INTERNATIONAL JOURNAL OF INNOVATIONS IN ENGINEERING RESEARCH AND TECHNOLOGY

6

Authors: Mr. Kedar M. Relekar 2 Mr. Ashish B. Kalase 3 Mr. Sachin Pralhad Dubal

It is well known fact that the solar water heaters are used in residential, domestics and industrial applications. More than hundred years ago, black painted water tanks were being used as simple solar water heaters. Solar water heating (SWH) technology is greatly improved during the past century. In SWH technology hot water is stored until it is needed at a later time in a mechanical room, or on the roof in the case of a thermo-siphon system. In this paper effort is made to introduce ‘Utilisability Method’ for the performance evaluation of solar water heater without storage, in detail. This method enables the calculation of monthly amount of energy delivered by hot water system, given monthly values of incident solar radiation, ambient temperature and load.

7

Authors: V. V. Potdar Umashankar Rawat

Austenitic stainless steel is one of the most important engineering materials with wide variety of applications. Superior resistance to corrosion and compatibility in high temperature and high vacuum has particularly made it an attractive choice. However, the machinability of austenitic stainless steel is not very promising owing to lower thermal conductivity, higher degree of ductility and work harden ability. Chromium, Nickel, Copper and Molybdenum gives 904L better corrosion resistance properties in sulphuric and phosphoric acid environment. It has excellent forming and welding characteristics. The present work is concentrated on dry turning of 904L. In this study the effect of cutting parameters on cutting force is studied by experimentation. A plan of experiments is done by Taguchi design of experiments to acquire data. The obtained data is validated by calculating S/N ratio and plotting a graph.

7

Authors: Milind Deshmukh 2 Anant Chipade

Auto shut off valve with double piping inlet is to be installed in disc type industrial filter, Filter is used for lime mud /pulping filtration, supply shut off is to be made with acting along auto scraper board mechanism which is installed for mud remover on multiple disc. Mechanism is to be done within limited parameters so that work and application can be effective on site. Whole project work is designed with simple and light weight mechanical links which will be proved with analysis result to carry out its behaviour under running conditions. Valve is effectively design to stop supply to the two pipes which are 3 inch in diameter. Valve will take inlet flow of ~150 LPM from each inlet. The mechanism of auto shut off valve is made for special purpose customised operation. All the linkages used are designed with proper mechanical calculations and forces study to sustain incoming pressure with its boundary conditions considerations. Main design of leak proof piston is took effort to work this valve effectively attached with collinear straight line bar mechanism with working on pneumatic double acting cylinder. Validation of valve, piston and mechanism under it will be carried out with structural analysis all the stress and deflection study is to be done to prove its capability and feasibility in the machine.

9

Authors: Mr. Ganapati Vhanamane 2 Dr. B. P. Ronge

Suspension systems, in the automotive application context, have been designed to maintain contact between a vehicle’s tires and the road, and to isolate the frame of the vehicle from road disturbances. Dampers, or so-called shock absorbers, as the undeniable heart of suspension systems, reduce the effect of a sudden bump by smoothing out the shock. In most shock absorbers, the energy is converted into heat via viscous fluid. In hydraulic cylinders, the hydraulic fluid is heated up. In air cylinders, the hot air is emitted into the atmosphere. There are several common approaches for shock absorption, including material hysteresis, dry friction, fluid friction, compression of gas, and eddy currents. Eddy currents are induced in a conductor either by the movement of the conductor in a static field or a change in the strength of the magnetic field. The generated eddy currents create electromagnets with magnetic fields that oppose the change in an external magnetic field, causing a repulsive force proportional to the relative velocity of the field and conductor. Consequently, the eddy current damping device acts like a viscous damper, causing the vibration energy of the moving mass to dissipate through resistive/Joule heating, generated in the conducting component. The use of the eddy current damping phenomenon is appealing, because the damper structure is simple and requires neither external power supply nor electronic devices; in addition, no fluid is involved in the damper, and the moving parts of the damper have no mechanical contact. Applications of the eddy current damping effect in vibration suppression studies have been reported, but, to the best of the author’s knowledge, the application of the eddy current in vehicle suspension systems has not been addressed in prior publications. Chapter 3 covers the development and feasibility study of utilizing eddy current damping effect as a potential passive damping source in vehicle suspension applications. In conventional hydraulic suspension systems, shock absorbers convert the mechanical energy of the vibration into heat energy, so this mechanical energy is dissipated (Suda et al., 1996). Segal et al. (1982) have demonstrated that roughly 200 watts of power are dissipated in an ordinary sedan traversing a poor road at 13.4 m/s; hence, suspension systems have the potential for energy regeneration. Using electromagnetic dampers (composed of electromechanical elements), the kinetic energy of vehicle body vibration can be regenerated as useful electrical energy. The electromagnetic dampers (as actuators) have the potential to be used in active suspension systems. In this paper it is proposed to prepare a model of Permanent magnetic eddy current damper. For the advantages of non-contact, mechanical friction free, lubrication free, controllable and measurable stiffness and damping properties, Permanent magnetic damper does not require extra power supply or excitation winding, so it is energy-saving, highly efficient and greater in braking density [3]. The design of a new permanent magnetic eddy current damper is proposed in this thesis, which can provide planar electromagnetic damping force on mangle positioning platform [4] and other accurate positioning systems and meet the needs of fast, accurate and stable positioning. Based on the structural design, the dissertation work suggests a model of permanent magnetic eddy current damper by using FFT analysis.

9

Authors: Mr. Kurri Rohan Ramesh 2 Prof. Jagtap Shrikant Tukaram

The paper represent the work done for making mathematical models for analysis of the effects of machining parameters on the performance characteristics in EDM process of Alloy steel (EN-31). The mathematical models are developed using the response surface methodology (RSM) to explain the influences of machining parameters on the performance characteristics in the EDM process.

10

Authors: Trishala K. Balsaraf 2 Mahesh N. Karanjkar

In current years there has been an increasing interest in the study of sparse representation of signals. Using an overcomplete glossary that contains prototype signal-atoms, signals are described by sparse linear combinations of these atoms. Recognition of persons by means of biometric description is an important technology in the society, because biometric identifiers cannot be shared and they intrinsically characterize the individual’s bodily distinctiveness. Among several biometric recognition technologies, fingerprint compression is very popular for personal identification. One more fingerprint compression algorithm based on sparse representation using K-SVD algorithm is introduced. In the algorithm, First we construct a dictionary for predefined fingerprint photocopy patches. For a new given fingerprint images, suggest its patches according to the dictionary by computing l^0-minimization by MP method and then antiquate and encode the representation.This paper compares dissimilar compression standards like JPEG,JPEG-2000,WSQ,K-SVD etc. The paper show that this is effective compared with several competing compression techniques particularly at high compression ratios.

13

Authors: A L Dhobale ,Prof H K Mishra

Present work investigates the effect of heat input (controlled by welding current, welding voltage and welding speed) on tensile strength, micro-hardness and microstructure elements produced by shielded metal arc welding (SMAW). From the experimental results it was found that the increase in heat input affects the micro-constituents of base metal, and heat affected zone (HAZ). Tensile strength decreases with increase in heat input and from scanning electron microscopy of tensile test fractured surfaces exhibited ductile & brittle failure. From micro hardness data values it was observed that hardness of material increases with increase in heat input in weld pool and decreases in HAZ zone. Optical microscopy shows that smaller dendrite sizes and lesser inter-dendritic spacing were observed in the fusion zone at low heat input. And long dendrite sizes and large inter-dendritic spacing were observed in the fusion zone of the joint welded at high heat input. Further it was observed from the optical micrographs that the extent of grain coarsening in the HAZ increases with increase in heat input. The welding heat input has a great influence on the weldments properties. This paper describes the influence of welding heat input on the weld metal toughness of high-carbon steel surface welded joint.