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Experimental investigation of anodized/spray pyrolysed nanoporous structure on heat transfer augmentation

Journal of Thermal Science 2009年第4期18卷 358-363页

作者： Kalaiselvam S. Gugan M.S. Kuraloviyan E. Meganathan R. NiruthiyaPriyan A. Swaminathan M.R. Department of Mechanical Engineering Anna University Chennai

This paper analyzes the effects of nanoporous surface on heat transfer temperaments of assorted thermal conductingmaterials. A phenomenal proposal of wielding the surface roughness to ameliorate the heat transfer ratehas been discovered. The maximum increase of heat transfer rate procured by nanoporous layers is 133.3% higherthan the polished bare metals of surface roughness 0.2μm. This plays an imperative role in designing compact refrigerationsystems, chemical and thermal power plants. Experimental results picture a formidable upswing of58.3% heat transfer in chemically etched metals of surface roughness 3 μm, 133.3% in nanoporous surface of porosity75-95 nm formed by electrochemical anodization, and porosity of 40-50 nm formed by spray pyrolysis.increasesthe heat transfer by 130%. Effects of porosity, flow velocity and scaling on the energy transfer are alsoscrutinized. This paper also analyzes the multifarious modes of nanoporous fabrication, to contrive both prodigiousand provident system.

关键词： Nanoporous surface Heat transfer augmentation Electrochemical anodization spray pyrolysis.

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Influence of Tin Doping on the Photocatalytic Activity of Zinc Oxide Thin Films under UV Light

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Journal of Chemistry and Chemical Engineering 2012年第7期6卷 631-637页

作者： Praramate Mongkolserm Suwat Pabchanda Centre of Excellence for Innovation in Chemistry-PERCH-CIC Department of Chemistry Faculty of Science Ubon RatehathaniUniversity Ubon Ratchathani 34190 Thailand

Pure ZnO and Sn-doped ZnO thin films were successfully prepared by the spray pyrolysis.method onto glass substrates. The obtained films were characterized by XRD （X-ray diffraction）, SEM （scanning electron microscopy） and ultraviolet-visible spectroscopy. The XRD results showed that the FWHM of Sn-doped ZnO film increased due to the substitution of Sn for Zn, the tin doping within the film causes the ZnO crystallinity to deteriorate. The grains of the film doped with Sn using dibutyltin diacetate were found to be non-uniform distribution through the sample but those appeared to form ganglia-like hills in the case of pure ZnO film. Furthermore, the Sn-doped ZnO films were tested with respect to the photocatalysis in aqueous solutions of MG （malachite green） upon UV-light illumination and in darkness. It was found that Sn-doped ZnO films prepared under specific conditions showed a lower photocatalytic activity than that of pure ZnO films.

关键词： Zinc oxide thin film photocatalytic activity spray pyrolysis.

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Modeling and Simulation of a 6 DOF Robot

Modeling and Simulation of a 6 DOF Robot

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International Conference on Optimization of the Robots and Manipulators（OPTIROB 2011）

作者： Monica Enescu Catalin Alexandru Transilvania University of Brasov Renewable Energy Systems and Recycling Center No. 29 Eroilor Boulevard 500036 Brasov Romania

The purpose of this paper is to model and simulate a 6 DOF robotic system with revolute joints in order to optimize the motion law which results in uniform coating deposited by spray pyrolysis. The structure and the complexity of the robotized system are determined by the necessary movements in the spray pyrolysis.process. The nozzle （end-effector of the robot manipulator） has two translations, in longitudinal and transversal direction relative to the surface deposition. The mechanical model of the robot mechanism was developed by using the MBS （Multi Body Systems） environment ADAMS of MSC Software.

关键词： robot manipulator trajectory planning inverse kinematics MBS spray pyrolysis.

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