Raigad, India

Dr. Babasaheb Ambedkar Technological University is a unitary, state university located at Lonere in Raigad district, Maharashtra, India. Established by Government of Maharashtra in 1989 under the Government of Maharashtra Act 1983. The University is set to become the center of all the engineering and technological Institutes in Maharashtra. Wikipedia.

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Patil N.G.,Dr. Babasaheb Ambedkar Technological University | Brahmankar P.K.,Dr. Babasaheb Ambedkar Technological University
International Journal of Advanced Manufacturing Technology | Year: 2010

Non-traditional process like wire electro-discharge machining is found to show a promise for machining metal matrix composites. However, the machining information for the difficult-to-machine particle-reinforced material is inadequate. This paper is focused on experimental investigation to examine the effect of electrical as well as non-electrical machining parameters on performance in wire electro-discharge machining of metal matrix composites (Al/Al2O3p). Taguchi orthogonal array was used to study the effect of combination of reinforcement, current, pulse on-time, off-time, servo reference voltage, maximum feed speed, wire speed, flushing pressure and wire tension on cutting speed, surface finish, and kerf width. Reinforcement percentage, current, and on-time was found to have significant effect on cutting rate, surface finish, and kerf width. The optimum machining parameter combinations were obtained for surface finish, cutting speed, and kerf width separately. Wire breakages were found to pose limitations on the cutting speed in machining of these materials. Wire shifting was found to deteriorate the machined surfaces. © 2009 Springer-Verlag London Limited.

Kinhal V.G.,Dr. Babasaheb Ambedkar Technological University | Agarwal P.,Indian Institute of Technology Roorkee | Gupta H.O.,Indian Institute of Technology Roorkee
IEEE Transactions on Power Delivery | Year: 2011

The application of artificial intelligence is growing fast in the area of power electronics and drives. The artificial neural network (ANN) is considered as a new tool to design control circuitry for power-quality (PQ) devices. In this paper, the ANN-based controller is designed for the current control of the shunt active power filter and trained offline using data from the conventional proportional-integral controller. A digital-signal-processor-based microcontroller is used for the real-time simulation and implementation of the control algorithm. An exhaustive simulation study is carried out to investigate the performance of the ANN controller and compare its performance with the conventional PI controller results. The system performance is also verified experimentally on a prototype model developed in the laboratory. © 2010 IEEE.

Patil N.G.,Dr. Babasaheb Ambedkar Technological University | Brahmankar P.K.,Dr. Babasaheb Ambedkar Technological University
International Journal of Advanced Manufacturing Technology | Year: 2010

Wire electro-discharge machining (WEDM) is a vital process in manufacturing intricate shapes. The present work proposes a semi-empirical model for material removal rate in WEDM based on thermo-physical properties of the work piece and machining parameters such as pulse on-time and average gap voltage. The model is developed by using dimensional analysis and non-linear estimation technique such as quasi-Newton and simplex. Predictability of the proposed model is more than 99% for all work materials studied. The work materials were silicon carbide particulate reinforced aluminium matrix composites. The experiments and model prediction show significant role of coefficient of thermal expansion in WEDM of these materials. In addition, an empirical model, based on response surface method, has also been developed. The comparison of these models shows significant agreement in the predictions. © 2010 Springer-Verlag London Limited.

Sarkar J.,H+ Technology | Agrawal N.,Dr. Babasaheb Ambedkar Technological University
International Journal of Thermal Sciences | Year: 2010

Being a low critical temperature fluid, CO2 transcritical system offers low COP for a given application. Parallel compression economization is one of the techniques to improve the COP for transcritical CO2 cycle. An optimization study of transcritical CO2 refrigeration cycle with parallel compression economization is presented in this paper. Further, performance comparisons of three different COP improvement techniques; parallel compression economization alone, parallel compression economization with recooler and multistage compression with flash gas bypass are also presented for chosen operating conditions. Results show that the parallel compression economization is more effective at lower evaporator temperature. The expression for optimum discharge pressure has been developed which offers useful guideline for optimal system design and operation. Study shows that the parallel compression with economizer is promising transcritical CO2 cycle modifications over other studied cycle configurations. A maximum improvement of 47.3% in optimum COP is observed by employing parallel compression economization for the studied ranges. © 2009 Elsevier Masson SAS.

Mane V.S.,Dr. Babasaheb Ambedkar Technological University | Vijay Babu P.V.,Dr. Babasaheb Ambedkar Technological University
Journal of the Taiwan Institute of Chemical Engineers | Year: 2013

Eucalyptus wood (Eucalyptus globulus) saw dust (SD) was treated using sodium hydroxide to improve adsorption capacity for the removal of Congo red from aqueous solutions. The treated saw dusts using sodium hydroxide was evaluated through SEM, FTIR, TGA and XRD. The Brunauer-Emmett-Teller (BET) surface area, pore volume and average pore diameter of SD were 0.3742m2/g, 0.00836cm3/g and 893.6Å. Average particle size of SD was 182.8μm. Bulk density of SD was 212kg/m3. The porosity of SD is 0.3. Equilibrium and kinetic adsorption studies were carried using SD. The effect of various operating parameters like initial pH, contact time, adsorbent dose, initial concentration and temperature on the removal of Congo red has been studied. The Congo red adsorption data were fitted to various isotherm models. It was found that Redlich and Peterson (R-P) model fitted well. The optimum pH for the adsorption was 7. The kinetics of adsorption showed that the Congo red adsorption on SD is a gradual process with quasi-equilibrium being attained in 4h. The data obtained were also applied to pseudo first-order, pseudo second-order and Weber-Morris equations. The rates of adsorption were found to conform to pseudo second-order kinetics. The adsorption of the Congo red increased with increasing temperature indicating the endothermic nature of the adsorption process. Thermodynamic parameters such as free energy, enthalpy and entropy change were calculated. This adsorbent was found to be both effective and economically viable. © 2012 Taiwan Institute of Chemical Engineers.

Vadirajacharya,Dr. Babasaheb Ambedkar Technological University | Katti P.K.,Dr. Babasaheb Ambedkar Technological University
Energy Procedia | Year: 2012

In India, more than 200 million people live in rural areas without access to grid-connected power. A convenient & cost-effective solution would be hybrid power systems which can reduce dependency on grid supply, improve reliability. For a typical domestic load a solar -wind hybrid system is designed with charge controller to charge a conventional battery. To optimize system efficiency, a simple algorithm is developed for system sizing. Total cost of unit is calculated using life cycle cost analysis and payback period. © 2011 Published by Elsevier Ltd.

Mane V.S.,Dr. Babasaheb Ambedkar Technological University | Babu P.V.V.,Dr. Babasaheb Ambedkar Technological University
Desalination | Year: 2011

The present study explored the adsorptive characteristics of Brilliant Green dye from aqueous solution onto NaOH treated saw dust of Indian Eucalyptus wood, a timber industry waste. Batch studies were performed to evaluate the influence of various experimental parameters like initial pH, contact time, adsorbent dose, initial concentration and temperature on the removal of Brilliant Green. Optimum conditions were found to be initial pH=2.9, contact time=3h and adsorbent dose=4g/l. The pseudo-second-order kinetic model represented the adsorption kinetics of Brilliant Green onto NaOH treated saw dust. Equilibrium isotherms were analyzed by Freundlich, Langmuir, Redlich-Peterson and Temkin isotherm models using non-linear regression technique. NaOH treated saw dust which was used showed surface area=0.3742m2/g, pore volume=0.00836cm3/g and average pore diameter=893.6A0. Adsorption of Brilliant Green onto NaOH treated saw dust is favorably influenced by decrease in the temperature of the operation. Thermodynamics showed that the Brilliant Green adsorption was most favorable onto NaOH treated saw dust. © 2011 Elsevier B.V.

Deosarkar M.P.,Institute of Chemical Technology | Sathe V.S.,Dr. Babasaheb Ambedkar Technological University
Powder Technology | Year: 2012

In this paper, we study the theoretical models for effect of various parameters used for predicting viscosity of magnetite ore slurry. These models are fitted using data collected from experiments conducted. These viscous slurries of magnetite ore have up to 30% solids (by weight). We prepared the slurry samples of magnetite in aqueous solutions of high viscosity powder of sodium salt of carboxy methyl cellulose (CMC) and guar gum. Average particle sizes of the four solid samples used were of 50, 52.3, 58.4 and 74.8 μm. The viscosity of slurry samples was measured using Brookfield DV-III + programmable rheometer. Once the experimental data was collected, we selected six different models for predicting viscosity; also we used artificial neural networks (ANN) for fitting the experimental data, and, trained the neural networks to predict viscosity for unknown samples. We have finally computed the root mean square errors (RMSE) between model predictions and corresponding measured value of viscosity. The conclusions drawn and certain observations made are reported. © 2011 Elsevier B.V.

Patil S.V.,Dr. Babasaheb Ambedkar Technological University | Vijay Babu P.V.,Dr. Babasaheb Ambedkar Technological University
Experimental Heat Transfer | Year: 2014

Experimental studies on friction factor and heat transfer characteristics for the laminar flow of ethylene glycol in a square duct fitted with twisted tapes of different twist ratios under nearly uniform wall temperature conditions are reported in this article. The Nusselt numbers were found to be 5.44-7.49 and 2.46-4.87 times that of plain square duct forced convection values based on constant flow rate and constant pumping power criteria, respectively, for y = 2.66. The augmented friction factor and Nusselt number for a square duct is about 1.9 and 2.10 times higher than that for an augmented circular tube. © Taylor & Francis Group, LLC.

This paper presents an experimental study on engine performance & emission based on Taguchi method and grey relational analysis for optimization of six input parameters and their five levels. Combined effect of input parameters viz. compression ratio, injection pressure, injection-nozzle geometry, additive, fuel fraction and EGR in controlling BSFC and NOxas the response variables in CI engine fueled with Mangifera Indica biodiesel blends was investigated. Number of experiments was reduced by employing Taguchi's L25orthogonal array. The signal-to-noise (S/N) ratio and grey relational analysis techniques were used for data analysis. The combination of six input parameters was obtained for optimized engine performance and emission. The optimal combination of input parameters so obtained was further confirmed through experiments. The injection nozzle geometry was the most influencing parameter. The GRG improvement with mangifera indica Methyl Ester blend is 84.26% compared to GRG at initial settings of engine for diesel fuel. © Copyright 2016 SAE International.

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