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Sivakumar N.,Jayalakshmi Institute of Technology | Radhika P.,Adhiyamaan Engineering College
International Journal of Applied Engineering Research

In this paper we investigate the fuzzy optimization of electric vehicle (EV) and home energy scheduling. Our objective is to minimize the total electricity cost while considering user com-fort preference. We take both household occupancy and EV travel patterns into account. The novel contributions of this paper lie in the exploitation of EVs as dynamic storage facility as well as de-tailed modeling of user comfort preference, thermal dynamics, EV travel, and customer occupancy patterns in a concrete optimization framework. Extensive numerical results are presented to illustrate the efficacy of the proposed design. Specifically, we show that the proposed design can achieve significant saving in electricity cost, allow more flexibility in setting the tradeoff between cost and user comfort, and enable to reduce energy demand during peak hours. We also demonstrate the benefits of applying the proposed framework to a residential community compared to optimization of individual household separately. © Research India Publications. Source

Sivakumar N.,Jayalakshmi Institute of Technology | Dayanadevi S.,Adhiyamaan Engineering College
International Journal of Applied Engineering Research

The Photovoltaic (PV) based power generation systems are popular nowadays. In this PV based systems the voltage stress across the power devices and leakage current are the major issues in transformer-less grid connected photovoltaic system. To overcome the above drawbacks of the inverter based single stage transformer less grid connected photovoltaic system is presented in this paper. The advantages of low leakage current, reduced voltage stress, less passive components and no shoot through problem compared to other type transformers grid connected inverter system. The analytical model of leakage current based on grid connected PV system is derived and simulated using MATLAB /Simulink. Finally the performance of the system is experimentally verified; it shows the satisfactory operation in a grid connection mode. © Research India Publications. Source

Jeevanantham C.,Jayalakshmi Institute of Technology
International Journal of Applied Engineering Research

This paper proposes an isolated coupled-inductor integrated dc–dc converter with a voltage doubler for solar energy applications. The proposed converter realizes high step-up voltage gain without incurring a high coupled inductor turns ratio by adapting a dual-voltage doubler circuit. In addition, the energy in the coupled inductor leakage inductance can be recycled on the primary side. Thus, the system efficiency is improved. Finally, a laboratory prototype for demonstrating the performance of the proposed circuit is implemented with voltage doubler 12.5-V input voltage, and a 280-V output voltage. The experimental results show that the peak efficiency of the proposed converter is about 95%. © Research India Publications. Source

Thilagavathi N.,Salem College | Subramani T.,Anna University | Suresh M.,Jayalakshmi Institute of Technology
Disaster Advances

Salem Chalk Hills, Tamil Nadu, India lies amidst the mineral rich geological formation. The region has been experiencing a lot of land use/land cover changes induced by both people and industries in recent years following the exploitation of different minerals. The overburden of mines when dumped in unmined areas creates mine spoils which ultimately affect the surrounding. This study sought to determine the rate of land cover changes that occurred in Salem Chalk Hills region since 2002. This was achieved through the use of satellite image of LANDSAT TM and IRS P6 LISS IV MX. Therefore, present study has been undertaken to analyze the process of humaninduced landscape transformation in the mine affected areas of Chalk Hills of Salem by interpreting temporal remote sensing data for the year 2002 and 2012 using GIS. Land use changes have been detected by image processing techniques. Field observation and measurements have also employed to validate results from remotely sensed data. Results show that the rate of land use/land cover change has been significant and it is due to mining activities. This accelerated change is mainly attributing to cultivation. It has been observed that there are significant changes especially in agricultural land and built-up area. During 2002 buildup land is 11.24 km2 and it is increased as 44.28 km2(11.60%) in 2012. The area of water body has been shrunk by about 0.38%. Changes in the agricultural lands are related to urban population growth of the study area. The expansion of build up lands and urban areas and contraction of agricultural land and water bodies leads to environmental degradation in the form of soil erosion. Similarly land with scrub decreased and land without scrub is increased. Source

Krishnakumar V.,Periyar University | Shanmugam G.,Periyar University | Shanmugam G.,Jayalakshmi Institute of Technology
Materials Letters

Third-order nonlinear optical properties of Mg doped CdS-PVP films have been studied by Z-scan technique with 5 ns pulses, mod-locked Nd-YAG laser with a frequency doubled at 532 nm. The nonlinear refractive indices and nonlinear absorption coefficients were in the order of 10-10 cm2/W and 10-3 cm/W and they are characterized with self-defocusing and saturable absorption behavior. The maximum third-order nonlinear optical susceptibility (χ3) and figure of merit are found to be about 1.432×10-4 esu and 8.558×10-9 esu m, respectively. The estimated χ3 is two to three orders of magnitude larger than that of the CdS film. © 2014 Elsevier B.V. All rights reserved. Source

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