Virudhunagar, India
Virudhunagar, India

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Muthusamy C.,Sethu Institute of Technology | Srithar K.,Thiagarajar College of Engineering
Energy | Year: 2017

Humidification dehumidification desalination (HDH) system is viewed as an auspicious technique for medium level investment and productivity. The objective of this work is to enhance the productivity with the saving of input power in a modified HDH system by various changes in its components. Inserts like short length taper twisted tape; internally finned cut out conical turbulator and half perforated circular inserts with various orientations and three different pitch ratios (PR) are used in the air heater. Two types of packing materials (Gunny bag and saw dust) are employed in humidifier section and two different dehumidifier are tested to choose the good one and it is further integrated with spring inserts of different PR to enhance its performance. The best combination is identified when the air heater equipped with divergent twisted tape of PR 3, humidifier furnished with gunny bag and dehumidifier fixed with spring insert of PR 3. Higher productivity of 0.8 kg/h with the reduction in salinity (3.2 mg/l of chloride content) attained with 40% saving of input power in the modified HDH desalination system. A noticeable saving in energy with significant development in energy and exergy efficiency is observed. The economic analysis is also carried out. © 2016 Elsevier Ltd

Vijayalakshmi M.,Sethu Institute of Technology | Sekar A.S.S.,Alagappa Chettiar College of Engineering And Technology | Ganesh Prabhu G.,Sethu Institute of Technology
Construction and Building Materials | Year: 2013

Granite stones processing industry from Tamilnadu state produces tons of non-biodegradable fine powder wastes and utilization of that hazardous waste in concrete production will lead to green environment and sustainable concrete technology. The main objective of this study is to experimentally investigate the suitability of granite powder (GP) waste as a substitute material for fine/natural aggregate in concrete production. The experimental parameter was percentage of granite powder substitution. Concrete mixtures were prepared by 0%, 5%, 10%, 15%, 20% and 25% of fine/natural aggregate substituted by GP waste. Various mechanical properties such as compressive strength, split tensile strength, flexural strength; ultrasonic pulse velocity (UPV) and elastic modulus were evaluated. To ensure the reliability of its usage in aggressive environments, the durability properties such as water permeability, rapid chloride penetration (RCPT), carbonation depth, sulphate resistance and electrical resistivity was also determined. The obtained test results were indicated that the replacement of natural sand by GP waste up to 15% of any formulation is favorable for the concrete making without adversely affecting the strength and durability criteria however it is recommended that the GP waste should be subjected to a chemical bleaching process prior to blend in the concrete to increase the sulphate resistance. © 2013 The Authors. Published by Elsevier Ltd. All rights reserved.

Kailasanathan C.,Sethu Institute of Technology | Selvakumar N.,Mepco Schlenk Engineering College, Sivakasi | Naidu V.,Sethu Institute of Technology
Ceramics International | Year: 2012

This work deals with the preparation of ceramic composites to be employed for the development of load bearing bone substitutes, made of inorganic minerals of needle like nano hydroxyapatite [nHAp: Ca 10(PO 4) 6(OH) 2] with bioinert titania as a reinforcing phase and gelatin as protein that mimic the natural bone exhibiting improved biomechanical features. As a monolithic, use of nHAp is limited for biomedical applications because of its inherent low fracture toughness and lack of flexibility. Hence, the incorporation of ceramics such as alumina, zirconia and titania is considered necessary to boost its mechanical properties. The composites of nHAp/TiO 2/gelatin in different weight percentage were prepared by phase separation technique. The identification and morphology of chemically synthesized nHAp particles were determined by XRD, FTIR and SEM analyses. The porosity of scaffolds varied from 77% to 82%. FTIR and XRD analyses showed the presence of molecular interactions and chemical linkages between nHAp particles, titania and gelatin matrix. The compressive strength of titania reinforced nanocomposites scaffolds could be elevated up to 10.15 MPa while those of nHAp/gelatin were 4.87 MPa. These results show that newly developed nHAp/TiO 2/gelatin composites may be superior for bone tissue engineering. © 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Kailasanathan C.,Sethu Institute of Technology | Selvakumar N.,Mepco Schlenk Engineering College, Sivakasi
Ceramics International | Year: 2012

Recently, nano bio-composites have emerged as an efficient strategy to upgrade the structural and functional properties of synthetic bone grafts. Bioinert ceramics have attracted wide attention because of their biocompatibility. Novel composites of nano-hydroxyapatite/GEL with incorporation of bioinert ceramics like Al 2O 3, TiO 2 and ZrO 2 for different composites as a reinforcing phase to increase its mechanical properties was prepared. The nHAp with the size of 10-50 nm in diameter and 50-100 nm in length was uniformly distributed into GEL matrix to form the composite. It was found that the composite with a high ceramic content has good homogeneity and mechanical strength, which are close to the cancellous bone. An interconnected porous material with porosity of at least 74% was achieved by phase inversion method. The formation reaction of the nHAp/GEL/bioinert ceramic nanocomposite was then investigated via FT-IR, XRD, TG/DTA and SEM. The organic-inorganic interaction between HAp nano crystallites and GEL molecules were confirmed from FT-IR and TG/DTA. The compressive strength of bioinert ceramic reinforced nanocomposites scaffolds could high up to 13.15 MPa while those of nHAp/GEL were 4.87 MPa. The nano indentation technique was used to find nano hardness and fracture toughness was evaluated by Vickers indentation. © 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Ganesh Prabhu G.,Sethu Institute of Technology | Sundarraja M.C.,Thiagarajar College of Engineering
Construction and Building Materials | Year: 2013

This paper focused on experimentally and analytically investigates the suitability of carbon fibre reinforced polymer (CFRP) strips composites in strengthening of CFST members under compression. The size and height of the columns were 91.5 × 91.5 × 3.6 mm and 600 mm respectively. CFRP fabrics was used as horizontal strips (lateral ties) with several other parameters such as the number of layers, width and spacing of strips. Among the 21 columns, eighteen columns were externally strengthened by CFRP strips having a constant width of 50 mm with the spacing of 30 mm and 40 mm, and the remaining three columns were reference column. Experimental results were revealed that external wrapping of CFRP strips provides restraint against the lateral deformation effectively and delays the local buckling of steel tube. Axial deformation control and load bearing capacity of the confined columns increases as the number of layers increases in addition to that increases in the load bearing capacity mainly depends upon the proper spacing between the CFRP strips. Analytical model was proposed herein for predicting the load bearing capacity of CFRP confined CFST columns. © 2013 Elsevier Ltd. All rights reserved.

Muthusamy C.,Sethu Institute of Technology | Srithar K.,Thiagarajar College of Engineering
Desalination | Year: 2015

An experimental analysis is conducted to accelerate the productivity of the humidification dehumidification (HDH) desalination system. In the air heater region of the HDH desalination system, inserts namely (i) twisted tape in short length with tapered form, (ii) cut out conical turbulators integrated with internal fins arranged in convergent and divergent mode and (iii) half perforated circular inserts with an orientation angle of 45°, 90°, and 180° are tried out respectively with pitch ratio (PR) of 3, 4 and 5 to enhance the heat transfer rate in the air heater. Two types of packing materials, such as gunny bag and saw dust, are tested in the humidifier region accommodating the mass transfer rate. Also an attempt has been made to augment the overall heat transfer coefficient in the dehumidifier with spring insert for PR of 3 and 4. An energy and exergy analysis construed the quantity of effective utilization of energy with the modified HDH desalination system. The enhanced system produced 45% increase of productivity compared to conventional system of 0.340. kg/h. For the same input power, the modified system enhanced the heat output and productivity equivalent to a power saving of 40% and 13% respectively. © 2015 Elsevier B.V.

Ramalakshmi S.S.,Sethu Institute of Technology
2011 International Conference on Recent Advancements in Electrical, Electronics and Control Engineering, IConRAEeCE'11 - Proceedings | Year: 2011

Distributed generation (DG) promises many potential benefits, including peak shaving, price hedging, fuel switching, improved power quality and reliability, increased efficiency and improved environmental performance. For these reasons, DG predicted to play an increasing role into the electric power systems of the near future. In this paper, two types of DGs are considered for implementation and DGs are modelled as PQ bus. The suitable location for placing distributed generation (DG) is identified through loss sensitivity factors and L index. The fuzzy adaptation of evolutionary programming has been chosen as it is particularly suited while solving optimization problems of multiobjectives. This technique is used to find the optimal size of distributed generation (DG). The objective of this paper is to minimize the total payments toward compensating for system losses and DG's capital costs by optimal siting and sizing of two types of DG. This new technique is tested on IEEE-34 bus radial distribution system and the results obtained justify the importance of optimal placement of distributed generation (DG) for minimizing losses and maximizing saving while maintaining appropriate voltage profile at all the buses. © 2011 IEEE.

Seenivasagam V.,National Engineering College | Velumani R.,Sethu Institute of Technology
Computational and Mathematical Methods in Medicine | Year: 2013

Healthcare institutions adapt cloud based archiving of medical images and patient records to share them efficiently. Controlled access to these records and authentication of images must be enforced to mitigate fraudulent activities and medical errors. This paper presents a zero-watermarking scheme implemented in the composite Contourlet Transform (CT) - Singular Value Decomposition (SVD) domain for unambiguous authentication of medical images. Further, a framework is proposed for accessing patient records based on the watermarking scheme. The patient identification details and a link to patient data encoded into a Quick Response (QR) code serves as the watermark. In the proposed scheme, the medical image is not subjected to degradations due to watermarking. Patient authentication and authorized access to patient data are realized on combining a Secret Share with the Master Share constructed from invariant features of the medical image. The Hu's invariant image moments are exploited in creating the Master Share. The proposed system is evaluated with Checkmark software and is found to be robust to both geometric and non geometric attacks. © 2013 V. Seenivasagam and R. Velumani.

Arun K.,Sethu Institute of Technology
European Journal of Scientific Research | Year: 2012

Experiments are carried out by using dual biodiesel blends and compared it with diesel fuel characteristics. The literatures were focused on single biodiesel and its blends. So far a very few dual biodiesel blends of oils have been tried on diesel engine leaving a lot of scope in this area. This paper investigated the performance and emission characteristics of various dual biodiesel blends (mixture of jatropha biodiesel and neem biodiesel) with diesel on a stationary single cylinder, four stroke direct injection compression ignition engine. The blends of BB 10 (combination of Diesel 90% by volume, jatropha biodiesel 5% by volume and Neem biodiesel 5% by volume) and BB 20 (combination of Diesel 80% by volume, jatropha biodiesel 10% by volume and Neem biodiesel 10% by volume) gave better brake thermal efficiency and lower brake specific fuel consumption than other dual biodiesel blends (BB 40, BB 80 and BB 100). The blends of BB 10 and BB 20 have superior emission characteristics than other blends and closer to diesel values. © Euro Journals Publishing, Inc. 2012.

Adam Khan M.,Sethu Institute of Technology | Senthil Kumar A.,Sethu Institute of Technology
Journal of Manufacturing Processes | Year: 2011

This paper deals with the machining of glass fibre reinforced plastic (GFRP) composite material. GFRP composite material was fabricated in our laboratory using E-glass fibre with unsaturated polyester resin. GFRP composite specimens were prepared using a filament winding process. Machining studies were carried out using two different alumina cutting tools: namely, a Ti[C, N] mixed alumina cutting tool (CC650) and a SiC whisker reinforced alumina cutting tool (CC670). The machining process was performed at different cutting speeds at constant feed rate and depth of cut. The performance of the alumina cutting tools was evaluated by measuring the flank wear and surface roughness of the machined GFRP composite material. An attempt is made to analyse the main wear mechanism of alumina cutting tools while machining GFRP composite material. © 2010 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.

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