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.
Boobalan M.S.,St. Joseph's College |
Boobalan M.S.,Roever Engineering College |
Amaladasan M.,St. Joseph's 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.
Varadharajan R.,Roever Engineering College
IEEE-International Conference on Advances in Engineering, Science and Management, ICAESM-2012 | Year: 2012
A mobile ad-hoc network (MANET) is a collection of mobile nodes which communicate over radio. These kind of networks are very flexible, thus they do not require any existing infrastructure or central administration. Therefore, mobile ad-hoc networks are suitable for temporary communication links. As the nodes are mobile, it is very difficult to find the path between two end points. This paper presents a survey of routing algorithms for finding path between nodes in mobile ad hoc network.. In recent years,several routing algorithms have been proposed for mobile ad hoc networks and prominent among them are ant-colony, bee-colony, termite, distance vector routing and novel. The functions and features involved in implementation of different routing algorithms for MANET are discussed in detail giving comparative study of various routing algorithms. © 2012 Pillay Engineering College.
Susila S.G.,Roever Engineering College |
Raja J.,Anna University
ICSICT-2010 - 2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology, Proceedings | Year: 2010
The Wireless sensor network (WSN) is a type of the wireless ad-hoc networks. It consisting of a large number of sensors is effective for gathering data in a variety of environments. Since the sensors operate on battery of limited power, it is a great challenging aim to design an energy efficient routing protocol, which can minimize the delay while offering high-energy efficiency and long span of network lifetime. In this paper, we first completely analyzes the basic distributed clustering routing protocol LEACH (Low Energy Adaptive Clustering Hierarchy), then proposed a new routing protocol and data aggregation method in which the sensor nodes form the cluster and the cluster-head elected based on the residual energy of the individual node calculation without re-clustering and the node scheduling scheme is adopted in each cluster of the WSNs. In the node scheduling scheme (ACTIVE and SLEEP mode) the energy efficiency is increased near to 50% than LEACH protocol and lifetime of the networks also increased. Simulation results using MATLAB are shows that the proposed routing protocol significantly reduces energy consumption and increase the total lifetime of the wireless sensor network compared to the LEACH protocol. ©2010 IEEE.
Ananth J.,Roever Engineering College
Energy | Year: 2014
Influences of left-right tube insert regularly spaced with rod and spacer on heat transfer and friction factor characteristics in a thermosiphon solar water heater have been analyzed comprehensively. Results showed that the modified designs of twists reduce the pressure drop significantly between 47.2% and 8.9% lower than the drop offered by full length twist and improve the overall instantaneous thermal efficiency between 53.3% and 38.7% when compared with plain tube collector. Thus an attempt has been made to improve the internal convective heat transfer with lesser pressure drop between the tube wall and fluid in the collector and to test the possibility of using customized designs of left-right twist as tube insert. © 2013 Elsevier Ltd.
Ananth J.,Roever Engineering College
Energy Conversion and Management | Year: 2013
Experimental investigation of heat transfer and friction factor characteristics of thermosyphon solar water heater with full length helical twist of twist ratio 3, twist with rod and spacer of lengths 125, 250 and 500 mm has been studied. The experimental data for plain tube collector has been compared with fundamental equation falls within the acceptable limits for Nusselt number and friction factor. Findings shows that the Nusselt number decreases with increase in rod and spacer length and the pressure drop increases with decrease in rod and spacer length when compared with full length twist. Further the correlations developed for friction factor and Nusselt number has predicted the experimental data satisfactorily. The heat transfer enhancement in twist fitted with rod is found to be superior when compared with twist fitted with spacer. © 2013 Elsevier Ltd. All rights reserved.
Nagavinothini R.,SRM University |
Balamurugan P.,Roever Engineering College
International Journal of Earth Sciences and Engineering | Year: 2015
A number of metaheuristic search techniques have been widely used in recent years for the optimization of structures. Among these metaheuristic techniques, particle Swarm Optimizer is well suited for handling large scale steel structures. The main objective of this paper is to examine the performance of the Particle Swarm Optimization algorithm to optimize the transmission Line towers. A transmission line tower is a complex steel structure, for which the design is characterized by the special requirements to be met from both electrical and structural points of view. However, there is a scope for weight minimization. First, the tower is analyzed and optimized using STAAD pro. Then, the optimization is performed using PSO algorithm in MATLAB. The obtained result reveals that PSO metaheuristic search technique is a powerful method for optimizing steel towers. © 2015 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.
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.
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.
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.