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R. Praveen Kumar ¹, Swambabu Varanasi ¹, V. Purushothaman ¹

Affiliations
1 School of Chemical and Biotechnology, Sastra University, Thanjavur, IN

Abstract

This research deals with the highly available sugar industry waste material, press mud as low cost biosorbent for the removal of textile dyestuff from aqueous medium, and the investigation of the probably involved physiochemical mechanisms. Experiments were carried out in batch reactor. The results of equilibrium studies showed that equilibrium state was reached within 48 h of exposure time and maximum biosorption taken place at the biosorbent dosage of 30 mg/ml of solution. Secondly, several biosorption kinetic models were applied to fit the experimental data, namely Lagergren irreversible first-order, Reversible first-order, Pseudo-second-order, Elovich and intraparticle diffusion models. The proposed explanations were deduced from the theoretical assumptions behind the most appropriate model(s), which could satisfactorily describe the present biosorption phenomenon. The interpretation of the related results have shown that, with R² of about 99%, the pseudo-second order model is the most suitable dynamic theory describing the biosorption of dye onto press mud predicting therefore a chemisorption process.

Keywords

Biosorption, Press Mud, Dye, Kinetic Modeling

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R. Praveen Kumar ¹

Affiliations
1 Karpagam University, IN

Abstract

Non conventional energy sources like Renewable energy resources are being progressively added to distribution systems using power electronic converters. This paper deals a unique control approach for achieving power quality enhancement and maximum benefits from these transmission lines-interfacing inverters when installed in 3-phase 4-wire lower level distribution systems. This inverter is designed to perform multi level functions. Its design t utilize as the active power filter functions. The inverter is also utilized as power injector generated from renewable energy resource. This is also being shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All these functions may perform either individually or simultaneously. With such unique control, the combination of grid-interfacing inverter and the 3-phase 4-wire linear/non-linear unbalanced lower load at common coupling point appears as balanced linear load to the grid. This novel control concept is demonstrated with extensive MATLAB/Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.

Keywords

Active Power Filter, Grid Distribution, Power Quality, Renewable Energy Resource, Transmission Line Interface.

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R. Praveen Kumar ¹, G. Navaneetha Krishnan ², V. Venkadesh ², N. Premkumar ²

Affiliations
1 Department of Mechanical Engineering, AMET University, Chennai - 603112, Tamil Nadu, IN
2 Department of Mechanical Engineering, K. Ramakrishnan College of Technology, Trichy - 621112, Tamil Nadu, IN

Abstract

The aim of the paper is to design and develop a dual side water pumping system using scotch yoke mechanism. The reciprocating motion of the plunger is utilized for the pumping action. The plunger is reciprocated with the help of a cam plate. By this action the water is pumped with very high pressure and to various heads. This can be utilized for various applications like lubrication in machines and water pumping in agriculture field. The cam plate gets the drive from the motor for its rotation and converts that rotary motion to useful dual side reciprocating motion. The motor is powered with the aid of electric power. Thus the water is pumped from source to various heads.

Keywords

Electric Power, Pumping Elements, Reciprocating Pump, Scotch Yoke

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R. Praveen kumar ¹, M. Sasikumar ¹, S. Dinesh Kumar ²

Affiliations
1 School of Mechanical and Building Sciences (SMBS), VIT University, Chennai Campus, Chennai – 600127, Tamil Nadu, IN
2 Department of Automobile Engineering, Karpaga Vinayaga College of Engineering and Technology, Chennai - 600024, Tamil Nadu, IN

Abstract

Objective: The main aim of this paper is redesigning Muffler internal layout to improve the attenuation based on the critical parameters. Analyzing the baseline muffler design, the area of improvement is identified as frequency range of 250Hz–800Hz. Methods: By keeping t h e volume of muffler constant and varying the critical parameters such as perforation size, length of perforations on the pipe, length of intermediate pipes and the position of baffles thirty iterations were performed. Finding: The exhaust gas flow path was modified in the new concept for better attenuation. Second and fourth chambers were made as expansion chambers. First and third chambers were made as Helmholtz chambers. With this basic flow path, further fine tuning was done by varying the critical parameters. Applications: With this current design and optimistic characteristic, the candidate’s muffler design can be used as noise reduction muffler in automobile industries.

Keywords

Acoustics, Muffler, Sensitivity Analysis, Transmission Loss.

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R. Praveen Kumar ¹, Anurag Parihar ²

Affiliations
1 Department of Chemical Engineering, SASTRA University, Thanjavur, Tamil Nadu, IN
2 Dr. Reddy‟s Laboratory, Hyderabad, IN

Abstract

Gases to particle mass transfer coefficients are measured in a downer.The effects of gas velocity, solid flux and particle size on Mass transfer coefficients are studied. The effect of downer diameter on Mass transfer coefficients was studied by plotting Mass transfer coefficients in terms of dimensionless parameters. Downers are down flow fluidized beds. They offer several advantages compared to risers. 1. Reduced gas and solid back mixing. 2. Reduced contact time between different phases 3.Better control over the reactions. These advantages become significant in several fields where down flow fluidized beds (downers) are used e.g. petroleum industry (FCC), glass industry, fertilizer industry, etc.Some studies have already been done on other parameters of downers like Heat transfer, Particle velocity profiles, etc. The present work reports experimental observation on fluid to particle mass transfer in downers.

Keywords

Downers, FCC, Mass Transfer Coefficients, Solid Flux.

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