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Perambalur, India

Ananth J.,Roever Engineering College | Thulasi S.,Anna University | Jayasuthakar S.T.,Anna University | Sheeba K.N.,Institute of Chemical Technology
Renewable and Sustainable Energy Reviews | Year: 2011

Solar water heating system proves to be an effective technology for converting solar energy into thermal energy. The efficiency of solar thermal conversion is around 70% when compared to solar electrical direct conversion system which has an efficiency of only 17%. Hence solar water heaters play a vital role in domestic as well as industrial sector due to its ease of operation and simple maintenance. Extensive works on improving the thermal efficiency of solar water heaters resulted in techniques to improve the convective heat transfer. Passive technique has been used to augment convective heat transfer. These techniques when adopted in solar water heaters proved that the overall thermal performance improved significantly. This paper reviews various techniques to enhance the thermal efficiency in solar water heater. In addition to this, a detailed discussion on the limitations of existing research, research gap and suggested possible modifications is made. © 2011 Published by Elsevier Ltd. Source

Annadurai M.,Roever Engineering College | Charles S.,Dhanalakshmi College of Engineering
International Journal of Applied Engineering Research | Year: 2015

Friction stir process (FSP) is a similar solid state welding technique as friction stir welding (FSW). In FSW a non consumable rotating tool with a specially designed pin and shoulder is plunged into the interface between two plates to be joined and traversed along the line of joint. Localized heating is produced by the friction between the rotating tool and the work piece to raise the local temperature of the material to the range where it can be plastically deformed easily. FSP is a local thermo mechanical metal working process that changes the local properties without influencing the properties of the bulk material. The main aim of this study to review the friction stir welding (FSW) and friction stir process (FSP) of aluminum alloys with a focus on the analysis of the resulting microstructure, mechanical testing and the tools employed for processing the metals and also present an insight into future research in this area of study. © Research India Publications. Source

Kannan R.,Roever Engineering College | Selvaganesan C.,Thiagarajar College of Engineering | Vignesh M.,Thiagarajar College of Engineering | Babu B.R.,Thiagarajar College of Engineering | And 4 more authors.
Renewable Energy | Year: 2014

In this work, a vapor adsorption type solar still was designed, fabricated and tested at Thiagarajar College of Engineering, Madurai, India. A vapor adsorbent pipe network comprising activated carbon-methanol pair was integrated with the basin. Losses from the bottom of the still are considerably reduced due to sensible heat absorption by the activated carbon and latent heat of vaporization by methanol. Also water circulated through the inner tube of the adsorbent bed is used as a feed to basin, thus enhancing the evaporation rate during day time. The increase in temperature of the basin due to adsorbent bed and condensation of methanol vapor, augments the evaporation rate during the night time also. Sponges, gravels, sand and black rubbers were used in the vapor adsorption type solar still for improving the yield. Experimental results were compared with ordinary conventional basin type still. The governing energy balance equations for both conventional and vapor adsorption type solar still were solved analytically and compared with experimental results. Theoretical analysis gave very good agreement with experimental results. © 2013 Elsevier Ltd. Source

Boobalan M.S.,St. Josephs College | Boobalan M.S.,Roever Engineering College | Amaladasan M.,St. Josephs College | Tamilvendan D.,National Institute of Technology Tiruchirappalli | And 2 more authors.
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2014

The antioxidant active Mannich base 1-[anilino (phenyl) methyl] pyrrolidine-2,5-dione (APMPD) have been synthesized and its FT-IR and FT-Raman vibrational spectra were recorded within the region of 4000 cm-1, 50 cm-1 respectively. The molecular geometric parameters of APMPD have been computed using HF and DFT model theories. The energies of APMPD are calculated for all the eight possible conformers using B3LYP method at 6-311++G(d,p) basis set. From the computational results, the M1 conformer was identified as the most stable conformer of APMPD. The stable conformer was compared with experimental crystal geometry, which again fortifies the results of conformer analysis. The fundamental vibrations of the molecule are assigned according to the characteristic region and the literature report. The predicted highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy gap provide vivid idea on charge transfer behavior of APMPD. The molecular electrostatic potential (MEP) and Mulliken charge analysis indicate the feasible electrophilic and nucleophilic reactive sites on APMPD. The thermodynamic properties (heat capacity, entropy, and enthalpy) of the title compound at various temperatures are calculated in gas phase. © 2014 Elsevier B.V. All rights reserved. Source

Desai D.,Government Engineering College | Mariappan V.,Roever Engineering College | Sakhardande M.,Government Engineering College
International Journal of Performability Engineering | Year: 2011

Reversed hazard rate (RHR) is a useful tool in the area of maintenance management, particularly for condition monitoring. Its typical behaviour makes it suitable for the assessment of waiting time and hidden failures. Nature of reversed hazard rate is therefore, analytically and numerically investigated, for the standard distributions and presented in this paper. It is shown that RHR is a decreasing function for important statistical distributions, which rather makes it viable to be used in the field of maintenance engineering. Required data was simulated in MATLAB version 7.0. The results are discussed and presented in the paper. © RAMS Consultants. Source

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