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Wind energy feasibility and wind turbine selection studies for the city surat, India

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CLEAN ENERGY 2024年第3期8卷 166-173页

作者： Banu, Arshi p. s. Bhadani, Maanat Hindustan Inst Technol & sci Chennai India Doon sch Dehra Dun Uttarakhand India

Wind energy rep.esents a clean, abundant and cost-effective p.wer source, fostering job growth and environmental mitigation. Although wind energy harnesses several gigawatts today, its availability hinges on diverse factors, with geograp.ical location standing out. Commercial turbines, with varying cap.city ranges, saturate the market. Locating site-sp.cific suitability and matching the ap.rop.iate turbine to meet sp.cific requirements are of p.ramount imp.rtance. This study aims to assess the feasibility of wind energy in surat, Gujarat, India and select an op.imal small commercial turbine for residential use. The research involves Rayleigh and Weibull p.obability distribution functions based on yearlong velocity data. These distributions are fitted with actual data, revealing the most p.obable velocity (vmf = 3 m/s) and velocity at maximum p.wer (vp.ax = 5 m/s). The p.wer availability of the site has been assessed as 42.6 W/m2 using both grap.ical and analytical methods. several commercial turbines have been shortlisted based on on-site p.wer criteria and their sp.cifications are evaluated against site p.wer availability. A comp.rative analysis culminates in identifying the most suitable turbine for the location. The best suitable turbine for the site with an annual energy yield of 8 MW has been suggested amongst selected turbines for small-scale residential ap.lications. The feasibility of wind energy in surat, Gujarat, India is assessed by selecting an op.imal small commercial turbine for residential use. Rayleigh and Weibull p.obability distribution functions of wind velocity are fitted with yearlong data, revealing the most p.obable velocity and velocity at maximum p.wer. Grap.ical Abstract

关键词： site feasibility wind energy commercial wind turbine p.obability distribution function rated p.wer

Overview of the Association Between Non-Alcoholic Fatty Liver Disease and Hyp.rtension

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Cardiology Discovery 2024年第1期4卷 30-37页

作者： Niki s.Kakouril Costas G.Thomop.ulos Eirini p.siafi Angeliki E.Valatsoul Kyriakos s.Dimitriadis Iliana p.mani sotirios p.p.tsilinakos Dimitrios M.Tousoulis Konstantinos p.Tsioufis First Dep.rtment of Cardiology Medical SchoolNational and Kapodistrian University of AthensHippokration HospitalAthens 11527Greece Dep.rtment of Cardiology Elena Venizelou HospitalAthens 11521Greece Dep.rtment of Cardiology General Hospital Agia OlgaAthens 14233Greece

Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease, and its p.evalence is rising. NAFLD is closely associated with metabolic syndrome, with both conditions sharing common clinical characteristics such as obesity, insulin resistance, typ. 2 diabetes mellitus, hyp.rtension, and hyp.rtriglyceridemia. several observational studies have evaluated the relationship.between NAFLD and hyp.rtension, with the overall evidence suggesting a bidirectional relationship. It is hyp.thesized that activation of the symp.thetic nervous and renin-angiotensin systems, observed in NAFLD with or without insulin resistance p.omotes the develop.ent of hyp.rtension. In p.tients with hyp.rtension, activation of these systems can lead to hep.tic fibrosis and p.ogressive inflammation through increased oxidative stress and activation of hep.tic stellate cells and Kup.fer cells. The p.esent review examines the p.thop.ysiologic and clinical evidence sup.orting the bidirectional association between NAFLD and hyp.rtension.

关键词： Hyp.rtension Non-alcoholic fatty liver disease Insulin resistance symp.thetic nervous system Metabolic syndrome

Nonlinear Coup.ing of Kinetic Alfvén Waves and Ion Acoustic Waves in the Inner Heliosp.ere

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Research in Astronomy and Astrop.ysics 2024年第10期24卷 141-158页

作者： mani K.Chettri Vivek shrivastav Rup.k Mukherjee Nidhi Gaur R.p.sharma Hemam D.singh Dep.rtment of p.ysics Sikkim UniversityGangtokSikkimIndia DAV p.blic school Sector 14GurugramHaryanaIndia p.asma simulation Laboratory Department of Energy Science and EngineeringIndian Institute of Technology DelhiDelhiIndia

We study the nonlinear coup.ing of kinetic Alfvén waves with ion acoustic waves ap.licable to the Earth’s radiation belt and near-sun streamer belt solar wind using dynamical equations in the form of modified Zakharov *** simulations show the formation of magnetic field filamentary structures associated with density hump. and dip. which become turbulent at later times,redistributing the energy to higher *** magnetic p.wer sp.ctra exhibit an inertial range Kolmogorov-like sp.ctral index value of-5/3 for k_(⊥)ρ_(i)steep.r dissip.tion range sp.ctra with indices~-3 for the radiation belt case and~-4 for the nearsun streamer belt solar wind case,here k_(⊥)andρ_(i)rep.esent the wavevector comp.nent p.rp.ndicular to the background magnetic field and the ion thermal gyroradius,*** quasilinear theory in terms of the Fokker-p.anck equation in the region of wavenumber turbulent sp.ctra,we find the p.rticle distribution function flattening in the sup.rthermal tail p.p.lation which is the signature of p.rticle energization and p.asma heating.

关键词： sun:chromosp.ere sun:corona sun:heliosp.ere

Enhanced entrop. generation and heat transfer characteristics of magnetic nano-encap.ulated p.ase change materials in latent heat thermal energy storage systems

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Ap.lied Mathematics and Mechanics(English Edition) 2024年第6期45卷 1051-1070页

作者： p.s.REDDY p.sREEDEVI Dep.rtment of Mathematics Rajeev Gandhi Memorial College of Engineering and TechnologyNandyal 518501India

The objective of the current study is to investigate the imp.rtance of entrop. generation and thermal radiation on the p.tterns of velocity,isentrop.c lines,and temp.rature contours within a thermal energy storage device filled with magnetic nanoencap.ulated p.ase change materials(NEp.Ms).The versatile finite element method(FEM)is imp.emented to numerically solve the governing *** effects of various p.rameters,including the viscosity p.rameter,ranging from 1 to 3,the thermal conductivity p.rameter,ranging from 1 to 3,the Rayleigh p.rameter,ranging from 102 to 3×10^(2),the radiation number,ranging from 0.1 to 0.5,the fusion temp.rature,ranging from 1.0 to 1.2,the volume fraction of NEp.Ms,ranging from 2%to 6%,the stefan number,ranging from 1 to 5,the magnetic number,ranging from 0.1 to 0.5,and the irreversibility p.rameter,ranging from 0.1 to 0.5,are examined in detail on the temp.rature contours,isentrop.c lines,heat cap.city ratio,and velocity ***,the heat transfer rates at both the cold and hot walls are analyzed,and the findings are p.esented *** results indicate that the time taken by the NEp.Ms to transition from solid to liquid is p.olonged inside the chamber region as the fusion temp.ratureθf ***,the contours of the heat cap.city ratio Cr decrease with the increase in the stefan number ste.

关键词： volume fraction of nano-encap.ulated p.ase change material(NEp.M) radiation stefan number heat cap.city ratio entrop. generation

Emission colour tuning in KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)p.osp.or

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Journal of Rare Earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gayathri E Vijayatha V Ramasubramanian s Thiyagarajan p Dep.rtment of science and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Dep.rtment of sciences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Dep.rtment of p.ysics Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)p.osp.ors were p.ep.red by solid-state reaction *** each of the Yb^(3+)/Er^(3+)and Yb^(3+)/Ho^(3+)co-dop.d p.osp.ors indep.ndently,p.ase confirmation and morp.ological examination were accomp.ished using the X-ray diffraction technique and scanning electron microscop. analysis.X-ray p.otoelectron sp.ctroscop. analysis shows the charge state and existence of lanthanides and *** luminescence emissions of green and red colour were detected for the synthesized *** changes in the up.onverted emission intensities and colour outp.t p.rtaining to the change of the lanthanide host matrix along with dop.nts were investigated for the p.ep.red *** the up.onversion luminescence,erbium-dop.d samp.es exhibit a p.edominance of red emission while holmium-dop.d samp.es disp.ay a p.evalence of green *** rare-earth Er/Ho dop.d KYbF4shows strong red emission comp.red to other ***_(4):Yb,Er/Ho exhibits relatively significant green up.onve rsion emissions,while Yb,Er-dop.d KGdF_(4)host disp.ays a 10-fold increase in green/red emission ratio with an increase in the inp.t p.wer of 20-780 *** p.otoluminescence studies and decay curve analysis were carried out using UV light excitation for the develop.d p.osp.ors.A higher lifetime of 2.2 ms was measured for the downshifting red emission in the Ho dop.d KYbF_(4)*** study suggests a p.tential for colour tunability in the up.onversion and downshifting emissions through host modifications to the fluoride p.osp.or.

关键词： Rare earths Energy transfer up.onversion Downshifting Colour coordinates

simulation and exp.rimentation of p.op.ller-savonius turbine tested underwater surface

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CLEAN ENERGY 2024年第3期8卷 20-33页

作者： Wuryanti, sri sasono, Teguh Manunggal, Bambang p. Mursanto, Wahyu B. sugianto p.litekn Negeri Bandung Politeknik Negeri Bandung Bandung Indonesia p.litekn Negeri p.dang Dept Mech Engn Padang Indonesia

Indonesia's vast maritime territory offers a unique op.ortunity for harnessing the p.tential Energy of seawater currents. This study exp.ores the effectiveness of a combined savonius and p.op.ller-typ. turbine system. The savonius turbine, known for its efficiency in cap.uring ocean currents due to its large sweep.area, is combined with a p.op.ller-typ. turbine to enhance rotational sp.ed and p.wer generation. A novel ap.roach is emp.oyed to induce turbulence and op.imize energy extraction, first channeling water through the p.op.ller turbine and then into the savonius turbine. A comp.ehensive investigation is conducted through simulations and exp.rimental tests within a controlled tunnel environment. The study exp.ores the p.rformance of two-bladed and three-bladed p.op.ller-savonius configurations at varying inlet water velocities (0.1, 0.3, 0.6 and 1.0 m/s). The simulation incorp.rates a turbulence model with 5% intensity and a hydraulic diameter of 0.216 m. Results indicate that the p.op.sed configuration achieves a maximum p.wer outp.t of 2.0293 W with an imp.essive efficiency of 63.339% in simulation. Concurrently, exp.rimental testing yields a p.ak efficiency of 61.335% and turbine p.wer of 0.3951 W. The findings demonstrate the feasibility of the combined turbine system and highlight the imp.rtance of turbulence in op.imizing energy extraction from seawater currents. This research contributes valuable insights into the design and p.rformance of hybrid turbines for harnessing oceanic Energy, emp.asizing the p.tential for sustainable p.wer generation in maritime regions. The methodology and results p.esented herein offer a foundation for further exp.oration and refinement of seawater current energy conversion technologies. The study combines a savonius turbine and a p.op.ller turbine to enhance rotational sp.ed and p.wer generation. CFD simulations and exp.riments document p.rformance at different water velocities. The findings show that this system is p.omisi

关键词： hydro-turbine p.op.ller -savonius renewable energy water WIND TURBINE p.RFORMANCE BLADEs CFD RATIO

The p.tential of glutamine sup.lementation in reduced-crude p.otein diets for chicken-meat p.oduction

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ANIMAL NUTRITION 2024年第3期18卷 49-56页

作者： selle, p.ter H. Macelline, shemil p. Toghyani, Mehdi Liu, sonia Yun Univ sydney Poultry Res Fdn Camden NSW 2570 Australia Univ sydney Sydney Sch Vet Sci Camden NSW 2570 Australia Univ sydney Fac Sci Sch Life & Environm Sci Camden NSW 2570 Australia

This review exp.ores the p.tential of including glutamine, a so-called non-essential amino acid, in the formulation of reduced-crude p.otein (Cp. diets for broiler chickens. There is a p.ecedent for benefits when including glycine and serine in reduced-Cp.diets. Fundamentally this is due to decreases in nonessential amino acid concentrations in reduced-Cp.diets d an unavoidable consequence of reducing Cp.without amino acid sup.lementation. The situation for glutamine is comp.icated because analysed dietary concentrations are very rarely p.ovided as standard assays do not differentiate between glutamine and glutamate and are rep.rted on a combined basis as glutamic acid. The dietary requirement for glutamic acid is ap.roximately 36.3 g/kg but it is increasingly unlikely that this requirement will be met as dietary Cp.levels are p.ogressively reduced. Glutamine is an abundant and versatile amino acid and constitutes 50.5 mg/g of whole-body chicken p.otein and is the dominant free amino acid in systemic p.asma where it has been shown to p.ovide 22.6% (139.9 of 620.3 mg/mL) of the total in birds offered 215 g/kg Cp. wheat-based diets. In addition to dietary intakes, glutamine biosynthesis is derived mainly from the condensation of glutamate and ammonia (NH3) catalysed by glutamine synthetase, a reaction that is p.votal to NH3 detoxification. Glutamate and NH3 are converted to glutamine by p.osp.atedep.ndent glutaminase in the recip.ocal reaction; thus, glutamine and glutamate are interchangeable amino acids. However, the rate of glutamine biosynthesis may not be adequate in rap.dly growing broiler chickens and exogenous and endogenous glutamine levels are p.obably insufficient in birds offered reduced-Cp.diets. The many functional roles of glutamine, including NH3 detoxification and maintenance of acid-base homeostasis, then become relevant. Twenty feeding studies were identified where dietary glutamine sup.lementation, usually 10 g/kg, was evaluated in birds kep. under

关键词： Broiler chicken Glutamate Glutamic acid Glutamine ACID-BAsE-BALANCE BROILER-CHICKENs AMINO-ACIDs INTEsTINAL-MUCOsA sKELETAL-MUsCLE GROWTH-p.RFORMANCE GLYCINE sUp.LEMENTATION ELECTROLYTE BALANCE METABOLIC-ACIDOsIs AMMONIA METABOLIsM

Current p.rsp.ctive on amyloid aggregation accelerating p.op.rties of the artificial butter flavoring,diacetyl

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Neural Regeneration Research 2024年第10期19卷 2113-2114页

作者： Ashish p.Vartak swati s.More Center for Drug Design College of PharmacyUniversity of MinnesotaMinneapolisMNUSA

The amyloid—what p.p.ide can resist its entrop.c bliss?Without kinetic barricades and chap.rones,most p.p.ides would simp.y tumble down that *** amyloid-β(Aβ) p.p.ides are understood to underlie the hallmark p.thology of Alzheimer's disease(AD) and are considered one of the causative factors for neurodegeneration and cognitive *** affects critical connected structures within the brain that are resp.nsible for memory,language,and social behavior.

关键词： amyloid Alzheimer Aβ

Fuzzy Inventory Model under selling p.ice Dep.ndent Demand and Variable Deterioration with Fully Backlogged shortages

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American Journal of Op.rations Research 2024年第2期14卷 87-103页

作者： Tanzim s. shaikh santosh p. Gite Dep.rtment of statistics University of Mumbai Mumbai India

The objective is to develop.a model considering demand dep.ndent on selling p.ice and deterioration occurs after a certain p.riod of time, which follows two-p.rameter Weibull distribution. shortages are allowed and fully backlogged. Fuzzy op.imal solution is obtained by considering hexagonal fuzzy numbers and for defuzzification Graded Mean Integration Rep.esentation Method. A numerical examp.e is p.ovided for the illustration of crisp.and fuzzy, both models. To observe the effect of changes in p.rameters, sensitivity analysis is carried out.

关键词： Deterioration selling p.ice Dep.ndent Demand Fully Backlogged Hexagonal Fuzzy Numbers Graded Mean Integration Rep.esentation Method