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Anna University , formerly Perarignar Anna University of Technology , is a technical university in Tamil Nadu, India. It's been ranked 6th best university in India. The university encompasses within it one of the oldest technical institutes in the world and has a history spanning 220 years . It was renamed 'Anna University' on 4 September 1978 as a unitary university, named after C. N. Annadurai. It became an affiliating university in 2001, absorbing about 250 engineering colleges in Tamil Nadu. Between 2007 and 2010, it was split into six universities, namely, Anna University, Chennai, Anna University, Chennai - Taramani Campus, Anna University Chennai - Regional Office, Tiruchirappalli, Anna University Chennai - Regional Office, Coimbatore, Anna University Chennai - Regional Office, Tirunelveli, and Anna University Chennai - Regional Office, Madurai. On September 14, 2011, a bill was passed to merge back the universities. Anna University has once again become a single affiliating university for engineering colleges all over Tamil Nadu from August 1, 2012. The university departments include College of Engineering, Guindy campus, Madras Institute of Technology - Chromepet campus, ACT campus and SAP campus. Wikipedia.

Flax fibres can be considered as a natural composite, made of concentric layers in which cellulose microfibrils are surrounded helicoidally in a polysaccharidic matrix. They are characterised by low density, high aspect ratio and good specific mechanical properties. These considerations make flax a potential contender for reinforcement in polymer matrix composites, as replacement for the widely used glass fibres. 1 × 1 rib knitted structures are manufactured on a V-bed manual knitting machine using flax yarn. Composites with two and four rib knitted preform layers were fabricated in a hot press. Tensile and compressive tests were carried out and the failure mechanism was analysed, structure of the broken end of the composite was observed by scanning electron microscope (SEM). It is observed that tensile strength and stiffness is a product of the fibre/matrix synergy, whereas the compressive strength and stiffness are contributed by the reinforcing matrix. © 2012 Elsevier Ltd. Source

Suganthi L.,Anna University | Samuel A.A.,Vellore Institute of Technology
Renewable and Sustainable Energy Reviews

Energy is vital for sustainable development of any nation - be it social, economic or environment. In the past decade energy consumption has increased exponentially globally. Energy management is crucial for the future economic prosperity and environmental security. Energy is linked to industrial production, agricultural output, health, access to water, population, education, quality of life, etc. Energy demand management is required for proper allocation of the available resources. During the last decade several new techniques are being used for energy demand management to accurately predict the future energy needs. In this paper an attempt is made to review the various energy demand forecasting models. Traditional methods such as time series, regression, econometric, ARIMA as well as soft computing techniques such as fuzzy logic, genetic algorithm, and neural networks are being extensively used for demand side management. Support vector regression, ant colony and particle swarm optimization are new techniques being adopted for energy demand forecasting. Bottom up models such as MARKAL and LEAP are also being used at the national and regional level for energy demand management. © 2011 Elsevier Ltd. All rights reserved. Source

Reitz R.D.,University of Wisconsin - Madison | Duraisamy G.,Anna University
Progress in Energy and Combustion Science

This article covers key and representative developments in the area of high efficiency and clean internal combustion engines. The main objective is to highlight recent efforts to improve (IC) engine fuel efficiency and combustion. Rising fuel prices and stringent emission mandates have demanded cleaner combustion and increased fuel efficiency from the IC engine. This need for increased efficiency has placed compression ignition (CI) engines in the forefront compared to spark ignition (SI) engines. However, the relatively high emission of oxides of nitrogen (NOx) and particulate matter (PM) emitted by diesel engines increases their cost and raises environmental barriers that have prevented their widespread use in certain markets. The desire to increase IC engine fuel efficiency while simultaneously meeting emissions mandates has thus motivated considerable research. This paper describes recent progress to improve the fuel efficiency of diesel or CI engines through advanced combustion and fuels research. In particular, a dual fuel engine combustion technology called "reactivity controlled compression ignition" (RCCI), which is a variant of Homogeneous Charge Compression Ignition (HCCI), is highlighted, since it provides more efficient control over the combustion process and has the capability to lower fuel use and pollutant emissions. This paper reviews recent RCCI experiments and computational studies performed on light- and heavy-duty engines, and compares results using conventional and alternative fuels (natural gas, ethanol, and biodiesel) with conventional diesel, advanced diesel and HCCI concepts. © 2014 The Authors. Published by Elsevier Ltd. Source

Sivakumar D.,Anna University
International Journal of Environmental Science and Technology

An extensive use of solid-waste landfills for disposal of municipal and industrial wastes have prompted increased attention to groundwater pollution caused by leachate generated in such landfills. The potential for groundwater contamination by leachate has necessitated engineering designs for landfills. The quantity of leachate generated from the solid waste and the movement of water through the solid waste depends on water input and the solid-waste characteristics. This paper dealt with the experimental investigations using the laboratory solid-waste leaching column to estimate the total leachate volume/leachate flow for unsaturated and saturated conditions. The hydraulic properties of the solid waste like initial moisture content, field capacity, permanent wilting point, saturation moisture content, effective void ratio, saturation hydraulic conductivity and saturation suction pressure were determined from the small-scale laboratory experiments, which are the input for analytical model study of leachate flow/total leachate volume for both unsaturated and saturated conditions. The result of analytical model study was compared with the results of experimental investigations. Comparisons of measured and computed total leachate volume/leachate flow using Darcy's law showed reasonable agreement. © 2012 CEERS, IAU. Source

Sivakumar D.,Anna University
International Journal of Environmental Science and Technology

Effects of initial concentrations of Moringa oleifera seed coagulant for removing Chemical Oxygen Demand and Total Dissolved Solids from municipal solid waste leachate have been evaluated at an optimum pH of 7 and temperature of 318 K. The kinetic data obtained from the experiments were fitted to the pseudo first-order, pseudo second-order, Elovich and intraparticle diffusion models. Based on a regression coefficient (R2), the equilibrium (kinetic) data were best fitted with the Elovich model (R2 = 0. 993 for Chemical Oxygen Demand and R2 = 0. 996 for Total Dissolved Solids) than that of other models. The results of the kinetic models study indicated that the adsorption capacity of M. oleifera seed as a coagulant for removing Chemical Oxygen Demand and Total Dissolved Solids in a leachate increased up to 100 mg L-1, beyond which the adsorption capacity got reduced. Finally, the present study concluded that M. oleifera seed coagulant could be employed effectively for the removal of Chemical Oxygen Demand and Total Dissolved Solids in a municipal solid waste leachate. © 2012 CEERS, IAU. Source

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