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Nachiappan N.,Sri Venkateswara College of Engineering | Nachiappan N.,Alagappa University | Kalaignan G.P.,Alagappa University | Sasikumar G.,Chennai Institute of Technology
Ionics | Year: 2013

Proton exchange membrane fuel cells [PEMFC] have become highly attractive for stationary as well as mobile energy applications due to their good efficiency compact cell design and zero emissions. PEM fuel cells mainly consist of anode and cathode containing platinum/platinum alloy electrocatalysts and Nafion membrane as the electrolyte. They operate on hydrogen fuel, which is generally produced by reforming of hydrocarbons, alcohols such as methanol and may contain large amounts of impurities such as methanol, carbon dioxide, trace amounts of carbon monoxide, etc. The studies on the effect of methanol impurity in hydrogen on fuel cell performance and methods of mitigation of poisoning are very important for the commercialization of fuel cells and are described in a limited number of papers only. In this paper, we present the studies on the influence of methanol impurity in hydrogen for the PEM fuel cells. The effect of various parameters such as methanol concentration, cell voltage, current density, exposure time, reversibility, operating temperature, etc. on the cell performances was investigated using pure hydrogen. Various methods of methanol poisoning mitigation were also investigated. © 2012 Springer-Verlag.

Balan K.N.,Rajiv Gandhi University | Ramesh Bapu B.R.,Chennai Institute of Technology | Roy R.,Rajiv Gandhi University
Advanced Materials Research | Year: 2013

Various researches are being conducted in many parts of the world, to improve the surface characteristics of the materials. Thermal spray coating is one of the methods used for enhancing the surface property of the material. Our experiment deals with the study of detonation gun spray coating of WC-12Co, WC-10Co-4Cr and Cr2C3-25NiCr powders. The coating was done on SS316 substrate by varying the process parameters. The process parameters were optimized using Taguchi method to obtain greater hardness. © (2013) Trans Tech Publications, Switzerland.

Mahalingam S.,Sathyabama University | Ramesh Bapu B.R.,Chennai Institute of Technology
International Review of Mechanical Engineering | Year: 2013

In the fast growing world of automobiles, the demand for petroleum products is increasing day by day. Many of renewable energies are used to full fill that demand. One of the best alternatives is the use of biodiesel. In this study a dual fuel blend with pure diesel in a single cylinder direct injection constant speed diesel engine was analyzed by varying the power outputs with different proportions of the fuel blends. In the dual fuel operation, the rubber seed oil and jatropha oil blends with diesel. The proportions of 20% and 40% blend have been investigated on volume basis. In this dual fuel operation is observed that they have higher emission of hydrocarbon (HC) and carbon monoxide (CO) emissions than the ester, diesel blend. The ignition delay was reduced using dual fuel blend with diesel and efficiencies were improved. The proportion, B20 (20% of biodiesel) is gives the optimum efficiency with low emission. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.

Elangovan P.,Chennai Institute of Technology | John Peter A.,Government Arts College
Results in Physics | Year: 2012

On the basis of model solid theory, the band offsets for a Zn1-xinMgxinSe/Zn1-xoutMgxoutSe quantum dot structure are determined. The exciton binding energies due to heavy and light holes with the variation of Mg alloy are reported. The effect of mismatch between the dielectric constants between the dot and the barrier is taken into account. The exciton transition energy as functions of dot radius and Mg content is computed. The dependence of the excitonic transition energies on the geometrical confinement and the Mg alloy is brought out. © 2012 Elsevier B.V.

Anand K.T.,Sathyabama University | John Rajan A.,Sathyabama University | Narayanan K.V.,Sathyabama University | Ramesh Bapu B.R.,Chennai Institute of Technology
International Journal of Applied Engineering Research | Year: 2015

This paper discusses the application of green, sustainable technology of plasma treatment as an aid to improve the supply chain management in spinning with a number of advantages. Suitable suggestions have been given to incorporate this treatment in the processing of yarn and to take advantage of it. The advantages of plasma treatment applied to yarns in terms of better absorbency, wettability and improved dyeability have been discussed in depth. © Research India Publications.

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