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Prediction of Residential Building’s Solar Installation Energy Demand in Morocco Using Multiple Linear Regression Analysis

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Energy Engineering 2022年第5期119卷 2135-2148页

作者： Nada Yamoul latifa Dlimi Baraka Achraf Chakir Department of Physics Faculty of SciencesIbn Tofail UniversityKenitra City14000Morocco Department of Mathematics Faculty of SciencesIbn Tofail UniversityKenitra City14000Morocco

The building sector is one of the main energy-consuming sectors in *** fact,it accounts for 33%of the final consumption of energy and records a high increase in the annual consumption of energy caused by further planned large-scale ***,the energy consumption of the building sector is experiencing a significant acceleration justified by the rapid need for the development of housing stock,wich is estimated at an average increase of 1,5%per year;furthermore,tant is an estimated increase of about 6,4%.In this sense,building constitutes an important potential source for rationalizing both energy consumption and energy savings through the adoption of energy efficiency *** consumption control efforts in the residential building sector involve socio-economic,technological,and environmental concerns that require sophisticated ***,different types of quantitative models have been developed and examined so as to find a solution for the optimizing energy *** this work,we have highlighted the importance of using solar heaters to reduce energy demand in terms of the use of domestic hot *** do this,we have defined the needs and characteristics of a solar installation of a residential building located in Casablanca through a calculating tool“SOLO 2000”in addition to the use of multiple linear regression analysis to deduct the impact of irradiation and solar contributions on the energy demand of the solar installation.

关键词： Residential sector energy simulation prediction models black box solar energy

On numerical modeling of low-head direct chill ingot caster for magnesium alloy AZ31

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Journal of Magnesium and Alloys 2014年第4期2卷 275-286页

作者： Mainul Hasan latifa Begum Department of Mining&Materials Engineering McGill UniversityM.H.Wong Building3610 University StreetMontrealQC H3A 0C5Canada

A comprehensive 3D turbulent CFD study has been carried out to simulate a Low-Head(LH)vertical Direct Chill(DC)rolling ingot caster for the common magnesium alloy *** model used in this study takes into account the coupled laminar/turbulent melt flow and solidification aspects of the process and is based on the control-volume finite-difference *** the aluminum/magnesium DC casting industrial practices,the LH mold is taken as 30 mm with a hot top of 60 *** previously verified in-house code has been modified to model the present casting *** quantitative results are obtained for four casting speeds,for three inlet melt pouring temperatures(superheats)and for three metal-mold contact heat transfer coefficients for the steady state operational phase of the *** variable cooling water temperatures reported by the industry are considered for the primary and secondary cooling zones during the ***,the temperature and velocity fields,sump depth and sump profiles,mushy region thickness,solid shell thickness at the exit of the mold and axial temperature profiles at the center and at three strategic locations at the surface of the slab are presented and discussed.

关键词： Low-head DC caster Magnesium alloy AZ31 3D CFD modeling Turbulent melt flow Solidification Mushy region thickness Sump profile

TiO_2 nanotubes as solid-phase extraction adsorbent for the determination of polycyclic aromatic hydrocarbons in environmental water samples

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Journal of Environmental Sciences 2011年第5期23卷 860-867页

作者： Bochra Bejaoui Kefi latifa Latrous El Atrache Hafedh Kochkar Abdelhamid Ghorbel Laboratoire des Matériaux Utiles Institut National de Recherche et d'Analyse Physico-chimiqueple technologique Sidi-Thabet 2020 Tunis Tunisia Laboratoire de Chimie Analytique et Electrochimie Département de Chimie Facultédes Sciences de TunisCampus Universitaire2092 EL Manar TunisTunisia Laboratoire de Chimie des Matériaux et Catalyse Facultédes Sciences de TunisCampus Universitaire2092 EL Manar Tunis Tunisia

An analytical method based on TiO2 nanotubes solid-phase extraction （SPE） combined with gas chromatography （GC） was established for the analysis of seven polycyclic aromatic hydrocarbons （PAHs）： acenaphtylene, acenaphthene, anthracene, fluorene, phenanthrene, fluoranthene and pyrene. Factors affecting the extraction efficiency including the eluent type and its volume, adsorbent amount, sample volume, sample pH and sample flow rate were optimized. The characteristic data of analytical performance were determined to investigate the sensitivity and precision of the method. Under the optimized extraction conditions, the method showed good linearity in the range of 0.01-0.8 μg/mL, repeatability of the extraction （RSD were between 6.7% and 13.5%, n = 5） and satisfactory detection limits （0.017-0.059 μg/mL）. The developed method was successfully applied to the analysis of surface water （tap, river and dam） samples. The recoveries of PAHs spiked in environmental water samples ranged from 90% to 100%. All the results indicated the potential application of titanate nanotubes as solid-phase extraction adsorbents to pre-treat water samples.

关键词： Ti02 nanotubes hydrothermal treatment solid phase extraction gas chromatography polycyclic aromatic hydrocarbons

Semi-continuous casting of magnesium alloy AZ91 using a filtered melt delivery system

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Journal of Magnesium and Alloys 2015年第4期3卷 283-301页

作者： Mainul Hasan latifa Begum Department of Mining&Materials Engineering McGill UniversityM.H.Wong Building3610 University StreetMontrealQC H3A 0C5Canada

A 3-D numerical simulation of an industrial-sized slab caster for magnesium alloy AZ91 has been carried out for the steady state operational phase of the *** simulated model consists of an open-top melt delivery system fitted with a porous filter near the *** melt flow through the porous filter was modeled on the basis of Brinkmann-Forchimier-Extended non-Darcy model for turbulent *** in-house 3-D CFD code was modified to account for the melt flow through the porous *** are obtained for four casting speeds namely,40,60,80,and 100 mm/*** metal-mold contact region as well as the convective heat transfer coefficient at the mold wall were also *** addition to the above,the Darcy number for the porous media was also *** parametric studies were performed for a fixed inlet melt superheat of 64℃.The results are presented pictorially in the form of temperature and velocity *** sump depth,mushy region thickness,solid shell thickness at the exit of the mold and axial temperature profiles are also presented and correlated with the casting speed through regression analysis.©2015 Production and hosting by Elsevier *** behalf of Chongqing University.

关键词： Magnesium alloy AZ91 VDC casting Slab caster 3D CFD modeling Porous filter Non-Darcy model Turbulent melt flow Solidification Mushy region

Impacts of Heat Flux Distribution, Sloping Magnetic Field and Magnetic Nanoparticles on the Natural Convective Flow Contained in a Square Cavity

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Fluid Dynamics & Materials Processing 2020年第3期16卷 441-463页

作者： latifa M.Al-Balushi M.M.Rahman Department of Mathematics College of ScienceSultan Qaboos UniversityMuscatOman

In the present paper,the effect of the heat flux distribution on the natural convective flow inside a square cavity in the presence of a sloping magnetic field and magnetic nanoparticles is explored *** nondimensional governing equations are solved in the framework of a finite element method implemented using the Galerkin *** role played by numerous model parameters in influencing the emerging thermal and concentration fields is examined;among them are:the location of the heat source and its lengthH,the magnitude of the thermal Rayleigh number,the nanoparticles shape and volume fraction,and the Hartmann *** is found that the nanofluid velocity becomes higher when the thermal source length,the nanoparticles volume fraction and/or the thermal Rayleigh number are increased,while it decreases as the Hartmann number Ha grows and the position of the heat source moves toward the center of the lower wall of the ***,the temperature of the nanofluid grows with the extension of the thermal source and decreases slowly when the heat flux position moves toward the center of the lower *** outcomes of the research also indicate that the average Nusselt number becomes smaller on increasing Hartmann number Ha and heat source length H^(*).The addition of Fe_(3)O_(4) to engine oil leads to a higher rate of heat transfer with respect to the addition of SiO_(2) ***-shaped nanoparticles generate the highest value of the Nusselt number compared to all the other considered shapes.

关键词： Nanofluids magnetic nanoparticles heat source natural convection finite element method square enclosure

XPS characterization and corrosion resistance of cerium-treated magnesium coatings

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Rare Metals 2011年第4期30卷 368-373页

作者： Samia Ben Hassen latifa Bousselmi Patrice Berot El Mustafa Rezrazi Ezzeddine Triki Unité de Recherche Corrosion & Protection des Métalliques ENITBP 37Tunis-BelvédèreTunisie Institut UTINAM CNRS UMR 6213Université de Franche-Comté16 route de Gray 25030 Besanon CedexFrance Laboratoire Traitement et Recyclage des Eaux CERTEBorj CedriaTunisie

Cerium conversion treatment was applied on magnesium coatings in a solution containing CeC13. The composition ot the cenum conversion layer on magnesium was investigated using X-ray photoelectron spectroscopy （XPS）, It was revealed that the composition predominately consisted of a three-valent state cerium compound with a relative abundance around 90%. Some of Ce^3＋ was oxidized to Ce^4＋. Electrochemical impedance spectroscopy results revealed that the total impedance of cerium-treated samples increased for a short immersion time in NaC1 solution before coating deteriorating. This deterioration was due to the coating porosity increasing and the breakdown of the conversion layer

关键词： cerium compounds magnesium coatings X-ray photoelectron spectroscopy corrosion resistance

Decentralized observers for a class of large-scale singular systems via LMI

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International Journal of Intelligent Computing and Cybernetics 2013年第2期6卷 158-181页

作者： Mejda Mansouri latifa Boutat-Baddas Mohamed Darouach Hassani Messaoud Ecole Nationale d’Ingenieurs de Monastir MonastirTunisie and Centre de Recherche en AutomatiqueNancy-UniversiteIUT de LongwyCosnes et RomainFrance Centre de Recherche en Automatique de Nancy Nancy-UniversiteCosnes et RomainFrance Ecole Nationale d’Ingenieurs de Monastir MonastirTunisie

Purpose–The purpose of this paper is to propose a decentralized observer for large-scale singular ***/methodology/approach–In this paper,the authors investigate the problem of observers’design for large-scale singular *** proposed decentralized observer is based on a new parameterization of the generalized Sylvester equation *** considered system is partitioned into small-sizes interconnected subsystems with unknown ***–A decentralized observer based on new parameterization of generalized Sylvester *** performance of the proposed approach is illustrated by a numerical ***/value–The proposed approach unites the full-order,the reduced-order and the minimal order observer design for large-scale *** conditions of the existence of this observer are given in the linear matrix inequalities(LMI)form.

关键词： Systems theory Design Control systems Large scale system Decentralized observer Singular system Linear matrix inequalities

Improvement in corrosion resistance of magnesium coating with cerium treatment

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Rare Metals 2009年第3期28卷 277-283页

作者： Samia Ben Hassen latifa Bousselmi Patrice Berot El Mustafa Rezrazi Ezzeddine Triki Unité de Recherche Corrosion & Protection des Métalliques ENITBP 37Tunis-BelvédèreTunisia Institut UTINAM CNRS UMR 6213Université de Franche-Comté16 route de Gray 25030 Besanon CedexFrance Laboratoire Traitement et Recyclage des Eaux CERTEBorj CedriaTunisia

Corrosion protection afforded by a magnesium coating treated in cerium salt solution on steel substrate was investigated using open circuit potential, polarization curves, and electrochemical impedance spectroscopy （EIS） in 0.005 M sodium chloride solution （NaCl）. The morphology of the surface was characterized by scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS）, and X-ray diffraction （XRD）. The cerium treated coating was obtained by immersion in CeCl3 solution. The results showed that the corrosion resistance of the treated magnesium coating was improved. The corrosion potential of the treated coating was found to be nobler than that of the untreated magnesium coating and the corrosion current decreased significantly. Impedance results showed that the cerium treatment increased corrosion protection. The improvement of anti-corrosion properties was attributed to the formation of cerium oxides and hydroxides that gave rise to a physical barrier effect.

关键词： magnesium coating cerium corrosion protection impedance spectroscopy

Natural convective heat transfer in a square enclosure utilizing magnetic nanoparticles

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Propulsion and Power Research 2019年第3期8卷 194-209页

作者： latifa M.Al-Balushi M.J.Uddin M.M.Rahman Department of Mathematics College of ScienceSultan Qaboos UniversityP.O.Box 36Al-KhodP.C.123MuscatSultanate of Oman Department of General Educational Development Daffodil International University102 ShukrabadDhanmondiDhaka 1207Bangladesh

In the present paper,unsteady natural convective heat transfer flow inside a square enclosure filled with nanofluids containing magnetic nanoparticles using nonhomogeneous dynamic model is investigated *** horizontal top wall of the enclosure is considered a colder wall and the bottom wall is maintained at uniform temperature whereas two other vertical walls of the cavity are thermally *** Galerkin weighted residual finite element method has been used to solve the governing non-dimensional partial differential *** numerical simulations,four types of nanoparticles such as magnetite(Fe_(3)O_(4)),cobalt ferrite(CoFe_(2)O_(4)),Mn-Zn ferrite(Mn-ZnFe_(2)O_(4)),and silicon dioxide(SiO2),and three types of base fluids such as water(H_(2)O),engine oil(EO)and kerosene(Ke)have been *** with previously published work are performed and excellent agreement is *** effects of various model parameters such as thermal Rayleigh number,nanoparticles volume fraction and nanoparticles shape factor are *** results show that the average Nusselt number increases as the thermal Rayleigh number and nanoparticles volume fraction *** results indicate that the average Nusselt numbers are higher for the blade shape of nanoparticles.

关键词： Nanofluids Nanoparticles Heat transfer Natural convection Square enclosure Finite element method