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Energetic and exergetic performance improvement of a solar flat plate collector working with nanofluid

Thermal Science and engineering Progress 2024年

作者： Wajdi Rajhi Rassol H. Rasheed Dheyaa J. jasim Walid Aich Badreddine Ayadi Reza Alayi Department of Mechanical Engineering College of Engineering University of Ha’il Ha’il City 81451 Saudi Arabia Laboratoire de Mécanique Matériaux et Procédés LR99ES05 Ecole Nationale Supérieure d'Ingénieurs de Tunis Université de Tunis 5 Avenue Taha Hussein Montfleury 1008 Tunis Tunisia Air Conditioning Engineering Department Faculty of Engineering Warith Al-Anbiyaa University Iraq Department of Petroleum Engineering Al-Amarah University College Maysan Iraq Laboratory of Meteorology and Energy Systems University of Monastir Monastir 5000 Tunisia Laboratory of Applied Fluid Mechanics Environment and Process Engineering “LR11ES57” National School of Engineers of Sfax (ENIS) University of Sfax Route Soukra Km 3.5 Sfax 3038 Tunisia Department of Mechanics Germi Branch Islamic Azad University Germi *** Iran Energy Research Centre Shahrekord Branch Islamic Azad University Shahrekord 88137-33395 Iran

For maximum heat absorption by solar collectors, the use of a suitable fluid is very important. For this purpose, the energy analysis and maximum exergy use of the fluid are needed. Therefore, in this research, a nanofluid has been used in the flat plate collectors for maximum heat absorption. The effect of using nanofluid (Molybdenum disulfide nanoparticles) in a flat plate collector was evaluated by energy and exergy production. In this regard, a simulation was developed based on mathematical modeling in Ansys Fluent software. In this study, the flat plate collector was modeled while considering environmental parameters. To analyze the performance of the solar collector, two different mass flow rates were considered, and the effects of mass flow rate on different characteristics were investigated. In addition, solar collector evaluation for different nanoparticle shapes (i.e., Spherical, Square Pyramid, Hexagonal Prism, and Pentagonal Prism) was discussed. Based on the obtained results and according to the evaluation criteria of the thermal–hydraulic science in a volume fraction of ϕ = 5 % for a mass flow rate with m ̇ = 1 k g / s , pentagonal prism nanoparticles were deemed the best model among different forms of nanoparticles, and their value was approximately 1.489. The flow with a mass flow rate of 0.75 kg / s upon adding spherical or pentagonal nanoparticles to the base fluid had no effect in terms of improving energy efficiency. Meanwhile, for a flow with a m ̇ = 1 k g / s , we used a volume fraction of 2 % to 5 %.The present study and the observed results can be a suitable guide for improving the performance of flat plate solar collectors based on nanofluids.

关键词： Solar Collector Thermal Hydraulic Performance Evaluation Criteria (PEC) Entropy Production Nanofluid Sustainable Development

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Fine Pore-Structure engineering by Ligand Conformational control of Naphthalene Diimide-Based Semiconducting Porous Coordination Polymers for Efficient Chemiresistive Gas Sensing

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Angewandte Chemie 2022年第2期135卷

作者： Dr. Ziqian Xue Dr. Jia-Jia Zheng Dr. Yusuke Nishiyama Dr. Ming-Shui Yao Dr. Yoshitaka Aoyama Zeyu Fan Dr. Ping Wang Prof. Takashi Kajiwara Prof. Yoshiki Kubota Prof. Satoshi Horike Prof. Ken-ichi Otake Prof. Susumu Kitagawa Institute for Integrated Cell-Material Sciences Kyoto University Institute for Advanced StudyKyoto University Yoshida Ushinomiya-cho Sakyo-ku Kyoto 606-8501 Japan Laboratory of Theoretical and Computational Nanoscience National Center for Nanoscience and Technology of China Beijing 100190 China RIKEN-JEOL Collaboration Center Yokohama Kanagawa 230-0045 Japan JEOL Ltd. Musashino Akishima Tokyo 196-8558 Japan State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Zhongguancun Beiertiao No. 1 Haidian Beijing 100190 China Department of Physics Graduate School of Science Osaka Metropolitan University 599-8531 Osaka Japan

Exploring new porous coordination polymers (PCPs) that have tunable structure and conductivity is attractive but remains challenging. Herein, fine pore structure engineering by ligand conformation control of naphthalene diimide (NDI)-based semiconducting PCPs with π stacking-dependent conductivity tunability is achieved. The π stacking distances and ligand conformation in these isoreticular PCPs were modulated by employing metal centers with different coordination geometries. As a result, three conjugated PCPs (Co−pyNDI, Ni−pyNDI, and Zn−pyNDI) with varying pore structure and conductivity were obtained. Their crystal structures were determined by three-dimensional electron diffraction. The through-space charge transfer and tunable pore structure in these PCPs result in modulated selectivity and sensitivity in gas sensing. Zn−pyNDI can serve as a room-temperature operable chemiresistive sensor selective to acetone.

关键词： PCPs/MOFs NDI Semiconductors Sensors 3D electron diffraction (3D ED)

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Investigation of mechanical behavior of Ag/Cu bilayer using nanoindentation test

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AIP Conference Proceedings 2024年第1期3241卷

作者： Rachid Herbazi Hassane Mes-adi Meryem Taoufiki Amine El Harfouf Khalid Amechnoue Adil Chahboun Intelligent Systems and Applications Laboratory (LSIA) EMSI Tangier Morocco Laboratory of Process Engineering Computer Science and Mathematics National School of Applied Sciences of Khouribga Sultan Moulay Slimane University Beni-Mellal Morocco Sustainable Development Laboratory Faculty of Science and Technology of Beni-Mellal Sultan Moulay Slimane University Beni-Mellal Morocco Multidisciplinary Laboratory of Research and Innovation (LaMRI) Energy Materials Atomic and Information Fusion (EMAFI) Team Polydisciplinary Faculty of Khouribga Sultan Moulay Slimane University Beni-Mellal Morocco. ERMIA National School of Applied Sciences Abdelmalek Essaadi University Tangier Morocco. ERCMN Faculty of Sciences and Technology Abdelmalek Essaadi University Tangier Morocco.

In this paper, we employed molecular dynamics (MD) simulations to model the nanoindentation process, aiming to explore the mechanical characteristics of a silver (Ag) coating film on a copper (Cu) substrate. Three distinct bilayer configurations were selected, namely Ag (100)/Cu (111), Ag (110)/Cu (111), and Ag (111)/Cu (111), with the purpose of examining the impact of heterogeneous interfaces on deformation behaviors during nanoindentation. The results demonstrate that the Ag (111)/Cu (111) bilayer exhibits a higher force during the nanoindentation process when compared to the Ag (100)/Cu (111) and Ag (110)/Cu (111) bilayers. This suggests that interfaces with a smaller mismatch in the specified crystal plane between Ag and Cu are proven to be harder. To studied the correlation between indentation velocity and the interface, we considered various values of indentation velocities ranging from 120 m/s to 200 m/s, conducting indentations on the Ag (111)/Cu (111) bilayer. The findings indicate that variations in indentation velocity significantly impact the mechanical properties of Ag (111)/Cu (111) bilayers. Both force and hardness values exhibit a significant increase as indentation velocity rises, implying that the strength of Ag/Cu bilayers is more pronounced at higher indentation velocities. These observed trends were attributed to defect and dislocation formation at the interface, as confirmed through dislocation extraction analysis (DXA).

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2D co-catalytic MoS2 nanosheets embedded with 1D TiO2 nanoparticles for enhancing photocatalytic activity

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Journal of Physics D: Applied Physics 2016年第31期49卷

作者： Xiaohui Ren Xiang Qi Yongzhen Shen Si Xiao Guanghua Xu Zhen Zhang Zongyu Huang Jianxin Zhong Hunan Key Laboratory of Micro-Nano Energy Materials and Devices Xiangtan University Hunan 411105 People's Republic of China Laboratory for Quantum Engineering and Micro-Nano Energy Technology and School of Physics and Optoelectronic Xiangtan University Hunan 411105 People's Republic of China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen University Shenzhen 518060 People's Republic of China School of Physics and Optoelectronics Xiangtan University Hunan 411105 People's Republic of China. Institute of Super-microstructure and Ultrafast Process in Advanced Materials School of Physics and Electronics Central South University 932 South Lushan Road Changsha Hunan 410083 People's Republic of China

2D photocatalytic TiO2/MoS2 hybrid nanosheets (HNs) have been prepared via a facile hydrothermal process. X-ray diffraction patterns and Raman spectra are carried out and confirm a well crystalized anatase and 2H-MoS2 hybridization. Additional morphological and microstructural tests verify a distinct MoS2 framework, indicating the relatively stability of the MoS2 nanosheet platform with a high specific surface area. UV–vis spectra and electrochemical impedance spectra exhibit an enhanced light absorption ability and conductivity of TiO2/MoS2 compared to that of just TiO2. Photoelectrochemical (PEC) tests also demonstrate the photocurrent of 20 : 1 TiO2/MoS2 HNs is greatly improved compared to that of as-prepared TiO2. The saturation current density is about 33 µA cm−2 when the applied potential is 0.2 V, which is nearly twice that of pure TiO2 and four times as high as 5 : 1 TiO2/MoS2 HNs and 1 : 1 TiO2/MoS2 HNs. Besides that, the duration test exhibits no detectable distinction after processing 25 cycles. The improved photocatalytic activities are perhaps derived from the high conductivity and the increased active sites for the introduction of co-catalytic MoS2 nanosheets as well as the positive synergetic effect between the TiO2 and MoS2. This work demonstrates that the as-prepared TiO2/MoS2 HNs may have a great potential application in PEC hydrogen production.

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Adsorption and Self‐Assembly of Peptides on Mica Substrates†

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Angewandte Chemie 2005年第13期117卷

作者： Conor Whitehouse Jiyu Fang Amalia Aggeli Mark Bell Rik Brydson Colin W. G. Fishwick Jim R. Henderson Charles M. Knobler Robert W. Owens Neil H. Thomson D. Alastair Smith Neville Boden Centre for Self‐Organising Molecular Systems Department of Chemistry University of Leeds Leeds LS2 9JT UK Fax: (+44) 113‐343‐6452 Present address: Research and Development Division Fujirebio Inc. 51 Komiya‐cho Hachioji‐shi Tokyo 192‐0031 Japan Fax: (+81) 426‐468‐325 Department of Chemistry and Biochemistry University of California Los Angeles CA 90095‐1569 USA Institute for Materials Research School of Process Environmental and Materials Engineering University of Leeds Leeds LS2 9JT UK Department of Physics and Astronomy University of Leeds Leeds LS2 9JT UK

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Thin-Film Transistors: ZnO Nanofiber Thin-Film Transistors with Low-Operating Voltages (Adv. Electron. Mater. 1/2018)

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Advanced Electronic Materials 2018年第1期4卷

作者： Fengyun Wang Longfei Song Hongchao Zhang You Meng Linqu Luo Yan Xi Lei Liu Ning Han Zaixing Yang Jie Tang Fukai Shan Johnny C. Ho College of Physics and Cultivation Base for State Key Laboratory Qingdao University Qingdao 266071 P. R. China School of Microelectronics and Center of Nanoelectronics Shandong University Jinan 250100 P. R. China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China College of Electronic and Information Engineering Qingdao University Qingdao 266071 China Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong S.A.R. 999077 China State Key Laboratory of Millimeter Waves City University of Hong Kong Kowloon Hong Kong S.A.R. 999077 China Shenzhen Research Institute City University of Hong Kong Shenzhen 518057 P. R. China

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COVID‐19 Vaccines: Particulate Alum via Pickering Emulsion for an Enhanced COVID‐19 Vaccine Adjuvant (Adv. Mater. 40/2020)

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Advanced Materials 2020年第40期32卷

作者： Sha Peng Fengqiang Cao Yufei Xia Xiao‐Dong Gao Lianpan Dai Jinghua Yan Guanghui Ma State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of Education School of Biotechnology Jiangnan University Wuxi Jiangsu 214122 P. R. China Graduate School of Bio‐Applications and Systems Engineering Tokyo University of Agriculture and Technology 2‐24‐16 Nakacho Koganei Tokyo 184‐8588 Japan University of Chinese Academy of Sciences Beijing 100049 P. R. China Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing 100190 P. R. China Beijing Institute of Life Science Chinese Academy of Sciences Beijing 100101 P. R. China Institute of Microbiology Chinese Academy of Sciences Beijing 100101 P. R. China

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Kinetic scheme of the synthesis of butadiene rubber on a modified lithium catalytic system taking into account its polycentricity

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Journal of Physics: Conference Series 2021年第5期2094卷

作者： E V Garifullina V V Bronskaya G A Aminova G V Manuyko O S Kharitonova T V Ignashina D S Balzamov Department of Inorganic Chemistry named after Professor N.S. Akhmetov Kazan National Research Technological University 68 Karl Marx Street Kazan 420015 Russian Federation Department of Chemical Process Engineering Kazan National Research Technological University 68 Karl Marx Street Kazan 420015 Russian Federation Department of Information Systems Kazan Federal University 35 Kremlyovskaya Street Kazan 420008 Russian Federation Department of Technology of Engineering Materials Kazan National Research Technological University 68 Karl Marx Street Kazan 420015 Russian Federation Department of Chemical Technology of Petroleum and Gas Processing Kazan National Research Technological University 68 Karl Marx Street Kazan 420015 Russian Federation Department of Power Supply of Enterprises and Energy Resource Saving Technologies Kazan State Power Engineering University 51 Krasnoselskaya Street Kazan 420066 Russian Federation

A mathematical simulation of the synthesis of butadiene rubber in a batch reactor under the action of an organolithium catalytic system in the presence of a modifier and with the addition of toluene to a solvent is carried out. A kinetic scheme of the process is proposed and the velocity constants of the elementary stages are determined on the basis of the developed model.

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Pilot scale manufacturing of black seed oil-loaded alginate beads;process development, and stability of thymoquinone

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Heliyon 2024年第19期10卷 e37630页

作者： Alkhatib, Hamzeh Mohamed, Farahidah Alfatama, Mulham Assadpour, Elham Kharazmi, Mohammad Saeed Mahdi Jafari, Seid Islam Sarker, Md Zaidul Kumar Sadasivuni, Kishor Mohmad Sabere, Awis Sukarni Doolaanea, Abd Almonem Department of Pharmaceutical Technology Faculty of Pharmacy University College of MAIWP International (UCMI) Kuala Lumpur 68100 Malaysia Department of Pharmaceutical Technology Kulliyyah of Pharmacy International Islamic University Malaysia Pahang Kuantan 25200 Malaysia Faculty of Pharmacy Universiti Sultan Zainal Abidin Besut Campus Kuala Terengganu 22200 Malaysia Food Industry Research Co. Gorgan Iran Food and Bio-Nanotech International Research Center (Fabiano) Gorgan University of Agricultural Sciences and Natural Resources Gorgan Iran Faculty of Medicine University of California Riverside United States Department of Food Materials and Process Design Engineering Gorgan University of Agricultural Sciences and Natural Resources Gorgan Iran Halal Research Center of IRI Iran Food and Drug Administration Ministry of Health and Medical Education Tehran Iran Cooperative Research Extension & Education Services (CEES) Northern Marianas College P.O. Box 501250 Saipan 96950 MP United States Center for Advanced Materials Qatar University P. O. Box 2713 Doha Qatar Department of Pharmaceutical Chemistry Kulliyyah of Pharmacy International Islamic University Malaysia Pahang Kuantan 25200 Malaysia Sabrena Experience 1500 Dragon Street Suite 160 Dallas 75207 TX United States Alphastar Lab Systems Caddo Mills TX United States

The approach of ionic gelation was employed at the pilot scale of the 50 kg batch size to manufacture black seed oil (BSO)-loaded alginate (ALG) beads as a natural source supplementing the main bioactive compound of BSO, i.e., thymoquinone (TQ). The BSO-ALG emulsion was prepared by initially emulsifying BSO with alginate solution at the pilot scale in two stages. The final emulsion was then dripped through 12 units of 3D-printed multi-nozzles into a curing bath containing Ca²⁺. The dripping flow rate was scaled up to 288 mL/min through the 3D-printed multi-nozzles (22-gauge). The characteristics of pilot scale BSO-ALG beads were similar to those produced at the lab scale;the beads were spherical with a size of 1.84–1.94 mm. The mechanical strength and loss on drying ranged from 143.6 to 172 g and 77.85–81.96 %, respectively. The production yield and encapsulation efficiency were 77.53–83.65 % and 95.36–97.9 %, respectively. Furthermore, the emulsification process did not affect TQ stability, while the curing process reduced TQ concentration from 1.51 % to 1.03 % w/w. Additionally, a substantial drop in TQ concentration in the encapsulated BSO was observed after the drying process, where it reached 0.23 % w/w. Finally, the stability of BSO-ALG beads in both wet and dried forms under real-time and accelerated conditions for 3 months revealed that beads were stable in terms of their organoleptic characteristics, size and sphericity, and loss on drying. Findings from this study enable the large-scale manufacturing of encapsulated BSO and similar bioactive compounds in ALG beads for the first time. These findings are valuable for advancing microencapsulation through ionic gelation and enhancing food preservation and safety. © 2024 The Authors

关键词： Alginate beads Black seed oil Ionic gelation Scale-up Stability Thymoquinone

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Impact of the Chlorination of Lithium Argyrodites on the Electrolyte/Cathode Interface in Solid-State Batteries

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Angewandte Chemie 2022年第7期135卷

作者： Dr. Tong-Tong Zuo Dr. Felix Walther Jun Hao Teo Dr. Raffael Rueß Yubo Wang Prof. Marcus Rohnke Prof. Daniel Schröder Prof. Linda F. Nazar Prof. Jürgen Janek Institute of Physical Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany Center for Materials Research (ZfM/LaMa) Justus Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany Battery and Electrochemistry Laboratory Institute of Nanotechnology Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Department of Chemistry and the Waterloo Institute for Nanotechnology University of Waterloo 200 University Avenue West Waterloo Ontario N2L 3G1 Canada Institute of Energy and Process Systems Engineering (InES) Technische Universität Braunschweig Langer Kamp 19B 38106 Braunschweig Germany

Lithium argyrodite-type electrolytes are regarded as promising electrolytes due to their high ionic conductivity and good processability. Chemical modifications to increase ionic conductivity have already been demonstrated, but the influence of these modifications on interfacial stability remains so far unknown. In this work, we study Li 6 PS 5 Cl and Li 5.5 PS 4.5 Cl 1.5 to investigate the influence of halogenation on the electrochemical decomposition of the solid electrolyte and the chemical degradation mechanism at the cathode interface in depth. Electrochemical measurements, gas analysis and time-of-flight secondary ion mass spectrometry indicate that the Li 5.5 PS 4.5 Cl 1.5 shows pronounced electrochemical decomposition at lower potentials. The chemical reaction at higher voltages leads to more gaseous degradation products, but a lower fraction of solid oxygenated phosphorous and sulfur species. This in turn leads to a decreased interfacial resistance and thus a higher cell performance.

关键词： Composite Cathode Interfacial Stability Lithium Argyrodite Electrolyte Solid State Battery

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