluid (HTF), which have minor impacts on the reactor volume and weight. The first is a copper-finned heat exchanger, consisting of four rectangular pipes with six stages of circular fins, with occupied ratio of 17.3 % and 14.7 % in total mass and volume of reactor system, respectively. The second is a tubular heat exchanger jacket with a spiral tube on stainless steel SS316, welded to the peripheral wall of the reactor with ratio of 16.3 % and 15.7 % in total mass and volume of reactor. We conducted a three-dimensional numerical study using CFD code of ANSYS FLUENT software to analyse heat and mass transfers during the hydrogen absorption process. The aim of this study is to assess how operational parameters and the geometric design of the two integrated heat exchangers affect the efficiency of solid hydrogen storage, with a focus on identifying optimization possibilities. The results of our simulation procedure were validated with numerical and experimental data published in the literature, showing good agreement. The obtained results indicate that the absorption reaction kinetics exhibit a greater responsiveness to hydrogen injection pressure in comparison to the effect of temperature and the velocity of HTF. Inserting fins through the cooling fluid medium has a dual impact on the heat absorbed by the HTF, increasing its amount and accelerating i

关键词： Fins (heat exchange)

来源：评论

学校读者我要写书评

暂无评论

The effect of graph complexity in an energy-based FDI approach

引用

IFAC-PapersOnLine 2024年第4期58卷 622-627页

作者： Jan H. Smith George van Schoor Kenneth R. Uren Thomas Schäfer School of Electrical Electronic and Computer Engineering Faculty of Engineering North-West University South Africa Unit for Energy and Technology Systems Faculty of Engineering North-West University Institute for Process Technology Process Automation and Measurement Technology Zittau/Görlitz Germanuy

This paper introduces a structured approach for creating node signature graphs in energy graph-based visualization for industrial systems, focusing on anomaly detection. It examines the relationship between graph cardinality and the singular value decomposition analysis applied in the energy graph-based visualization method. The results reveal a trade-of between graph complexity and singular value resolution. The study highlights how graph structure affects energy flow monitoring and anomaly detection. It notably enables fault detection in components not represented as nodes, enhancing the methodology in energy-based system monitoring.

关键词： Fault detection isolation Graph reduction Graph matching Hybrid FDI Industrial process Thermal flow process Graph-based anomaly detection

来源：评论

学校读者我要写书评

暂无评论

Reversible Solid Oxide Cells for energy Storage in the Netherlands: Thermodynamics and Fuel Selection

Reversible Solid Oxide Cells for Energy Storage in the Nethe...

引用

243rd ECS Meeting

作者： Amladi, Amogh Resink, Friso el Tambouli, Omar Venkataraman, Vikrant Woudstra, Theo Aravind, P.V. Energy Conversion Research Group Energy and Sustainability Research Institute Faculty of Science and Engineering University of Groningen Groningen Netherlands Faculty of Science and Engineering University of Groningen Groningen Netherlands Department of Process and Energy Delft University of Technology Delft Netherlands Instrumentation and Test Systems Fuel Cell Business Unit AVL List GmbH Hans List Platz 1 Graz8020 Austria

ISBN: (纸本)9781607685395

We investigated a large-scale energy storage system based on reversible solid oxide cells, for a future Dutch electrical grid powered entirely by intermittent renewables. Three fuels - hydrogen, ammonia and methane - were investigated for such a system, to find the most suitable one in terms of minimizing the required fuel storage and renewable power generation capacity. The required sizes of fuel storage and power generation using each fuel were estimated using process models of rSOC systems, and a mathematical model of a storage-supported power grid. The results show that the use of hydrogen would lead to the smallest power generation requirement. It is found that the potential storage capacity in the Netherlands exceeds the requirement for storing any fuel, while the renewable power capacity planned for 2030 is insufficient to meet the demand. Under these conditions and assumptions, we find hydrogen to be the appropriate fuel for the Netherlands. © The Electrochemical Society.

关键词： Solid oxide fuel cells (SOFC)

来源：评论

学校读者我要写书评

暂无评论

Mixed Matrix Membranes Composed of Graphene-Based Derivatives as Additives in Pvam for Co2 Capture

SSRN

引用

SSRN 2024年

作者： Baker, James Perinu, Cristina Psarrou, Maria Mordal Lucasen, Sigmund Kusuma, Victor Muldoon, Patrick Asimakopoulou, Akrivi Hopkinson, David Economopoulos, Solon P. U.S. Department of Energy National Energy Technology Laboratory 626 Cochrans Mill Rd PittsburghPA15236 United States NETL Support Contractor 626 Cochran Mill Rd PittsburghPA15236 United States Advanced Optoelectronic Nanomaterials Research Unit Department of Chemistry Norwegian University of Science and Technology Trondheim7491 Norway Advanced Renewable Technologies & Environmental Materials in Integrated Systems ARTEMIS Chemical Process and Energy Resources Institute CPERI Centre for Research and Technology Hellas CERTH Thermi Thessaloniki57001 Greece

Graphene-based mixed matrix membranes (MMMs) that employ facilitated transport of carbon dioxide were prepared and tested for use in post-combustion carbon capture. Two novel graphene hybrids were synthesized using exfoliated graphene (G) and GO as a basis and were then appended with triethylene glycol (TEG) and N-(2-Hydroxyethyl)ethylenediamine (EDAOH) functional groups, respectively. Unfunctionalized GO nanoparticles were commercially obtained for comparison to the synthesized nanoparticles. The three additives were tested as nanofillers with loadings of 0.5 wt% and, in one case, 1 wt% in polyvinylamine (PVAm) matrices for CO2 and N2 gas permeability using humidified mixed gas. MMMs using G-TEG filler particles resulted in improved CO2/N2 selectivity, while GO-EDAOH fillers improved both CO2 permeability and CO2/N2 selectivity compared to neat PVAm. Unfunctionalized GO fillers resulted in no significant change in gas transport properties. Mechanical properties were also tested. The addition of GO or GO-EDAOH filler particles resulted in improvements in storage modulus as well as higher glass transition temperature, while G-TEG filler particles yielded a less significant change compared to neat PVAm. © 2024, The Authors. All rights reserved.

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

Exergy-based fault detection on the Tennessee Eastman process

引用

IFAC-PapersOnLine 2020年第2期53卷 13713-13720页

作者： J. Vosloo K.R. Uren G. van Schoor L. Auret H. Marais School of Electrical Electronic and Computer Engineering Faculty of Engineering North-West University South Africa Unit for Energy and Technology Systems Faculty of EngineeringNorth-West University South Africa School of Process Engineering Stellenbosch University South Africa

The exergy-based fault detection method has not yet been applied to a complex industrial system that adequately represents a dynamically changing process. One such system, the Tennessee Eastman process, is commonly used as a benchmark for fault detection methods. In this paper, an exergy-based fault detection approach is applied to the Tennessee Eastman process. This is done to investigate the feasibility of using this approach when confronted with noisy sensor data and control loops masking faulty behaviour. An exergy characterisation was performed on stream data obtained from the Tennessee Eastman process. The exergy characterisation included a new approach to calculate the standard chemical exergy of unknown components. For fault detection, threshold limits were determined for the exergy characterisation when normal operating conditions are assumed. The threshold limits were calculated following the upper and lower control limit determination of the Shewhart control chart. The results showed that this method could quantify both the physical state as well as the chemical features of the process and that 17 out of the 20 considered faults could be detected. This shows that the exergy-based method could be adequately applied to the Tennessee Eastman process.

关键词： Fault detection Exergy Tennessee Eastman process

来源：评论

学校读者我要写书评

暂无评论

Facilitating renewable natural gas production for a circular bioeconomy: AI-Driven process visualization and data augmentation on biochar-mediated anaerobic digestion

引用

Chemical Engineering Journal 2025年 516卷

作者： Xiaoman He Jingyuan Guo Xihui Kang Xue Ning Huichao Chen Daolun Liang Chen Deng Zutan Li Dekui Shen Huiyan Zhang Richen Lin Jerry D. Murphy Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing 211189 China Advanced Biofuels and Bioproducts Process Development Unit Biological Systems and Engineering Division Lawrence Berkeley National Laboratory Emeryville CA 94608 USA School of Engineering and Architecture University College Cork T23XE10 Cork Ireland Research Ireland MaREI Centre for Energy Climate and Marine Environmental Research Institute University College Cork T23XE10 Cork Ireland School of Chemistry and Chemical Engineering Southeast University Nanjing 211189 China School of Engineering Westlake University Hangzhou Zhejiang 310030 China Institute of Advanced Technology Westlake Institute for Advanced Study Hangzhou Zhejiang 310024 China

The conversion of biomass residues into biochar is a promising strategy for enhancing sustainability within the circular bioeconomy, particularly through its role in improving renewable natural gas production. However, engineering biochar with optimal properties remains a complex challenge, as the relationship between preparation conditions, biochar characteristics, and anaerobic digestion (AD) performance is not fully understood. This study presents an AI-derived full-process prediction approach that integrates machine learning and generative models to guide the rational design of biochar, and optimize its use for biomethane production. Three tree-based regression models were employed to predict AD performance, with the eXtreme Gradient Boosting Regression model demonstrating superior accuracy. Feature importance analysis identified key biochar properties, including electrical conductivity, oxygen content, and specific surface area, as critical factors influencing biomethane production. These properties can be fine-tuned by adjusting pyrolysis conditions and selecting suitable biomass sources. A generative adversarial network was further used to explore a broader data space, helping to identify the optimal combination of parameters for maximizing AD efficiency. This novel AI-driven framework facilitates biochar-mediated renewable natural gas production, offering a scalable and sustainable approach for advancing circular bioeconomy.

关键词：

来源：评论

学校读者我要写书评

暂无评论

An energy-attributed graph approach for the purposes of FDI in a heated two-tank system

引用

IFAC-PapersOnLine 2019年第14期52卷 159-164页

作者： Kenneth R. Uren George van Schoor Lidia Auret School of Electrical Electronic and Computer Engineering North-West University Potchefstroom 2531 South-Africa Unit for Energy and Technology Systems North-West University Potchefstroom 2531 South-Africa Department of Process Engineering Stellenbosch University Private Bag X1 Matieland 7602 Stellenbosch South Africa

The focus of this paper is the development of attributed graph representations of industrial processes. In this case energy attributes are used since it serves a data reduction purpose and allows for the consideration of multi-domain systems. Pattern recognition approaches towards FDI are considered advantageous due to their visual interpretation qualities. It is therefore envisaged that these attributed graphs can be used in a new innovative graph matching methodology to be able to detect and isolate faults. A two-tank thermo-fluid system is considered in this paper as a case study. An attributed graph containing exergy and energy flows is derived and from this graph node signature matrices are extracted that represent normal and fault conditions. Fault signatures are compared to the normal signature by deriving a cost matrix using a Heterogenous Eucledian-Overlap Metric (HEOM). Eigenvalues of the cost matrices are analysed in a qualitative way as a first stage of fault detection.

关键词： attributed graphs energy-based exergy flow energy flow fault detection

来源：评论

学校读者我要写书评

暂无评论

Biopesticidal value of Senecio glaucus subsp. coronopifolius essential oil against pathogenic fungi, nematodes, and mites

引用

Materials Today: Proceedings 2020年 27卷 3082-3090页

作者： Khadija Basaid El Hassan Mayad Rachid Bouharroud James Nicholas Furze Hinde Benjlil Alessandra Lopes de Oliveira Bouchra Chebli Laboratory of Mechanic Process Energy and Environment National School of Applied Sciences Ibn Zohr University Agadir Morocco Laboratory of Biotechnology and Valorization of Natural Resources Faculty of Sciences of Agadir Department of Biology Ibn Zohr University BP 8106 80000 Agadir Morocco Research Unit of Integrated Crop Production Centre Regional de la Recherche Agronomique d’ Agadir (INRA) Morocco Fellow of the Control and Systems Engineering Department University of Technology Baghdad Iraq Fellow of the Royal Geographical Society London UK Laboratory of High Pressure Technology and Natural Products Department of Food Engineering University of São Paulo (USP) Av. Duque de Caxias Norte 225 Pirassununga SP 13635-900 Brazil

Essential oils are widely investigated as an alternative or complementary approach to broad-spectrum synthetic pesticides. In the present study, essential oil of Senecio glaucus subsp. coronopifolius was screened for its antifungal, nematicidal, acaricidal and repellent activities against the phytopathogens Botrytis cinerea , Meloidogyne javanica and Tetranychus urticae Koch under laboratory conditions. The volatile phase method (VF) and poisoned food method (PF) were adopted to test the antifungal activity of the essential oil. The oil gave 83% inhibition at 16 μL/ml using the PF method. VF method showed 86% inhibition of mycelial growth of B. cinerea at 0.8 μL/ml air. To check the nematicidal activity of the essential oil, two bioassays targeted the mortality of second stage juvenile (J2) and hatch inhibition of M. javanica eggs. 95% immobility of J2 and 92% inhibition of egg hatch were recorded at 16,000 ppm. The effect exerted by the oil was nematostatic. In the case of mites, a leaf dip bioassay revealed 100% mortality of T. urticae adults, and repellency of 24% after exposure to the oil at 80% concentration. Chemical profile of S. glaucus essential oil was obtained using GC–MS. Terpenic compounds, such as indicated α-pinene (26.2%), myrcene (11.4%), p-cymene (9.9%), β-pinene (7.7%), γ-muurolene (4%), deoxynivalenol (3.1%) and α-phellandrene (2.7%) were identified as the major components. The findings indicated that S. glaucus essential oil has the potential for management of these pathogens.

关键词： Essential oil Senecio glaucus subsp. coronopifolius Botrytis cinerea Meloidogyne javanica Tetranychus urticae Koch

来源：评论

学校读者我要写书评

暂无评论

Optical and structural properties of CZTS thin films produced by electrodeposition

引用

Materials Today: Proceedings 2024年

作者： Mondjou Georges Constant Beh Bouchaib Hartiti Ahmed Ziti Fransisco Kouadio Konan Abdelkrim Batan Hicham Labrim Abdellah Laazizi Cisse Théodore Haba Philippe Thevenin Laboratory of Virology Oncology Biosciences Environment and New Energies (LVOBEEN) and team leader of the Materials Energy Water Modelling and Sustainable Development Group (GMEEM & DD) FSTM Hassan II University of Casablanca (UH2C) BP 146 Mohammedia 20650 Morocco Laboratory of Solar Energy and Nanotechnology (LESN) - IREN (Institute of Research on New Energies) Nangui Abrogoua University 02 BP 801 Abidjan 02 Ivory Coast Joint Research and Innovation Unit in Engineering Science and Technology (UMRI-STI) National Polytechnic Institute Houphouët-Boigny (INP-HB) BP 1093 Yamoussoukro Ivory Coast FST Errachidia Materials Science Team University Moulay Ismail of Meknes BP 509 Boutalamine 52000 Errachidia Morocco dvanced Systems Engineering Laboratory National School of Applied Sciences Ibn Tofaîl University Kenitra Morocco Laboratory of Materials Metallurgy and Process Engineering ENSAM Meknes Morocco MOPS laboratory University of Lorraine Centrale Supelec - 2 rue E. Belin B.P. 57070 Metz France

Copper-zinc-tin sulfide (Cu 2 ZnSnS 4 or CZTS), a quaternary compound, behaves as an intrinsic p-type semiconductor, making it an attractive, cost-effective and environmentally-friendly alternative as an absorber layer in photovoltaic cells. In this study, we deposited CZTS onto ITO conductive glass substrates using a single-step co-electrodeposition technique known as Cu-Zn-Sn-S (Co-Ed). The deposition process occurred at room temperature in an aqueous citrate electrolyte bath containing copper (II), zinc (II), tin (II), and sulfur. The deposition process was assisted by cyclic voltammetry to study the influence of cycle numbers, in particular 5, 10 and 15, on the structural and optical characteristics of sulfidation-free films. Scans were carried out at a rate of 20 mV/s in the potential range from −1.6 to 0 eV. CZTS thin films were characterized using X-ray diffraction (XRD) and UV–visible spectroscopy (UV–vis). The XRD results indicate the formation of CZTS kesterite, as evidenced by characteristic peaks. Likewise, optical analysis reveals an optical gap energy closely aligned with the optimum gap for the CZTS absorber layer (1.5 eV), making it suitable for photovoltaic applications.

关键词： CZTS Co-Ed Cyclic voltammetry UV–visible XRD

来源：评论

学校读者我要写书评

暂无评论

A Benchmark System for Hardware-in-The-Loop Testing of Distributed energy Resources

引用

IEEE Power and energy technology systems Journal 2018年第3期5卷 94-103页

作者： Kotsampopoulos, Panos Lagos, Dimitris Hatziargyriou, Nikos Faruque, M. Omar Lauss, Georg Nzimako, Onyi Forsyth, Paul Steurer, Michael Ponci, F. Monti, A. Dinavahi, V. Strunz, Kai Smart Grids Research Unit School of Electrical and Computer Engineering National Technical University of Athens Zografou15780 Greece Department of Electrical and Computer Engineering Center for Advanced Power Systems Florida State University TallahasseeFL32310 United States Energy Department Austrian Institute of Technology Vienna1210 Austria RTDS Inc. WinnipegMBR3T 2E1 Canada Institute for Automation of Complex Power Systems E.ON Energy Research Center RWTH Aachen University Aachen52074 Germany Department of Electrical and Computer Engineering University of Alberta EdmontonABT6G 2V4 Canada SENSE Lab Berlin University of Technology Berlin10587 Germany

In order to overcome challenges associated with the integration of distributed energy resources (DER) into state-of-The-art and future power grids, a common basis for testing using appropriate benchmark systems is required. Real-time hardware-in-The-loop (HIL) simulation has proven to be an advanced and efficient tool for the analysis and validation of electric power systems and DER components. However, a common methodology for HIL testing of DER along with the required set of reference systems has not yet been developed. This task-force paper proposes a benchmark system for HIL testing incorporating DER into the real-time simulation environment. A low-voltage benchmark system with detailed HIL setup is proposed for the testing of DER performance. The modeling of DER for real-time applications is discussed, and the detailed laboratory procedures and setups for both controller HIL (CHIL) and power HIL (PHIL) are provided. Results from CHIL simulation related to the centralized controls and experimental results of PHIL simulation related to local control on the benchmark system substantiate the suitability of the proposed real-time simulation approach. © 2014 IEEE.

关键词： Hardware-in-the-loop simulation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：