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RISS 인기검색어
- 검색키워드
- 저자 : Saeed Hasanzadeh (검색결과 5 건)
- 무료
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Analysis and Optimization of Permanent Magnet Dimensions in Electrodynamic Suspension Systems
Saeed Hasanzadeh,Hossein Rezaei,Ehsan Qiyassi 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.1
In this paper, analytical modeling of lift and drag forces in permanent magnet electrodynamic suspension systems (PM EDSs) are presented. After studying the impacts of PM dimensions on the permanent magnetic field and developed lift force, it is indicated that there is an optimum PM length in a specified thickness for a maximum lift force. Therefore, the optimum PM length for achieving maximum lift force is obtained. Afterward, an objective design optimization is proposed to increase the lift force and to decrease the material cost of the system by using Genetic Algorithm. The results confirm that the required values of the lift force can be achieved; while, reducing the system material cost. Finite Element Analysis (FEA) and experimental tests are carried out to evaluate the effectiveness of the PM EDS system model and the proposed optimization method. Finally, a number of design guidelines are extracted.
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Analysis and Optimization of Permanent Magnet Dimensions in Electrodynamic Suspension Systems
Hasanzadeh, Saeed,Rezaei, Hossein,Qiyassi, Ehsan The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.1
In this paper, analytical modeling of lift and drag forces in permanent magnet electrodynamic suspension systems (PM EDSs) are presented. After studying the impacts of PM dimensions on the permanent magnetic field and developed lift force, it is indicated that there is an optimum PM length in a specified thickness for a maximum lift force. Therefore, the optimum PM length for achieving maximum lift force is obtained. Afterward, an objective design optimization is proposed to increase the lift force and to decrease the material cost of the system by using Genetic Algorithm. The results confirm that the required values of the lift force can be achieved; while, reducing the system material cost. Finite Element Analysis (FEA) and experimental tests are carried out to evaluate the effectiveness of the PM EDS system model and the proposed optimization method. Finally, a number of design guidelines are extracted.
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Alireza Khataee,Saeed Sajjadi,Aliyeh Hasanzadeh,주상우 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.75 No.-
Herein, Fe3O4 nanospheres attached on N, S co-doped graphene quantum dots (NSG) enclosed CdSenanoparticles (CdSe/NSG–Fe3O4) is introduced as a magnetic high-performance photocatalyst for theheterogeneous photodegradation of methylene blue in aqueous solutions. The as-prepared CdSe/NSG–Fe3O4 nanocatalyst showed high stability and adequate ferromagnetism which makes it easy to beseparated and reused. CdSe/NSG–Fe3O4 nanocomposites displayed enhanced photocatalytic activity forthe degradation of organic compounds such as azo-dyes compared with CdSe nanoparticles. In view ofthese advantages offered by the prepared nanocatalyst, it has a high potential for the degradation oforganic contaminants.
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Alireza Khataee,Saeed Sajjadi,Shima Rahim Pouran,Aliyeh Hasanzadeh 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.56 No.-
Herein, air, argon, nitrogen and oxygen plasmas were used in glow discharge plasma under alternativecurrent to enhance the surface properties of graphite. The plasma-treated graphite electrodes (PTGE)were used as cathode in electro-Fenton (EF) for Acid Orange 7 (AO7) degradation. O2-PTGE exhibited thebest activity owing to its improved surface characteristics. Later, the effects of the main operationalcondition on O2-PTGE efficacy in EF and the stability of O2-PTGE were evaluated and degradationintermediates were identified. Finally, the performance of the studied system was assessed inheterogeneous condition using martite as catalyst and compared with homogeneous system.
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Khataee, Alireza,Sajjadi, Saeed,Pouran, Shima Rahim,Hasanzadeh, Aliyeh,Joo, Sang Woo Elsevier 2017 ELECTROCHIMICA ACTA Vol.244 No.-
<P><B>Abstract</B></P> <P>The present study reports a simple modified method that enhanced the surface characteristics of graphite electrode towards greater hydrogen peroxide production. In this method, the plasmas of various gases vis. air, argon and nitrogen were used in alternating current glow discharge plasma (AC-GDP) technique to treat graphite surface. The morphology, microstructure, roughness, disorder degree, surface chemical composition and carbon state of the graphite samples were determined before and after plasma treatments. The formation of 3D nanostructures and enhancement in surface characteristics resulted in effective H<SUB>2</SUB>O<SUB>2</SUB> generation over the plasma-treated electrodes. Particularly, air plasma-treated electrode showed higher efficiencies by producing 119μmol/L H<SUB>2</SUB>O<SUB>2</SUB>, owing to etching effect of oxygen-content and improved wettability. Furthermore, the pH, applied current and electrolyte concentration had distinct effects on the H<SUB>2</SUB>O<SUB>2</SUB> yield. The results indicated that AC-GDP using air plasma can be a promising technique for developing high efficient graphite electrodes for facile electro-generation of hydrogen peroxide.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Air, Ar and N<SUB>2</SUB> gases were used in alternating current glow discharge plasma method. </LI> <LI> The employed plasmas resulted in 3D nanostructured-surface of graphite electrodes. </LI> <LI> The plasma-treated electrodes gave rise to greater H<SUB>2</SUB>O<SUB>2</SUB> electro-production. </LI> <LI> Air-GDP was the most effective. owing to etching effect of the oxygen-content. </LI> <LI> pH, current and electrolyte concentration had distinct effects on accumulated H<SUB>2</SUB>O<SUB>2</SUB>. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Schematic illustration of the preparation of nanostructured graphite samples by treatment under air, N<SUB>2</SUB> and Ar plasmas.</P> <P>[DISPLAY OMISSION]</P>
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