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John Panneer Selvam D.,P.A. College | Vadivel K.,SSM Institute of Engineering and Technology
Procedia Engineering | Year: 2012

This paper evaluates the possibility of using methyl esters from animal fats as an alternative fuel for diesel. Biodiesel is an alternative fuel produced from different kinds of vegetable oils and animal fats. It is an oxygenated, non-toxic, sulfur free, biodegradable and renewable fuel that can be used in diesel engines without any significant modifications. Performance and exhaust emissions of direct injection diesel engine have been experimentally investigated with methyl esters of beef tallow as neat biodiesel (B100) and its blend (B5, B25, B50 and B75) with diesel fuel. Engine performance parameters namely brake power, brake specific fuel consumption, brake thermal efficiency and exhaust emissions of CO, HC, NOx, and smoke density were determined for different loading conditions and at constant engine speed of 1500 rpm. The test result indicates that there is a slight decrease in brake thermal efficiency and increase in specific fuel consumption for all the blended fuels when compared to that of diesel fuel. The drastic reduction in carbon monoxide, unburned hydrocarbon and smoke density were recorded for all the blended fuels as well as with neat biodiesel. However, in the case of oxides of nitrogen, there is a slight increase for all the blended fuels and with neat biodiesel when compared to diesel fuel. On the whole, methyl esters of beef tallow and its blends with diesel fuel can be used as an alternative fuel for diesel in direct injection diesel engines without any significant engine modification. © 2012 Published by Elsevier Ltd. Source


Vengaian K.M.,Anna University | Britto C.D.,Anna University | Sivaraman G.,Institute for Stem Cell Biology and Regenerative Medicine | Sekar K.,Anna University | Singaravadivel S.,SSM Institute of Engineering and Technology
RSC Advances | Year: 2015

The design and development of new phenothiazine-based fluorescent probes, which display a selective fluorescence response to mercury and fluoride ions, were described. The probe is the first example that facilitates the detection of Hg2+ at nanomolar concentrations. The sensitivity of probe P-1 to Hg2+ and F- was demonstrated in living cells, and cell toxicity assays revealed that probe P-1 can be used for selective imaging of Hg2+ and F- in living cells. Moreover, the simple probe design presented here may contribute to the development of more efficient and more useful dual-mode probes. © 2015 The Royal Society of Chemistry. Source


Valan Rajkumar M.,SSM Institute of Engineering and Technology | Manoharan P.S.,Thiagarajar College of Engineering
International Review on Modelling and Simulations | Year: 2013

This paper presents a control for a three-phase seven-level diode-clamped multilevel inverter (DCMLI) for grid connected photovoltaic (PV) systems which improves dc link utilization, output voltage quality and avoids the dc link capacitor voltage balancing problem experienced with standard multilevel operation. The maximum power point tracking (MPPT) is capable of extracting maximum power from PV array connected to each DC link voltage level. The MPPT algorithm is solved by fuzzy logic controller (FLC). Space vector pulse width modulation (SVPWM) algorithm uses a simple mapping to generate gate signals for the inverter. A digital proportional integral (PI) current control algorithm is used to remain the current injected into the grid sinusoidal and to achieve high dynamic performance with low total harmonic distortion (THD). The validity of the system is verified through MATLAB/Simulink and the results are compared with three-phase three-level and five-level DCMLI for PV system in terms of THD. Finally, simulation results are presented to verify the effectiveness and accuracy of the proposed system. © 2013 Praise Worthy Prize S.r.l. - All rights reserved. Source


Valan Rajkumar M.,SSM Institute of Engineering and Technology | Manoharan P.S.,Thiagarajar College of Engineering
International Review on Modelling and Simulations | Year: 2013

This paper presents a control for a three-phase an eleven-level cascaded H-bridge inverter for photovoltaic (PV) system. The maximum power point tracking (MPPT) is capable of extracting maximum power from the PV array connected to each DC link voltage level. The MPPT algorithm is solved by fuzzy logic controller. Space vector pulse width modulation (SVPWM) algorithm uses a simple mapping to generate gate signals for the inverter. This is done to achieve high dynamic performance with low total harmonic distortion (THD). The validity of the system is verified through MATLAB/Simulink and results are compared with three-phase three-level, five-level, seven-level and nine-level cascaded H-bridge inverter for PV system in terms of THD. Finally, simulation results are presented to verify the effectiveness and accuracy of the proposed system. © 2013 Praise Worthy Prize S.r.l. - All rights reserved. Source


Uthayakumar R.,Gandhigram Rural Institute | Rameswari M.,SSM Institute of Engineering and Technology
International Journal of Advanced Manufacturing Technology | Year: 2013

The success of the Japanese in the employment of just-in-time (JIT) production has received a great deal of attention in the past two decades. The underlying goal of JIT is to eliminate wastes, which can be achieved through various efforts such as shortening lead time and improving quality. The objective of this study is to extend the model of Huang et al. (Eur J Oper Res 202:473-478, 2010) by allowing deterministic variable lead time and quality improvement investment on an integrated inventory model. That is, this article develops an integrated inventory model which jointly determines the optimal order quantity, process quality, lead time, and the frequency of deliveries simultaneously. Furthermore, a solution procedure is suggested for solving the proposed model, and numerical examples are given to illustrate the benefit of coordination between vendor and buyer. © 2012 Springer-Verlag London Limited. Source

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