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Chidambaram L.A.,Annamalai University | Ramana A.S.,Sri Sai Ram Engineering College | Kamaraj G.,Annamalai University | Velraj R.,Anna University
Renewable and Sustainable Energy Reviews | Year: 2011

Power shortage and unstable power supply remain serious problems. Conventional cooling technologies that utilize harmful refrigerants consume more energy and cause peak loads leading to negative environmental impacts. As the world grapples with the energy and environmental crisis, there is an urgent need to develop and promote environmentally benign sustainable cooling technologies. Solar cooling is one such promising technology, given the fact that solar energy is the cheapest and widely available renewable energy that matches the cooling load requirements. Thermal storage systems are essential to overcome the disadvantage of the intermittent nature of solar energy and variation in cooling demand. The enhanced utilization of solar energy and other consequences of thermal storage integrated systems have gained the attention of researchers in the recent years. This paper reviews research articles in the field of solar cooling techniques, solar collectors, storage methods and their integration, along with performance improvement studies reported using thermal stratification and cascaded thermal storage systems. © 2011 Elsevier Ltd. All rights reserved. Source

Srinivasan V.S.,Anna University | Rajendra Boopathy S.,Anna University | Sangeetha D.,Anna University | Vijaya Ramnath B.,Sri Sai Ram Engineering College
Materials and Design | Year: 2014

Hybrid materials of any kind are the keynote for today's demands. This paper deals with one of such hybrid composite made of natural fibres namely, banana and flax fibres. The structural build-up is such that one layer of banana fibre is sandwiched between two layers of flax fibres by hand layup method with a volume fraction of 40% using Epoxy resin and HY951 hardener. Glass fibre reinforcement polymer (GFRP) is used for lamination on both sides. This lamination also increases the overall mechanical properties along with better surface properties. The properties of this hybrid composite are determined by testing its tensile, impact, and flexural loads using a Universal testing machine. Thermal properties are analysed and hybrid composites of flax and banana with GFRP have better thermal stability and flame resistance over flax, banana with GFRP single fibre hybrid composites. Morphological analysis is done using Scanning Electron Microscope (SEM). The result of test shows that hybrid composite has far better properties than single fibre glass reinforced composite under impact and flexural loads. However it is found that the hybrid composite have better strength as compared to single fibre composites. © 2014 Elsevier Ltd. Source

Ramesh M.,Sri Sai Ram Engineering College | Ramesh M.,Jawaharlal Nehru Technological University Anantapur | Palanikumar K.,Sri Sai Ram Institute of Technology | Reddy K.H.,Andhra University
Procedia Engineering | Year: 2013

The incorporation of natural fibres such as sisal/jute with glass fiber composites has gained increasing applications both in many areas of Engineering and Technology. The aim of this study is to evaluate mechanical properties such as tensile and flexural properties of hybrid glass fiber-sisal/jute reinforced epoxy composites. Microscopic examinations are carried out to analyze the interfacial characteristics of materials, internal structure of the fractured surfaces and material failure morphology by using Scanning Electron Microscope (SEM). The results indicated that the incorporation of sisal fiber with GFRP exhibited superior properties than the jute fiber reinforced GFRP composites in tensile properties and jute fiber reinforced GFRP composites performed better in flexural properties. © 2012 Published by Elsevier Ltd. Source

Ranjana R.,Anna University | Raja J.,Sri Sai Ram Engineering College
Proceedings of the 2013 International Conference on Green Computing, Communication and Conservation of Energy, ICGCE 2013 | Year: 2013

Cloud computing is one of the fast spreading technologies for providing utility based IT services to users. These services are provided by large-scale virtualised data centers. As it is these data centers consume large amount of electrical energy for their operation and maintenance. Extensive research had been undertaken to reduce the power consumption of data center by bringing changes in the hardware technology of data center. Alternatively, virtualization can also be used to reduce the power consumption in a data center. Migration of virtual machines(VM), one of the key feature of virtualization can be used to consolidate workloads on fewer servers and thus switch off idle servers to conserve energy. The major concern in any server consolidation technique is the optimal choice of physical server for VM placement. This paper aims to summarise the available VM placement algorithm that takes into consideration the power consumption factor during VM migration. A survey of various solutions to VM placement based on bin packing strategy is discussed. © 2013 IEEE. Source

Gokulakrishnan D.,Sri Sai Ram Institute of Technology | Latha B.,Sri Sai Ram Engineering College
Journal of Medical Imaging and Health Informatics | Year: 2016

The prominence of the internet technology plays an essential role in the health care and medical emergency system in human life. The medical organization's web servers are used to perform the millions of transactions like medical records, e-health reports, etc., per day. Even though the medical web server improves the utilizing rate while establishing health care and emergency system, it has high response time due to the lack of utilizing the internet and real time technologies. This drawback leads to create web traffic while accessing the health care system which increase the difficulties during searching and viewing of the patients current health care records, doctor, hospital and drug information also difficulty to manage the communication between the various medical units. The present paper focused on analyzing, measuring and evaluating the performance of the medical web servers with a goal of scalability planning models. The scalability model handles the medical web server in terms of using the Flow-Packet-Level Model to obtain the notion of the various network operations and it provides different insights about its performance of the internet medical web servers. The proposed scalable network has been modeled using the Extended Queuing Petri Net to enable the users to bring about the design of reliable and optimized systems. The performance of the system is evaluated using the scalability, time and Average server load performance metrics. © Copyright 2016 American Scientific Publishers All rights reserved. Source

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